mirror of
https://github.com/hasura/graphql-engine.git
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94f3ad041c
https://github.com/hasura/graphql-engine-mono/pull/2269 GitOrigin-RevId: c4ea0cc41a1c66d418219cc1d41bf95656426733
290 lines
11 KiB
Haskell
290 lines
11 KiB
Haskell
module Hasura.RQL.DDL.EventTrigger
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( CreateEventTriggerQuery
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, runCreateEventTriggerQuery
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, DeleteEventTriggerQuery
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, runDeleteEventTriggerQuery
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, dropEventTriggerInMetadata
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, RedeliverEventQuery
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, runRedeliverEvent
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, InvokeEventTriggerQuery
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, runInvokeEventTrigger
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-- TODO(from master): review
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, archiveEvents
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) where
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import Hasura.Prelude
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import qualified Data.ByteString.Lazy as LBS
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import qualified Data.HashMap.Strict as HM
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import qualified Data.HashMap.Strict.InsOrd as OMap
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import qualified Data.Text as T
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import qualified Database.PG.Query as Q
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import qualified Text.Regex.TDFA as TDFA
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import Control.Lens ((.~))
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import Data.Aeson
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import Data.Text.Extended
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import qualified Hasura.Backends.Postgres.DDL.Table as PG
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import qualified Hasura.SQL.AnyBackend as AB
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import qualified Hasura.Tracing as Tracing
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import Hasura.Base.Error
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import Hasura.EncJSON
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import Hasura.RQL.Types
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import Hasura.RQL.Types.Eventing.Backend
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import Hasura.Session
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data CreateEventTriggerQuery (b :: BackendType)
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= CreateEventTriggerQuery
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{ _cetqSource :: !SourceName
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, _cetqName :: !TriggerName
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, _cetqTable :: !(TableName b)
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, _cetqInsert :: !(Maybe (SubscribeOpSpec b))
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, _cetqUpdate :: !(Maybe (SubscribeOpSpec b))
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, _cetqDelete :: !(Maybe (SubscribeOpSpec b))
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, _cetqEnableManual :: !(Maybe Bool)
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, _cetqRetryConf :: !(Maybe RetryConf)
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, _cetqWebhook :: !(Maybe InputWebhook)
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, _cetqWebhookFromEnv :: !(Maybe Text)
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, _cetqHeaders :: !(Maybe [HeaderConf])
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, _cetqReplace :: !Bool
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}
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instance Backend b => FromJSON (CreateEventTriggerQuery b) where
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parseJSON = withObject "create event trigger" \o -> do
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sourceName <- o .:? "source" .!= defaultSource
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name <- o .: "name"
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table <- o .: "table"
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insert <- o .:? "insert"
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update <- o .:? "update"
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delete <- o .:? "delete"
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enableManual <- o .:? "enable_manual" .!= False
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retryConf <- o .:? "retry_conf"
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webhook <- o .:? "webhook"
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webhookFromEnv <- o .:? "webhook_from_env"
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headers <- o .:? "headers"
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replace <- o .:? "replace" .!= False
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let regex = "^[A-Za-z]+[A-Za-z0-9_\\-]*$" :: LBS.ByteString
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compiledRegex = TDFA.makeRegex regex :: TDFA.Regex
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isMatch = TDFA.match compiledRegex . T.unpack $ triggerNameToTxt name
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unless isMatch $
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fail "only alphanumeric and underscore and hyphens allowed for name"
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unless (T.length (triggerNameToTxt name) <= maxTriggerNameLength) $
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fail "event trigger name can be at most 42 characters"
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unless (any isJust [insert, update, delete] || enableManual) $
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fail "atleast one amongst insert/update/delete/enable_manual spec must be provided"
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case (webhook, webhookFromEnv) of
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(Just _, Nothing) -> return ()
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(Nothing, Just _) -> return ()
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(Just _, Just _) -> fail "only one of webhook or webhook_from_env should be given"
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_ -> fail "must provide webhook or webhook_from_env"
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mapM_ checkEmptyCols [insert, update, delete]
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return $ CreateEventTriggerQuery sourceName name table insert update delete (Just enableManual) retryConf webhook webhookFromEnv headers replace
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where
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checkEmptyCols spec
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= case spec of
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Just (SubscribeOpSpec (SubCArray cols) _) -> when (null cols) (fail "found empty column specification")
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Just (SubscribeOpSpec _ (Just (SubCArray cols)) ) -> when (null cols) (fail "found empty payload specification")
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_ -> return ()
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data DeleteEventTriggerQuery (b :: BackendType)
