git.iko.soy/bridge
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bridge/src/form/validators.js
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1import { some } from 'lodash';
3import {
4 validateNotEmpty,
5 validatePatq,
6 validateMnemonic,
7 validateHdPath,
8 validatePoint,
9 validateMaximumPatpByteLength,
10 validateOneOf,
11 validateHexString,
12 validateHexLength,
13 validateEthereumAddress,
14 validateGreaterThan,
15 validateEmail,
16 validateNotNullAddress,
17 validateHexPrefix,
18 validateLength,
19} from 'lib/validators';
20import isPromise from 'lib/isPromise';
22const PRIVATE_KEY_CHAR_LENGTH = 64; // 64 hex characters
23const ADDRESS_CHAR_LENGTH = 40; // 40 hex characters
25// iterate over validators, exiting early if there's an error
26const buildValidator = (validators = [], validate) => value => {
27 for (const validator of validators) {
28 try {
29 const error = validator(value);
30 if (error) {
31 return error;
32 }
33 } catch (error) {
34 console.error(error);
35 return error.message;
36 }
37 }
39 if (validate) {
40 // the final validate function can optionally return a promise
41 return validate(value);
42 }
43};
45// maps a validator across an array of values
46export const buildArrayValidator = validator => values => {
47 const errorsOrPromises = values.map(validator);
48 if (some(errorsOrPromises, isPromise)) {
49 return Promise.all(errorsOrPromises);
50 }
52 return errorsOrPromises;
53};
55// error object has errors if some of its fields are
56// 1) an array with any defined values
57// 2) any defined values
58export const hasErrors = iter =>
59 some(iter, v => (Array.isArray(v) ? hasErrors(v) : v !== undefined));
61export const buildPatqValidator = (validators = []) =>
62 buildValidator([validateNotEmpty, validatePatq, ...validators]);
63export const buildMnemonicValidator = () =>
64 buildValidator([validateNotEmpty, validateMnemonic]);
65export const buildCheckboxValidator = mustBe =>
66 buildValidator([
67 validateOneOf(mustBe !== undefined ? [mustBe] : [true, false]),
68 ]);
69export const buildPassphraseValidator = () => buildValidator([]);
70// TODO: validate hdpath format
71export const buildHdPathValidator = () => buildValidator([validateHdPath]);
72export const buildPointValidator = (size = 4, validators = []) =>
73 buildValidator([
74 validateNotEmpty,
75 validateMaximumPatpByteLength(size),
76 validatePoint,
77 ...validators,
78 ]);
79export const buildSelectValidator = options =>
80 buildValidator([validateOneOf(options.map(option => option.value))]);
81export const buildHexValidator = length =>
82 buildValidator([
83 validateNotEmpty,
84 validateHexPrefix,
85 validateHexString,
86 validateHexLength(length),
87 ]);
88export const buildPrivateKeyValidator = () =>
89 buildValidator([
90 validateNotEmpty,
91 validateHexString,
92 validateLength(PRIVATE_KEY_CHAR_LENGTH),
93 ]);
94export const buildUploadValidator = () => buildValidator([validateNotEmpty]);
95export const buildAddressValidator = () =>
96 buildValidator([
97 validateNotEmpty,
98 validateHexPrefix,
99 validateHexString,
100 validateHexLength(ADDRESS_CHAR_LENGTH),
101 validateNotNullAddress,
102 validateEthereumAddress,
103 ]);
104export const buildNumberValidator = (min = 0) =>
105 buildValidator([validateGreaterThan(min)]);
106export const buildEmailValidator = validate =>
107 buildValidator([validateNotEmpty, validateEmail], validate);
109// the form validator is the composition of all of the field validators
110// plus an additional form validator function
111export const composeValidator = (
112 fieldValidators = {},
113 // the default form validator just returns field-level validations
114 formValidator = (values, errors) => errors
115) => {
116 const names = Object.keys(fieldValidators);
118 const fieldLevelValidators = names.map(name => value =>
119 fieldValidators[name](value)
120 );
122 // async reduce errors per-field into an errors object
123 const fieldLevelValidator = values => {
124 const errorsOrPromises = names.map((name, i) =>
125 fieldLevelValidators[i](values[name])
126 );
128 const reduce = errors =>
129 names.reduce(
130 (memo, name, i) => ({
131 ...memo,
132 [name]: errors[i],
133 }),
134 {}
135 );
137 if (some(errorsOrPromises, isPromise)) {
138 // if any of these results are a promise, await them all then reduce
139 return Promise.all(errorsOrPromises).then(reduce);
140 }
142 // otherwise return immediately
143 return reduce(errorsOrPromises);
144 };
146 // the final-form `validate` function
147 // NOTE: if we return a Promise to final-form it will toggle the `validating`
148 // state, which is expected. If our promise resolves immediately, however,
149 // that means our `validating` state flickers the UI and it looks pretty bad.
150 // The solution is to conditionally return a promise only when necessary.
151 return values => {
152 // ask for field-level errors
153 const errorsOrPromise = fieldLevelValidator(values);
155 // pass the current values and their validity to the form-level validator
156 // that can implement conditional logic and more complex validations
157 const runFormValidator = errors => formValidator(values, errors);
159 if (isPromise(errorsOrPromise)) {
160 // if promise, promise
161 return errorsOrPromise.then(runFormValidator);
162 }
164 // otherwise, it's an errors object
165 return runFormValidator(errorsOrPromise);
166 };
167};