@tanstack/query-core
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The framework agnostic core that powers TanStack Query
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{"version":3,"file":"utils.cjs","names":[],"sources":["../../src/utils.ts"],"sourcesContent":["import { timeoutManager } from './timeoutManager'\nimport type {\n DefaultError,\n FetchStatus,\n MutationKey,\n MutationStatus,\n QueryFunction,\n QueryKey,\n QueryOptions,\n} from './types'\nimport type { Mutation } from './mutation'\nimport type { FetchOptions, Query } from './query'\n\n// TYPES\n\ntype DropLast<T extends ReadonlyArray<unknown>> = T extends readonly [\n ...infer R,\n unknown,\n]\n ? readonly [...R]\n : never\n\ntype TuplePrefixes<T extends ReadonlyArray<unknown>> = T extends readonly []\n ? readonly []\n : TuplePrefixes<DropLast<T>> | T\n\nexport interface QueryFilters<TQueryKey extends QueryKey = QueryKey> {\n /**\n * Filter to active queries, inactive queries or all queries\n */\n type?: QueryTypeFilter\n /**\n * Match query key exactly\n */\n exact?: boolean\n /**\n * Include queries matching this predicate function\n */\n predicate?: (query: Query) => boolean\n /**\n * Include queries matching this query key\n */\n queryKey?: TQueryKey | TuplePrefixes<TQueryKey>\n /**\n * Include or exclude stale queries\n */\n stale?: boolean\n /**\n * Include queries matching their fetchStatus\n */\n fetchStatus?: FetchStatus\n}\n\nexport interface MutationFilters<\n TData = unknown,\n TError = DefaultError,\n TVariables = unknown,\n TOnMutateResult = unknown,\n> {\n /**\n * Match mutation key exactly\n */\n exact?: boolean\n /**\n * Include mutations matching this predicate function\n */\n predicate?: (\n mutation: Mutation<TData, TError, TVariables, TOnMutateResult>,\n ) => boolean\n /**\n * Include mutations matching this mutation key\n */\n mutationKey?: TuplePrefixes<MutationKey>\n /**\n * Filter by mutation status\n */\n status?: MutationStatus\n}\n\nexport type Updater<TInput, TOutput> = TOutput | ((input: TInput) => TOutput)\n\nexport type QueryTypeFilter = 'all' | 'active' | 'inactive'\n\n// UTILS\n\n/** @deprecated\n * use `environmentManager.isServer()` instead.\n */\nexport const isServer = typeof window === 'undefined' || 'Deno' in globalThis\n\nexport function noop(): void\nexport function noop(): undefined\nexport function noop() {}\n\nexport function functionalUpdate<TInput, TOutput>(\n updater: Updater<TInput, TOutput>,\n input: TInput,\n): TOutput {\n return typeof updater === 'function'\n ? (updater as (_: TInput) => TOutput)(input)\n : updater\n}\n\nexport function isValidTimeout(value: unknown): value is number {\n return typeof value === 'number' && value >= 0 && value !== Infinity\n}\n\nexport function timeUntilStale(updatedAt: number, staleTime?: number): number {\n return Math.max(updatedAt + (staleTime || 0) - Date.now(), 0)\n}\n\nexport function resolveQueryValue<\n TValue,\n TQueryFnData = unknown,\n TError = DefaultError,\n TData = TQueryFnData,\n TQueryKey extends QueryKey = QueryKey,\n>(\n value:\n | undefined\n | TValue\n | ((query: Query<TQueryFnData, TError, TData, TQueryKey>) => TValue),\n query: Query<TQueryFnData, TError, TData, TQueryKey>,\n): TValue | undefined {\n return typeof value === 'function'\n ? (\n value as (\n query: Query<TQueryFnData, TError, TData, TQueryKey>,\n ) => TValue\n )(query)\n : value\n}\n\nexport function matchQuery(\n filters: QueryFilters,\n query: Query<any, any, any, any>,\n): boolean {\n const {\n type = 'all',\n exact,\n fetchStatus,\n predicate,\n queryKey,\n stale,\n } = filters\n\n if (queryKey) {\n if (exact) {\n if (query.queryHash !== hashQueryKeyByOptions(queryKey, query.options)) {\n return false\n }\n } else if (!partialMatchKey(query.queryKey, queryKey)) {\n return false\n }\n }\n\n if (type !== 'all') {\n const isActive = query.isActive()\n if (type === 'active' && !isActive) {\n return false\n }\n if (type === 'inactive' && isActive) {\n return false\n }\n }\n\n if (typeof stale === 'boolean' && query.isStale() !== stale) {\n return false\n }\n\n if (fetchStatus && fetchStatus !