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= DeleteEventTriggerQuery
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{ _detqSource :: !SourceName
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, _detqName :: !TriggerName
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}
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instance FromJSON (DeleteEventTriggerQuery b) where
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parseJSON = withObject "delete event trigger" $ \o ->
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DeleteEventTriggerQuery
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<$> o .:? "source" .!= defaultSource
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<*> o .: "name"
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data RedeliverEventQuery (b :: BackendType)
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= RedeliverEventQuery
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{ _rdeqEventId :: !EventId
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, _rdeqSource :: !SourceName
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}
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instance FromJSON (RedeliverEventQuery b) where
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parseJSON = withObject "redeliver event trigger" $ \o ->
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RedeliverEventQuery
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<$> o .: "event_id"
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<*> o .:? "source" .!= defaultSource
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data InvokeEventTriggerQuery (b :: BackendType)
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= InvokeEventTriggerQuery
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{ _ietqName :: !TriggerName
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, _ietqSource :: !SourceName
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, _ietqPayload :: !Value
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}
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instance Backend b => FromJSON (InvokeEventTriggerQuery b) where
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parseJSON = withObject "invoke event trigger" $ \o ->
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InvokeEventTriggerQuery
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<$> o .: "name"
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<*> o .:? "source" .!= defaultSource
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<*> o .: "payload"
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archiveEvents :: TriggerName -> Q.TxE QErr ()
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archiveEvents trn =
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Q.unitQE defaultTxErrorHandler [Q.sql|
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UPDATE hdb_catalog.event_log
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SET archived = 't'
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WHERE trigger_name = $1
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|] (Identity trn) False
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resolveEventTriggerQuery
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:: forall b m
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. (Backend b, UserInfoM m, QErrM m, CacheRM m)
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=> CreateEventTriggerQuery b
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-> m (TableCoreInfo b, Bool, EventTriggerConf b)
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resolveEventTriggerQuery (CreateEventTriggerQuery source name qt insert update delete enableManual retryConf webhook webhookFromEnv mheaders replace) = do
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ti <- askTableCoreInfo source qt
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-- can only replace for same table
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when replace $ do
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ti' <- _tiCoreInfo <$> askTabInfoFromTrigger @b source name
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when (_tciName ti' /= _tciName ti) $ throw400 NotSupported "cannot replace table or schema for trigger"
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assertCols ti insert
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assertCols ti update
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assertCols ti delete
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let rconf = fromMaybe defaultRetryConf retryConf
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return (ti, replace, EventTriggerConf name (TriggerOpsDef insert update delete enableManual) webhook webhookFromEnv rconf mheaders)
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where
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assertCols ti opSpec = onJust opSpec \sos -> case sosColumns sos of
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SubCStar -> return ()
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SubCArray pgcols -> forM_ pgcols (assertPGCol (_tciFieldInfoMap ti) "")
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createEventTriggerQueryMetadata
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:: forall pgKind m
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. (BackendMetadata ('Postgres pgKind), QErrM m, UserInfoM m, CacheRWM m, MetadataM m)
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=> CreateEventTriggerQuery ('Postgres pgKind)
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-> m (TableCoreInfo ('Postgres pgKind), EventTriggerConf ('Postgres pgKind))
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createEventTriggerQueryMetadata q = do
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(tableCoreInfo, replace, triggerConf) <- resolveEventTriggerQuery q
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let table = _cetqTable q
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source = _cetqSource q
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triggerName = etcName triggerConf
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metadataObj =
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MOSourceObjId source
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$ AB.mkAnyBackend
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$ SMOTableObj @('Postgres pgKind) table
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$ MTOTrigger triggerName
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buildSchemaCacheFor metadataObj
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$ MetadataModifier
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$ tableMetadataSetter @('Postgres pgKind) source table.tmEventTriggers %~
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if replace then ix triggerName .~ triggerConf
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else OMap.insert triggerName triggerConf
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pure (tableCoreInfo, triggerConf)
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runCreateEventTriggerQuery
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:: forall pgKind m
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. (BackendMetadata ('Postgres pgKind), QErrM m, UserInfoM m, CacheRWM m, MetadataM m)
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=> CreateEventTriggerQuery ('Postgres pgKind)
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-> m EncJSON
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runCreateEventTriggerQuery q = do
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void $ createEventTriggerQueryMetadata @pgKind q
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pure successMsg
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runDeleteEventTriggerQuery
