git.iko.soy/schematic
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.travis.ymlnew file+25
since splitsnapshots
unifiedsplit
@@ -0,0 +1,25 @@
1+sudo: required
2+
3+language: c
4+
5+addons:
6+ apt:
7+ packages:
8+ - libgmp-dev
9+
10+env:
11+ - STACK_YAML=stack.yaml
12+
13+install:
14+ - mkdir -p ~/.local/bin
15+ - export PATH=$HOME/.local/bin:$PATH
16+ - travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
17+ - stack --version
18+ - stack setup --no-terminal
19+
20+script:
21+ - stack test --ghc-options=-Werror --no-terminal
22+
23+cache:
24+ directories:
25+ - $HOME/.stack
ChangeLog.mdnew file+55
@@ -0,0 +1,55 @@
1+# Revision history for schematic
2+
3+## 0.5.0.0 -- 2019-02-20
4+
5+GHC 8.6, json generation by schema definition, validation bug fixes, better
6+parsing error messages.
7+
8+## 0.4.3.0 -- 2018-07-12
9+
10+GHC 8.4 support, dropping support for older GHC versions
11+
12+## 0.4.2.0
13+
14+Support ghc-8.4 and drop support for older versions
15+
16+## 0.4.1.0 -- 2017-11-05
17+
18+Convenience isomorphisms: txt, num, opt, bln etc
19+
20+## 0.4.1.0 -- 2017-11-01
21+
22+flens and fget now use type application syntax
23+
24+## 0.4.0.0 -- 2017-10-17
25+
26+Object building DSL, more convenience helpers, MCons simplified with Tagged
27+
28+## 0.3.2.0 -- 2017-10-02
29+
30+Fixed FIndex bug, added bunch of convenience isomorphism, re-exports.
31+
32+## 0.3.1.0 -- 2017-09-28
33+
34+Add UUID and ISO8601 helpers, json schema constraint export, fsubset lens
35+combinator.
36+
37+## 0.3.0.0 -- 2017-09-28
38+
39+Updated to GHC 8.2.1 and singletons 2.3.1
40+
41+## 0.2.1.0 -- 2017-09-26
42+
43+Add decodeAndValidateVersionedWithPureMList, fix tests
44+
45+## 0.2.0.0 -- 2017-09-26
46+
47+Migratable is deprecated, migrations are now possible in an arbitrary monad.
48+
49+## 0.1.5.0 -- 2017-08-22
50+
51+Lens compatibility for typed json objects.
52+
53+## 0.1.0.0 -- YYYY-mm-dd
54+
55+* First version. Released on an unsuspecting world.
README.mdnew file+255
@@ -0,0 +1,255 @@
1+# schematic
2+
3+[![Build Status](https://travis-ci.org/typeable/schematic.svg?branch=master)](https://travis-ci.org/typeable/schematic)
4+
5+## Goal
6+
7+The goal of the library is to provide a type-safe transport layer for serializing and validating JSON. It can be thought of as a subset of [json-schema](http://json-schema.org), which is basically a specification of a JSON document. The other goal is getting as much as possible from this specification for free. Right now the following bits are prototyped:
8+
9+* All of the instantiations of the transport types structurally follow the schema provided by user
10+* Serializers are generic, so they follow from the type-level schema and the're supposed to have a roundtrip property by an implementation.
11+* Runtime value validators are generated from the schema. Validation errors are reported as a pairs of a json-path to the element and an error message.
12+* There are migrations. It's possible to describe a series of migrations to the schema and have all the necessary machinery to deserialize a user specified version of the schema if there are multiple versions available.
13+* Schematic schemas can be exported to [json-schema](http://json-schema.org)
14+
15+Be aware that library is experimental and subject to change a lot. The current state can be viewed as a prototype.
16+
17+## Installation
18+
19+* Install [Stack](https://github.com/commercialhaskell/stack)
20+
21+```
22+$ stack install schematic
23+```
24+
25+## GHC Extensions
26+
27+To use this library without any hassle you should add a few GHC extension
28+either to a module or a cabal file:
29+
30+```
31+DataKinds
32+OverloadedLists
33+OverloadedStrings
34+TypeApplications
35+```
36+
37+`Overloaded`-extensions are being used only by `field` combinator,
38+so if you don't use it - feel free to disable it.
39+
40+## GHC Options
41+
42+I recommend using `{-# OPTIONS_GHC -fno-warn-unticked-promoted-constructors #-}`
43+pragma in modules which declare schemas and schema migrations, because `schematic`
44+heavily uses promoted types which should be prefixed with "`" signs and they can
45+be dropped with this option, making it less noisy visually.
46+It's entirely optional and totally opinionated, so feel free to ignore this.
47+Through the documentation, the code is written without any explicit ticks for
48+the same reason.
49+Notice that they're still needed for type-level lists and tuples in schematic code.
50+
51+## Basic Examples
52+
53+```haskell
54+type SchemaExample
55+ = SchemaObject
56+ '[ '("foo", SchemaArray '[AEq 1] (SchemaNumber '[NGt 10]))
57+ , '("bar", SchemaOptional (SchemaText '[TEnum '["foo", "bar"]]))]
58+```
59+
60+* This schema says that's structurally it's a JSON object which has two fields:
61+ * field "foo" contains an array of numeric values
62+ * field "bar" contains an optional text value
63+* It also allows you to validate JSON values itself:
64+ * an array in "foo" contains exactly one element
65+ * that element must be strictly greater than 10
66+ * value of "bar" field must be either "foo" or "bar" if presented
67+
68+
69+This one is valid for example
70+
71+```haskell
72+schemaJson :: ByteString
73+schemaJson = "{\"foo\": [13], \"bar\": null}"
74+```
75+
76+Also valid
77+
78+```haskell
79+schemaJson :: ByteString
80+schemaJson = "{\"foo\": [13], \"bar\": \"bar\"}"
81+```
82+
83+it can be parsed and validated like this:
84+
85+```haskell
86+decodeAndValidateJson schemaJson :: ParseResult (JsonRepr SchemaExample)
87+```
88+
89+`ParseResult` type encodes three possible situations:
90+* json is structurally consistent with a schema and runtime validations pass
91+* json source is malformed or doesn't correspond to a schema structurally
92+* some of the runtime validations have failed, but it's structurally correct
93+ overall
94+
95+It implies a transport layer representation of that data that can be traversed
96+and transformed to whatever internal types user has.
97+It's called `JsonRepr`. Type parameter is the schema itself.
98+
99+```haskell
100+jsonExample :: JsonRepr SchemaExample
101+jsonExample = withRepr @SchemaExample
102+ $ field @"foo" [12]
103+ :& field @"bar" (Just "bar")
104+ :& RNil
105+```
106+
107+The most basic and sugar-free way of constructing the same object will look like this:
108+
109+```
110+jsonExample' :: JsonRepr SchemaExample
111+jsonExample' = ReprObject $
112+ FieldRepr (ReprArray [ReprNumber 12])
113+ :& FieldRepr (ReprOptional (Just (ReprText "bar")))
114+ :& RNil
115+```
116+
117+## Lens-compatibility
118+
119+It's possible to use `flens` to construct a field lens for a typed object in schematic. Let's suppose you have a schema like this:
120+
121+```haskell
122+type ArraySchema = SchemaArray '[AEq 1] (SchemaNumber '[NGt 10])
123+
124+type ArrayField = '("foo", ArraySchema)
125+
126+type FieldsSchema =
127+ '[ ArrayField, '("bar", SchemaOptional (SchemaText '[TEnum '["foo", "bar"]]))]
128+
129+type SchemaExample = 'SchemaObject FieldsSchema
130+
131+```
132+
133+There are two ways of working with named fields in the objects:
134+
135+* Using the `fget` and `fset` functions: `fget @"foo" (fput newFooVal objectData) == newFooVal`
136+* Using the lens library: `set (flens @"foo") newFooVal objectData ^. flens @"foo" == newFooVal`
137+
138+## Migrations
139+
140+Usually migrations are implicit and hard to deal with, `schematic` deals with it
141+by giving tools to deal with it to a programmer, being as explicit as possible,
142+notifying the developer of a missing transition with a compile-time error.
143+It allows to build versioned HTTP APIs or migrate data from the older versions
144+when reading from the JSON storages.
145+
146+It's possible to represent schema changes as a series of migrations,
147+which describes a series of json-path/change pairs. Migrations can be applied in
148+succession.
149+
150+This piece of code will apply a migration to the schema, decode and validate the latest version.
151+
152+```haskell
153+type SchemaExample
154+ = SchemaObject
155+ '[ '("foo", SchemaArray '[AEq 1] (SchemaNumber '[NGt 10]))
156+ , '("bar", SchemaOptional (SchemaText '[TEnum '["foo", "bar"]]))]
157+
158+type TestMigration =
159+ 'Migration "test_revision"
160+ '[ Diff '[ PKey "bar" ] (Update (SchemaText '[]))
161+ , Diff '[ PKey "foo" ] (Update (SchemaNumber '[])) ]
162+
163+type VS = 'Versioned SchemaExample '[ TestMigration ]
164+
165+schemaJsonTopVersion :: ByteString
166+schemaJsonTopVersion = "{ \"foo\": 42, \"bar\": \"bar\" }"
167+```
168+
169+It's possible to decode the latest version like this:
170+
171+```
172+decodeAndValidateJson schemaJsonTopVersion :: ParseResult (JsonRepr (TopVersion (AllVersions VS)))
173+```
174+
175+It's important to differentiate between schema migrations and data migrations.
176+Schema migration is a change of a schema acceptable by a JSON consumer. It transforms one schema to another.
177+Data migrations on the other hand are functions on the data itself. They transform values
178+acceptable by one schema to values acceptable by another.
179+Let's look at the situation when we have to add a field to a JSON Object of a current schema:
180+
181+```haskell
182+type SchemaExample = 'SchemaObject
183+ '[ '("foo", 'SchemaArray '[ 'AEq 1] ('SchemaNumber '[ 'NGt 10]))
184+ , '("bar", 'SchemaOptional ('SchemaText '[ 'TEnum '["foo", "bar"]]))]
185+
186+jsonExample :: JsonRepr SchemaExample
187+jsonExample = withRepr @SchemaExample
188+ $ field @"bar" (Just "bar")
189+ :& field @"foo" [12]
190+ :& RNil
191+
192+type AddQuuz =
193+ 'Migration "add_field_quuz"
194+ '[ 'Diff '[] ('AddKey "quuz" (SchemaNumber '[])) ]
195+
196+type DeleteQuuz =
197+ 'Migration "remove_field_quuz"
198+ '[ 'Diff '[] ( 'DeleteKey "quuz") ]
199+
200+type Migrations = '[ AddQuuz
201+ , DeleteQuuz ]
202+
203+type VersionedJson = 'Versioned SchemaExample Migrations
204+
205+migrationList :: MigrationList Identity VersionedJson
206+migrationList
207+ = (migrateObject (\r -> Identity $ field @"quuz" 42 :& r))
208+ :&& shrinkObject
209+ :&& MNil
210+
211+```
212+
213+In this instance `Migrations` is a list of schema migrations and
214+`MigrationList Identity VersionedJson` is a list of data migrations corresponding
215+to the list of schema migrations: `migrateObject (\r -> Identity $ field @"quuz" 42 :& r))`
216+will be used at runtime to transform `JsonRepr SchemaExample` to
217+`JsonRepr (SchemaByRevision "add_quuz" VersionedJson). `Identity` in the type of
218+`MigrationList` is a monad we choose to run our migrations in. If there's need to
219+do database queries or something like that, it can be changed to something more
220+appropriate by a user.
221+`migrateObject` takes a function transforming old fields into new ones, `shrinkObject`
222+allows to shrink the JSON object in case migration only removed fields.
223+
224+## How do I construct a value of `JsonRepr schema`?
225+
226+`JsonRepr schema` is a primary representation of a value serializable/deserializable
227+to JSON, but with a twist. It's guaranteed to correspond a type-level schema,
228+it's a type parameter of a same name.
229+It makes constructing it a little bit more involved, but luckily `schematic`
230+provides a DSL for doing so in a more straightforward fashion. An example would
231+look like this:
232+
233+```haskell
234+type SchemaExample = 'SchemaObject
235+ '[ '("foo", SchemaArray '[ AEq 1] (SchemaNumber '[NGt 10]))
236+ , '("bar", SchemaOptional (SchemaText '[TEnum '["foo", "bar"]]))]
237+
238+jsonExample = withRepr @SchemaExample
239+ $ field @"bar" (Just "bar")
240+ :& field @"foo" [12]
241+ :& RNil
242+```
243+
244+`@foo` syntax is an explicit type application, which is a feature of GHC 8+, it
245+makes type inference possible without relying on a bunch of `Proxy`s, which
246+makes it syntactically more terse.
247+
248+[GHC Type Applications](https://ghc.haskell.org/trac/ghc/wiki/TypeApplication)
249+
250+`schematic` provides instances for `OverloadedLists` and `OverloadedStrings`
251+GHC extensions to make use of string and list literals for values in a previous
252+example.
253+
254+
255+## Export to json-schema (draft 4)
releasenew file+43
@@ -0,0 +1,43 @@
1+#!/bin/bash
2+
3+set -o xtrace
4+
5+dist=`stack path --dist-dir --stack-yaml ./stack.yaml 2> /dev/null`
6+
7+rootdir=`pwd`
8+
9+cabalfile=`ls *.cabal`
10+packagename="${cabalfile%%.*}"
11+version=`grep '^version:' schematic.cabal | rev | cut -d" " -f1 | rev`
12+
13+echo -e "\033[1;36mTesting library...\033[0m"
14+stack test 2> /dev/null
15+
16+echo -e "\033[1;36mRunning sdist...\033[0m"
17+cabal sdist
18+
19+echo -e "\033[1;36mGenerating documentation...\033[0m"
20+stack haddock 2> /dev/null
21+
22+if [ "$?" -eq "0" ]; then
23+ echo -e "\033[1;32mUploading package to Hackage...\033[0m"
24+ read -p "Hackage username: " username
25+ read -p "Hackage password: " -s password
26+ echo ""
27+ cabal upload -u $username -p $password dist/$packagename-$version.tar.gz
28+
29+ docdir=`find .stack-work -name "$packagename-$version-docs"`
30+
31+ echo -e "Compressing documentation from \033[1;34m$docdir\033[0m for \033[1;35m$packagename\033[0m-\033[1;33m$version\033[1;30m"
32+ tar -c -v -z --format=ustar -f $docdir.tar.gz $docdir
33+ echo -e "\033[1;32mUploading documentation to Hackage...\033[0m"
34+ cd $docdir
35+ cd ..
36+ curl -X PUT -H 'Content-Type: application/x-tar' -H 'Content-Encoding: gzip' --data-binary "$packagename-$version-docs.tar.gz" "https://$username:$password@hackage.haskell.org/package/$packagename-$version/candidate/docs"
37+ open "https://hackage.haskell.org/package/$packagename-$version/candidate/"
38+ cd $rootdir
39+ echo "To publish the candidate, use 'cabal upload --publish'."
40+ exit $?
41+else
42+ echo -e "\033[1;31mNot in a stack-powered project\033[0m"
43+fi
release.nixnew file+32
@@ -0,0 +1,32 @@
1+{ schematicSrc ? { outPath = ./.; revCount = 0; gitTag = "dirty"; }
2+, supportedSystems ? [ "x86_64-linux" ]
3+}:
4+
5+let
6+ _nixpkgs = import <nixpkgs> {};
7+ inherit (_nixpkgs) pkgs lib;
8+
9+ stackageOverlayPath = pkgs.fetchFromGitHub {
10+ owner = "typeable";
11+ repo = "nixpkgs-stackage";
12+ rev = "abe0a03ba2bde609b0707ce45301ec836cb3ed29";
13+ sha256 = "0ksdk83zbsgvs30izwsfyjh4xxwz8dsn9a5igrs3pjap4whpzqfv";
14+ };
15+
16+ nixpkgsArgs = {
17+ overlays = [ (import stackageOverlayPath) ];
18+ };
19+
20+ release = import <nixpkgs/pkgs/top-level/release-lib.nix> { inherit nixpkgsArgs supportedSystems; };
21+
22+ mkStackage = system:
23+ let
24+ nixpkgs = release.pkgsFor system;
25+ stackage = nixpkgs.haskell.packages.stackage.lib.callStackage2nix "schematic" schematicSrc { inherit nixpkgs; };
26+ in
27+ stackage;
28+
29+in
30+ lib.genAttrs supportedSystems (system: {
31+ inherit (mkStackage system) schematic;
32+ })
schematic.cabal+65−37
@@ -1,15 +1,13 @@
1−-- Initial schematic.cabal generated by cabal init. For further
2−-- documentation, see http://haskell.org/cabal/users-guide/
3−
4name: schematic
1name: schematic
5−version: 0.1.0.0
2+version: 0.5.0.0
6synopsis: JSON-biased spec and validation tool
3synopsis: JSON-biased spec and validation tool
7−-- description:
4+description: JSON-biased spec and validation tool. Makes possible to have a schema as a haskell type and derive json instances, validation actions, JSON generation for property-test generically. Built-in lens support.
8license: BSD3
5license: BSD3
9license-file: LICENSE
6license-file: LICENSE
10author: Denis Redozubov
7author: Denis Redozubov
11maintainer: denis.redozubov@gmail.com
8maintainer: denis.redozubov@gmail.com
12−-- copyright:
9+homepage: http://github.com/typeable/schematic
10+Bug-reports: http://github.com/typeable/schematic/issues/
13category: Data
11category: Data
14build-type: Simple
12build-type: Simple
15extra-source-files: ChangeLog.md
13extra-source-files: ChangeLog.md
@@ -17,13 +15,30 @@ cabal-version: >=1.10
17
15
18library
16library
19 exposed-modules: Data.Schematic
17 exposed-modules: Data.Schematic
18+ , Data.Schematic.DSL
19+ , Data.Schematic.Generator
20+ , Data.Schematic.Generator.Regex
21+ , Data.Schematic.Instances
22+ , Data.Schematic.JsonSchema
23+ , Data.Schematic.Helpers
24+ , Data.Schematic.Lens
25+ , Data.Schematic.Migration
26+ , Data.Schematic.Path
20 , Data.Schematic.Schema
27 , Data.Schematic.Schema
28+ , Data.Schematic.Validation
29+ , Data.Schematic.Verifier
30+ , Data.Schematic.Verifier.Array
31+ , Data.Schematic.Verifier.Common
32+ , Data.Schematic.Verifier.Number
33+ , Data.Schematic.Verifier.Text
21− -- ghc-options:
34+ ghc-options: -Wall
22− -- other-modules:
23 default-extensions: ConstraintKinds
35 default-extensions: ConstraintKinds
24 , DataKinds
36 , DataKinds
37+ , DefaultSignatures
25 , DeriveFunctor
38 , DeriveFunctor
26 , DeriveFoldable
39 , DeriveFoldable
40+ , DeriveTraversable
41+ , DeriveGeneric
27 , DeriveDataTypeable
42 , DeriveDataTypeable
28 , FlexibleContexts
43 , FlexibleContexts
29 , FlexibleInstances
44 , FlexibleInstances
@@ -31,22 +46,44 @@ library
31 , GADTs
46 , GADTs
32 , KindSignatures
47 , KindSignatures
33 , InstanceSigs
48 , InstanceSigs
49+ , LambdaCase
34 , MultiParamTypeClasses
50 , MultiParamTypeClasses
51+ , OverloadedLists
35 , OverloadedStrings
52 , OverloadedStrings
36 , PolyKinds
53 , PolyKinds
37 , QuasiQuotes
54 , QuasiQuotes
38 , PartialTypeSignatures
55 , PartialTypeSignatures
56+ , RankNTypes
39 , RecordWildCards
57 , RecordWildCards
58+ , StandaloneDeriving
40 , ScopedTypeVariables
59 , ScopedTypeVariables
41 , TemplateHaskell
60 , TemplateHaskell
42 , TypeApplications
61 , TypeApplications
43 , TypeFamilies
62 , TypeFamilies
63+ , TypeFamilyDependencies
44 , TypeInType
64 , TypeInType
45 , TypeOperators
65 , TypeOperators
46 , TypeSynonymInstances
66 , TypeSynonymInstances
67+ , UndecidableInstances
47− build-depends: base >=4.9 && <4.10
68+ build-depends: base >=4.11 && <4.13
69+ , bytestring
70+ , aeson >= 1
71+ , containers
72+ , hjsonschema
73+ , mtl
74+ , profunctors
75+ , regex-tdfa
48− , regex-compat
76+ , regex-tdfa-text
77+ , scientific
78+ , singletons >= 2.4
79+ , smallcheck
80+ , tagged
81+ , template-haskell
49 , text
82 , text
83+ , union
84+ , unordered-containers
85+ , validationt >= 0.2.1.0
86+ , vector
50 , vinyl
87 , vinyl
51 hs-source-dirs: src
88 hs-source-dirs: src
52 default-language: Haskell2010
89 default-language: Haskell2010
@@ -56,37 +93,28 @@ test-suite spec
56 hs-source-dirs: test
93 hs-source-dirs: test
57 main-is: Spec.hs
94 main-is: Spec.hs
58 default-language: Haskell2010
95 default-language: Haskell2010
59− default-extensions: ConstraintKinds
60− , DataKinds
61− , DeriveFunctor
62− , DeriveFoldable
63− , DeriveDataTypeable
64− , FlexibleContexts
65− , FlexibleInstances
66− , FunctionalDependencies
67− , GADTs
68− , KindSignatures
69− , InstanceSigs
70− , MultiParamTypeClasses
71− , OverloadedStrings
72− , PolyKinds
73− , QuasiQuotes
74− , PartialTypeSignatures
75− , RecordWildCards
76− , ScopedTypeVariables
77− , TemplateHaskell
78− , TypeApplications
79− , TypeFamilies
80− , TypeInType
81− , TypeOperators
82− , TypeSynonymInstances
83 build-depends: HUnit
96 build-depends: HUnit
97+ , aeson >= 1
84− , base >=4.9 && <4.10
98+ , base >=4.11 && <4.13
99+ , bytestring
100+ , containers
101+ , hjsonschema
85 , hspec >= 2.2.0
102 , hspec >= 2.2.0
86 , hspec-core
103 , hspec-core
87 , hspec-discover
104 , hspec-discover
105+ , hspec-smallcheck
106+ , lens
88− , regex-compat
107+ , regex-tdfa
108+ , regex-tdfa-text
89 , schematic
109 , schematic
110+ , smallcheck
111+ , singletons
112+ , tagged
90 , text
113 , text
114+ , unordered-containers
115+ , validationt >= 0.2.1.0
91 , vinyl
116 , vinyl
92− other-modules: SchemaSpec
117+ other-modules: SchemaSpec
118+ , HelpersSpec
119+ , LensSpec
120+ , JsonSchemaSpec
src/Data/Schematic.hs+103−1
@@ -1 +1,103 @@
1+{-# OPTIONS -fprint-explicit-kinds #-}
2+{-# LANGUAGE AllowAmbiguousTypes #-}
3+
1−module Data.Schematic where
4+module Data.Schematic
5+ ( module Data.Schematic.JsonSchema
6+ , module Data.Schematic.Helpers
7+ , module Data.Schematic.Lens
8+ , module Data.Schematic.Migration
9+ , module Data.Schematic.Schema
10+ , decodeAndValidateJson
11+ , parseAndValidateJson
12+ , parseAndValidateJsonBy
13+ , parseAndValidateTopVersionJson
14+ , parseAndValidateWithMList
15+ , decodeAndValidateVersionedWithMList
16+ , decodeAndValidateVersionedWithPureMList
17+ , isValid
18+ , isDecodingError
19+ , isValidationError
20+ , ParseResult(..)
