{"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 {\n private client: QueryClient\n private result: QueryObserverResult[]\n private queries: QueryObserverOptions[]\n private observers: QueryObserver[]\n private observersMap: Record\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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