== query.state.fetchStatus) {\n return false\n }\n\n if (predicate && !predicate(query)) {\n return false\n }\n\n return true\n}\n\nexport function matchMutation(\n filters: MutationFilters,\n mutation: Mutation<any, any>,\n): boolean {\n const { exact, status, predicate, mutationKey } = filters\n if (mutationKey) {\n if (!mutation.options.mutationKey) {\n return false\n }\n if (exact) {\n if (hashKey(mutation.options.mutationKey) !== hashKey(mutationKey)) {\n return false\n }\n } else if (!partialMatchKey(mutation.options.mutationKey, mutationKey)) {\n return false\n }\n }\n\n if (status && mutation.state.status !== status) {\n return false\n }\n\n if (predicate && !predicate(mutation)) {\n return false\n }\n\n return true\n}\n\nexport function hashQueryKeyByOptions<TQueryKey extends QueryKey = QueryKey>(\n queryKey: TQueryKey,\n options?: Pick<QueryOptions<any, any, any, any>, 'queryKeyHashFn'>,\n): string {\n const hashFn = options?.queryKeyHashFn || hashKey\n return hashFn(queryKey)\n}\n\n/**\n * Default query & mutation keys hash function.\n * Hashes the value into a stable hash.\n */\nexport function hashKey(queryKey: QueryKey | MutationKey): string {\n return JSON.stringify(queryKey, (_, val) =>\n isPlainObject(val)\n ? Object.keys(val)\n .sort()\n .reduce((result, key) => {\n result[key] = val[key]\n return result\n }, {} as any)\n : val,\n )\n}\n\n/**\n * Checks if key `b` partially matches with key `a`.\n */\nexport function partialMatchKey(a: QueryKey, b: QueryKey): boolean\nexport function partialMatchKey(a: any, b: any): boolean {\n if (a === b) {\n return true\n }\n\n if (typeof a !== typeof b) {\n return false\n }\n\n if (a && b && typeof a === 'object' && typeof b === 'object') {\n if (Array.isArray(a) && Array.isArray(b)) {\n for (let i = 0; i < b.length; i++) {\n if (!partialMatchKey(a[i], b[i])) {\n return false\n }\n }\n return true\n }\n\n const bKeys = Object.keys(b)\n for (const key of bKeys) {\n if (!partialMatchKey(a[key], b[key])) {\n return false\n }\n }\n return true\n }\n\n return false\n}\n\nconst hasOwn = Object.prototype.hasOwnProperty\n\n/**\n * This function returns `a` if `b` is deeply equal.\n * If not, it will replace any deeply equal children of `b` with those of `a`.\n * This can be used for structural sharing between JSON values for example.\n */\nexport function replaceEqualDeep<T>(a: unknown, b: T, depth?: number): T\nexport function replaceEqualDeep(a: any, b: any, depth = 0): any {\n if (a === b) {\n return a\n }\n\n if (depth > 500) return b\n\n const array = isPlainArray(a) && isPlainArray(b)\n\n if (!array && !(isPlainObject(a) && isPlainObject(b))) return b\n\n const aItems = array ? a : Object.keys(a)\n const aSize = aItems.length\n const bItems = array ? b : Object.keys(b)\n const bSize = bItems.length\n const copy: any = array ? new Array(bSize) : {}\n\n let equalItems = 0\n\n for (let i = 0; i < bSize; i++) {\n const key: any = array ? i : bItems[i]\n const aItem = a[key]\n const bItem = b[key]\n\n if (aItem === bItem) {\n copy[key] = aItem\n if (array ? i < aSize : hasOwn.call(a, key)) equalItems++\n continue\n }\n\n if (\n aItem === null ||\n bItem === null ||\n typeof aItem !== 'object' ||\n typeof bItem !== 'object'\n ) {\n copy[key] = bItem\n continue\n }\n\n const v = replaceEqualDeep(aItem, bItem, depth + 1)\n copy[key] = v\n if (v === aItem) equalItems++\n }\n\n return aSize === bSize && equalItems === aSize ? a : copy\n}\n\n/**\n * Shallow compare objects.\n */\nexport function shallowEqualObjects<T extends Record<string, any>>(\n a: T,\n b: T | undefined,\n): boolean {\n if (!b || Object.keys(a).length !== Object.keys(b).length) {\n return false\n }\n\n for (const key in a) {\n if (a[key] !== b[key]) {\n return false\n }\n }\n\n return true\n}\n\nexport function isPlainArray(value: unknown): value is Array<unknown> {\n return Array.isArray(value) && value.length === Object.keys(value).length\n}\n\n// Copied from: https://github.com/jonschlinkert/is-plain-object\nexport function isPlainObject(o: any): o is Record<PropertyKey, unknown> {\n if (!hasObjectPrototype(o)) {\n return false\n }\n\n // If has no constructor\n const ctor = o.constructor\n if (ctor === undefined) {\n return true\n }\n\n // If has modified prototype\n const prot = ctor.prototype\n if (!hasObjectPrototype(prot)) {\n return false\n }\n\n // If constructor does not have an Object-specific method\n if (!prot.hasOwnProperty('isPrototypeOf')) {\n return false\n }\n\n // Handles Objects created by Object.create(<arbitrary prototype>)\n if (Object.getPrototypeOf(o) !