21+ , withRepr
22+ , field
23+ ) where
24+
25+import Control.Monad.Validation
26+import Data.Aeson as J
27+import Data.Aeson.Types as J
28+import Data.ByteString.Lazy as BL
29+import Data.Functor.Identity as F
30+import Data.Schematic.DSL
31+import Data.Schematic.Helpers
32+import Data.Schematic.JsonSchema
33+import Data.Schematic.Lens
34+import Data.Schematic.Migration
35+import Data.Schematic.Schema
36+import Data.Schematic.Validation
37+import Data.Singletons.Prelude hiding ((:.))
38+import Data.Tagged
39+import Data.Text as T
40+
41+
42+parseAndValidateTopVersionJson
43+ :: forall proxy (v :: Versioned)
44+ . (SingI (TopVersion (AllVersions v)))
45+ => proxy v
46+ -> J.Value
47+ -> ParseResult (JsonRepr (TopVersion (AllVersions v)))
48+parseAndValidateTopVersionJson _ v =
49+ case parseEither parseJSON v of
50+ Left s -> DecodingError $ T.pack s
51+ Right jsonRepr ->
52+ let
53+ validate =
54+ validateJsonRepr (sing :: Sing (TopVersion (AllVersions v))) [] jsonRepr
55+ res = runIdentity . runValidationTEither $ validate
56+ in case res of
57+ Left em -> ValidationError em
58+ Right () -> Valid jsonRepr
59+
60+parseAndValidateWithMList
61+ :: Monad m
62+ => MList m revisions
63+ -> J.Value
64+ -> m (ParseResult (JsonRepr (Head revisions)))
65+parseAndValidateWithMList MNil v = pure $ parseAndValidateJson v
66+parseAndValidateWithMList (Tagged f :&& tl) v =
67+ case parseAndValidateJsonBy Proxy v of
68+ Valid a -> pure $ Valid a
69+ DecodingError _ -> do
70+ pr <- parseAndValidateWithMList tl v
71+ let pr' = f <$> pr
72+ sequence pr'
73+ ValidationError _ -> do
74+ pr <- parseAndValidateWithMList tl v
75+ let pr' = f <$> pr
76+ sequence pr'
77+
78+decodeAndValidateJson
79+ :: forall schema
80+ . (J.FromJSON (JsonRepr schema), TopLevel schema, SingI schema)
81+ => BL.ByteString
82+ -> ParseResult (JsonRepr schema)
83+decodeAndValidateJson bs = case decode bs of
84+ Nothing -> DecodingError "malformed json"
85+ Just x -> parseAndValidateJson x
86+
87+decodeAndValidateVersionedWithMList
88+ :: Monad m
89+ => proxy versioned
90+ -> MList m (MapSnd (AllVersions versioned))
91+ -> BL.ByteString
92+ -> m (ParseResult (JsonRepr (Head (MapSnd (AllVersions versioned)))))
93+decodeAndValidateVersionedWithMList _ mlist bs = case decode bs of
94+ Nothing -> pure $ DecodingError "malformed json"
95+ Just x -> parseAndValidateWithMList mlist x
96+
97+decodeAndValidateVersionedWithPureMList
98+ :: proxy versioned
99+ -> MList F.Identity (MapSnd (AllVersions versioned))
100+ -> BL.ByteString
101+ -> ParseResult (JsonRepr (Head (MapSnd (AllVersions versioned))))
102+decodeAndValidateVersionedWithPureMList a b c =
103+ runIdentity $ decodeAndValidateVersionedWithMList a b c
src/Data/Schematic/DSL.hsnew file+92
@@ -0,0 +1,92 @@
1+{-# LANGUAGE AllowAmbiguousTypes #-}
2+{-# LANGUAGE CPP #-}
3+
4+module Data.Schematic.DSL where
5+
6+import Data.Kind
7+import Data.Schematic.Lens
8+import Data.Schematic.Schema
9+import Data.Scientific
10+import Data.Singletons
11+import Data.Singletons.Prelude hiding ((:.))
12+import Data.Singletons.TypeLits
13+import Data.Tagged
14+import Data.Text as T
15+import Data.Union
16+import qualified Data.Vector as V
17+import Data.Vinyl
18+import Data.Vinyl.Functor
19+
20+
21+#if MIN_VERSION_base(4,12,0)
22+type Constructor a
23+ = forall fields b
24+ . (fields ~ FieldsOf a, FSubset fields b (FImage fields b), RMap fields)
25+ => Rec (Tagged fields :. FieldRepr) b
26+ -> JsonRepr ('SchemaObject fields)
27+#else
28+type Constructor a
29+ = forall fields b
30+ . (fields ~ FieldsOf a, FSubset fields b (FImage fields b))
31+ => Rec (Tagged fields :. FieldRepr) b
32+ -> JsonRepr ('SchemaObject fields)
33+#endif
34+withRepr :: Constructor a
35+withRepr = ReprObject . rmap (unTagged . getCompose) . fcast
36+
37+class Representable s where
38+ constructField :: Sing fn -> Proxy s -> Repr s -> FieldRepr '(fn, s)
39+
40+instance SingI so => Representable ('SchemaObject so) where
41+ constructField sfn _ o = withKnownSymbol sfn $ FieldRepr $ ReprObject o
42+
43+instance (SingI cs, SingI sa) => Representable ('SchemaArray cs sa) where
44+ constructField sfn _ a = withKnownSymbol sfn $ FieldRepr $ ReprArray a
45+
46+instance SingI cs => Representable ('SchemaText cs) where
47+ constructField sfn _ t = withKnownSymbol sfn $ FieldRepr $ ReprText t
48+
49+instance SingI cs => Representable ('SchemaNumber cs) where
50+ constructField sfn _ n = withKnownSymbol sfn $ FieldRepr $ ReprNumber n
51+
52+instance Representable 'SchemaBoolean where
53+ constructField sfn _ b = withKnownSymbol sfn $ FieldRepr $ ReprBoolean b
54+
55+instance SingI so => Representable ('SchemaOptional so) where
56+ constructField sfn _ o = withKnownSymbol sfn $ FieldRepr $ ReprOptional o
57+
58+instance SingI (h ': tl) => Representable ('SchemaUnion (h ': tl)) where
59+ constructField sfn _ u = withKnownSymbol sfn $ FieldRepr $ ReprUnion u
60+
61+construct :: Sing s -> Repr s -> JsonRepr s
62+construct s r = case s of
63+ SSchemaObject _ -> ReprObject r
64+ SSchemaArray _ _ -> ReprArray r
65+ SSchemaText _ -> ReprText r
66+ SSchemaNumber _ -> ReprNumber r
67+ SSchemaBoolean -> ReprBoolean r
68+ SSchemaOptional _ -> ReprOptional r
69+ SSchemaNull -> ReprNull
70+ SSchemaUnion ss -> case ss of
71+ SNil -> error "unconstructable union"
72+ SCons _ _ -> ReprUnion r
73+
74+type family FieldsOf (s :: Schema) :: [(Symbol, Schema)] where
75+ FieldsOf ('SchemaObject fs) = fs
76+
77+type FieldConstructor fn =
78+ forall byField fs. (byField ~ ByField fn fs (FIndex fn fs), Representable byField)
79+ => Repr byField
80+ -> (Tagged fs :. FieldRepr) '(fn, byField)
81+
82+field :: forall fn. KnownSymbol fn => FieldConstructor fn
83+field = Compose . Tagged . constructField (sing :: Sing fn) Proxy
84+
85+type family Repr (s :: Schema) = (ty :: Type) where
86+ Repr ('SchemaObject so) = Rec FieldRepr so
87+ Repr ('SchemaArray cs sa) = V.Vector (JsonRepr sa)
88+ Repr ('SchemaText cs) = Text
89+ Repr ('SchemaNumber cs) = Scientific
90+ Repr 'SchemaBoolean = Bool
91+ Repr ('SchemaOptional so) = Maybe (JsonRepr so)
92+ Repr ('SchemaUnion (h ': tl)) = Union JsonRepr (h ': tl)
src/Data/Schematic/Generator.hsnew file+91
@@ -0,0 +1,91 @@
1+module Data.Schematic.Generator where
2+
3+import Data.Maybe
4+import Data.Schematic.Generator.Regex
5+import {-# SOURCE #-} Data.Schematic.Schema
6+import Data.Schematic.Verifier
7+import Data.Scientific
8+import Data.Text (Text, pack)
9+import qualified Data.Vector as V
10+import Test.SmallCheck.Series
11+
12+maxHigh :: Int
13+maxHigh = 30
14+
15+minLow :: Int
16+minLow = 2
17+
18+textLengthSeries :: Monad m => [VerifiedTextConstraint] -> Series m Text
19+textLengthSeries =
20+ \case
21+ [VTEq eq] -> pure $ pack $ take (fromIntegral eq) $ cycle "sample"
22+ [VTBounds ml mh] -> do
23+ let
24+ l = fromMaybe minLow (fromIntegral <$> ml) + 1
25+ h = fromMaybe maxHigh (fromIntegral <$> mh) - 1
26+ n <- generate $ \depth -> take depth [l .. h]
27+ pure $ pack $ take (fromIntegral n) $ cycle "sample"
28+ _ -> pure "error"
29+
30+textEnumSeries :: Monad m => [Text] -> Series m Text
31+textEnumSeries enum = generate $ \depth -> take depth enum
32+
33+textSeries :: Monad m => [DemotedTextConstraint] -> Series m Text
34+textSeries cs = do
35+ let mvcs = verifyTextConstraints cs
36+ case mvcs of
37+ Just vcs -> do
38+ n <- textSeries' vcs
39+ pure n
40+ Nothing -> pure "error"
41+
42+textSeries' :: Monad m => [VerifiedTextConstraint] -> Series m Text
43+textSeries' [] = pure "sample"
44+textSeries' vcs = do
45+ let enums = listToMaybe [x | VTEnum x <- vcs]
46+ case enums of
47+ Just e -> textEnumSeries e
48+ Nothing -> do
49+ let regexps = listToMaybe [x | VTRegex x _ _ <- vcs]
50+ case regexps of
51+ Just e -> regexSeries e
52+ Nothing -> textLengthSeries vcs
53+
54+numberSeries :: Monad m => [DemotedNumberConstraint] -> Series m Scientific
55+numberSeries cs = do
56+ let mvcs = verifyNumberConstraints cs
57+ case mvcs of
58+ Just vcs -> do
59+ n <- numberSeries' vcs
60+ pure $ n
61+ Nothing -> pure 0
62+
63+numberSeries' :: Monad m => VerifiedNumberConstraint -> Series m Scientific
64+numberSeries' =
65+ \case
66+ VNEq eq -> pure $ fromIntegral eq
67+ VNBounds ml mh -> do
68+ let l = fromMaybe minLow (fromIntegral <$> ml) + 1
69+ h = fromMaybe maxHigh (fromIntegral <$> mh) - 1
70+ n <- generate $ \depth -> take depth [l .. h]
71+ pure $ fromIntegral n
72+
73+arraySeries
74+ :: (Monad m, Serial m (JsonRepr s))
75+ => [DemotedArrayConstraint]
76+ -> Series m (V.Vector (JsonRepr s))
77+arraySeries cs = do
78+ let mvcs = verifyArrayConstraint cs
79+ case mvcs of
80+ Just vcs -> arraySeries' vcs
81+ Nothing -> pure V.empty
82+
83+arraySeries'
84+ :: forall m s. (Monad m, Serial m (JsonRepr s))
85+ => Maybe VerifiedArrayConstraint
86+ -> Series m (V.Vector (JsonRepr s))
87+arraySeries' ml = do
88+ objs <- V.replicateM (maybe minRepeat f ml) (series :: Series m (JsonRepr s))
89+ pure $ objs
90+ where
91+ f (VAEq l) = fromIntegral l
src/Data/Schematic/Generator/Regex.hsnew file+76
@@ -0,0 +1,76 @@
1+module Data.Schematic.Generator.Regex where
2+
3+import Control.Monad
4+import Data.List
5+import Data.Maybe
6+import qualified Data.Set as S
7+import Data.Text (Text, unpack)
8+import Data.Text.Lazy (toStrict)
9+import Data.Text.Lazy.Builder (Builder, singleton, toLazyText)
10+import Test.SmallCheck.Series
11+import Text.Regex.TDFA.Pattern
12+import Text.Regex.TDFA.ReadRegex (parseRegex)
13+
14+
15+minRepeat :: Int
16+minRepeat = 2
17+
18+maxRepeat :: Int
19+maxRepeat = 10
20+
21+regexSeries :: (Monad m) => Text -> Series m Text
22+regexSeries regexp =
23+ case parseRegex . unpack $ regexp of
24+ Right (p, _) -> toStrict . toLazyText <$> regexSeries' p
25+ Left _ -> pure ""
26+
27+regexSeries' :: (Monad m) => Pattern -> Series m Builder
28+regexSeries' pt =
29+ case pt of
30+ PEmpty -> pure mempty
31+ PChar {..} -> pure $ singleton getPatternChar
32+ PAny {getPatternSet = PatternSet (Just cset) _ _ _} -> do
33+ x <- generate $ \depth -> take depth $ S.toList cset
34+ pure $ singleton x
35+ PAnyNot {getPatternSet = PatternSet (Just cset) _ _ _} -> do
36+ x <-
37+ generate $ \depth ->
38+ take depth $ notChars $ concatMap expandEscape $ S.toList cset
39+ pure $ singleton x
40+ PQuest p -> regexSeries' p \/ pure mempty
41+ PPlus p -> regexSeries' $ PBound 1 Nothing p
42+ PStar _ p -> regexSeries' $ PBound 0 Nothing p
43+ PBound low mhigh p -> do
44+ let high = fromMaybe (low + maxRepeat) mhigh
45+ n <- generate $ \depth -> take depth [low .. high]
46+ decDepth $ do
47+ ps <- replicateM n $ regexSeries' p
48+ pure $ mconcat ps
49+ PConcat ps -> mconcat <$> mapM regexSeries' ps
50+ POr xs -> regexSeries' =<< (generate $ \depth -> take depth xs)
51+ PDot _ -> do
52+ x <- generate $ \depth -> take depth $ notChars []
53+ pure $ singleton x
54+ PEscape {..} -> do
55+ x <- generate $ \depth -> take depth $ expandEscape getPatternChar
56+ pure $ singleton x
57+ PCarat _ -> pure mempty
58+ PDollar _ -> pure mempty
59+ _ -> pure mempty
60+ where
61+ notChars = ([' ' .. '~'] \\)
62+ expandEscape ch =
63+ case ch of
64+ 'n' -> "\n"
65+ 't' -> "\t"
66+ 'r' -> "\r"
67+ 'f' -> "\f"
68+ 'a' -> "\a"
69+ 'e' -> "\ESC"
70+ 'd' -> ['0' .. '9']
71+ 'w' -> ['0' .. '9'] ++ '_' : ['a' .. 'z'] ++ ['A' .. 'Z']
72+ 's' -> "\9\32"
73+ 'D' -> notChars $ ['0' .. '9']
74+ 'W' -> notChars $ ['0' .. '9'] ++ '_' : ['a' .. 'z'] ++ ['A' .. 'Z']
75+ 'S' -> notChars "\9\32"
76+ ch' -> [ch']
src/Data/Schematic/Helpers.hsnew file+59
@@ -0,0 +1,59 @@
1+module Data.Schematic.Helpers where
2+
3+import Data.Schematic.Schema
4+import GHC.TypeLits
5+
6+
7+type UUIDRegex =
8+ 'TRegex "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}"
9+
10+type IsUUID = '[UUIDRegex]
11+
12+-- [ "1985-04-12T23:20:50.52Z"
13+-- , "1996-12-19T16:39:57-08:00"
14+-- , "1990-12-31T23:59:60Z"
15+-- , "1990-12-31T15:59:60-08:00"
16+-- , "1937-01-01T12:00:27.87+00:20"
17+-- ]
18+
19+-- components
20+type ISO8601Date = "[1-9][0-9]{3}-(0[1-9]|1[0-2])-([0-2][0-9]|3[0-1])"
21+
22+type ISO8601Time = "([0-1][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]"
23+
24+type ISO8601DateTime =
25+ AppendSymbol
26+ ISO8601Date
27+ (AppendSymbol "(T" (AppendSymbol ISO8601Time ")?"))
