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'../../utilities/globals';\nimport { useState, useRef, useEffect } from 'react';\nimport { DocumentNode } from 'graphql';\nimport { TypedDocumentNode } from '@graphql-typed-document-node/core';\nimport { invariant } from '../../utilities/globals'\nimport { equal } from '@wry/equality';\n\nimport { DocumentType, verifyDocumentType } from '../parser';\nimport {\n SubscriptionHookOptions,\n SubscriptionResult\n} from '../types/types';\nimport { OperationVariables } from '../../core';\nimport { useApolloClient } from './useApolloClient';\n\nexport function useSubscription<TData = any, TVariables extends OperationVariables = OperationVariables>(\n subscription: DocumentNode | TypedDocumentNode<TData, TVariables>,\n options?: SubscriptionHookOptions<TData, TVariables>,\n) {\n const hasIssuedDeprecationWarningRef = useRef(false);\n const client = useApolloClient(options?.client);\n verifyDocumentType(subscription, DocumentType.Subscription);\n const [result, setResult] = useState<SubscriptionResult<TData>>({\n loading: !options?.skip,\n error: void 0,\n data: void 0,\n variables: options?.variables,\n });\n\n if (!hasIssuedDeprecationWarningRef.current) {\n hasIssuedDeprecationWarningRef.current = true;\n\n if (options?.onSubscriptionData) {\n invariant.warn(\n options.onData\n ? \"'useSubscription' supports only the 'onSubscriptionData' or 'onData' option, but not both. Only the 'onData' option will be used.\"\n : \"'onSubscriptionData' is deprecated and will be removed in a future major version. Please use the 'onData' option instead.\"\n );\n }\n\n if (options?.onSubscriptionComplete) {\n invariant.warn(\n options.onComplete\n ? \"'useSubscription' supports only the 'onSubscriptionComplete' or 'onComplete' option, but not both. Only the 'onComplete' option will be used.\"\n : \"'onSubscriptionComplete' is deprecated and will be removed in a future major version. Please use the 'onComplete' option instead.\"\n );\n }\n }\n\n const [observable, setObservable] = useState(() => {\n if (options?.skip) {\n return null;\n }\n\n return client.subscribe({\n query: subscription,\n variables: options?.variables,\n fetchPolicy: options?.fetchPolicy,\n context: options?.context,\n });\n });\n\n const canResetObservableRef = useRef(false);\n useEffect(() => {\n return () => {\n canResetObservableRef.current = true;\n };\n }, []);\n\n const ref = useRef({ client, subscription, options });\n useEffect(() => {\n let shouldResubscribe = options?.shouldResubscribe;\n if (typeof shouldResubscribe === 'function') {\n shouldResubscribe = !!shouldResubscribe(options!);\n }\n\n if (options?.skip) {\n if (!options?.skip !== !ref.current.options?.skip || canResetObservableRef.current) {\n setResult({\n loading: false,\n data: void 0,\n error: void 0,\n variables: options?.variables,\n });\n setObservable(null);\n canResetObservableRef.current = false;\n }\n } else if (\n (shouldResubscribe !== false &&\n (client !== ref.current.client ||\n subscription !== ref.current.subscription ||\n options?.fetchPolicy !== ref.current.options?.fetchPolicy ||\n !options?.skip !== !ref.current.options?.skip ||\n !equal(options?.variables, ref.current.options?.variables))) ||\n canResetObservableRef.current\n ) {\n setResult({\n loading: true,\n data: void 0,\n error: void 0,\n variables: options?.variables,\n });\n setObservable(client.subscribe({\n query: subscription,\n variables: options?.variables,\n fetchPolicy: options?.fetchPolicy,\n context: options?.context,\n }));\n canResetObservableRef.current = false;\n }\n\n Object.assign(ref.current, { client, subscription, options });\n }, [client, subscription, options, canResetObservableRef.current]);\n\n useEffect(() => {\n if (!observable) {\n return;\n }\n\n const subscription = observable.subscribe({\n next(fetchResult) {\n const result = {\n loading: false,\n // TODO: fetchResult.data can be null but SubscriptionResult.data\n // expects TData | undefined only\n data: fetchResult.data!,\n error: void 0,\n variables: options?.variables,\n };\n setResult(result);\n\n if (ref.current.options?.onData) {\n ref.current.options.onData({\n client,\n data: result\n });\n } else if (ref.current.options?.onSubscriptionData) {\n ref.current.options.onSubscriptionData({\n client,\n subscriptionData: result\n });\n }\n },\n error(error) {\n setResult({\n loading: false,\n data: void 0,\n error,\n variables: options?.variables,\n });\n ref.current.options?.onError?.(error);\n },\n complete() {\n if (ref.current.options?.onComplete) {\n ref.current.options.onComplete();\n } else if (ref.current.options?.onSubscriptionComplete) {\n ref.current.options.onSubscriptionComplete();\n }\n },\n });\n\n return () => {\n subscription.unsubscribe();\n };\n }, [observable]);\n\n return result;\n}\n"]} |