@tanstack/query-core/build/modern/mutationObserver.cjs.map

The framework agnostic core that powers TanStack Query

{"version":3,"sources":["../../src/mutationObserver.ts"],"sourcesContent":["import { getDefaultState } from './mutation'\nimport { notifyManager } from './notifyManager'\nimport { Subscribable } from './subscribable'\nimport { shallowEqualObjects } from './utils'\nimport type { QueryClient } from './queryClient'\nimport type {\n  DefaultError,\n  MutateOptions,\n  MutationObserverOptions,\n  MutationObserverResult,\n} from './types'\nimport type { Action, Mutation } from './mutation'\n\n// TYPES\n\ntype MutationObserverListener<TData, TError, TVariables, TContext> = (\n  result: MutationObserverResult<TData, TError, TVariables, TContext>,\n) => void\n\n// CLASS\n\nexport class MutationObserver<\n  TData = unknown,\n  TError = DefaultError,\n  TVariables = void,\n  TContext = unknown,\n> extends Subscribable<\n  MutationObserverListener<TData, TError, TVariables, TContext>\n> {\n  options!: MutationObserverOptions<TData, TError, TVariables, TContext>\n\n  #client: QueryClient\n  #currentResult: MutationObserverResult<TData, TError, TVariables, TContext> =\n    undefined!\n  #currentMutation?: Mutation<TData, TError, TVariables, TContext>\n  #mutateOptions?: MutateOptions<TData, TError, TVariables, TContext>\n\n  constructor(\n    client: QueryClient,\n    options: MutationObserverOptions<TData, TError, TVariables, TContext>,\n  ) {\n    super()\n\n    this.#client = client\n    this.setOptions(options)\n    this.bindMethods()\n    this.#updateResult()\n  }\n\n  protected bindMethods(): void {\n    this.mutate = this.mutate.bind(this)\n    this.reset = this.reset.bind(this)\n  }\n\n  setOptions(\n    options?: MutationObserverOptions<TData, TError, TVariables, TContext>,\n  ) {\n    const prevOptions = this.options\n    this.options = this.#client.defaultMutationOptions(options)\n    if (!shallowEqualObjects(prevOptions, this.options)) {\n      this.#client.getMutationCache().notify({\n        type: 'observerOptionsUpdated',\n        mutation: this.#currentMutation,\n        observer: this,\n      })\n    }\n    this.#currentMutation?.setOptions(this.options)\n  }\n\n  protected onUnsubscribe(): void {\n    if (!this.hasListeners()) {\n      this.#currentMutation?.removeObserver(this)\n    }\n  }\n\n  onMutationUpdate(action: Action<TData, TError, TVariables, TContext>): void {\n    this.#updateResult()\n\n    this.#notify(action)\n  }\n\n  getCurrentResult(): MutationObserverResult<\n    TData,\n    TError,\n    TVariables,\n    TContext\n  > {\n    return this.#currentResult\n  }\n\n  reset(): void {\n    this.#currentMutation = undefined\n    this.#updateResult()\n    this.#notify()\n  }\n\n  mutate(\n    variables: TVariables,\n    options?: MutateOptions<TData, TError, TVariables, TContext>,\n  ): Promise<TData> {\n    this.#mutateOptions = options\n\n    this.#currentMutation?.removeObserver(this)\n\n    this.#currentMutation = this.#client\n      .getMutationCache()\n      .build(this.#client, this.options)\n\n    this.#currentMutation.addObserver(this)\n\n    return this.#currentMutation.execute(variables)\n  }\n\n  #updateResult(): void {\n    const state =\n      this.#currentMutation?.state ??\n      getDefaultState<TData, TError, TVariables, TContext>()\n\n    this.#currentResult = {\n      ...state,\n      isPending: state.status === 'pending',\n      isSuccess: state.status === 'success',\n      isError: state.status === 'error',\n      isIdle: state.status === 'idle',\n      mutate: this.mutate,\n      reset: this.reset,\n    } as MutationObserverResult<TData, TError, TVariables, TContext>\n  }\n\n  #notify(action?: Action<TData, TError, TVariables, TContext>): void {\n    notifyManager.batch(() => {\n      // First trigger the mutate callbacks\n      if (this.#mutateOptions && this.hasListeners()) {\n        if (action?.type === 'success') {\n          this.#mutateOptions.onSuccess?.(\n            action.data,\n            this.#currentResult.variables!,\n            this.#currentResult.context!,\n          )\n          this.#mutateOptions.onSettled?.(\n            action.data,\n            null,\n            this.#currentResult.variables!,\n            this.#currentResult.context,\n          )\n        } else if (action?.type === 'error') {\n          this.#mutateOptions.onError?.(\n            action.error,\n            this.#currentResult.variables!,\n            this.#currentResult.context,\n          )\n          this.#mutateOptions.onSettled?.(\n            undefined,\n            action.error,\n            this.#currentResult.variables!,\n            this.#currentResult.context,\n          )\n        }\n      }\n\n      // Then trigger the listeners\n      this.listeners.forEach((listener) => {\n        listener(this.#currentResult)\n      })\n    })\n  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