28+
29+type ISO8601UTC = "(Z|\\+00:00)"
30+
31+type ISO8601DateTimeUTC =
32+ AppendSymbol ISO8601Date (AppendSymbol "T" (AppendSymbol ISO8601Time ISO8601UTC))
33+
34+type ISO8601TZ = "\\+[0-1][0-9]:[0-6][0-9]"
35+
36+type ISO8601DateTimeZoned =
37+ AppendSymbol ISO8601Date (AppendSymbol "T" (AppendSymbol ISO8601Time ISO8601TZ))
38+
39+-- regexes
40+type ISO8601DateRegex = 'TRegex ISO8601Date
41+
42+type ISO8601TimeRegex = 'TRegex ISO8601Time
43+
44+type ISO8601DateTimeRegex = 'TRegex ISO8601DateTime
45+
46+type ISO8601DateTimeRegexUTC = 'TRegex ISO8601DateTimeUTC
47+
48+type ISO8601DateTimeRegexZoned = 'TRegex ISO8601DateTimeZoned
49+
50+-- constraints
51+type IsDate = '[ISO8601DateRegex]
52+
53+type IsTime = '[ISO8601TimeRegex]
54+
55+type IsDateTime = '[ISO8601DateTimeRegex]
56+
57+type IsZonedDateTime = '[ISO8601DateTimeRegexZoned]
58+
59+type IsUTCDateTime = '[ISO8601DateTimeRegexUTC]
src/Data/Schematic/Instances.hsnew file+27
@@ -0,0 +1,27 @@
1+{-# LANGUAGE AllowAmbiguousTypes #-}
2+{-# OPTIONS_GHC -fno-warn-orphans #-}
3+
4+module Data.Schematic.Instances where
5+
6+import Data.Scientific
7+import Data.Text (Text, pack)
8+import Data.Vector as V
9+import Data.Vinyl
10+import Test.SmallCheck.Series
11+
12+
13+instance Monad m => Serial m (Rec f '[]) where
14+ series = cons0 RNil
15+
16+instance (Serial m (f a), Serial m (Rec f as), Monad m)
17+ => Serial m (Rec f (a ': as)) where
18+ series = cons2 (:&)
19+
20+instance Serial m a => Serial m (V.Vector a) where
21+ series = V.fromList <$> series
22+
23+instance Monad m => Serial m Scientific where
24+ series = scientific <$> series <*> series
25+
26+instance Monad m => Serial m Text where
27+ series = pack <$> series
src/Data/Schematic/JsonSchema.hsnew file+124
@@ -0,0 +1,124 @@
1+{-# LANGUAGE AllowAmbiguousTypes #-}
2+{-# LANGUAGE RecordWildCards #-}
3+{-# LANGUAGE OverloadedLabels #-}
4+{-# LANGUAGE TemplateHaskell #-}
5+
6+module Data.Schematic.JsonSchema
7+ ( toJsonSchema
8+ , toJsonSchema'
9+ ) where
10+
11+import Control.Monad.State.Strict
12+import Data.Aeson as J
13+import Data.Foldable as F
14+import Data.HashMap.Strict as H
15+import Data.List as L
16+import Data.List.NonEmpty as NE
17+import Data.Schematic.Schema as S
18+import Data.Set as Set
19+import Data.Singletons
20+import Data.Text
21+import Data.Traversable
22+import JSONSchema.Draft4.Schema as D4
23+import JSONSchema.Validator.Draft4 as D4
24+
25+
26+draft4 :: Text
27+draft4 = "http://json-schema.org/draft-04/schema#"
28+
29+textConstraint :: DemotedTextConstraint -> State D4.Schema ()
30+textConstraint (DTEq n) = modify $ \s -> s
31+ { _schemaMinLength = pure $ fromIntegral n
32+ , _schemaMaxLength = pure $ fromIntegral n }
33+textConstraint (DTLe n) = modify $ \s -> s
34+ { _schemaMaxLength = pure . fromIntegral $ n }
35+textConstraint (DTLt n) =
36+ let n' = if n == 0 then 0 else n - 1
37+ in modify $ \s -> s { _schemaMaxLength = pure . fromIntegral $ n' }
38+textConstraint (DTGt n) = modify $ \s -> s
39+ { _schemaMinLength = pure . fromIntegral $ n + 1 }
40+textConstraint (DTGe n) = modify $ \s -> s
41+ { _schemaMinLength = pure . fromIntegral $ n }
42+textConstraint (DTRegex r) = modify $ \s -> s { _schemaPattern = pure r }
43+textConstraint (DTEnum ss) =
44+ let ss' = if F.length ss == 0 then [] else NE.fromList $ J.String <$> ss
45+ in modify $ \s -> s { _schemaEnum = pure ss' }
46+
47+numberConstraint :: DemotedNumberConstraint -> State D4.Schema ()
48+numberConstraint (DNLe n) = modify $ \s -> s
49+ { _schemaMaximum = pure . fromIntegral $ n }
50+numberConstraint (DNLt n) = modify $ \s -> s
51+ { _schemaMaximum = pure . fromIntegral $ n
52+ , _schemaExclusiveMaximum = pure True }
53+numberConstraint (DNGt n) = modify $ \s -> s
54+ { _schemaMinimum = pure . fromIntegral $ n
55+ , _schemaExclusiveMinimum = pure True }
56+numberConstraint (DNGe n) = modify $ \s -> s
57+ { _schemaMinimum = pure . fromIntegral $ n }
58+numberConstraint (DNEq n) = modify $ \s -> s
59+ { _schemaMinimum = pure $ fromIntegral n
60+ , _schemaMaximum = pure $ fromIntegral n }
61+
62+arrayConstraint :: DemotedArrayConstraint -> State D4.Schema ()
63+arrayConstraint (DALe n) = modify $ \s -> s
64+ { _schemaMaxItems = pure . fromIntegral $ n }
65+arrayConstraint (DALt n) =
66+ let n' = if n == 0 then 0 else n - 1
67+ in modify $ \s -> s { _schemaMaxItems = pure . fromIntegral $ n' }
68+arrayConstraint (DAGt n) = modify $ \s -> s
69+ { _schemaMinItems = pure . fromIntegral $ n + 1 }
70+arrayConstraint (DAGe n) = modify $ \s -> s
71+ { _schemaMinItems = pure . fromIntegral $ n }
72+arrayConstraint (DAEq n) = modify $ \s -> s
73+ { _schemaMinItems = pure $ fromIntegral n
74+ , _schemaMaxItems = pure $ fromIntegral n }
75+
76+toJsonSchema
77+ :: forall proxy schema
78+ . SingI schema
79+ => proxy (schema :: S.Schema)
80+ -> Maybe D4.Schema
81+toJsonSchema _ = do
82+ js <- toJsonSchema' $ fromSing (sing :: Sing schema)
83+ pure $ js { _schemaVersion = pure draft4 }
84+
85+toJsonSchema'
86+ :: DemotedSchema
87+ -> Maybe D4.Schema
88+toJsonSchema' = \case
89+ DSchemaText tcs ->
90+ pure $ execState (traverse_ textConstraint tcs) $ emptySchema
91+ { _schemaType = pure $ TypeValidatorString D4.SchemaString }
92+ DSchemaNumber ncs ->
93+ pure $ execState (traverse_ numberConstraint ncs) $ emptySchema
94+ { _schemaType = pure $ TypeValidatorString D4.SchemaNumber }
95+ DSchemaBoolean -> pure $ emptySchema
96+ { _schemaType = pure $ TypeValidatorString D4.SchemaBoolean }
97+ DSchemaObject objs -> do
98+ res <- for objs $ \(n,s) -> do
99+ s' <- toJsonSchema' s
100+ pure (n, s')
101+ let
102+ nonOpt = \case
103+ (_, DSchemaOptional _) -> False
104+ _ -> True
105+ pure $ emptySchema
106+ { _schemaType = pure $ TypeValidatorString D4.SchemaObject
107+ , _schemaRequired = pure $ Set.fromList $ fst <$> L.filter nonOpt objs
108+ , _schemaProperties = pure $ H.fromList res }
109+ DSchemaArray acs sch -> do
110+ res <- toJsonSchema' sch
111+ pure $ execState (traverse_ arrayConstraint acs) $ emptySchema
112+ { _schemaType = pure $ TypeValidatorString D4.SchemaArray
113+ , _schemaItems = pure $ ItemsObject res }
114+ DSchemaNull -> pure $ emptySchema
115+ { _schemaType = pure $ TypeValidatorString D4.SchemaNull }
116+ DSchemaOptional sch -> do
117+ snull <- toJsonSchema' DSchemaNull
118+ sres <- toJsonSchema' sch
119+ pure $ emptySchema { _schemaOneOf = pure (snull :| [sres]) }
120+ DSchemaUnion sch -> do
121+ schemaUnion <- traverse toJsonSchema' sch >>= \case
122+ [] -> Nothing
123+ x -> Just x
124+ pure $ emptySchema { _schemaAnyOf = pure $ NE.fromList schemaUnion }
src/Data/Schematic/Lens.hsnew file+207
@@ -0,0 +1,207 @@
1+{-# LANGUAGE UndecidableSuperClasses #-}
2+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
3+{-# LANGUAGE AllowAmbiguousTypes #-}
4+{-# LANGUAGE InstanceSigs #-}
5+
6+module Data.Schematic.Lens
7+ ( FIndex
8+ , FElem(..)
9+ , FImage
10+ , FSubset(..)
11+ , obj
12+ , arr
13+ , uni
14+ , txt
15+ , num
16+ , opt
17+ , bln
18+ , textRepr
19+ , numberRepr
20+ , boolRepr
21+ , arrayRepr
22+ , objectRepr
23+ , optionalRepr
24+ ) where
25+
26+import Data.Profunctor
27+import Data.Schematic.Schema
28+import Data.Scientific
29+import Data.Singletons
30+import Data.Text
31+import Data.Union
32+import Data.Vector as V
33+import Data.Vinyl
34+import Data.Vinyl.Functor
35+import Data.Vinyl.TypeLevel (Nat(..))
36+import GHC.TypeLits (Symbol, KnownSymbol)
37+
38+
39+-- | A partial relation that gives the index of a value in a list.
40+type family FIndex (r :: Symbol) (rs :: [(Symbol, Schema)]) :: Nat where
41+ FIndex r ( '(r, s) ': rs) = 'Z
42+ FIndex r ( s ': rs) = 'S (FIndex r rs)
43+
44+type Flens fn f g rs i
45+ = Functor g
46+ => (f '(fn, (ByField fn rs i)) -> g (f '(fn, (ByField fn rs i))))
47+ -> Rec f rs
48+ -> g (Rec f rs)
49+
50+type FGetter fn f rs i = Rec f rs -> f '(fn, (ByField fn rs i))
51+
52+class i ~ FIndex fn rs => FElem (fn :: Symbol) (rs :: [(Symbol, Schema)]) (i :: Nat) where
53+ type ByField fn rs i :: Schema
54+ flens :: Flens fn f g rs i
55+
56+ -- | For Vinyl users who are not using the @lens@ package, we provide a getter.
57+ fget :: FGetter fn f rs i
58+
59+ -- | For Vinyl users who are not using the @lens@ package, we also provide a
60+ -- setter. In general, it will be unambiguous what field is being written to,
61+ -- and so we do not take a proxy argument here.
62+ fput
63+ :: f '(fn, ByField fn rs i)
64+ -> Rec f rs
65+ -> Rec f rs
66+
67+instance FElem fn ('(fn, r) ': rs) 'Z where
68+ type ByField fn ('(fn, r) ': rs) 'Z = r
69+
70+ flens f (x :& xs) = fmap (:& xs) (f x)
71+ {-# INLINE flens #-}
72+
73+ fget = getConst . flens Const
74+ {-# INLINE fget #-}
75+
76+ fput y = getIdentity . flens (\_ -> Identity y)
77+ {-# INLINE fput #-}
78+
79+instance (FIndex r (s ': rs) ~ 'S i, FElem r rs i) => FElem r (s ': rs) ('S i) where
80+ type ByField r (s ': rs) ('S i) = ByField r rs i
81+
82+ flens f (x :& xs) = fmap (x :&) (flens f xs)
83+ {-# INLINE flens #-}
84+
85+ fget = getConst . flens Const
86+ {-# INLINE fget #-}
87+
88+ fput y = getIdentity . flens (\_ -> Identity y)
89+ {-# INLINE fput #-}
90+
91+-- This is an internal convenience helpers stolen from the @lens@ library.
92+lens
93+ :: Functor f
94+ => (t -> s)
95+ -> (t -> a -> b)
96+ -> (s -> f a)
97+ -> t
98+ -> f b
99+lens sa sbt afb s = fmap (sbt s) $ afb (sa s)
100+{-# INLINE lens #-}
101+
102+type Iso s t a b = forall p f. (Profunctor p, Functor f) => p a (f b) -> p s (f t)
103+
104+type Iso' s a = Iso s s a a
105+
106+iso
107+ :: (s -> a) -> (b -> t)
108+ -> Iso s t a b
109+iso sa bt = dimap sa (fmap bt)
110+{-# INLINE iso #-}
111+
112+-- | A partial relation that gives the indices of a sublist in a larger list.
113+type family FImage (rs :: [(Symbol, Schema)]) (ss :: [(Symbol, Schema)]) :: [Nat] where
114+ FImage '[] ss = '[]
115+ FImage ('(fn,s) ': rs) ss = FIndex fn ss ': FImage rs ss
116+
117+class is ~ FImage rs ss
118+ => FSubset (rs :: [(Symbol, Schema)]) (ss :: [(Symbol, Schema)]) is where
119+ -- | This is a lens into a slice of the larger record. Morally, we have:
120+ --
121+ -- > fsubset :: Lens' (Rec FieldRepr ss) (Rec FieldRepr rs)
122+ fsubset
123+ :: Functor g
124+ => (Rec f rs -> g (Rec f rs))
125+ -> Rec f ss
126+ -> g (Rec f ss)
127+
128+ -- | The getter of the 'fsubset' lens is 'fcast', which takes a larger record
129+ -- to a smaller one by forgetting fields.
130+ fcast
131+ :: Rec f ss
132+ -> Rec f rs
133+ fcast = getConst . fsubset Const
134+ {-# INLINE fcast #-}
135+
136+ -- | The setter of the 'fsubset' lens is 'freplace', which allows a slice of
137+ -- a record to be replaced with different values.
138+ freplace
139+ :: Rec f rs
140+ -> Rec f ss
141+ -> Rec f ss
142+ freplace rs = getIdentity . fsubset (\_ -> Identity rs)
143+ {-# INLINE freplace #-}
144+
145+instance FSubset '[] ss '[] where
146+ fsubset = lens (const RNil) const
147+
148+instance
149+ ( ByField fn ss i ~ s
150+ , FElem fn ss i
151+ , FSubset rs ss is) => FSubset ( '(fn,s) ': rs) ss (i ': is) where
152+ fsubset = lens (\ss -> fget @fn ss :& fcast ss) set
153+ where
154+ set :: Rec f ss -> Rec f ( '(fn,s) ': rs) -> Rec f ss
155+ set ss (r :& rs) = fput r $ freplace rs ss
156+
157+-- A bunch of @Iso@morphisms
158+textRepr
159+ :: (KnownSymbol fn, SingI cs)
160+ => Iso' (FieldRepr '(fn, ('SchemaText cs))) Text
161+textRepr = iso (\(FieldRepr (ReprText t)) -> t) (FieldRepr . ReprText)
162+
163+numberRepr
164+ :: (KnownSymbol fn, SingI cs)
165+ => Iso' (FieldRepr '(fn, ('SchemaNumber cs))) Scientific
166+numberRepr = iso (\(FieldRepr (ReprNumber n)) -> n) (FieldRepr . ReprNumber)
167+
168+boolRepr
169+ :: (KnownSymbol fn)
170+ => Iso' (FieldRepr '(fn, 'SchemaBoolean)) Bool
171+boolRepr = iso (\(FieldRepr (ReprBoolean b)) -> b) (FieldRepr . ReprBoolean)
172+
173+arrayRepr
174+ :: (KnownSymbol fn, SingI cs, SingI schema)
175+ => Iso' (FieldRepr '(fn, ('SchemaArray cs schema))) (V.Vector (JsonRepr schema))
176+arrayRepr = iso (\(FieldRepr (ReprArray a)) -> a) (FieldRepr . ReprArray)
177+
178+objectRepr
179+ :: (KnownSymbol fn, SingI fields)
180+ => Iso' (FieldRepr '(fn, ('SchemaObject fields))) (Rec FieldRepr fields)
181+objectRepr = iso (\(FieldRepr (ReprObject o)) -> o) (FieldRepr . ReprObject)
182+
183+optionalRepr
184+ :: (KnownSymbol fn, SingI schema)
185+ => Iso' (FieldRepr '(fn, ('SchemaOptional schema))) (Maybe (JsonRepr schema))
186+optionalRepr = iso (\(FieldRepr (ReprOptional r)) -> r) (FieldRepr . ReprOptional)
187+
188+obj :: Iso' (JsonRepr ('SchemaObject fields)) (Rec FieldRepr fields)
189+obj = iso (\(ReprObject r) -> r) ReprObject
190+
191+arr :: Iso' (JsonRepr ('SchemaArray cs schema)) (V.Vector (JsonRepr schema))
192+arr = iso (\(ReprArray r) -> r) ReprArray
193+
194+uni :: Iso' (JsonRepr ('SchemaUnion (h ': tl))) (Union JsonRepr (h ': tl))
195+uni = iso (\(ReprUnion u) -> u) ReprUnion
196+
197+txt :: Iso' (JsonRepr ('SchemaText cs)) Text
198+txt = iso (\(ReprText t) -> t) ReprText
199+
200+num :: Iso' (JsonRepr ('SchemaNumber cs)) Scientific
201+num = iso (\(ReprNumber t) -> t) ReprNumber
202+
203+bln :: Iso' (JsonRepr 'SchemaBoolean) Bool
204+bln = iso (\(ReprBoolean b) -> b) ReprBoolean
205+
206+opt :: Iso' (JsonRepr ('SchemaOptional schema)) (Maybe (JsonRepr schema))
207+opt = iso (\(ReprOptional o) -> o) ReprOptional
src/Data/Schematic/Migration.hsnew file+187
@@ -0,0 +1,187 @@
1+{-# LANGUAGE AllowAmbiguousTypes #-}
2+{-# LANGUAGE CPP #-}
3+{-# LANGUAGE TemplateHaskell #-}
4+
5+module Data.Schematic.Migration where
6+
7+import Data.Kind
8+import Data.Schematic.DSL
9+import Data.Schematic.Lens
10+import Data.Schematic.Path
11+import Data.Schematic.Schema
12+import Data.Singletons.Prelude hiding ((:.), All)
13+import Data.Singletons.TypeLits
14+import Data.Tagged
15+import Data.Vinyl
16+import Data.Vinyl.Functor
17+
18+
19+data Path
20+ = PKey Symbol -- traverse into the object by key
21+ | PTraverse -- traverse into the array
22+
23+data instance Sing (p :: Path) where
24+ SPKey :: Sing s -> Sing ('PKey s)
25+ SPTraverse :: Sing 'PTraverse
26+
27+instance KnownSymbol s => SingI ('PKey s) where
28+ sing = SPKey sing
29+
30+instance SingI 'PTraverse where
31+ sing = SPTraverse
32+
33+-- Result type blueprint
34+data Builder
35+ = BKey Schema Symbol Builder -- field schema
36+ | BTraverse Schema Builder -- array schema
37+ | BScalar Schema
38+
39+-- Working with keys
40+
41+type family SchemaByKey (fs :: [(Symbol, Schema)]) (s :: Symbol) :: Schema where
42+ SchemaByKey ( '(fn,s) ': tl) fn = s
43+ SchemaByKey ( '(a, s) ': tl) fn = SchemaByKey tl fn
44+
45+type family DeleteKey (acc :: [(Symbol, Schema)]) (fn :: Symbol) (fs :: [(Symbol, Schema)]) :: [(Symbol, Schema)] where
46+ DeleteKey acc fn ('(fn, a) ': tl) = acc ++ tl
47+ DeleteKey acc fn (fna ': tl) = acc ++ (fna ': tl)
48+
49+type family UpdateKey
50+ (fn :: Symbol)
51+ (fs :: [(Symbol, Schema)])
52+ (s :: Schema) = (r :: [(Symbol, Schema)]) where
53+ UpdateKey fn ( '(fn, a) ': tl ) s = ( '(fn, s) ': tl )
54+ UpdateKey fn ( '(fs, a) ': tl ) s = ( '(fs, a) ': UpdateKey fn tl s)
55+
56+-- schema updates
57+
58+type family Build (b :: Builder) :: Schema where
59+ Build ('BKey ('SchemaObject fs) fn z) = 'SchemaObject (UpdateKey fn fs (Build z))
60+ Build ('BTraverse ('SchemaArray acs s) z) = 'SchemaArray acs (Build z)
61+ Build ('BScalar s) = s
62+
63+type family MakeBuilder (s :: Schema) (d :: Diff) :: Builder where
64+ MakeBuilder s ('Diff '[] a) = 'BScalar (ApplyAction a s)
65+ MakeBuilder ('SchemaObject fs) ('Diff ('PKey fn ': tl) a) =
66+ 'BKey ('SchemaObject fs) fn (MakeBuilder (SchemaByKey fs fn) ('Diff tl a))
67+ MakeBuilder ('SchemaArray acs s) ('Diff ('PTraverse ': tl) a) =
68+ 'BTraverse ('SchemaArray acs s) (MakeBuilder s ('Diff tl a))
69+
70+type family ApplyAction (a :: Action) (s :: Schema) :: Schema where
71+ ApplyAction ('AddKey fn s) ('SchemaObject fs) = 'SchemaObject ('(fn,s) ': fs)
72+ ApplyAction ('DeleteKey fn) ('SchemaObject fs) = 'SchemaObject (DeleteKey '[] fn fs)
73+ ApplyAction ('Update s) t = s
74+
75+type family ApplyMigration (m :: Migration) (s :: Schema) :: (Revision, Schema) where
76+ ApplyMigration ('Migration r '[]) s = '(r, s)
77+ ApplyMigration ('Migration r (d ': ds)) s =
78+ '(r, Snd (ApplyMigration ('Migration r ds) (Build (MakeBuilder s d))))
79+
80+-- working with revisions
81+
82+type family SchemaByRevision (r :: Revision) (vd :: Versioned) :: Schema where
83+ SchemaByRevision r ('Versioned s (('Migration r ds) ': ms)) =
84+ Snd (ApplyMigration ('Migration r ds) s)
85+ SchemaByRevision r ('Versioned s (m ': ms)) =
86+ SchemaByRevision r ('Versioned (Snd (ApplyMigration m s)) ms)
87+
88+type family InitialSchema (v :: Versioned) = (s :: Schema) where
89+ InitialSchema ('Versioned s ms) = s
90+
91+type family ElemOf (e :: k) (l :: [(a,k)]) :: Constraint where
92+ ElemOf e '[] = 'True ~ 'False
93+ ElemOf e ( '(a, e) ': es) = ()
94+ ElemOf e (n ': es) = ElemOf e es
95+
96+-- | Extracts revision/schema pairs from @Versioned@ in reverse order.
97+type family AllVersions (vd :: Versioned) :: [(Revision, Schema)] where
98+ AllVersions ('Versioned s ms) = Reverse (AllVersions' '[ '("initial", s) ] ms)
99+
100+type family AllVersions' (acc :: [(Revision, Schema)]) (ms :: [Migration])
101+ = (r :: [(Revision, Schema)]) where
102+ AllVersions' acc '[] = acc
103+ AllVersions' ( '(rh, sh) ': tl ) (m ': ms) =
104+ AllVersions' ( '(rh, sh) ': ApplyMigration m sh ': tl ) ms
105+
106+type family TopVersion (rs :: [(Revision, Schema)]) :: Schema where
107+ TopVersion ( '(rh, sh) ': tl) = sh
108+
109+data Action = AddKey Symbol Schema | Update Schema | DeleteKey Symbol
110+
111+data instance Sing (a :: Action) where
112+ SAddKey
113+ :: Sing n
114+ -> Sing s
115+ -> Sing ('AddKey n s)
116+ SUpdate :: Sing s -> Sing ('Update s)
117+ SDeleteKey :: Sing s -> Sing ('DeleteKey s)
118+
119+-- | User-supplied atomic difference between schemas.
