@apollo/client/link/error/index.js.map

A fully-featured caching GraphQL client.

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{ ExecutionResult } from 'graphql';\n\nimport { NetworkError, GraphQLErrors } from '../../errors';\nimport { Observable } from '../../utilities';\nimport { ApolloLink, Operation, FetchResult, NextLink } from '../core';\n\nexport interface ErrorResponse {\n  graphQLErrors?: GraphQLErrors;\n  networkError?: NetworkError;\n  response?: ExecutionResult;\n  operation: Operation;\n  forward: NextLink;\n}\n\nexport namespace ErrorLink {\n  /**\n   * Callback to be triggered when an error occurs within the link stack.\n   */\n  export interface ErrorHandler {\n    (error: ErrorResponse): Observable<FetchResult> | void;\n  }\n}\n\n// For backwards compatibility.\nexport import ErrorHandler = ErrorLink.ErrorHandler;\n\nexport function onError(errorHandler: ErrorHandler): ApolloLink {\n  return new ApolloLink((operation, forward) => {\n    return new Observable(observer => {\n      let sub: any;\n      let retriedSub: any;\n      let retriedResult: any;\n\n      try {\n        sub = forward(operation).subscribe({\n          next: result => {\n            if (result.errors) {\n              retriedResult = errorHandler({\n                graphQLErrors: result.errors,\n                response: result,\n                operation,\n                forward,\n              });\n\n              if (retriedResult) {\n                retriedSub = retriedResult.subscribe({\n                  next: observer.next.bind(observer),\n                  error: observer.error.bind(observer),\n                  complete: observer.complete.bind(observer),\n                });\n                return;\n              }\n            }\n            observer.next(result);\n          },\n          error: networkError => {\n            retriedResult = errorHandler({\n              operation,\n              networkError,\n              //Network errors can return GraphQL errors on for example a 403\n              graphQLErrors:\n                networkError &&\n                networkError.result &&\n                networkError.result.errors,\n              forward,\n            });\n            if (retriedResult) {\n              retriedSub = retriedResult.subscribe({\n                next: observer.next.bind(observer),\n                error: observer.error.bind(observer),\n                complete: observer.complete.bind(observer),\n              });\n              return;\n            }\n            observer.error(networkError);\n          },\n          complete: () => {\n            // disable the previous sub from calling complete on observable\n            // if retry is in flight.\n            if (!retriedResult) {\n              observer.complete.bind(observer)();\n            }\n          },\n        });\n      } catch (e) {\n        errorHandler({ networkError: e, operation, forward });\n        observer.error(e);\n      }\n\n      return () => {\n        if (sub) sub.unsubscribe();\n        if (retriedSub) sub.unsubscribe();\n      };\n    });\n  });\n}\n\nexport class ErrorLink extends ApolloLink {\n  private link: ApolloLink;\n  constructor(errorHandler: ErrorLink.ErrorHandler) {\n    super();\n    this.link = onError(errorHandler);\n  }\n\n  public request(\n    operation: Operation,\n    forward: NextLink,\n  ): Observable<FetchResult> | null {\n    return this.link.request(operation, forward);\n  }\n}\n"]}