{"version":3,"file":"queriesObserver.esm.js","sources":["../../src/queriesObserver.ts"],"sourcesContent":["import { difference, replaceAt } from './utils'\nimport { notifyManager } from './notifyManager'\nimport { QueryObserver } from './queryObserver'\nimport { Subscribable } from './subscribable'\nimport type {\n  DefaultedQueryObserverOptions,\n  QueryObserverOptions,\n  QueryObserverResult,\n} from './types'\nimport type { QueryClient } from './queryClient'\nimport type { NotifyOptions } from './queryObserver'\n\ntype QueriesObserverListener = (result: QueryObserverResult[]) => void\n\nexport class QueriesObserver extends Subscribable<QueriesObserverListener> {\n  private client: QueryClient\n  private result: QueryObserverResult[]\n  private queries: QueryObserverOptions[]\n  private observers: QueryObserver[]\n  private observersMap: Record<string, QueryObserver>\n\n  constructor(client: QueryClient, queries?: QueryObserverOptions[]) {\n    super()\n\n    this.client = client\n    this.queries = []\n    this.result = []\n    this.observers = []\n    this.observersMap = {}\n\n    if (queries) {\n      this.setQueries(queries)\n    }\n  }\n\n  protected onSubscribe(): void {\n    if (this.listeners.size === 1) {\n      this.observers.forEach((observer) => {\n        observer.subscribe((result) => {\n          this.onUpdate(observer, result)\n        })\n      })\n    }\n  }\n\n  protected onUnsubscribe(): void {\n    if (!this.listeners.size) {\n      this.destroy()\n    }\n  }\n\n  destroy(): void {\n    this.listeners = new Set()\n    this.observers.forEach((observer) => {\n      observer.destroy()\n    })\n  }\n\n  setQueries(\n    queries: QueryObserverOptions[],\n    notifyOptions?: NotifyOptions,\n  ): void {\n    this.queries = queries\n\n    notifyManager.batch(() => {\n      const prevObservers = this.observers\n\n      const newObserverMatches = this.findMatchingObservers(this.queries)\n\n      // set options for the new observers to notify of changes\n      newObserverMatches.forEach((match) =>\n        match.observer.setOptions(match.defaultedQueryOptions, notifyOptions),\n      )\n\n      const newObservers = newObserverMatches.map((match) => match.observer)\n      const newObserversMap = Object.fromEntries(\n        newObservers.map((observer) => [observer.options.queryHash, observer]),\n      )\n      const newResult = newObservers.map((observer) =>\n        observer.getCurrentResult(),\n      )\n\n      const hasIndexChange = newObservers.some(\n        (observer, index) => observer !== prevObservers[index],\n      )\n      if (prevObservers.length === newObservers.length && !hasIndexChange) {\n        return\n      }\n\n      this.observers = newObservers\n      this.observersMap = newObserversMap\n      this.result = newResult\n\n      if (!this.hasListeners()) {\n        return\n      }\n\n      difference(prevObservers, newObservers).forEach((observer) => {\n        observer.destroy()\n      })\n\n      difference(newObservers, prevObservers).forEach((observer) => {\n        observer.subscribe((result) => {\n          this.onUpdate(observer, result)\n        })\n      })\n\n      this.notify()\n    })\n  }\n\n  getCurrentResult(): QueryObserverResult[] {\n    return this.result\n  }\n\n  getQueries() {\n    return this.observers.map((observer) => observer.getCurrentQuery())\n  }\n\n  getObservers() {\n    return this.observers\n  }\n\n  getOptimisticResult(queries: QueryObserverOptions[]): QueryObserverResult[] {\n    return this.findMatchingObservers(queries).map((match) =>\n      match.observer.getOptimisticResult(match.defaultedQueryOptions),\n    )\n  }\n\n  private findMatchingObservers(\n    queries: QueryObserverOptions[],\n  ): QueryObserverMatch[] {\n    const prevObservers = this.observers\n    const prevObserversMap = new Map(\n      prevObservers.map((observer) => [observer.options.queryHash, observer]),\n    )\n\n    const defaultedQueryOptions = queries.map((options) =>\n      this.client.defaultQueryOptions(options),\n    )\n\n    const matchingObservers: QueryObserverMatch[] =\n      defaultedQueryOptions.flatMap((defaultedOptions) => {\n        const match = prevObserversMap.get(defaultedOptions.queryHash)\n        if (match != null) {\n          return [{ defaultedQueryOptions: defaultedOptions, observer: match }]\n        }\n        return []\n      })\n\n    const matchedQueryHashes = new Set(\n      matchingObservers.map((match) => match.defaultedQueryOptions.queryHash),\n    )\n    const unmatchedQueries = defaultedQueryOptions.filter(\n      (defaultedOptions) => !matchedQueryHashes.has(defaultedOptions.queryHash),\n    )\n\n    const matchingObserversSet = new Set(\n      matchingObservers.map((match) => match.observer),\n    )\n    const unmatchedObservers = prevObservers.filter(\n      (prevObserver) => !matchingObserversSet.has(prevObserver),\n    )\n\n    const getObserver = (options: QueryObserverOptions): QueryObserver => {\n      const defaultedOptions = this.client.defaultQueryOptions(options)\n      const currentObserver = this.observersMap[defaultedOptions.queryHash!]\n      return currentObserver ?? new QueryObserver(this.client, defaultedOptions)\n    }\n\n    const newOrReusedObservers: QueryObserverMatch[] = unmatchedQueries.map(\n      (options, index) => {\n        if (options.keepPreviousData) {\n          // return previous data from one of the observers that no longer match\n          const previouslyUsedObserver = unmatchedObservers[index]\n          if (previouslyUsedObserver !== undefined) {\n            return {\n              defaultedQueryOptions: options,\n              observer: previouslyUsedObserver,\n            }\n          }\n        }\n        return {\n          defaultedQueryOptions: options,\n          observer: getObserver(options),\n        }\n      },\n    )\n\n    const sortMatchesByOrderOfQueries = (\n      a: QueryObserverMatch,\n      b: QueryObserverMatch,\n    ): number =>\n      defaultedQueryOptions.indexOf(a.defaultedQueryOptions) -\n      defaultedQueryOptions.indexOf(b.defaultedQueryOptions)\n\n    return matchingObservers\n      .concat(newOrReusedObservers)\n      .sort(sortMatchesByOrderOfQueries)\n  }\n\n  private onUpdate(observer: QueryObserver, result: QueryObserverResult): void {\n    const index = this.observers.indexOf(observer)\n    if (index !== -1) {\n      this.result = replaceAt(this.result, index, result)\n      this.notify()\n    }\n  }\n\n  private notify(): void {\n    notifyManager.batch(() => {\n      this.listeners.forEach(({ listener }) => {\n        listener(this.result)\n      })\n    })\n  }\n}\n\ntype QueryObserverMatch = {\n  defaultedQueryOptions: DefaultedQueryObserverOptions\n  observer: 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