120+-- Migrations can consists of many differences.
121+data Diff = Diff [Path] Action
122+
123+data instance Sing (diff :: Diff) where
124+ SDiff
125+ :: Sing (jp :: [Path])
126+ -> Sing (a :: Action)
127+ -> Sing ('Diff jp a)
128+
129+-- | User-provided name of the revision.
130+type Revision = Symbol
131+
132+data Migration = Migration Revision [Diff]
133+
134+data instance Sing (m :: Migration) where
135+ SMigration
136+ :: Sing r
137+ -> Sing ds
138+ -> Sing ('Migration r ds)
139+
140+data Versioned = Versioned Schema [Migration]
141+
142+data instance Sing (v :: Versioned) where
143+ SVersioned
144+ :: Sing (s :: Schema) -- base version
145+ -> Sing (ms :: [Migration]) -- a bunch of migrations
146+ -> Sing ('Versioned s ms)
147+
148+type DataMigration s m h = Tagged s (JsonRepr h -> m (JsonRepr s))
149+
150+data MList :: (Type -> Type) -> [Schema] -> Type where
151+ MNil :: (Monad m, SingI s, TopLevel s) => MList m '[s]
152+ (:&&)
153+ :: (TopLevel s, SingI s)
154+ => DataMigration s m h
155+ -> MList m (h ': tl)
156+ -> MList m (s ': h ': tl)
157+
158+infixr 7 :&&
159+
160+#if MIN_VERSION_base(4,12,0)
161+migrateObject
162+ :: forall m fs fh. (FSubset fs fs (FImage fs fs), Monad m, RMap fh, RMap fs)
163+ => (Rec (Tagged fs :. FieldRepr) fh -> m (Rec (Tagged fs :. FieldRepr) fs))
164+ -> Tagged ('SchemaObject fs) (JsonRepr ('SchemaObject fh) -> m (JsonRepr ('SchemaObject fs)))
165+#else
166+migrateObject
167+ :: forall m fs fh. (FSubset fs fs (FImage fs fs), Monad m)
168+ => (Rec (Tagged fs :. FieldRepr) fh -> m (Rec (Tagged fs :. FieldRepr) fs))
169+ -> Tagged ('SchemaObject fs) (JsonRepr ('SchemaObject fh) -> m (JsonRepr ('SchemaObject fs)))
170+#endif
171+migrateObject f = Tagged $ \(ReprObject r) -> do
172+ res <- f $ rmap (Compose . Tagged) r
173+ pure $ withRepr @('SchemaObject fs) res
174+
175+shrinkObject
176+ :: forall rs ss m
177+ . ( Monad m, FSubset rs ss (FImage rs ss) )
178+ => Tagged
179+ ('SchemaObject rs)
180+ (JsonRepr ('SchemaObject ss) -> m (JsonRepr ('SchemaObject rs)))
181+shrinkObject = Tagged $ \(ReprObject r) -> pure $ ReprObject $ fcast r
182+
183+type family MapSnd (l :: [(a,k)]) = (r :: [k]) where
184+ MapSnd '[] = '[]
185+ MapSnd ( '(a, b) ': tl) = b ': MapSnd tl
186+
187+type MigrationList m vs = MList m (MapSnd (AllVersions vs))
src/Data/Schematic/OldSchema.hsdeleted−76
@@ -1,76 +0,0 @@
1−{-# LANGUAGE AllowAmbiguousTypes #-}
2−
3−module Data.Schematic.Schema where
4−
5−import Data.Maybe
6−import Data.Proxy
7−import GHC.TypeLits
8−import Text.Regex
9−
10−
11−-- JSON types
12−data JText
13−data JNumber
14−data JArray
15−data JObject
16−data JNull
17−
18−type family Repr (ty :: k1) :: k2 where
19− Repr JText = String -- because of matchRegex
20− Repr JNumber = Double
21−
22−class Schema schema where
23− type Term subschema
24− predicate :: Repr (Term ty) -> Bool
25−
26−data Regexp (s :: Symbol) = Regexp
27−
28−instance KnownSymbol reg => Schema (Regexp reg) subschema where
29− type Term (Regexp reg) subschema = Term ((), subschema)
30− predicate = isJust . matchRegex (mkRegex $ symbolVal (Proxy :: Proxy reg))
31−
32−data LengthEqNat (n :: Nat)
33−data LengthGtNat (n :: Nat)
34−data LengthGeNat (n :: Nat)
35−data LengthLtNat (n :: Nat)
36−data LengthLeNat (n :: Nat)
37−
38−instance KnownNat n => Schema (LengthEqNat n) subschema where
39− type Term (LengthEqNat n) s = Term s
40− predicate s = natVal (Proxy :: Proxy n) == fromIntegral (length s)
41− && predicate
42−
43−instance KnownNat n => Schema (LengthGtNat n) rest where
44− type Term (LengthGtNat n) = JNumber
45− predicate s = natVal (Proxy :: Proxy n) > fromIntegral (length s)
46−
47−instance KnownNat n => Schema (LengthGeNat n) rest where
48− type Term (LengthGeNat n) = JNumber
49− predicate s = natVal (Proxy :: Proxy n) >= fromIntegral (length s)
50−
51−instance KnownNat n => Schema (LengthLtNat n) rest where
52− type Term (LengthLtNat n) = JNumber
53− predicate s = natVal (Proxy :: Proxy n) < fromIntegral (length s)
54−
55−instance KnownNat n => Schema (LengthLeNat n) rest where
56− type Term (LengthLeNat n) = JNumber
57− predicate s = natVal (Proxy :: Proxy n) <= fromIntegral (length s)
58−
59−-- | Corresponds to [] or {} json values.
60−data EmptyObj = EmptyObj
61−
62−data ConsObj (s :: Symbol) jsval = ConsObj
63−
64−-- data Schema a where
65−-- (:*:) :: KnownSymbol label => label -> Schema l -> Schema r -> Schema a
66−-- (:%:) :: Schema c a => Schema a -> c a -> Schema a
67−-- Nil :: Schema a
68−
69−data (s :: Symbol) :+: obj = (:+:) a b
70−
71−infixl 6 :+:
72−infixl 6 :*:
73−infixl 9 :%:
74−
75−schema :: Schema ()
76−schema = "foo" :%: (Regexp "foo") :*: Nil
src/Data/Schematic/Path.hsnew file+39
@@ -0,0 +1,39 @@
1+module Data.Schematic.Path where
2+
3+import Data.Foldable as F
4+import Data.Singletons.Prelude
5+import Data.Singletons.TypeLits
6+import Data.Text as T
7+
8+
9+data PathSegment = Key Symbol | Ix Nat
10+
11+data instance Sing (jp :: PathSegment) where
12+ SKey :: (SingI k) => Sing (k :: Symbol) -> Sing ('Key k)
13+ SIx :: (SingI n) => Sing (n :: Nat) -> Sing ('Ix n)
14+
15+data DemotedPathSegment = DKey Text | DIx Integer
16+ deriving (Show)
17+
18+-- | Textual representation of json path.
19+newtype JSONPath = JSONPath Text
20+ deriving (Show)
21+
22+demotePath :: Sing (ps :: [PathSegment]) -> [DemotedPathSegment]
23+demotePath = go []
24+ where
25+ go :: [DemotedPathSegment] -> Sing (ps :: [PathSegment]) -> [DemotedPathSegment]
26+ go acc SNil = acc
27+ go acc (SCons p ps) = go (acc ++ [demotePathSeg p]) ps
28+ demotePathSeg :: Sing (ps :: PathSegment) -> DemotedPathSegment
29+ demotePathSeg (SKey s) = DKey $ T.pack $ withKnownSymbol s $ symbolVal s
30+ demotePathSeg (SIx n) = DIx $ withKnownNat n $ fromIntegral $ natVal n
31+
32+demotedPathToText :: [DemotedPathSegment] -> JSONPath
33+demotedPathToText = JSONPath . F.foldl' renderPathSegment ""
34+ where
35+ renderPathSegment acc (DKey t) = acc <> "." <> t
36+ renderPathSegment acc (DIx n) = acc <> "[" <> T.pack (show n) <> "]"
37+
38+pathToText :: Sing (ps :: [PathSegment]) -> JSONPath
39+pathToText = demotedPathToText . demotePath
src/Data/Schematic/Schema.hs+576−173
@@ -1,192 +1,595 @@
1{-# LANGUAGE AllowAmbiguousTypes #-}
1{-# LANGUAGE AllowAmbiguousTypes #-}
2−{-# LANGUAGE DataKinds #-}
2+{-# LANGUAGE CPP #-}
3−{-# LANGUAGE InstanceSigs #-}
3+{-# LANGUAGE OverloadedLists #-}
4−{-# LANGUAGE UndecidableInstances #-}
4+{-# LANGUAGE OverloadedStrings #-}
5{-# OPTIONS_GHC -fprint-explicit-kinds #-}
5{-# OPTIONS_GHC -fprint-explicit-kinds #-}
6
6
7module Data.Schematic.Schema where
7module Data.Schematic.Schema where
8
8
9+import Control.Applicative ((<|>))
10+import Control.Monad
11+import Data.Aeson as J
12+import Data.Aeson.Types as J
13+import Data.HashMap.Strict as H
9−import Data.Kind hiding (Type)
14+import Data.Kind
10−import Data.Proxy
15+import Data.Maybe
16+import Data.Schematic.Generator
11−import Data.Text (Text)
17+import Data.Schematic.Instances ()
12−import GHC.TypeLits (KnownNat, natVal, KnownSymbol, symbolVal, Symbol, Nat)
18+import Data.Scientific
13−
19+import Data.Singletons.Prelude.List hiding (All, Union)
14−
20+import Data.Singletons.TH
15−-- | Type Tags
21+import Data.Singletons.TypeLits
16−data JType
22+import Data.Text as T
17− = JText
23+import Data.Union
18− | JNumber
24+import Data.Vector as V
19− | JArray
25+import Data.Vinyl hiding (Dict)
20− | JObject
26+import qualified Data.Vinyl.TypeLevel as V
21− | JNull
27+import GHC.Exts
22−
28+import GHC.Generics (Generic)
23−type family Repr (ty :: JType) :: * where
29+import GHC.TypeLits
24− Repr 'JText = String -- because of matchRegex
30+ (SomeNat(..), SomeSymbol(..), someNatVal, someSymbolVal)
25− Repr 'JNumber = Double
31+import Prelude as P
26−
32+import Test.SmallCheck.Series
33+
34+
27−type family CRepr (jty :: JType) :: * where
35+type family CRepr (s :: Schema) :: Type where
28− CRepr JText = TextConstraint
36+ CRepr ('SchemaText cs) = TextConstraint
29− CRepr JNumber = NumberConstraint
37+ CRepr ('SchemaNumber cs) = NumberConstraint
30− CRepr JObject = (String, Schema)
38+ CRepr ('SchemaObject fs) = (String, Schema)
31− CRepr JArray = ArrayConstraint
39+ CRepr ('SchemaArray ar s) = ArrayConstraint
32−
33−class Constrained (ty :: JType) c where
34− cRep :: Proxy ty -> Proxy c -> CRepr ty
35−
36−-- Validators
37−
38−data LengthEqNat nat
39−
40−instance KnownNat nat => Constrained 'JText (LengthEqNat nat) where
41− cRep _ _ = LengthEq $ natVal (Proxy @nat)
42−
43−data Gt nat
44−
45−instance KnownNat nat => Constrained 'JNumber (Gt nat) where
46− cRep _ _ = Gt $ natVal (Proxy @nat)
47−
48−instance KnownNat nat => Constrained 'JArray (LengthEqNat nat) where
49− cRep _ _ = LengthArrEq $ natVal (Proxy @nat)
50−
51−-- /Validators
52−
53−data Field field ty schema
54−
55−data Empty
56−
57−class Verifiable ty cs where
58− schema :: Proxy ty -> Proxy cs -> [CRepr ty]
59−
60−instance
61− ( Constrained 'JText c
62− , Verifiable 'JText cs )
63− => Verifiable 'JText (c ': cs) where
64− schema _ _ = cRep (Proxy @'JText) (Proxy @c)
65− : schema (Proxy @'JText) (Proxy @cs)
66−
67−instance
68− ( Constrained 'JNumber c
69− , Verifiable 'JNumber cs )
70− => Verifiable 'JNumber (c ': cs) where
71− schema _ _ = cRep (Proxy @'JNumber) (Proxy @c)
72− : schema (Proxy @'JNumber) (Proxy @cs)
73−
74−instance Verifiable jty '[] where
75− schema _ _ = []
76−
77−instance
78− ( Constrained 'JArray c
79− , Verifiable 'JArray cs )
80− => Verifiable 'JArray (c ': cs) where
81− schema _ _ = cRep (Proxy @'JArray) (Proxy @c)
82− : schema (Proxy @'JArray) (Proxy @cs)
83−
84−instance
85− ( SchemaConstructor jty
86− , Verifiable 'JObject fs
87− , KnownSymbol field
88− , Verifiable jty cs )
89− => Verifiable 'JObject ((Field field jty cs) ': fs) where
90− schema _ _ = (fieldName, fieldSchema) : schema (Proxy @'JObject) (Proxy @fs)
91− where
92− fieldName = symbolVal (Proxy @field)
93− fieldSchema = constructor (Proxy @jty) $ schema (Proxy @jty) (Proxy @cs)
94
40
95data TextConstraint
41data TextConstraint
42+ = TEq Nat
43+ | TLt Nat
44+ | TLe Nat
45+ | TGt Nat
46+ | TGe Nat
47+ | TRegex Symbol
48+ | TEnum [Symbol]
49+ deriving (Generic)
50+
51+instance SingKind TextConstraint where
52+ type Demote TextConstraint = DemotedTextConstraint
53+ fromSing = \case
54+ STEq n -> withKnownNat n (DTEq . fromIntegral $ natVal n)
55+ STLt n -> withKnownNat n (DTLt . fromIntegral $ natVal n)
56+ STLe n -> withKnownNat n (DTLe . fromIntegral $ natVal n)
57+ STGt n -> withKnownNat n (DTGt . fromIntegral $ natVal n)
58+ STGe n -> withKnownNat n (DTGe . fromIntegral $ natVal n)
59+ STRegex s -> withKnownSymbol s (DTRegex $ T.pack $ symbolVal s)
60+ STEnum s -> let
61+ d :: Sing (s :: [Symbol]) -> [Text]
62+ d SNil = []
63+ d (SCons ss@SSym fs) = T.pack (symbolVal ss) : d fs
64+ in DTEnum $ d s
65+ toSing = \case
66+ DTEq n -> case someNatVal n of
67+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (STEq (SNat :: Sing n))
68+ Nothing -> error "Negative singleton nat"
69+ DTLt n -> case someNatVal n of
70+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (STLt (SNat :: Sing n))
71+ Nothing -> error "Negative singleton nat"
72+ DTLe n -> case someNatVal n of
73+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (STLe (SNat :: Sing n))
74+ Nothing -> error "Negative singleton nat"
75+ DTGt n -> case someNatVal n of
76+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (STGt (SNat :: Sing n))
77+ Nothing -> error "Negative singleton nat"
78+ DTGe n -> case someNatVal n of
79+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (STGe (SNat :: Sing n))
80+ Nothing -> error "Negative singleton nat"
81+ DTRegex s -> case someSymbolVal (T.unpack s) of
82+ SomeSymbol (_ :: Proxy n) -> SomeSing (STRegex (SSym :: Sing n))
83+ DTEnum ss -> case toSing ss of
84+ SomeSing l -> SomeSing (STEnum l)
85+
86+data DemotedTextConstraint
96− = LengthEq Integer
87+ = DTEq Integer
97− | LengthLe Integer
88+ | DTLt Integer
98− | LengthGt Integer
89+ | DTLe Integer
90+ | DTGt Integer
91+ | DTGe Integer
92+ | DTRegex Text
93+ | DTEnum [Text]
99− deriving (Show, Eq)
94+ deriving (Generic, Eq, Show)
95+
96+data instance Sing (tc :: TextConstraint) where
97+ STEq :: Sing n -> Sing ('TEq n)
98+ STLt :: Sing n -> Sing ('TLt n)
99+ STLe :: Sing n -> Sing ('TLe n)
100+ STGt :: Sing n -> Sing ('TGt n)
101+ STGe :: Sing n -> Sing ('TGe n)
102+ STRegex :: Sing s -> Sing ('TRegex s)
103+ STEnum :: Sing ss -> Sing ('TEnum ss)
104+
105+instance (KnownNat n) => SingI ('TEq n) where sing = STEq sing
106+instance (KnownNat n) => SingI ('TGt n) where sing = STGt sing
107+instance (KnownNat n) => SingI ('TGe n) where sing = STGe sing
108+instance (KnownNat n) => SingI ('TLt n) where sing = STLt sing
109+instance (KnownNat n) => SingI ('TLe n) where sing = STLe sing
110+instance (KnownSymbol s, SingI s) => SingI ('TRegex s) where sing = STRegex sing
111+instance (SingI ss) => SingI ('TEnum ss) where sing = STEnum sing
112+
113+instance Eq (Sing ('TEq n)) where _ == _ = True
114+instance Eq (Sing ('TLt n)) where _ == _ = True
115+instance Eq (Sing ('TLe n)) where _ == _ = True
116+instance Eq (Sing ('TGt n)) where _ == _ = True
117+instance Eq (Sing ('TGe n)) where _ == _ = True
118+instance Eq (Sing ('TRegex t)) where _ == _ = True
119+instance Eq (Sing ('TEnum ss)) where _ == _ = True
100
120
101data NumberConstraint
121data NumberConstraint
122+ = NLe Nat
123+ | NLt Nat
124+ | NGt Nat
125+ | NGe Nat
126+ | NEq Nat
127+ deriving (Generic)
128+
129+data DemotedNumberConstraint
130+ = DNLe Integer
102− = Le Integer
131+ | DNLt Integer
132+ | DNGt Integer
103− | Gt Integer
133+ | DNGe Integer
104− | Eq Integer
134+ | DNEq Integer
105− deriving (Show, Eq)
135+ deriving (Generic, Eq, Show)
136+
137+data instance Sing (nc :: NumberConstraint) where
138+ SNEq :: Sing n -> Sing ('NEq n)
139+ SNGt :: Sing n -> Sing ('NGt n)
140+ SNGe :: Sing n -> Sing ('NGe n)
141+ SNLt :: Sing n -> Sing ('NLt n)
142+ SNLe :: Sing n -> Sing ('NLe n)
143+
144+instance KnownNat n => SingI ('NEq n) where sing = SNEq sing
145+instance KnownNat n => SingI ('NGt n) where sing = SNGt sing
146+instance KnownNat n => SingI ('NGe n) where sing = SNGe sing
147+instance KnownNat n => SingI ('NLt n) where sing = SNLt sing
148+instance KnownNat n => SingI ('NLe n) where sing = SNLe sing
149+
150+instance Eq (Sing ('NEq n)) where _ == _ = True
151+instance Eq (Sing ('NLt n)) where _ == _ = True
152+instance Eq (Sing ('NLe n)) where _ == _ = True
153+instance Eq (Sing ('NGt n)) where _ == _ = True
154+instance Eq (Sing ('NGe n)) where _ == _ = True
155+
156+instance SingKind NumberConstraint where
157+ type Demote NumberConstraint = DemotedNumberConstraint
158+ fromSing = \case
159+ SNEq n -> withKnownNat n (DNEq . fromIntegral $ natVal n)
160+ SNGt n -> withKnownNat n (DNGt . fromIntegral $ natVal n)
161+ SNGe n -> withKnownNat n (DNGe . fromIntegral $ natVal n)
162+ SNLt n -> withKnownNat n (DNLt . fromIntegral $ natVal n)
163+ SNLe n -> withKnownNat n (DNLe . fromIntegral $ natVal n)
164+ toSing = \case
165+ DNEq n -> case someNatVal n of
166+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SNEq (SNat :: Sing n))
167+ Nothing -> error "Negative singleton nat"
168+ DNGt n -> case someNatVal n of
169+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SNGt (SNat :: Sing n))
170+ Nothing -> error "Negative singleton nat"
171+ DNGe n -> case someNatVal n of
172+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SNGe (SNat :: Sing n))
173+ Nothing -> error "Negative singleton nat"
174+ DNLt n -> case someNatVal n of
175+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SNLt (SNat :: Sing n))
176+ Nothing -> error "Negative singleton nat"
177+ DNLe n -> case someNatVal n of
178+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SNLe (SNat :: Sing n))
179+ Nothing -> error "Negative singleton nat"
106
180
107data ArrayConstraint
181data ArrayConstraint
182+ = AEq Nat
183+ | AGt Nat
184+ | AGe Nat
185+ | ALt Nat
186+ | ALe Nat
187+ deriving (Generic)
188+
189+data DemotedArrayConstraint
190+ = DAEq Integer
191+ | DAGt Integer