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:: forall pgKind m
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. (BackendMetadata ('Postgres pgKind), MonadError QErr m, CacheRWM m, MonadIO m, MetadataM m)
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=> DeleteEventTriggerQuery ('Postgres pgKind)
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-> m EncJSON
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runDeleteEventTriggerQuery (DeleteEventTriggerQuery source name) = do
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-- liftTx $ delEventTriggerFromCatalog name
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sourceInfo <- askSourceInfo source
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let maybeTable = HM.lookup name $ HM.unions $
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flip map (HM.toList $ _siTables @('Postgres pgKind) sourceInfo) $ \(table, tableInfo) ->
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HM.map (const table) $ _tiEventTriggerInfoMap tableInfo
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table <- onNothing maybeTable $ throw400 NotExists $
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"event trigger with name " <> name <<> " does not exist"
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withNewInconsistentObjsCheck
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$ buildSchemaCache
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$ MetadataModifier
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$ tableMetadataSetter @('Postgres pgKind) source table %~ dropEventTriggerInMetadata name
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liftEitherM $ liftIO $ runPgSourceWriteTx (_siConfiguration sourceInfo) $ do
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PG.delTriggerQ name
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archiveEvents name
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pure successMsg
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dropEventTriggerInMetadata :: TriggerName -> TableMetadata b -> TableMetadata b
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dropEventTriggerInMetadata name =
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tmEventTriggers %~ OMap.delete name
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runRedeliverEvent
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:: forall b m
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. (BackendEventTrigger b, MonadIO m, CacheRM m, QErrM m, MetadataM m)
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=> RedeliverEventQuery b
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-> m EncJSON
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runRedeliverEvent (RedeliverEventQuery eventId source) = do
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sourceConfig <- askSourceConfig @b source
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redeliverEvent @b sourceConfig eventId
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pure successMsg
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runInvokeEventTrigger
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:: forall b m
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. ( MonadIO m
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, QErrM m
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, CacheRM m
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, MetadataM m
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, Tracing.MonadTrace m
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, UserInfoM m
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, BackendEventTrigger b
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)
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=> InvokeEventTriggerQuery b
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-> m EncJSON
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runInvokeEventTrigger (InvokeEventTriggerQuery name source payload) = do
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trigInfo <- askEventTriggerInfo @b source name
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assertManual $ etiOpsDef trigInfo
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ti <- askTabInfoFromTrigger source name
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sourceConfig <- askSourceConfig @b source
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traceCtx <- Tracing.currentContext
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userInfo <- askUserInfo
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eid <- insertManualEvent @b sourceConfig (tableInfoName @b ti) name (makePayload payload) userInfo traceCtx
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return $ encJFromJValue $ object ["event_id" .= eid]
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where
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makePayload o = object [ "old" .= Null, "new" .= o ]
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assertManual (TriggerOpsDef _ _ _ man) = case man of
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Just True -> return ()
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_ -> throw400 NotSupported "manual mode is not enabled for event trigger"
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askTabInfoFromTrigger
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:: (Backend b, QErrM m, CacheRM m)
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=> SourceName -> TriggerName -> m (TableInfo b)
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askTabInfoFromTrigger sourceName triggerName = do
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sc <- askSchemaCache
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let tabInfos = HM.elems $ fromMaybe mempty $ unsafeTableCache sourceName $ scSources sc
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find (isJust . HM.lookup triggerName . _tiEventTriggerInfoMap) tabInfos
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`onNothing` throw400 NotExists errMsg
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where
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errMsg = "event trigger " <> triggerName <<> " does not exist"
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askEventTriggerInfo
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:: forall b m. (QErrM m, CacheRM m, Backend b)
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=> SourceName -> TriggerName -> m (EventTriggerInfo b)
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askEventTriggerInfo sourceName triggerName = do
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triggerInfo <- askTabInfoFromTrigger @b sourceName triggerName
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let eventTriggerInfoMap = _tiEventTriggerInfoMap triggerInfo
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HM.lookup triggerName eventTriggerInfoMap `onNothing` throw400 NotExists errMsg
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where
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errMsg = "event trigger " <> triggerName <<> " does not exist"
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-- This change helps us create functions for the event triggers
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-- without the function name being truncated by PG, since PG allows
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-- for only 63 chars for identifiers.
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-- Reasoning for the 42 characters:
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-- 63 - (notify_hasura_) - (_INSERT | _UPDATE | _DELETE)
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maxTriggerNameLength :: Int
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maxTriggerNameLength = 42
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