== Object.prototype) {\n return false\n }\n\n // Most likely a plain Object\n return true\n}\n\nfunction hasObjectPrototype(o: any): boolean {\n return Object.prototype.toString.call(o) === '[object Object]'\n}\n\nexport function sleep(timeout: number): Promise<void> {\n return new Promise((resolve) => {\n timeoutManager.setTimeout(resolve, timeout)\n })\n}\n\nexport function replaceData<\n TData,\n TOptions extends QueryOptions<any, any, any, any>,\n>(prevData: TData | undefined, data: TData, options: TOptions): TData {\n if (typeof options.structuralSharing === 'function') {\n return options.structuralSharing(prevData, data) as TData\n } else if (options.structuralSharing !== false) {\n if (process.env.NODE_ENV !== 'production') {\n try {\n return replaceEqualDeep(prevData, data)\n } catch (error) {\n console.error(\n `Structural sharing requires data to be JSON serializable. To fix this, turn off structuralSharing or return JSON-serializable data from your queryFn. [${options.queryHash}]: ${error}`,\n )\n\n // Prevent the replaceEqualDeep from being called again down below.\n throw error\n }\n }\n // Structurally share data between prev and new data if needed\n return replaceEqualDeep(prevData, data)\n }\n return data\n}\n\nexport function keepPreviousData<T>(\n previousData: T | undefined,\n): T | undefined {\n return previousData\n}\n\nexport function addToEnd<T>(items: Array<T>, item: T, max = 0): Array<T> {\n const newItems = [...items, item]\n return max && newItems.length > max ? newItems.slice(1) : newItems\n}\n\nexport function addToStart<T>(items: Array<T>, item: T, max = 0): Array<T> {\n const newItems = [item, ...items]\n return max && newItems.length > max ? newItems.slice(0, -1) : newItems\n}\n\nexport const skipToken = Symbol()\nexport type SkipToken = typeof skipToken\n\nexport function ensureQueryFn<\n TQueryFnData = unknown,\n TQueryKey extends QueryKey = QueryKey,\n>(\n options: {\n queryFn?: QueryFunction<TQueryFnData, TQueryKey> | SkipToken\n queryHash?: string\n },\n fetchOptions?: FetchOptions<TQueryFnData>,\n): QueryFunction<TQueryFnData, TQueryKey> {\n if (process.env.NODE_ENV !== 'production') {\n if (options.queryFn === skipToken) {\n console.error(\n `Attempted to invoke queryFn when set to skipToken. This is likely a configuration error. Query hash: '${options.queryHash}'`,\n )\n }\n }\n\n // if we attempt to retry a fetch that was triggered from an initialPromise\n // when we don't have a queryFn yet, we can't retry, so we just return the already rejected initialPromise\n // if an observer has already mounted, we will be able to retry with that queryFn\n if (!options.queryFn && fetchOptions?.initialPromise) {\n return () => fetchOptions.initialPromise!\n }\n\n if (!options.queryFn || options.queryFn === skipToken) {\n return () =>\n Promise.reject(new Error(`Missing queryFn: '${options.queryHash}'`))\n }\n\n return options.queryFn\n}\n\nexport function shouldThrowError<T extends (...args: Array<any>) => boolean>(\n throwOnError: boolean | T | undefined,\n params: Parameters<T>,\n): boolean {\n // Allow throwOnError function to override throwing behavior on a per-error basis\n if (typeof throwOnError === 'function') {\n return throwOnError(...params)\n }\n\n return !!throwOnError\n}\n\nexport function addConsumeAwareSignal<T>(\n object: T,\n getSignal: () => AbortSignal,\n onCancelled: VoidFunction,\n): T & { signal: AbortSignal } {\n let consumed = false\n let signal: AbortSignal | undefined\n\n Object.defineProperty(object, 'signal', {\n enumerable: true,\n get: () => {\n signal ??= getSignal()\n if (consumed) {\n return signal\n }\n\n consumed = true\n if (signal.aborted) {\n onCancelled()\n } else {\n signal.addEventListener('abort', onCancelled, { once: true })\n }\n\n return signal\n },\n })\n\n return object as T & { signal: AbortSignal 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