108− = LengthArrEq Integer
192+ | DAGe Integer
193+ | DALt Integer
194+ | DALe Integer
109− deriving (Show, Eq)
195+ deriving (Generic, Eq, Show)
196+
197+data instance Sing (ac :: ArrayConstraint) where
198+ SAEq :: Sing n -> Sing ('AEq n)
199+ SAGt :: Sing n -> Sing ('AGt n)
200+ SAGe :: Sing n -> Sing ('AGe n)
201+ SALt :: Sing n -> Sing ('ALt n)
202+ SALe :: Sing n -> Sing ('ALe n)
203+
204+instance KnownNat n => SingI ('AEq n) where sing = SAEq sing
205+instance KnownNat n => SingI ('AGt n) where sing = SAGt sing
206+instance KnownNat n => SingI ('AGe n) where sing = SAGe sing
207+instance KnownNat n => SingI ('ALt n) where sing = SALt sing
208+instance KnownNat n => SingI ('ALe n) where sing = SALe sing
209+
210+instance Eq (Sing ('AEq n)) where _ == _ = True
211+instance Eq (Sing ('AGt n)) where _ == _ = True
212+instance Eq (Sing ('AGe n)) where _ == _ = True
213+instance Eq (Sing ('ALt n)) where _ == _ = True
214+instance Eq (Sing ('ALe n)) where _ == _ = True
215+
216+instance SingKind ArrayConstraint where
217+ type Demote ArrayConstraint = DemotedArrayConstraint
218+ fromSing = \case
219+ SAEq n -> withKnownNat n (DAEq . fromIntegral $ natVal n)
220+ SAGt n -> withKnownNat n (DAGt . fromIntegral $ natVal n)
221+ SAGe n -> withKnownNat n (DAGe . fromIntegral $ natVal n)
222+ SALt n -> withKnownNat n (DALt . fromIntegral $ natVal n)
223+ SALe n -> withKnownNat n (DALe . fromIntegral $ natVal n)
224+ toSing = \case
225+ DAEq n -> case someNatVal n of
226+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SAEq (SNat :: Sing n))
227+ Nothing -> error "Negative singleton nat"
228+ DAGt n -> case someNatVal n of
229+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SAGt (SNat :: Sing n))
230+ Nothing -> error "Negative singleton nat"
231+ DAGe n -> case someNatVal n of
232+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SAGe (SNat :: Sing n))
233+ Nothing -> error "Negative singleton nat"
234+ DALt n -> case someNatVal n of
235+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SALt (SNat :: Sing n))
236+ Nothing -> error "Negative singleton nat"
237+ DALe n -> case someNatVal n of
238+ Just (SomeNat (_ :: Proxy n)) -> SomeSing (SALe (SNat :: Sing n))
239+ Nothing -> error "Negative singleton nat"
110
240
111data Schema
241data Schema
112 = SchemaText [TextConstraint]
242 = SchemaText [TextConstraint]
243+ | SchemaBoolean
113 | SchemaNumber [NumberConstraint]
244 | SchemaNumber [NumberConstraint]
114− | SchemaObject [(String, Schema)]
245+ | SchemaObject [(Symbol, Schema)]
115 | SchemaArray [ArrayConstraint] Schema
246 | SchemaArray [ArrayConstraint] Schema
247+ | SchemaNull
248+ | SchemaOptional Schema
249+ | SchemaUnion [Schema]
116− deriving (Show, Eq)
250+ deriving (Generic)
117−
251+
118−-- | Apply constraint for each element of list
252+data DemotedSchema
119−-- type family AllSatisfy (c :: k -> Constraint) (s :: [k]) :: Constraint where
253+ = DSchemaText [DemotedTextConstraint]
120−-- AllSatisfy c '[] = ()
254+ | DSchemaNumber [DemotedNumberConstraint]
121−-- AllSatisfy c (a ': as) = (c a, AllSatisfy c as)
255+ | DSchemaBoolean
122−
256+ | DSchemaObject [(Text, DemotedSchema)]
123−class SchemaConstructor jty where
257+ | DSchemaArray [DemotedArrayConstraint] DemotedSchema
124− constructor :: Proxy jty -> [CRepr jty] -> Schema
258+ | DSchemaNull
125−
259+ | DSchemaOptional DemotedSchema
126−instance SchemaConstructor 'JText where
260+ | DSchemaUnion [DemotedSchema]
127− constructor _ = SchemaText
261+ deriving (Generic, Eq, Show)
128−
262+
129−instance SchemaConstructor 'JNumber where
263+data instance Sing (schema :: Schema) where
130− constructor _ = SchemaNumber
264+ SSchemaText :: Sing tcs -> Sing ('SchemaText tcs)
131−
265+ SSchemaNumber :: Sing ncs -> Sing ('SchemaNumber ncs)
132−instance SchemaConstructor 'JObject where
266+ SSchemaBoolean :: Sing 'SchemaBoolean
133− constructor _ = SchemaObject
267+ SSchemaArray :: Sing acs -> Sing schema -> Sing ('SchemaArray acs schema)
134−
268+ SSchemaObject :: Sing fields -> Sing ('SchemaObject fields)
135−class Schematic ty where
269+ SSchemaOptional :: Sing s -> Sing ('SchemaOptional s)
136− type JT (ty :: k) :: JType
270+ SSchemaNull :: Sing 'SchemaNull
137− build :: Proxy ty -> Schema
271+ SSchemaUnion :: Sing ss -> Sing ('SchemaUnion ss)
138−
272+
139−data SText cs
273+instance SingI sl => SingI ('SchemaText sl) where
140−
274+ sing = SSchemaText sing
141−instance (Verifiable 'JText cs) => Schematic (SText cs) where
275+instance SingI sl => SingI ('SchemaNumber sl) where
142− type JT (SText cs) = 'JText
276+ sing = SSchemaNumber sing
143− build _ = constructor (Proxy @(JT (SText cs))) $ schema (Proxy @JText) (Proxy @cs)
277+instance SingI 'SchemaNull where
144−
278+ sing = SSchemaNull
145−data SNumber cs
279+instance SingI 'SchemaBoolean where
146−
280+ sing = SSchemaBoolean
147−instance (Verifiable 'JNumber cs) => Schematic (SNumber cs) where
281+instance (SingI ac, SingI s) => SingI ('SchemaArray ac s) where
148− type JT (SNumber cs) = 'JNumber
282+ sing = SSchemaArray sing sing
149− build _ = constructor (Proxy @(JT (SNumber cs)))
283+instance SingI stl => SingI ('SchemaObject stl) where
150− $ schema (Proxy @'JNumber) (Proxy @cs)
284+ sing = SSchemaObject sing
285+instance SingI s => SingI ('SchemaOptional s) where
286+ sing = SSchemaOptional sing
287+instance SingI s => SingI ('SchemaUnion s) where
288+ sing = SSchemaUnion sing
289+
290+instance Eq (Sing ('SchemaText cs)) where _ == _ = True
291+instance Eq (Sing ('SchemaNumber cs)) where _ == _ = True
292+instance Eq (Sing 'SchemaNull) where _ == _ = True
293+instance Eq (Sing 'SchemaBoolean) where _ == _ = True
294+instance Eq (Sing ('SchemaArray as s)) where _ == _ = True
295+instance Eq (Sing ('SchemaObject cs)) where _ == _ = True
296+instance Eq (Sing ('SchemaOptional s)) where _ == _ = True
297+instance Eq (Sing ('SchemaUnion s)) where _ == _ = True
298+
299+instance SingKind Schema where
300+ type Demote Schema = DemotedSchema
301+ fromSing = \case
302+ SSchemaText cs -> DSchemaText $ fromSing cs
303+ SSchemaNumber cs -> DSchemaNumber $ fromSing cs
304+ SSchemaBoolean -> DSchemaBoolean
305+ SSchemaArray cs s -> DSchemaArray (fromSing cs) (fromSing s)
306+ SSchemaOptional s -> DSchemaOptional $ fromSing s
307+ SSchemaNull -> DSchemaNull
308+ SSchemaObject cs -> DSchemaObject $ fromSing cs
309+ SSchemaUnion ss -> DSchemaUnion $ fromSing ss
310+ toSing = \case
311+ DSchemaText cs -> case toSing cs of
312+ SomeSing scs -> SomeSing $ SSchemaText scs
313+ DSchemaNumber cs -> case toSing cs of
314+ SomeSing scs -> SomeSing $ SSchemaNumber scs
315+ DSchemaBoolean -> SomeSing $ SSchemaBoolean
316+ DSchemaArray cs sch -> case (toSing cs, toSing sch) of
317+ (SomeSing scs, SomeSing ssch) -> SomeSing $ SSchemaArray scs ssch
318+ DSchemaOptional sch -> case toSing sch of
319+ SomeSing ssch -> SomeSing $ SSchemaOptional ssch
320+ DSchemaNull -> SomeSing SSchemaNull
321+ DSchemaObject cs -> case toSing cs of
322+ SomeSing scs -> SomeSing $ SSchemaObject scs
323+ DSchemaUnion ss -> case toSing ss of
324+ SomeSing sss -> SomeSing $ SSchemaUnion sss
325+
326+data FieldRepr :: (Symbol, Schema) -> Type where
327+ FieldRepr
328+ :: (SingI schema, KnownSymbol name)
329+ => JsonRepr schema
330+ -> FieldRepr '(name, schema)
331+
332+-- | Forgetful Functor Ufr
333+toJsonRepr :: FieldRepr '(fn, sch) -> JsonRepr sch
334+toJsonRepr (FieldRepr x) = x
335+
336+knownFieldName
337+ :: forall proxy (fieldName :: Symbol) schema
338+ . KnownSymbol fieldName
339+ => proxy '(fieldName, schema)
340+ -> Text
341+knownFieldName _ = T.pack $ symbolVal (Proxy @fieldName)
342+
343+knownFieldSchema
344+ :: forall proxy fieldName schema
345+ . SingI schema
346+ => proxy '(fieldName, schema)
347+ -> Sing schema
348+knownFieldSchema _ = sing
349+
350+deriving instance Show (JsonRepr schema) => Show (FieldRepr '(name, schema))
351+
352+instance Eq (JsonRepr schema) => Eq (FieldRepr '(name, schema)) where
353+ FieldRepr a == FieldRepr b = a == b
151
354
152instance
355instance
153− ( Verifiable (JT ty) cs
356+ ( KnownSymbol name
154− , SchemaConstructor (JT ty) )
357+ , SingI schema
155− => Schematic (Field field ty cs) where
358+ , Serial m (JsonRepr schema) )
156− type JT (Field field ty cs) = JT ty
359+ => Serial m (FieldRepr '(name, schema)) where
157− build _ = constructor (Proxy @(JT (Field field ty cs)))
360+ series = FieldRepr <$> series
158− $ schema (Proxy @(JT (Field field ty cs))) (Proxy @cs)
361+
159−
362+type family USubsets (u :: [k]) :: Constraint where
160−data SObject els
363+ USubsets '[] = ()
161−
364+ USubsets (h ': tl) = (USubset tl (h ': tl) (V.RImage tl (h ': tl)), USubsets tl)
162−instance (Verifiable 'JObject els) => Schematic (SObject els) where
365+
163− type JT (SObject els) = 'JObject
366+data JsonRepr :: Schema -> Type where
164− build _ =
367+ ReprText :: Text -> JsonRepr ('SchemaText cs)
165− constructor (Proxy @(JT (SObject els)))
368+ ReprNumber :: Scientific -> JsonRepr ('SchemaNumber cs)
166− $ schema (Proxy @(JT (SObject els))) (Proxy @els)
369+ ReprBoolean :: Bool -> JsonRepr 'SchemaBoolean
167−
370+ ReprNull :: JsonRepr 'SchemaNull
168−data SArray cs s
371+ ReprArray :: V.Vector (JsonRepr s) -> JsonRepr ('SchemaArray cs s)
169−
372+ ReprObject :: Rec FieldRepr fs -> JsonRepr ('SchemaObject fs)
373+ ReprOptional :: Maybe (JsonRepr s) -> JsonRepr ('SchemaOptional s)
374+ ReprUnion :: Union JsonRepr (h ': tl) -> JsonRepr ('SchemaUnion (h ': tl))
375+
376+instance (Monad m, Serial m Text, SingI cs)
377+ => Serial m (JsonRepr ('SchemaText cs)) where
378+ series = decDepth $ fmap ReprText $ textSeries $ fromSing (sing :: Sing cs)
379+
380+instance (Monad m, Serial m Scientific, SingI cs)
381+ => Serial m (JsonRepr ('SchemaNumber cs)) where
382+ series = decDepth $ fmap ReprNumber
383+ $ numberSeries $ fromSing (sing :: Sing cs)
384+
385+instance Monad m => Serial m (JsonRepr 'SchemaNull) where
386+ series = cons0 ReprNull
387+
388+instance (Serial m (JsonRepr s), Serial m (V.Vector (JsonRepr s)), SingI cs)
389+ => Serial m (JsonRepr ('SchemaArray cs s)) where
390+ series = decDepth $ fmap ReprArray
391+ $ arraySeries $ fromSing (sing :: Sing cs)
392+
393+instance (Serial m (JsonRepr s))
394+ => Serial m (JsonRepr ('SchemaOptional s)) where
395+ series = cons1 ReprOptional
396+
397+instance (Monad m, Serial m (Rec FieldRepr fs))
398+ => Serial m (JsonRepr ('SchemaObject fs)) where
399+ series = cons1 ReprObject
400+
401+-- | Move to the union package
402+instance Show (JsonRepr ('SchemaText cs)) where
403+ show (ReprText t) = "ReprText " P.++ show t
404+
405+instance Show (JsonRepr ('SchemaNumber cs)) where
406+ show (ReprNumber n) = "ReprNumber " P.++ show n
407+
408+instance Show (JsonRepr 'SchemaBoolean) where
409+ show (ReprBoolean n) = "ReprBoolean " P.++ show n
410+
411+instance Show (JsonRepr 'SchemaNull) where show _ = "ReprNull"
412+
413+instance Show (JsonRepr s) => Show (JsonRepr ('SchemaArray acs s)) where
414+ show (ReprArray v) = "ReprArray " P.++ show v
415+
416+#if MIN_VERSION_base(4,12,0)
170instance
417instance
171− ( Schematic s
418+ ( V.RecAll FieldRepr fs Show, RMap fs, ReifyConstraint Show FieldRepr fs
172− , Verifiable 'JArray cs )
419+ , RecordToList fs )
173− => Schematic (SArray cs s) where
420+ => Show (JsonRepr ('SchemaObject fs)) where
174− type JT (SArray cs s) = 'JArray
421+ show (ReprObject fs) = "ReprObject " P.++ show fs
175− build _ =
422+#else
176− SchemaArray
423+instance V.RecAll FieldRepr fs Show => Show (JsonRepr ('SchemaObject fs)) where
177− (schema (Proxy @'JArray) (Proxy @cs))
424+ show (ReprObject fs) = "ReprObject " P.++ show fs
178− (build (Proxy @s))
425+#endif
179−
426+
180−-- | Shows it's top-level definition according to the json-schema
427+instance Show (JsonRepr s) => Show (JsonRepr ('SchemaOptional s)) where
428+ show (ReprOptional s) = "ReprOptional " P.++ show s
429+
430+instance Show (Union JsonRepr (h ': tl))
431+ => Show (JsonRepr ('SchemaUnion (h ': tl))) where
432+ show (ReprUnion s) = "ReprUnion " P.++ show s
433+
434+instance Eq (Rec FieldRepr fs) => Eq (JsonRepr ('SchemaObject fs)) where
435+ ReprObject a == ReprObject b = a == b
436+
437+instance Eq (JsonRepr ('SchemaText cs)) where
438+ ReprText a == ReprText b = a == b
439+
440+instance Eq (JsonRepr ('SchemaNumber cs)) where
441+ ReprNumber a == ReprNumber b = a == b
442+
443+instance Eq (JsonRepr 'SchemaBoolean) where
444+ ReprBoolean a == ReprBoolean b = a == b
445+
446+instance Eq (JsonRepr 'SchemaNull) where
447+ ReprNull == ReprNull = True
448+
449+instance Eq (JsonRepr s) => Eq (JsonRepr ('SchemaArray as s)) where
450+ ReprArray a == ReprArray b = a == b
451+
452+instance Eq (JsonRepr s) => Eq (JsonRepr ('SchemaOptional s)) where
453+ ReprOptional a == ReprOptional b = a == b
454+
455+instance Eq (Union JsonRepr (h ': tl))
456+ => Eq (JsonRepr ('SchemaUnion (h ': tl))) where
457+ ReprUnion a == ReprUnion b = a == b
458+
459+instance Ord (Rec FieldRepr fs) => Ord (JsonRepr ('SchemaObject fs)) where
460+ ReprObject a `compare` ReprObject b = a `compare` b
461+
462+instance Ord (JsonRepr ('SchemaText cs)) where
463+ ReprText a `compare` ReprText b = a `compare` b
464+
465+instance Ord (JsonRepr ('SchemaNumber cs)) where
466+ ReprNumber a `compare` ReprNumber b = a `compare` b
467+
468+instance Ord (JsonRepr 'SchemaBoolean) where
469+ ReprBoolean a `compare` ReprBoolean b = a `compare` b
470+
471+instance Ord (JsonRepr 'SchemaNull) where
472+ compare _ _ = EQ
473+
474+instance Ord (JsonRepr s) => Ord (JsonRepr ('SchemaArray as s)) where
475+ ReprArray a `compare` ReprArray b = a `compare` b
476+
477+instance Ord (JsonRepr s) => Ord (JsonRepr ('SchemaOptional s)) where
478+ ReprOptional a `compare` ReprOptional b = a `compare` b
479+
480+instance Ord (Union JsonRepr (h ': tl))
481+ => Ord (JsonRepr ('SchemaUnion (h ': tl))) where
482+ ReprUnion a `compare` ReprUnion b = a `compare` b
483+
484+instance IsList (JsonRepr ('SchemaArray cs s)) where
485+ type Item (JsonRepr ('SchemaArray cs s)) = JsonRepr s
486+ fromList = ReprArray . GHC.Exts.fromList
487+ toList (ReprArray v) = GHC.Exts.toList v
488+
489+instance Num (JsonRepr ('SchemaNumber cs)) where
490+ ReprNumber a + ReprNumber b = ReprNumber $ a + b
491+ ReprNumber a - ReprNumber b = ReprNumber $ a - b
492+ ReprNumber a * ReprNumber b = ReprNumber $ a * b
493+ abs (ReprNumber a) = ReprNumber $ abs a
494+ signum (ReprNumber a) = ReprNumber $ signum a
495+ fromInteger = ReprNumber . fromIntegral
496+
497+instance IsString (JsonRepr ('SchemaText cs)) where
498+ fromString = ReprText . fromString
499+
500+fromOptional
501+ :: SingI s
502+ => Sing ('SchemaOptional s)
503+ -> J.Value
504+ -> Parser (Maybe (JsonRepr s))
505+fromOptional _ = parseJSON
506+
507+parseUnion
508+ :: FromJSON (JsonRepr ('SchemaUnion ss))
509+ => sing (ss :: [Schema])
510+ -> Value
511+ -> Parser (JsonRepr ('SchemaUnion ss))
512+parseUnion _ val = parseJSON val
513+
514+instance FromJSON (Union JsonRepr '[]) where
515+ parseJSON = fail "empty union"
516+
517+instance (SingI a, FromJSON (Union JsonRepr as)) => FromJSON (Union JsonRepr (a ': as)) where
518+ parseJSON val = (This <$> parseJSON val)
519+ <|> (That <$> (parseJSON val :: Parser (Union JsonRepr as)))
520+
521+instance ToJSON (Union JsonRepr as) where
522+ toJSON (This fa) = toJSON fa
523+ toJSON (That u) = toJSON u
524+
525+instance SingI schema => J.FromJSON (JsonRepr schema) where
526+ parseJSON value = case sing :: Sing schema of
527+ SSchemaText _ -> withText "String" (pure . ReprText) value
528+ SSchemaNumber _ -> withScientific "Number" (pure . ReprNumber) value
529+ SSchemaBoolean -> ReprBoolean <$> parseJSON value
530+ SSchemaNull -> case value of
531+ J.Null -> pure ReprNull
532+ _ -> typeMismatch "Null" value
533+ so@(SSchemaOptional s) -> withSingI s $ ReprOptional <$> fromOptional so value
534+ SSchemaArray sa sb -> withSingI sa $ withSingI sb
535+ $ withArray "Array" (fmap ReprArray . traverse parseJSON) value
536+ SSchemaObject fs -> do
537+ let
538+ demoteFields :: SList s -> H.HashMap Text J.Value -> Parser (Rec FieldRepr s)
539+ demoteFields SNil _ = pure RNil
540+ demoteFields (SCons (STuple2 (n :: Sing fn) s) tl) h = withKnownSymbol n $ do
541+ let fieldName = T.pack $ symbolVal (Proxy @fn)
542+ fieldRepr <- case s of
543+ SSchemaText so -> case H.lookup fieldName h of
544+ Just v -> withSingI so $ FieldRepr <$> parseJSON v
545+ Nothing -> fail $ "No text field: " P.++ show fieldName
546+ SSchemaNumber so -> case H.lookup fieldName h of
547+ Just v -> withSingI so $ FieldRepr <$> parseJSON v
548+ Nothing -> fail $ "No number field: " P.++ show fieldName
549+ SSchemaBoolean -> case H.lookup fieldName h of
550+ Just v -> FieldRepr <$> parseJSON v
551+ Nothing -> fail $ "No boolean field: " P.++ show fieldName
552+ SSchemaNull -> case H.lookup fieldName h of
553+ Just v -> FieldRepr <$> parseJSON v
554+ Nothing -> fail $ "No null field: " P.++ show fieldName
555+ SSchemaArray sa sb -> case H.lookup fieldName h of
556+ Just v -> withSingI sa $ withSingI sb $ FieldRepr <$> parseJSON v
557+ Nothing -> fail $ "No array field: " P.++ show fieldName
558+ SSchemaObject so -> case H.lookup fieldName h of
559+ Just v -> withSingI so $ FieldRepr <$> parseJSON v
560+ Nothing -> fail $ "No object field" P.++ show fieldName
561+ SSchemaOptional so -> case H.lookup fieldName h of
562+ Just v -> withSingI so $ FieldRepr <$> parseJSON v
563+ Nothing -> withSingI so $ pure $ FieldRepr $ ReprOptional Nothing
564+ SSchemaUnion ss -> withSingI ss $ FieldRepr <$> parseUnion ss value
565+ (fieldRepr :&) <$> demoteFields tl h
566+ ReprObject <$> withObject "Object" (demoteFields fs) value
567+ SSchemaUnion ss -> parseUnion ss value
568+
569+instance J.ToJSON (JsonRepr a) where
570+ toJSON ReprNull = J.Null
571+ toJSON (ReprBoolean b) = J.Bool b
572+ toJSON (ReprText t) = J.String t
573+ toJSON (ReprNumber n) = J.Number n
574+ toJSON (ReprOptional s) = case s of
575+ Just v -> toJSON v
576+ Nothing -> J.Null
577+ toJSON (ReprArray v) = J.Array $ toJSON <$> v
578+ toJSON (ReprObject r) = J.Object . H.fromList . fold $ r
579+ where
580+ extract :: forall name s . (KnownSymbol name)
581+ => FieldRepr '(name, s)
582+ -> (Text, Value)
583+ extract (FieldRepr s) = (T.pack $ symbolVal $ Proxy @name, toJSON s)
584+ fold :: Rec FieldRepr fs -> [(Text, J.Value)]
585+ fold = \case
586+ RNil -> []
587+ fr@(FieldRepr _) :& tl -> (extract fr) : fold tl
588+ toJSON (ReprUnion u) = toJSON u
589+
590+class FalseConstraint a
591+
592+type family TopLevel (schema :: Schema) :: Constraint where
593+ TopLevel ('SchemaArray acs s) = ()
594+ TopLevel ('SchemaObject o) = ()
181−class TopLevel spec
595+ TopLevel spec = 'True ~ 'False
182−
183−instance Schematic (SObject els) => TopLevel (SObject els)
184−
185−instance Schematic (SArray cs s) => TopLevel (SArray cs s)
186−
187−-- | TODO: abstract over objects and arrays
188−-- toSchema
189−-- :: forall els (e :: [k]). (e ~ '[], Verifiable (JT (SObject els)) e, Schematic (SObject els))
190−-- => Proxy (SObject els)
191−-- -> Schema
192−-- toSchema p = constructor p $ schema (Proxy @(JT (SObject els))) (Proxy @els)
src/Data/Schematic/Schema.hs-bootnew file+95
@@ -0,0 +1,95 @@
1+module Data.Schematic.Schema where
2+
3+import Data.Kind
4+import Data.Maybe
5+import Data.Schematic.Instances ()
6+import Data.Scientific
7+import Data.Singletons.TH
8+import Data.Singletons.TypeLits
9+import Data.Text as T
10+import Data.Union
11+import Data.Vector as V
12+import Data.Vinyl hiding (Dict)
13+import Prelude as P
14+
15+data TextConstraint
16+ = TEq Nat
17+ | TLt Nat
18+ | TLe Nat
19+ | TGt Nat
20+ | TGe Nat
21+ | TRegex Symbol
22+ | TEnum [Symbol]
23+
24+data DemotedTextConstraint
25+ = DTEq Integer
26+ | DTLt Integer
27+ | DTLe Integer
28+ | DTGt Integer
29+ | DTGe Integer
30+ | DTRegex Text
31+ | DTEnum [Text]
32+
33+data NumberConstraint
34+ = NLe Nat
35+ | NLt Nat
36+ | NGt Nat
37+ | NGe Nat
38+ | NEq Nat
39+
40+data DemotedNumberConstraint
41+ = DNLe Integer
42+ | DNLt Integer
43+ | DNGt Integer
44+ | DNGe Integer
45+ | DNEq Integer
46+
47+data ArrayConstraint
48+ = AEq Nat
49+ | AGt Nat
50+ | AGe Nat
51+ | ALt Nat
52+ | ALe Nat
53+
54+data DemotedArrayConstraint
55+ = DAEq Integer
56+ | DAGt Integer
57+ | DAGe Integer
58+ | DALt Integer
59+ | DALe Integer
60+
61+data Schema
62+ = SchemaText [TextConstraint]
63+ | SchemaBoolean
64+ | SchemaNumber [NumberConstraint]
65+ | SchemaObject [(Symbol, Schema)]
66+ | SchemaArray [ArrayConstraint] Schema
67+ | SchemaNull
68+ | SchemaOptional Schema
69+ | SchemaUnion [Schema]
70+
71+data DemotedSchema
72+ = DSchemaText [DemotedTextConstraint]
73+ | DSchemaNumber [DemotedNumberConstraint]
74+ | DSchemaBoolean
75+ | DSchemaObject [(Text, DemotedSchema)]
76+ | DSchemaArray [DemotedArrayConstraint] DemotedSchema
77+ | DSchemaNull
78+ | DSchemaOptional DemotedSchema
79+ | DSchemaUnion [DemotedSchema]
80+
81+data FieldRepr :: (Symbol, Schema) -> Type where
82+ FieldRepr
83+ :: (SingI schema, KnownSymbol name)
84+ => JsonRepr schema
85+ -> FieldRepr '(name, schema)
86+
87+data JsonRepr :: Schema -> Type where
88+ ReprText :: Text -> JsonRepr ('SchemaText cs)
89+ ReprNumber :: Scientific -> JsonRepr ('SchemaNumber cs)
90+ ReprBoolean :: Bool -> JsonRepr 'SchemaBoolean
91+ ReprNull :: JsonRepr 'SchemaNull
92+ ReprArray :: V.Vector (JsonRepr s) -> JsonRepr ('SchemaArray cs s)
93+ ReprObject :: Rec FieldRepr fs -> JsonRepr ('SchemaObject fs)
94+ ReprOptional :: Maybe (JsonRepr s) -> JsonRepr ('SchemaOptional s)
95+ ReprUnion :: Union JsonRepr (h ': tl) -> JsonRepr ('SchemaUnion (h ': tl))
src/Data/Schematic/Validatable.hsdeleted−5
@@ -1,5 +0,0 @@
1−module Data.Schematic.Validatable where
2−
3−
4−class Validatable spec where
5− type Schema a
src/Data/Schematic/Validation.hsnew file+305
@@ -0,0 +1,305 @@
1+module Data.Schematic.Validation where
2+
3+import Control.Monad
4+import Control.Monad.Validation
5+import Data.Aeson
6+import Data.Aeson.Types
7+import Data.Foldable
8+import Data.Functor.Identity
9+import Data.Monoid
10+import Data.Schematic.Path
11+import Data.Schematic.Schema
12+import Data.Scientific
13+import Data.Singletons.Prelude
14+import Data.Singletons.TypeLits
15+import Data.Text as T
16+import Data.Traversable
17+import Data.Union
18+import Data.Vector as V
19+import Data.Vinyl
20+import Data.Vinyl.TypeLevel
21+import Prelude as P
22+import Text.Regex.TDFA
23+
24+
25+type Validation a = ValidationT ErrorMap Identity a
26+
27+type ErrorMap = MonoidMap Text [Text]
28+
29+data ParseResult a
30+ = Valid a
31+ | DecodingError Text -- static
32+ | ValidationError ErrorMap -- runtime
33+ deriving (Show, Eq, Functor, Foldable, Traversable)
34+
35+instance (TopLevel a, SingI a, FromJSON (JsonRepr a))
36+ => FromJSON (ParseResult (JsonRepr a)) where
37+ parseJSON = pure . parseAndValidateJson @a
38+
39+isValid :: ParseResult a -> Bool
40+isValid (Valid _) = True
41+isValid _ = False
42+
43+isDecodingError :: ParseResult a -> Bool
44+isDecodingError (DecodingError _) = True
45+isDecodingError _ = False
46+
47+isValidationError :: ParseResult a -> Bool
48+isValidationError (ValidationError _) = True
49+isValidationError _ = False
50+
51+validateTextConstraint
52+ :: JSONPath
53+ -> Text
54+ -> Sing (tcs :: TextConstraint)
55+ -> Validation ()
56+validateTextConstraint (JSONPath path) t = \case
57+ STEq n -> do
58+ let
59+ nlen = withKnownNat n $ natVal n
60+ predicate = nlen == (fromIntegral $ T.length t)
61+ errMsg = "length should be == " <> T.pack (show nlen)
62+ warn = vWarning $ mmSingleton path (pure errMsg)
63+ unless predicate warn
64+ STLt n -> do
65+ let
66+ nlen = withKnownNat n $ natVal n
67+ predicate = nlen > (fromIntegral $ T.length t)
68+ errMsg = "length should be < " <> T.pack (show nlen)
69+ warn = vWarning $ mmSingleton path (pure errMsg)
70+ unless predicate warn
71+ STLe n -> do
72+ let
73+ nlen = withKnownNat n $ natVal n
74+ predicate = nlen >= (fromIntegral $ T.length t)
75+ errMsg = "length should be <= " <> T.pack (show nlen)
76+ warn = vWarning $ mmSingleton path (pure errMsg)
77+ unless predicate warn
78+ STGt n -> do
79+ let
80+ nlen = withKnownNat n $ natVal n
81+ predicate = nlen < (fromIntegral $ T.length t)
82+ errMsg = "length should be > " <> T.pack (show nlen)
83+ warn = vWarning $ mmSingleton path (pure errMsg)
84+ unless predicate warn
85+ STGe n -> do
86+ let
87+ nlen = withKnownNat n $ natVal n
88+ predicate = nlen <= (fromIntegral $ T.length t)
89+ errMsg = "length should be >= " <> T.pack (show nlen)
90+ warn = vWarning $ mmSingleton path (pure errMsg)
91+ unless predicate warn
92+ STRegex r -> do
93+ let
94+ regex = withKnownSymbol r $ fromSing r
95+ predicate = matchTest (makeRegex (T.unpack regex) :: Regex) (T.unpack t)
96+ errMsg = "must match " <> regex
97+ warn = vWarning $ mmSingleton path (pure errMsg)
98+ unless predicate warn
99+ STEnum ss -> do
100+ let
101+ matching :: Sing (s :: [Symbol]) -> Bool
102+ matching SNil = False
103+ matching (SCons s@SSym fs) = T.pack (symbolVal s) == t || matching fs
104+ errMsg = "must be one of " <> T.pack (show (fromSing ss))
105+ warn = vWarning $ mmSingleton path (pure errMsg)
106+ unless (matching ss) warn
107+
108+validateNumberConstraint
109+ :: JSONPath
110+ -> Scientific
111+ -> Sing (tcs :: NumberConstraint)
112+ -> Validation ()
113+validateNumberConstraint (JSONPath path) num = \case
114+ SNEq n -> do
115+ let
116+ nlen = withKnownNat n $ natVal n
117+ predicate = fromIntegral nlen == num
118+ errMsg = "should be == " <> T.pack (show nlen)
119+ warn = vWarning $ mmSingleton path (pure errMsg)
120+ unless predicate warn
121+ SNGt n -> do
122+ let
123+ nlen = withKnownNat n $ natVal n
124+ predicate = num > fromIntegral nlen
125+ errMsg = "should be > " <> T.pack (show nlen)
126+ warn = vWarning $ mmSingleton path (pure errMsg)
127+ unless predicate warn
128+ SNGe n -> do
129+ let
130+ nlen = withKnownNat n $ natVal n
131+ predicate = num >= fromIntegral nlen
132+ errMsg = "should be >= " <> T.pack (show nlen)
133+ warn = vWarning $ mmSingleton path (pure errMsg)
134+ unless predicate warn
135+ SNLt n -> do
136+ let
137+ nlen = withKnownNat n $ natVal n
138+ predicate = num < fromIntegral nlen
139+ errMsg = "should be < " <> T.pack (show nlen)
140+ warn = vWarning $ mmSingleton path (pure errMsg)
141+ unless predicate warn
142+ SNLe n -> do
143+ let
144+ nlen = withKnownNat n $ natVal n
145+ predicate = num <= fromIntegral nlen
146+ errMsg = "should be <= " <> T.pack (show nlen)
147+ warn = vWarning $ mmSingleton path (pure errMsg)
148+ unless predicate warn
149+
150+validateArrayConstraint
151+ :: JSONPath
152+ -> V.Vector a
153+ -> Sing (tcs :: ArrayConstraint)
154+ -> Validation ()
155+validateArrayConstraint (JSONPath path) v = \case
156+ SAEq n -> do
157+ let
158+ nlen = withKnownNat n $ natVal n
159+ predicate = nlen == fromIntegral (V.length v)
160+ errMsg = "length should be == " <> T.pack (show nlen)
161+ warn = vWarning $ mmSingleton path (pure errMsg)
162+ unless predicate warn
163+ SAGt n -> do
164+ let
165+ nlen = withKnownNat n $ natVal n
166+ predicate = fromIntegral (V.length v) > nlen
167+ errMsg = "length should be > " <> T.pack (show nlen)
168+ warn = vWarning $ mmSingleton path (pure errMsg)
169+ unless predicate warn
170+ SAGe n -> do
171+ let
172+ nlen = withKnownNat n $ natVal n
173+ predicate = fromIntegral (V.length v) >= nlen
174+ errMsg = "length should be >= " <> T.pack (show nlen)
175+ warn = vWarning $ mmSingleton path (pure errMsg)
176+ unless predicate warn
177+ SALt n -> do
178+ let
179+ nlen = withKnownNat n $ natVal n
180+ predicate = fromIntegral (V.length v) < nlen
181+ errMsg = "length should be < " <> T.pack (show nlen)
182+ warn = vWarning $ mmSingleton path (pure errMsg)
183+ unless predicate warn
184+ SALe n -> do
185+ let
186+ nlen = withKnownNat n $ natVal n
187+ predicate = fromIntegral (V.length v) <= nlen
188+ errMsg = "length should be <= " <> T.pack (show nlen)
189+ warn = vWarning $ mmSingleton path (pure errMsg)
190+ unless predicate warn
191+
192+validateJsonRepr
193+ :: Sing schema
194+ -> [DemotedPathSegment]
195+ -> JsonRepr schema
196+ -> Validation ()
197+validateJsonRepr sschema dpath jr = case jr of
198+ ReprText t -> case sschema of
199+ SSchemaText scs -> do
200+ let
201+ process :: Sing (cs :: [TextConstraint]) -> Validation ()
202+ process SNil = pure ()
203+ process (SCons c cs) = do
204+ validateTextConstraint (demotedPathToText dpath) t c
205+ process cs
206+ process scs
207+ ReprNumber n -> case sschema of
208+ SSchemaNumber scs -> do
209+ let
210+ process :: Sing (cs :: [NumberConstraint]) -> Validation ()
211+ process SNil = pure ()
212+ process (SCons c cs) = do
213+ validateNumberConstraint (demotedPathToText dpath) n c
214+ process cs
215+ process scs
216+ ReprNull -> pure ()
217+ ReprBoolean _ -> pure ()
218+ ReprArray v -> case sschema of
219+ SSchemaArray acs s -> do
220+ let
221+ process :: Sing (cs :: [ArrayConstraint]) -> Validation ()
222+ process SNil = pure ()
223+ process (SCons c cs) = do
224+ validateArrayConstraint (demotedPathToText dpath) v c
225+ process cs
226+ process acs
227+ for_ (V.indexed v) $ \(ix, jr') -> do
228+ let newPath = dpath <> pure (DIx $ fromIntegral ix)
229+ validateJsonRepr s newPath jr'
230+ ReprOptional d -> case sschema of
231+ SSchemaOptional ss -> case d of
232+ Just x -> validateJsonRepr ss dpath x
233+ Nothing -> pure ()
234+ ReprObject fs -> case sschema of
235+ SSchemaObject _ -> go fs
236+ where
237+ go :: Rec FieldRepr (ts :: [(Symbol, Schema)] ) -> Validation ()
238+ go RNil = pure ()
239+ go (f@(FieldRepr d) :& ftl) = do
240+ let newPath = dpath <> [DKey (knownFieldName f)]
241+ validateJsonRepr (knownFieldSchema f) newPath d
242+ go ftl
243+ ReprUnion _ -> pure () -- FIXME
244+ -- case sschema of
245+ -- SSchemaUnion ss -> case ss of
246+ -- SCons s stl -> case umatch' s u of
247+ -- Nothing -> case urestrict u of
248+ -- Nothing ->
249+ -- fail "impossible to produce subUnion, please report this as a bug"
250+ -- Just x -> do
251+ -- let
252+ -- JSONPath path = demotedPathToText dpath
253+ -- case stl of
254+ -- SNil -> void $ vWarning $ mmSingleton path
255+ -- $ pure "union handling error, please report this as bug"
256+ -- SCons s' stl' ->
257+ -- validateJsonRepr (SSchemaUnion (SCons s' stl')) dpath
258+ -- $ toUnion (SCons s' stl') x
259+ -- Just x -> validateJsonRepr s dpath x
260+
261+-- subUnion
262+-- :: Sing (s ': stl)
263+-- -> ( USubset stl (s ': stl) (RImage stl (s ': stl))
264+-- => Union f (s ': stl)
265+-- -> Maybe (Union f stl) )
266+-- subUnion (SCons s stl) = urestrict
267+
268+-- withUSubset
269+-- :: Sing (s ': stl)
270+-- -> (USubset stl (s ': stl) (RImage stl (s ': stl)) => Maybe (Union f stl))
271+-- -> Maybe (Union f stl)
272+-- withUSubset (SCons s stl) r = r
273+
274+toUnion
275+ :: USubset s' (s ': ss) (RImage s' (s ': ss))
276+ => Sing (s ': ss)
277+ -> Union JsonRepr s'
278+ -> JsonRepr ('SchemaUnion (s ': ss))
279+toUnion _ = ReprUnion . urelax
280+
281+umatch' :: UElem a as i => Sing a -> Union f as -> Maybe (f a)
282+umatch' _ u = umatch u
283+
284+parseAndValidateJson
285+ :: forall schema
286+ . (FromJSON (JsonRepr schema), TopLevel schema, SingI schema)
287+ => Value
288+ -> ParseResult (JsonRepr schema)
289+parseAndValidateJson v =
290+ case parseEither parseJSON v of
291+ Left s -> DecodingError $ T.pack s
292+ Right jsonRepr ->
293+ let
294+ validate = validateJsonRepr (sing :: Sing schema) [] jsonRepr
295+ res = runIdentity . runValidationTEither $ validate
296+ in case res of
297+ Left em -> ValidationError em
298+ Right () -> Valid jsonRepr
299+
300+parseAndValidateJsonBy
301+ :: (FromJSON (JsonRepr schema), TopLevel schema, SingI schema)
302+ => proxy schema
303+ -> Value
304+ -> ParseResult (JsonRepr schema)
305+parseAndValidateJsonBy _ = parseAndValidateJson
src/Data/Schematic/Verifier.hsnew file+5
@@ -0,0 +1,5 @@
1+module Data.Schematic.Verifier (module X) where
2+
3+import Data.Schematic.Verifier.Array as X
4+import Data.Schematic.Verifier.Number as X
5+import Data.Schematic.Verifier.Text as X
src/Data/Schematic/Verifier/Array.hsnew file+14
@@ -0,0 +1,14 @@
1+module Data.Schematic.Verifier.Array where
2+
3+import {-# SOURCE #-} Data.Schematic.Schema
4+import Data.Schematic.Verifier.Common
5+
6+data VerifiedArrayConstraint =
7+ VAEq Integer
8+ deriving (Show)
9+
10+verifyArrayConstraint ::
11+ [DemotedArrayConstraint] -> Maybe (Maybe VerifiedArrayConstraint)
12+verifyArrayConstraint cs = do
13+ x <- verifyDNEq [x | DAEq x <- cs]
14+ pure $ VAEq <$> x
src/Data/Schematic/Verifier/Common.hsnew file+43
@@ -0,0 +1,43 @@
1+module Data.Schematic.Verifier.Common where
2+
3+import Data.List (nub)
4+
5+simplifyNumberConstraint :: ([Integer] -> Integer) -> [Integer] -> Maybe Integer
6+simplifyNumberConstraint f =
7+ \case
8+ [] -> Nothing
9+ x -> Just $ f x
10+
11+simplifyDNLs :: [Integer] -> Maybe Integer
12+simplifyDNLs = simplifyNumberConstraint minimum
13+
14+simplifyDNGs :: [Integer] -> Maybe Integer
15+simplifyDNGs = simplifyNumberConstraint maximum
16+
17+verifyDNEq :: [Integer] -> Maybe (Maybe Integer)
18+verifyDNEq x =
19+ case nub x of
20+ [] -> Just Nothing
21+ [y] -> Just $ Just y
22+ (_:_:_) -> Nothing
23+
24+verify3 :: Maybe Integer -> Maybe Integer -> Maybe Integer -> Maybe ()
25+verify3 (Just x) (Just y) (Just z) =
26+ if x < y && y < z
27+ then Just ()
28+ else Nothing
29+verify3 _ _ _ = Just ()
30+
31+verify2 :: Maybe Integer -> Maybe Integer -> Maybe ()
32+verify2 (Just x) (Just y) =
33+ if x < y
34+ then Just ()
35+ else Nothing
36+verify2 _ _ = Just ()
37+
38+verifyEquations :: Maybe Integer -> Maybe Integer -> Maybe Integer -> Maybe ()
39+verifyEquations mgt meq mlt = do
40+ verify3 mgt meq mlt
41+ verify2 mgt meq
42+ verify2 meq mlt
43+ verify2 mgt mlt
src/Data/Schematic/Verifier/Number.hsnew file+31
@@ -0,0 +1,31 @@
1+module Data.Schematic.Verifier.Number where
2+
3+import {-# SOURCE #-} Data.Schematic.Schema
4+import Data.Schematic.Verifier.Common
5+
6+toStrictNumber :: [DemotedNumberConstraint] -> [DemotedNumberConstraint]
7+toStrictNumber = map f
8+ where
9+ f (DNLe x) = DNLt (x + 1)
10+ f (DNGe x) = DNGt (x - 1)
11+ f x = x
12+
13+data VerifiedNumberConstraint
14+ = VNEq Integer
15+ | VNBounds (Maybe Integer) (Maybe Integer)
16+ deriving (Show)
17+
18+verifyNumberConstraints
19+ :: [DemotedNumberConstraint]
20+ -> Maybe VerifiedNumberConstraint
21+verifyNumberConstraints cs' = do
22+ let
23+ cs = toStrictNumber cs'
24+ mlt = simplifyDNLs [x | DNLt x <- cs]
25+ mgt = simplifyDNGs [x | DNGt x <- cs]
26+ meq <- verifyDNEq [x | DNEq x <- cs]
27+ verifyEquations mgt meq mlt
28+ Just $
29+ case meq of
30+ Just eq -> VNEq eq
31+ Nothing -> VNBounds mgt mlt
src/Data/Schematic/Verifier/Text.hsnew file+121
@@ -0,0 +1,121 @@
1+module Data.Schematic.Verifier.Text where
2+
3+import Control.Monad
4+import Data.Maybe
5+import {-# SOURCE #-} Data.Schematic.Schema
6+import Data.Schematic.Verifier.Common
7+import Data.Text (Text, unpack)
8+import Text.Regex.TDFA.Pattern
9+import Text.Regex.TDFA.ReadRegex (parseRegex)
10+
11+toStrictTextLength :: [DemotedTextConstraint] -> [DemotedTextConstraint]
12+toStrictTextLength = map f
13+ where
14+ f (DTLe x) = DTLt (x + 1)
15+ f (DTGe x) = DTGt (x - 1)
16+ f x = x
17+
18+data VerifiedTextConstraint
19+ = VTEq Integer
20+ | VTBounds (Maybe Integer) (Maybe Integer)
21+ | VTRegex Text Integer (Maybe Integer)
22+ | VTEnum [Text]
23+ deriving (Show)
24+
25+verifyTextLengthConstraints
26+ :: [DemotedTextConstraint]
27+ -> Maybe (Maybe VerifiedTextConstraint)
28+verifyTextLengthConstraints cs' = do
29+ let
30+ cs = toStrictTextLength cs'
31+ mlt = simplifyDNLs [x | DTLt x <- cs]
32+ mgt = simplifyDNGs [x | DTGt x <- cs]
33+ meq <- verifyDNEq [x | DTEq x <- cs]
34+ verifyEquations mgt meq mlt
35+ case all isNothing ([mgt, meq, mlt] :: [Maybe Integer]) of
36+ True -> Just Nothing
37+ _ ->
38+ Just $
39+ Just $
40+ case meq of
41+ Just eq -> VTEq eq
42+ Nothing -> VTBounds mgt mlt
43+
44+regexLength :: Text -> Maybe (Int, Maybe Int)
45+regexLength regexp =
46+ case parseRegex . unpack $ regexp of
47+ Right (p, _) -> Just (minRegexLength p, maxRegexLength p)
48+ Left _ -> Nothing
49+
50+minRegexLength :: Pattern -> Int
51+minRegexLength p =
52+ case p of
53+ PEmpty -> 0
54+ PChar {..} -> 1
55+ PAny {..} -> 1
56+ PAnyNot {..} -> 1
57+ PQuest _ -> 0
58+ PPlus sch -> minRegexLength $ PBound 1 Nothing sch
59+ PStar _ sch -> minRegexLength $ PBound 0 Nothing sch
60+ PBound low _ sch -> low * minRegexLength sch
61+ PConcat ps -> sum $ fmap minRegexLength ps
62+ POr xs -> minimum $ fmap minRegexLength xs
63+ PDot _ -> 1
64+ PEscape {..} -> 1
65+ PCarat _ -> 0
66+ PDollar _ -> 0
67+ _ -> 0
68+
69+maxRegexLength :: Pattern -> Maybe Int
70+maxRegexLength p =
71+ case p of
72+ PEmpty -> Just 0
73+ PChar _ _ -> Just 1
74+ PAny _ _ -> Just 1
75+ PAnyNot _ _ -> Just 1
76+ PQuest _ -> Just 0
77+ PPlus _ -> Nothing
78+ PStar _ _ -> Nothing
79+ PBound _ mhigh sch -> (*) <$> mhigh <*> maxRegexLength sch
80+ PConcat ps -> sum <$> mapM maxRegexLength ps
81+ POr xs -> maximum <$> mapM maxRegexLength xs
82+ PDot _ -> Just 1
83+ PEscape _ _ -> Just 1
84+ PCarat _ -> Just 0
85+ PDollar _ -> Just 0
86+ _ -> Just 0
87+
88+verifyTextRegexConstraint
89+ :: [DemotedTextConstraint]
90+ -> Maybe (Maybe VerifiedTextConstraint)
91+verifyTextRegexConstraint cs = do
92+ let regexps = [x | DTRegex x <- cs]
93+ case regexps of
94+ [] -> Just Nothing
95+ [x] -> do
96+ (l, mh) <- regexLength x
97+ Just $ Just $ VTRegex x (fromIntegral l) (fromIntegral <$> mh)
98+ _ -> Nothing
99+
100+verifyTextEnumConstraint
101+ :: [DemotedTextConstraint]
102+ -> Maybe (Maybe VerifiedTextConstraint)
103+verifyTextEnumConstraint cs = do
104+ let enums = concat [x | DTEnum x <- cs]
105+ case enums of
106+ [] -> Just Nothing
107+ x -> Just $ Just $ VTEnum x
108+
109+verifyTextConstraints
110+ :: [DemotedTextConstraint]
111+ -> Maybe [VerifiedTextConstraint]
112+verifyTextConstraints cs = do
113+ regexp <- verifyTextRegexConstraint cs
114+ void $
115+ case regexp of
116+ Just (VTRegex _ l mh) ->
117+ verifyTextLengthConstraints (DTGe l : cs ++ maybeToList (DTLe <$> mh))
118+ _ -> pure Nothing
119+ lengths <- verifyTextLengthConstraints cs
120+ enums <- verifyTextEnumConstraint cs
121+ return $ catMaybes [lengths, enums, regexp]
stack-13.7.yamlnew file+5
@@ -0,0 +1,5 @@
1+resolver: lts-13.7
2+extra-deps:
3+ - hjsonpointer-1.4.0@rev:0
4+ - hjsonschema-1.9.0@rev:0
5+ - validationt-0.2.1.0
stack.yaml+5−66
@@ -1,66 +1,5 @@
1−# This file was automatically generated by 'stack init'
1+resolver: lts-12.0
2−#
3−# Some commonly used options have been documented as comments in this file.
4−# For advanced use and comprehensive documentation of the format, please see:
5−# http://docs.haskellstack.org/en/stable/yaml_configuration/
6−
7−# Resolver to choose a 'specific' stackage snapshot or a compiler version.
8−# A snapshot resolver dictates the compiler version and the set of packages
9−# to be used for project dependencies. For example:
10−#
11−# resolver: lts-3.5
12−# resolver: nightly-2015-09-21
13−# resolver: ghcjs-0.1.0_ghc-7.10.2
14−# resolver:
15−# name: custom-snapshot
16−# location: "./custom-snapshot.yaml"
17−resolver: lts-8.12
18−#resolver: ghc-8.0.2
19−
20−# User packages to be built.
21−# Various formats can be used as shown in the example below.
22−#
23−# packages:
24−# - some-directory
25−# - https://example.com/foo/bar/baz-0.0.2.tar.gz
26−# - location:
27−# git: https://github.com/commercialhaskell/stack.git
28−# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
29−# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
30−# extra-dep: true
2+extra-deps:
31−# subdirs:
3+ - hjsonpointer-1.4.0@rev:0
32−# - auto-update
4+ - hjsonschema-1.9.0@rev:0
33−# - wai
5+ - validationt-0.2.1.0
34−#
35−# A package marked 'extra-dep: true' will only be built if demanded by a
36−# non-dependency (i.e. a user package), and its test suites and benchmarks
37−# will not be run. This is useful for tweaking upstream packages.
38−packages:
39−- '.'
40−# Dependency packages to be pulled from upstream that are not in the resolver
41−# (e.g., acme-missiles-0.3)
42−extra-deps: []
43−
44−# Override default flag values for local packages and extra-deps
45−flags: {}
46−
47−# Extra package databases containing global packages
48−extra-package-dbs: []
49−
50−# Control whether we use the GHC we find on the path
51−# system-ghc: true
52−#
53−# Require a specific version of stack, using version ranges
54−# require-stack-version: -any # Default
55−# require-stack-version: ">=1.4"
56−#
57−# Override the architecture used by stack, especially useful on Windows
58−# arch: i386
59−# arch: x86_64
60−#
61−# Extra directories used by stack for building
62−# extra-include-dirs: [/path/to/dir]
63−# extra-lib-dirs: [/path/to/dir]
64−#
65−# Allow a newer minor version of GHC than the snapshot specifies
66−# compiler-check: newer-minor
test/HelpersSpec.hsnew file+124
@@ -0,0 +1,124 @@
1+{-# OPTIONS_GHC -Wno-unticked-promoted-constructors #-}
2+
3+{-# LANGUAGE LambdaCase #-}
4+
5+{-# LANGUAGE DataKinds #-}
6+{-# LANGUAGE TypeApplications #-}
7+{-# LANGUAGE OverloadedStrings #-}
8+
9+module HelpersSpec (spec, main) where
10+
11+import Control.Lens
12+import Data.ByteString.Lazy.Lens
13+import Data.Foldable
14+import Data.Monoid
15+import Data.Schematic
16+import Data.Text as T
17+import Data.Text.Lens
18+import Test.Hspec
19+
20+
21+type UUIDSchema = 'SchemaObject '[ '("uuid", 'SchemaText IsUUID) ]
22+
23+-- | Taken from UUID RFC 4122
24+uuid :: Text
25+uuid = "f81d4fae-7dec-11d0-a765-00a0c91e6bf6"
26+
27+type ISO8601DateSchema = 'SchemaObject '[ '("date", 'SchemaText IsDate) ]
28+
29+iso8601dates :: [Text]
30+iso8601dates = [ "1985-04-12" ]
31+
32+invalidIso8601dates :: [Text]
33+invalidIso8601dates = [ "1999-13-12" ]
34+
35+type ISO8601TimeSchema = 'SchemaObject '[ '("time", 'SchemaText IsTime) ]
36+
37+iso8601times :: [Text]
38+iso8601times =
39+ [ "19:23:00"
40+ , "00:00:00"
41+ , "23:47:12" ]
42+
43+invalidIso8601times :: [Text]
44+invalidIso8601times =
45+ [ "00:60:00"
46+ , "24:01:02" ]
47+
48+type ISO8601DateTimeSchema = 'SchemaObject '[ '("datetime", 'SchemaText IsDateTime) ]
49+
50+-- | Taken from ISO8601 RFC 3339
51+iso8601datetimes :: [Text]
52+iso8601datetimes =
53+ iso8601dates <>
54+ [ "1985-04-12T23:20:50.52Z"
55+ , "1996-12-19T16:39:57-08:00"
56+ , "1990-12-31T23:59:60Z"
57+ , "1990-12-31T15:59:60-08:00"
58+ , "1937-01-01T12:00:27.87+00:20"
59+ ]
60+
61+invalidIso8601datetimes :: [Text]
62+invalidIso8601datetimes =
63+ [ "1996-13-129T16:39:57-08:00"
64+ , "1990-2-31T23:59:60Z"
65+ , "1990-12-32T15:59:70"
66+ , "1937-01-1T12::27.87+24:20"
67+ ]
68+
69+spec :: Spec
70+spec = do
71+ describe "UUID: " $ do
72+ it "validates correct UUID" $ do
73+ let
74+ uuidJson = "{\"uuid\": \"" <> (uuid ^. unpacked . packedChars) <> "\" }"
75+ (decodeAndValidateJson uuidJson :: ParseResult (JsonRepr UUIDSchema))
76+ `shouldSatisfy` isValid
77+
78+ it "fails to validate incorrect UUID" $ do
79+ let
80+ incorrectJson = "{\"uuid\": \"incorrect\" }"
81+ (decodeAndValidateJson incorrectJson :: ParseResult (JsonRepr UUIDSchema))
82+ `shouldSatisfy` isValidationError
83+
84+ describe "ISO8601 date: " $ do
85+ for_ iso8601dates $ \dt -> do
86+ it ("validates correct date - " <> dt ^. unpacked) $ do
87+ let json = "{\"date\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
88+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601DateSchema))
89+ `shouldSatisfy` isValid
90+
91+ for_ invalidIso8601dates $ \dt -> do
92+ it ("fails to validate incorrect date - " <> dt ^. unpacked) $ do
93+ let json = "{\"date\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
94+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601DateSchema))
95+ `shouldSatisfy` isValidationError
96+
97+ describe "ISO8601 time: " $ do
98+ for_ iso8601times $ \dt -> do
99+ it ("validates correct time - " <> dt ^. unpacked) $ do
100+ let json = "{\"time\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
101+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601TimeSchema))
102+ `shouldSatisfy` isValid
103+
104+ for_ invalidIso8601times $ \dt -> do
105+ it ("fails to validate incorrect time - " <> dt ^. unpacked) $ do
106+ let json = "{\"time\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
107+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601TimeSchema))
108+ `shouldSatisfy` isValidationError
109+
110+ describe "ISO8601 datetime: " $ do
111+ for_ iso8601datetimes $ \dt -> do
112+ it ("validates correct datetime - " <> dt ^. unpacked) $ do
113+ let json = "{\"datetime\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
114+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601DateTimeSchema))
115+ `shouldSatisfy` isValid
116+
117+ for_ invalidIso8601datetimes $ \dt -> do
118+ it ("fails to validate incorrect datetime - " <> dt ^. unpacked) $ do
119+ let json = "{\"datetime\": \"" <> (dt ^. unpacked . packedChars) <> "\" }"
120+ (decodeAndValidateJson json :: ParseResult (JsonRepr ISO8601DateTimeSchema))
121+ `shouldSatisfy` isValidationError
122+
123+main :: IO ()
124+main = hspec spec
test/JsonSchemaSpec.hsnew file+101
@@ -0,0 +1,101 @@
1+{-# LANGUAGE LambdaCase #-}
2+
3+{-# LANGUAGE DataKinds #-}
4+{-# LANGUAGE TypeApplications #-}
5+{-# LANGUAGE OverloadedLists #-}
6+{-# LANGUAGE OverloadedStrings #-}
7+
8+module JsonSchemaSpec (spec, main) where
9+
10+import Data.Aeson as J
11+import Data.Maybe
12+import Data.Proxy
13+import Data.ByteString.Lazy as B
14+import Data.Schematic
15+import Data.Vinyl
16+import JSONSchema.Draft4 as D4
17+import Test.Hspec
18+
19+
20+type ArraySchema = 'SchemaArray '[ 'AEq 1] ('SchemaNumber '[ 'NGt 10])
21+
22+type ArrayField = '("foo", ArraySchema)
23+
24+type FieldsSchema =
25+ '[ ArrayField, '("bar", 'SchemaOptional ('SchemaText '[ 'TEnum '["foo", "bar"]]))]
26+
27+type SchemaExample = 'SchemaObject FieldsSchema
28+
29+exampleData :: JsonRepr SchemaExample
30+exampleData = withRepr @SchemaExample $
31+ field @"foo" [ReprNumber 13]
32+ :& field @"bar" (pure (ReprText "foo"))
33+ :& RNil
34+
35+type SchemaArrayExample = 'SchemaObject
36+ '[ '("a1", 'SchemaArray '[ 'AGt 1 ] ('SchemaNumber '[]))
37+ , '("a2", 'SchemaArray '[ 'AGe 1 ] ('SchemaNumber '[]))
38+ , '("a3", 'SchemaArray '[ 'ALt 1 ] ('SchemaNumber '[]))
39+ , '("a4", 'SchemaArray '[ 'ALe 1 ] ('SchemaNumber '[]))
40+ ]
41+
42+type SchemaNumberExample = 'SchemaObject
43+ '[ '("n1", 'SchemaNumber '[ 'NGt 1 ])
44+ , '("n2", 'SchemaNumber '[ 'NGe 1 ])
45+ , '("n3", 'SchemaNumber '[ 'NLt 1 ])
46+ , '("n4", 'SchemaNumber '[ 'NLe 1 ])
47+ ]
48+
49+type SchemaTextExample = 'SchemaObject
50+ '[ '("t1", 'SchemaText '[ 'TGt 1 ])
51+ , '("t2", 'SchemaText '[ 'TGe 1 ])
52+ , '("t3", 'SchemaText '[ 'TLt 1 ])
53+ , '("t4", 'SchemaText '[ 'TLe 1 ])
54+ ]
55+
56+spec :: Spec
57+spec = do
58+ it "validates simple schema" $ do
59+ let schema = D4.SchemaWithURI (fromJust $ toJsonSchema (Proxy @SchemaExample)) Nothing
60+ fetchHTTPAndValidate schema (toJSON exampleData) >>= \case
61+ Left _ -> fail "failed to validate test example"
62+ Right _ -> pure ()
63+ it "validates schema with arrays" $ do
64+ let
65+ schema = D4.SchemaWithURI (fromJust $ toJsonSchema (Proxy @SchemaArrayExample)) Nothing
66+ obj = withRepr @SchemaArrayExample $
67+ field @"a1" [ReprNumber 13, ReprNumber 13]
68+ :& field @"a2" [ReprNumber 13]
69+ :& field @"a3" []
70+ :& field @"a4" [ReprNumber 13]
71+ :& RNil
72+ fetchHTTPAndValidate schema (toJSON obj) >>= \case
73+ Left e -> fail "failed to validate test example"
74+ Right _ -> pure ()
75+ it "validates schema with numbers" $ do
76+ let
77+ schema = D4.SchemaWithURI (fromJust $ toJsonSchema (Proxy @SchemaNumberExample)) Nothing
78+ obj = withRepr @SchemaNumberExample $
79+ field @"n1" 1.1
80+ :& field @"n2" 1
81+ :& field @"n3" 0.9
82+ :& field @"n4" 1.0
83+ :& RNil
84+ fetchHTTPAndValidate schema (toJSON obj) >>= \case
85+ Left e -> fail "failed to validate test example"
86+ Right _ -> pure ()
87+ it "validates schema with strings" $ do
88+ let
89+ schema = D4.SchemaWithURI (fromJust $ toJsonSchema (Proxy @SchemaTextExample)) Nothing
90+ obj = withRepr @SchemaTextExample $
91+ field @"t1" "11"
92+ :& field @"t2" "1"
93+ :& field @"t3" ""
94+ :& field @"t4" "1"
95+ :& RNil
96+ fetchHTTPAndValidate schema (toJSON obj) >>= \case
97+ Left e -> fail "failed to validate test example"
98+ Right _ -> pure ()
99+
100+main :: IO ()
101+main = hspec spec
test/LensSpec.hsnew file+318
@@ -0,0 +1,318 @@
1+{-# LANGUAGE DataKinds #-}
2+{-# LANGUAGE TypeApplications #-}
3+{-# LANGUAGE OverloadedLists #-}
4+{-# LANGUAGE OverloadedStrings #-}
5+
6+module LensSpec (spec, main) where
7+
8+import Control.Lens
9+import Data.Proxy
10+import Data.Schematic
11+import Data.Vinyl
12+import Test.Hspec
13+
14+
15+type ArraySchema = 'SchemaArray '[ 'AEq 1] ('SchemaNumber '[ 'NGt 10])
16+
17+type ArrayField = '("foo", ArraySchema)
18+
19+type FieldsSchema =
20+ '[ '("bar", 'SchemaOptional ('SchemaText '[ 'TEnum '["foo", "bar"]])), ArrayField]
21+
22+arrayData :: JsonRepr ArraySchema
23+arrayData = ReprArray [ReprNumber 13]
24+
25+arrayField :: FieldRepr ArrayField
26+arrayField = FieldRepr arrayData
27+
28+objectData :: Rec FieldRepr FieldsSchema
29+objectData = FieldRepr (ReprOptional (Just (ReprText "foo")))
30+ :& FieldRepr arrayData
31+ :& RNil
32+
33+type BigRecord = Rec FieldRepr
34+ '[ '("f1", 'SchemaNumber '[])
35+ , '("f2", 'SchemaNumber '[])
36+ , '("f3", 'SchemaNumber '[])
37+ , '("f4", 'SchemaNumber '[])
38+ , '("f5", 'SchemaNumber '[])
39+ , '("f6", 'SchemaNumber '[])
40+ , '("f7", 'SchemaNumber '[])
41+ , '("f8", 'SchemaNumber '[])
42+ , '("f9", 'SchemaNumber '[])
43+ , '("f10", 'SchemaNumber '[])
44+ , '("f11", 'SchemaNumber '[])
45+ , '("f12", 'SchemaNumber '[])
46+ , '("f13", 'SchemaNumber '[])
47+ , '("f14", 'SchemaNumber '[])
48+ , '("f15", 'SchemaNumber '[])
49+ , '("f16", 'SchemaNumber '[])
50+ , '("f17", 'SchemaNumber '[])
51+ , '("f18", 'SchemaNumber '[])
52+ , '("f19", 'SchemaNumber '[])
53+ , '("f20", 'SchemaNumber '[])
54+ , '("f21", 'SchemaNumber '[])
55+ , '("f22", 'SchemaNumber '[])
56+ , '("f23", 'SchemaNumber '[])
57+ , '("f24", 'SchemaNumber '[])
58+ , '("f25", 'SchemaNumber '[])
59+ , '("f26", 'SchemaNumber '[])
60+ , '("f27", 'SchemaNumber '[])
61+ , '("f28", 'SchemaNumber '[])
62+ , '("f29", 'SchemaNumber '[])
63+ , '("f30", 'SchemaNumber '[])
64+ , '("f31", 'SchemaNumber '[])
65+ , '("f32", 'SchemaNumber '[])
66+ , '("f33", 'SchemaNumber '[])
67+ , '("f34", 'SchemaNumber '[])
68+ , '("f35", 'SchemaNumber '[])
69+ , '("f36", 'SchemaNumber '[])
70+ , '("f37", 'SchemaNumber '[])
71+ , '("f38", 'SchemaNumber '[])
72+ , '("f39", 'SchemaNumber '[])
73+ , '("f40", 'SchemaNumber '[])
74+ , '("f41", 'SchemaNumber '[])
75+ , '("f42", 'SchemaNumber '[])
76+ , '("f43", 'SchemaNumber '[])
77+ , '("f44", 'SchemaNumber '[])
78+ , '("f45", 'SchemaNumber '[])
79+ , '("f46", 'SchemaNumber '[])
80+ , '("f47", 'SchemaNumber '[])
81+ , '("f48", 'SchemaNumber '[])
82+ , '("f49", 'SchemaNumber '[])
83+ , '("f50", 'SchemaNumber '[])
84+ , '("f51", 'SchemaNumber '[])
85+ , '("f52", 'SchemaNumber '[])
86+ , '("f53", 'SchemaNumber '[])
87+ , '("f54", 'SchemaNumber '[])
88+ , '("f55", 'SchemaNumber '[])
89+ , '("f56", 'SchemaNumber '[])
90+ , '("f57", 'SchemaNumber '[])
91+ , '("f58", 'SchemaNumber '[])
92+ , '("f59", 'SchemaNumber '[])
93+ , '("f60", 'SchemaNumber '[])
94+ , '("f61", 'SchemaNumber '[])
95+ , '("f62", 'SchemaNumber '[])
96+ , '("f63", 'SchemaNumber '[])
97+ , '("f64", 'SchemaNumber '[])
98+ , '("f65", 'SchemaNumber '[])
99+ , '("f66", 'SchemaNumber '[])
100+ , '("f67", 'SchemaNumber '[])
101+ , '("f68", 'SchemaNumber '[])
102+ , '("f69", 'SchemaNumber '[])
103+ , '("f70", 'SchemaNumber '[])
104+ , '("f71", 'SchemaNumber '[])
105+ , '("f72", 'SchemaNumber '[])
106+ , '("f73", 'SchemaNumber '[])
107+ , '("f74", 'SchemaNumber '[])
108+ , '("f75", 'SchemaNumber '[])
109+ , '("f76", 'SchemaNumber '[])
110+ , '("f77", 'SchemaNumber '[])
111+ , '("f78", 'SchemaNumber '[])
112+ , '("f79", 'SchemaNumber '[])
113+ , '("f80", 'SchemaNumber '[])
114+ , '("f81", 'SchemaNumber '[])
115+ , '("f82", 'SchemaNumber '[])
116+ , '("f83", 'SchemaNumber '[])
117+ , '("f84", 'SchemaNumber '[])
118+ , '("f85", 'SchemaNumber '[])
119+ , '("f86", 'SchemaNumber '[])
120+ , '("f87", 'SchemaNumber '[])
121+ , '("f88", 'SchemaNumber '[])
122+ , '("f89", 'SchemaNumber '[])
123+ , '("f90", 'SchemaNumber '[])
124+ , '("f91", 'SchemaNumber '[])
125+ , '("f92", 'SchemaNumber '[])
126+ , '("f93", 'SchemaNumber '[])
127+ , '("f94", 'SchemaNumber '[])
128+ , '("f95", 'SchemaNumber '[])
129+ , '("f96", 'SchemaNumber '[])
130+ , '("f97", 'SchemaNumber '[])
131+ , '("f98", 'SchemaNumber '[])
132+ , '("f99", 'SchemaNumber '[])
133+ , '("f100", 'SchemaNumber '[])
134+ , '("f101", 'SchemaNumber '[])
135+ , '("f102", 'SchemaNumber '[])
136+ , '("f103", 'SchemaNumber '[])
137+ , '("f104", 'SchemaNumber '[])
138+ , '("f105", 'SchemaNumber '[])
139+ , '("f106", 'SchemaNumber '[])
140+ , '("f107", 'SchemaNumber '[])
141+ , '("f108", 'SchemaNumber '[])
142+ , '("f109", 'SchemaNumber '[])
143+ , '("f110", 'SchemaNumber '[])
144+ , '("f111", 'SchemaNumber '[])
145+ , '("f112", 'SchemaNumber '[])
146+ , '("f113", 'SchemaNumber '[])
147+ , '("f114", 'SchemaNumber '[])
148+ , '("f115", 'SchemaNumber '[])
149+ , '("f116", 'SchemaNumber '[])
150+ , '("f117", 'SchemaNumber '[])
151+ , '("f118", 'SchemaNumber '[])
152+ , '("f119", 'SchemaNumber '[])
153+ , '("f120", 'SchemaNumber '[])
154+ , '("f121", 'SchemaNumber '[])
155+ , '("f122", 'SchemaNumber '[])
156+ , '("f123", 'SchemaNumber '[])
157+ , '("f124", 'SchemaNumber '[])
158+ , '("f125", 'SchemaNumber '[])
159+ , '("f126", 'SchemaNumber '[])
160+ , '("f127", 'SchemaNumber '[])
161+ , '("f128", 'SchemaNumber '[])
162+ , '("f129", 'SchemaNumber '[])
163+ , '("f130", 'SchemaNumber '[])
164+ ]
165+
166+_bigRecord :: BigRecord
167+_bigRecord =
168+ FieldRepr (ReprNumber 1)
169+ :& FieldRepr (ReprNumber 2)
170+ :& FieldRepr (ReprNumber 3)
171+ :& FieldRepr (ReprNumber 4)
172+ :& FieldRepr (ReprNumber 5)
173+ :& FieldRepr (ReprNumber 6)
174+ :& FieldRepr (ReprNumber 7)
175+ :& FieldRepr (ReprNumber 8)
176+ :& FieldRepr (ReprNumber 9)
177+ :& FieldRepr (ReprNumber 10)
178+ :& FieldRepr (ReprNumber 11)
179+ :& FieldRepr (ReprNumber 12)
180+ :& FieldRepr (ReprNumber 13)
181+ :& FieldRepr (ReprNumber 14)
182+ :& FieldRepr (ReprNumber 15)
183+ :& FieldRepr (ReprNumber 16)
184+ :& FieldRepr (ReprNumber 17)
185+ :& FieldRepr (ReprNumber 18)
186+ :& FieldRepr (ReprNumber 19)
187+ :& FieldRepr (ReprNumber 20)
188+ :& FieldRepr (ReprNumber 21)
189+ :& FieldRepr (ReprNumber 22)
190+ :& FieldRepr (ReprNumber 23)
191+ :& FieldRepr (ReprNumber 24)
192+ :& FieldRepr (ReprNumber 25)
193+ :& FieldRepr (ReprNumber 26)
194+ :& FieldRepr (ReprNumber 27)
195+ :& FieldRepr (ReprNumber 28)
196+ :& FieldRepr (ReprNumber 29)
197+ :& FieldRepr (ReprNumber 30)
198+ :& FieldRepr (ReprNumber 31)
199+ :& FieldRepr (ReprNumber 32)
200+ :& FieldRepr (ReprNumber 33)
201+ :& FieldRepr (ReprNumber 34)
202+ :& FieldRepr (ReprNumber 35)
203+ :& FieldRepr (ReprNumber 36)
204+ :& FieldRepr (ReprNumber 37)
205+ :& FieldRepr (ReprNumber 38)
206+ :& FieldRepr (ReprNumber 39)
207+ :& FieldRepr (ReprNumber 40)
208+ :& FieldRepr (ReprNumber 41)
209+ :& FieldRepr (ReprNumber 42)
210+ :& FieldRepr (ReprNumber 43)
211+ :& FieldRepr (ReprNumber 44)
212+ :& FieldRepr (ReprNumber 45)
213+ :& FieldRepr (ReprNumber 46)
214+ :& FieldRepr (ReprNumber 47)
215+ :& FieldRepr (ReprNumber 48)
216+ :& FieldRepr (ReprNumber 49)
217+ :& FieldRepr (ReprNumber 50)
218+ :& FieldRepr (ReprNumber 51)
219+ :& FieldRepr (ReprNumber 52)
220+ :& FieldRepr (ReprNumber 53)
221+ :& FieldRepr (ReprNumber 54)
222+ :& FieldRepr (ReprNumber 55)
223+ :& FieldRepr (ReprNumber 56)
224+ :& FieldRepr (ReprNumber 57)
225+ :& FieldRepr (ReprNumber 58)
226+ :& FieldRepr (ReprNumber 59)
227+ :& FieldRepr (ReprNumber 60)
228+ :& FieldRepr (ReprNumber 61)
229+ :& FieldRepr (ReprNumber 62)
230+ :& FieldRepr (ReprNumber 63)
231+ :& FieldRepr (ReprNumber 64)
232+ :& FieldRepr (ReprNumber 65)
233+ :& FieldRepr (ReprNumber 66)
234+ :& FieldRepr (ReprNumber 67)
235+ :& FieldRepr (ReprNumber 68)
236+ :& FieldRepr (ReprNumber 69)
237+ :& FieldRepr (ReprNumber 70)
238+ :& FieldRepr (ReprNumber 71)
239+ :& FieldRepr (ReprNumber 72)
240+ :& FieldRepr (ReprNumber 73)
241+ :& FieldRepr (ReprNumber 74)
242+ :& FieldRepr (ReprNumber 75)
243+ :& FieldRepr (ReprNumber 76)
244+ :& FieldRepr (ReprNumber 77)
245+ :& FieldRepr (ReprNumber 78)
246+ :& FieldRepr (ReprNumber 79)
247+ :& FieldRepr (ReprNumber 80)
248+ :& FieldRepr (ReprNumber 81)
249+ :& FieldRepr (ReprNumber 82)
250+ :& FieldRepr (ReprNumber 83)
251+ :& FieldRepr (ReprNumber 84)
252+ :& FieldRepr (ReprNumber 85)
253+ :& FieldRepr (ReprNumber 86)
254+ :& FieldRepr (ReprNumber 87)
255+ :& FieldRepr (ReprNumber 88)
256+ :& FieldRepr (ReprNumber 89)
257+ :& FieldRepr (ReprNumber 90)
258+ :& FieldRepr (ReprNumber 91)
259+ :& FieldRepr (ReprNumber 92)
260+ :& FieldRepr (ReprNumber 93)
261+ :& FieldRepr (ReprNumber 94)
262+ :& FieldRepr (ReprNumber 95)
263+ :& FieldRepr (ReprNumber 96)
264+ :& FieldRepr (ReprNumber 97)
265+ :& FieldRepr (ReprNumber 98)
266+ :& FieldRepr (ReprNumber 99)
267+ :& FieldRepr (ReprNumber 100)
268+ :& FieldRepr (ReprNumber 101)
269+ :& FieldRepr (ReprNumber 102)
270+ :& FieldRepr (ReprNumber 103)
271+ :& FieldRepr (ReprNumber 104)
272+ :& FieldRepr (ReprNumber 105)
273+ :& FieldRepr (ReprNumber 106)
274+ :& FieldRepr (ReprNumber 107)
275+ :& FieldRepr (ReprNumber 108)
276+ :& FieldRepr (ReprNumber 109)
277+ :& FieldRepr (ReprNumber 110)
278+ :& FieldRepr (ReprNumber 111)
279+ :& FieldRepr (ReprNumber 112)
280+ :& FieldRepr (ReprNumber 113)
281+ :& FieldRepr (ReprNumber 114)
282+ :& FieldRepr (ReprNumber 115)
283+ :& FieldRepr (ReprNumber 116)
284+ :& FieldRepr (ReprNumber 117)
285+ :& FieldRepr (ReprNumber 118)
286+ :& FieldRepr (ReprNumber 119)
287+ :& FieldRepr (ReprNumber 120)
288+ :& FieldRepr (ReprNumber 121)
289+ :& FieldRepr (ReprNumber 122)
290+ :& FieldRepr (ReprNumber 123)
291+ :& FieldRepr (ReprNumber 124)
292+ :& FieldRepr (ReprNumber 125)
293+ :& FieldRepr (ReprNumber 126)
294+ :& FieldRepr (ReprNumber 127)
295+ :& FieldRepr (ReprNumber 128)
296+ :& FieldRepr (ReprNumber 129)
297+ :& FieldRepr (ReprNumber 130)
298+ :& RNil
299+
300+spec :: Spec
301+spec = do
302+ let
303+ newFooVal = FieldRepr $ ReprArray [ReprNumber 15]
304+ fooProxy = Proxy @"foo"
305+ it "gets the field from an object" $ do
306+ fget @"foo" objectData `shouldBe` arrayField
307+ it "sets the object field" $ do
308+ fget @"foo" (fput newFooVal objectData) `shouldBe` newFooVal
309+
310+ describe "(using lens library) " $ do
311+ it "get the field from an object" $ do
312+ objectData ^. flens @"foo" `shouldBe` arrayField
313+ it "sets the object field" $ do
314+ set (flens @"foo") newFooVal objectData ^. flens @"foo"
315+ `shouldBe` newFooVal
316+
317+main :: IO ()
318+main = hspec spec
test/SchemaSpec.hs+108−20
@@ -1,34 +1,122 @@
1+{-# OPTIONS_GHC -fprint-potential-instances #-}
2+
3+{-# LANGUAGE DataKinds #-}
4+{-# LANGUAGE FlexibleContexts #-}
5+{-# LANGUAGE GADTs #-}
6+{-# LANGUAGE OverloadedLists #-}
7+{-# LANGUAGE OverloadedStrings #-}
8+{-# LANGUAGE RankNTypes #-}
9+{-# LANGUAGE ScopedTypeVariables #-}
10+{-# LANGUAGE TypeApplications #-}
11+
1module SchemaSpec (spec, main) where
12module SchemaSpec (spec, main) where
2
13
14+import Control.Lens
15+import Data.Aeson
16+import Data.ByteString.Lazy
17+import Data.Functor.Identity
3import Data.Proxy
18import Data.Proxy
4−import Data.Schematic.Schema
19+import Data.Schematic
20+import Data.Schematic.Generator
21+import Data.Singletons
22+import Data.Tagged
23+import Data.Vinyl
5import Test.Hspec
24import Test.Hspec
25+import Test.Hspec.SmallCheck
26+import Test.SmallCheck as SC
27+import Test.SmallCheck.Drivers as SC
28+import Test.SmallCheck.Series as SC
29+
30+import Debug.Trace
31+
32+type SchemaExample = 'SchemaObject
33+ '[ '("foo", 'SchemaArray '[ 'AEq 1] ('SchemaNumber '[ 'NGt 10]))
34+ , '("bar", 'SchemaOptional ('SchemaText '[ 'TEnum '["foo", "bar"]]))]
35+
36+type SchemaExample2 = 'SchemaObject
37+ '[ '("foo", 'SchemaArray '[ 'AEq 2] ('SchemaText '[ 'TGt 10]))
38+ , '("bar", 'SchemaOptional ('SchemaText '[ 'TRegex "[0-9]+"]))]
39+
40+jsonExample :: JsonRepr SchemaExample
41+jsonExample = withRepr @SchemaExample
42+ $ field @"bar" (Just "bar")
43+ :& field @"foo" [12]
44+ :& RNil
45+
46+type AddQuuz =
47+ 'Migration "add_field_quuz"
48+ '[ 'Diff '[] ('AddKey "quuz" (SchemaNumber '[])) ]
6
49
7−type TextSchema = SText '[LengthEqNat 2]
50+type DeleteQuuz =
51+ 'Migration "remove_field_quuz"
52+ '[ 'Diff '[] ( 'DeleteKey "quuz") ]
8
53
9−type NumberSchema = SNumber '[ Gt 3]
54+type SwapFields =
55+ 'Migration "swap_fields"
56+ '[ 'Diff '[ 'PKey "bar" ] ('Update
57+ ('SchemaArray '[ 'AEq 1] ('SchemaNumber '[ 'NGt 10])))
58+ , 'Diff '[ 'PKey "foo" ] ('Update
59+ ('SchemaOptional ('SchemaText '[ 'TEnum '["foo", "bar"]]))) ]
10
60
11−type ArraySchema = SArray '[ LengthEqNat 3 ] NumberSchema
61+type Migrations = '[ AddQuuz
62+ , DeleteQuuz ]
63+ -- , SwapFields ]
12
64
13−type ObjectSchema
65+type VersionedJson = 'Versioned SchemaExample Migrations
14− = SObject '[ Field "carrier" 'JText '[LengthEqNat 2], Field "number_gt_3" 'JNumber '[Gt 3] ]
66+
67+migrationList :: MigrationList Identity VersionedJson
68+migrationList
69+ = (migrateObject (\r -> Identity $ field @"quuz" 42 :& r))
70+ :&& shrinkObject
71+ -- :&& (migrateObject (\r -> Identity
72+ -- $ field @"foo" (r ^. flens (Proxy @"bar") . _Just . optionalRepr)
73+ -- :& field @"bar" (r ^. flens (Proxy @"foo") . arrayRepr)
74+ -- :& RNil))
75+ :&& MNil
76+
77+schemaJson :: ByteString
78+schemaJson = "{\"foo\": [13], \"bar\": null}"
79+
80+schemaJson2 :: ByteString
81+schemaJson2 = "{\"foo\": [3], \"bar\": null}"
82+
83+schemaJsonSeries :: Monad m => SC.Series m (JsonRepr SchemaExample)
84+schemaJsonSeries = series
85+
86+schemaJsonSeries2 :: Monad m => SC.Series m (JsonRepr SchemaExample2)
87+schemaJsonSeries2 = series
15
88
16spec :: Spec
89spec :: Spec
17spec = do
90spec = do
18− describe "Schema translation: " $ do
91+ -- it "show/read JsonRepr properly" $
19− let
92+ -- read (show example) == example
20− textSchema = SchemaText [LengthEq 2]
93+ it "decode/encode JsonRepr properly" $
21− numberSchema = SchemaNumber [Gt 3]
94+ decode (encode jsonExample) == Just jsonExample
22− arraySchema = SchemaArray [LengthArrEq 3] $ SchemaNumber [Gt 3]
95+ it "validates correct representation" $
23− it "translate string schema"
96+ ((decodeAndValidateJson schemaJson) :: ParseResult (JsonRepr SchemaExample))
24− $ build (Proxy @TextSchema) `shouldBe` textSchema
97+ `shouldSatisfy` isValid
25− it "translates number schema"
98+ it "returns decoding error on structurally incorrect input" $
26− $ build (Proxy @NumberSchema) `shouldBe` numberSchema
99+ ((decodeAndValidateJson "{}") :: ParseResult (JsonRepr SchemaExample))
27− it "translates array schema" $ do
100+ `shouldSatisfy` isDecodingError
28− build (Proxy @ArraySchema) `shouldBe` arraySchema
101+ it "validates incorrect representation" $
29− it "translates object schema" $ do
102+ ((decodeAndValidateJson schemaJson2) :: ParseResult (JsonRepr SchemaExample))
30− build (Proxy @ObjectSchema) `shouldBe`
103+ `shouldSatisfy` isValidationError
31− SchemaObject [("carrier", textSchema), ("number_gt_3", numberSchema)]
104+ -- it "validates versioned json" $ do
105+ -- decodeAndValidateVersionedJson (Proxy @VS) schemaJson
106+ -- `shouldSatisfy` isValid
107+ it "validates versioned json with a migration list" $ do
108+ decodeAndValidateVersionedWithPureMList
109+ (Proxy @VersionedJson)
110+ migrationList
111+ schemaJson
112+ `shouldSatisfy` isValid
113+ it "validates json series" $ property $
114+ SC.over schemaJsonSeries $ \x ->
115+ isValid (parseAndValidateJson @SchemaExample (toJSON x))
116+ it "validates json series 2" $ property $
117+ SC.over schemaJsonSeries2 $ \x ->
118+ isValid (parseAndValidateJson @SchemaExample2 (toJSON x))
119+
32
120
33main :: IO ()
121main :: IO ()
34main = hspec spec
122main = hspec spec