@tanstack/react-db/dist/cjs/useLiveQuery.cjs.map

React integration for @tanstack/db

{"version":3,"file":"useLiveQuery.cjs","sources":["../../src/useLiveQuery.ts"],"sourcesContent":["import { useRef, useSyncExternalStore } from \"react\"\nimport { createLiveQueryCollection } from \"@tanstack/db\"\nimport type {\n  Collection,\n  CollectionStatus,\n  Context,\n  GetResult,\n  InitialQueryBuilder,\n  LiveQueryCollectionConfig,\n  QueryBuilder,\n} from \"@tanstack/db\"\n\n/**\n * Create a live query using a query function\n * @param queryFn - Query function that defines what data to fetch\n * @param deps - Array of dependencies that trigger query re-execution when changed\n * @returns Object with reactive data, state, and status information\n * @example\n * // Basic query with object syntax\n * const { data, isLoading } = useLiveQuery((q) =>\n *   q.from({ todos: todosCollection })\n *    .where(({ todos }) => eq(todos.completed, false))\n *    .select(({ todos }) => ({ id: todos.id, text: todos.text }))\n * )\n *\n * @example\n * // With dependencies that trigger re-execution\n * const { data, state } = useLiveQuery(\n *   (q) => q.from({ todos: todosCollection })\n *          .where(({ todos }) => gt(todos.priority, minPriority)),\n *   [minPriority] // Re-run when minPriority changes\n * )\n *\n * @example\n * // Join pattern\n * const { data } = useLiveQuery((q) =>\n *   q.from({ issues: issueCollection })\n *    .join({ persons: personCollection }, ({ issues, persons }) =>\n *      eq(issues.userId, persons.id)\n *    )\n *    .select(({ issues, persons }) => ({\n *      id: issues.id,\n *      title: issues.title,\n *      userName: persons.name\n *    }))\n * )\n *\n * @example\n * // Handle loading and error states\n * const { data, isLoading, isError, status } = useLiveQuery((q) =>\n *   q.from({ todos: todoCollection })\n * )\n *\n * if (isLoading) return <div>Loading...</div>\n * if (isError) return <div>Error: {status}</div>\n *\n * return (\n *   <ul>\n *     {data.map(todo => <li key={todo.id}>{todo.text}</li>)}\n *   </ul>\n * )\n */\n// Overload 1: Accept just the query function\nexport function useLiveQuery<TContext extends Context>(\n  queryFn: (q: InitialQueryBuilder) => QueryBuilder<TContext>,\n  deps?: Array<unknown>\n): {\n  state: Map<string | number, GetResult<TContext>>\n  data: Array<GetResult<TContext>>\n  collection: Collection<GetResult<TContext>, string | number, {}>\n  status: CollectionStatus\n  isLoading: boolean\n  isReady: boolean\n  isIdle: boolean\n  isError: boolean\n  isCleanedUp: boolean\n}\n\n/**\n * Create a live query using configuration object\n * @param config - Configuration object with query and options\n * @param deps - Array of dependencies that trigger query re-execution when changed\n * @returns Object with reactive data, state, and status information\n * @example\n * // Basic config object usage\n * const { data, status } = useLiveQuery({\n *   query: (q) => q.from({ todos: todosCollection }),\n *   gcTime: 60000\n * })\n *\n * @example\n * // With query builder and options\n * const queryBuilder = new Query()\n *   .from({ persons: collection })\n *   .where(({ persons }) => gt(persons.age, 30))\n *   .select(({ persons }) => ({ id: persons.id, name: persons.name }))\n *\n * const { data, isReady } = useLiveQuery({ query: queryBuilder })\n *\n * @example\n * // Handle all states uniformly\n * const { data, isLoading, isReady, isError } = useLiveQuery({\n *   query: (q) => q.from({ items: itemCollection })\n * })\n *\n * if (isLoading) return <div>Loading...</div>\n * if (isError) return <div>Something went wrong</div>\n * if (!isReady) return <div>Preparing...</div>\n *\n * return <div>{data.length} items loaded</div>\n */\n// Overload 2: Accept config object\nexport function useLiveQuery<TContext extends Context>(\n  config: LiveQueryCollectionConfig<TContext>,\n  deps?: Array<unknown>\n): {\n  state: Map<string | number, GetResult<TContext>>\n  data: Array<GetResult<TContext>>\n  collection: Collection<GetResult<TContext>, string | number, {}>\n  status: CollectionStatus\n  isLoading: boolean\n  isReady: boolean\n  isIdle: boolean\n  isError: boolean\n  isCleanedUp: boolean\n}\n\n/**\n * Subscribe to an existing live query collection\n * @param liveQueryCollection - Pre-created live query collection to subscribe to\n * @returns Object with reactive data, state, and status information\n * @example\n * // Using pre-created live query collection\n * const myLiveQuery = createLiveQueryCollection((q) =>\n *   q.from({ todos: todosCollection }).where(({ todos }) => eq(todos.active, true))\n * )\n * const { data, collection } = useLiveQuery(myLiveQuery)\n *\n * @example\n * // Access collection methods directly\n * const { data, collection, isReady } = useLiveQuery(existingCollection)\n *\n * // Use collection for mutations\n * const handleToggle = (id) => {\n *   collection.update(id, draft => { draft.completed = !draft.completed })\n * }\n *\n * @example\n * // Handle states consistently\n * const { data, isLoading, isError } = useLiveQuery(sharedCollection)\n *\n * if (isLoading) return <div>Loading...</div>\n * if (isError) return <div>Error loading data</div>\n *\n * return <div>{data.map(item => <Item key={item.id} {...item} />)}</div>\n */\n// Overload 3: Accept pre-created live query collection\nexport function useLiveQuery<\n  TResult extends object,\n  TKey extends string | number,\n  TUtils extends Record<string, any>,\n>(\n  liveQueryCollection: Collection<TResult, TKey, TUtils>\n): {\n  state: Map<TKey, TResult>\n  data: Array<TResult>\n  collection: Collection<TResult, TKey, TUtils>\n  status: CollectionStatus\n  isLoading: boolean\n  isReady: boolean\n  isIdle: boolean\n  isError: boolean\n  isCleanedUp: boolean\n}\n\n// Implementation - use function overloads to infer the actual collection type\nexport function useLiveQuery(\n  configOrQueryOrCollection: any,\n  deps: Array<unknown> = []\n) {\n  // Check if it's already a collection by checking for specific collection methods\n  const isCollection =\n    configOrQueryOrCollection &&\n    typeof configOrQueryOrCollection === `object` &&\n    typeof configOrQueryOrCollection.subscribeChanges === `function` &&\n    typeof configOrQueryOrCollection.startSyncImmediate === `function` &&\n    typeof configOrQueryOrCollection.id === `string`\n\n  // Use refs to cache collection and track dependencies\n  const collectionRef = useRef<any>(null)\n  const depsRef = useRef<Array<unknown> | null>(null)\n  const configRef = useRef<any>(null)\n\n  // Check if we need to create/recreate the collection\n  const needsNewCollection =\n    !collectionRef.current ||\n    (isCollection && configRef.current !== configOrQueryOrCollection) ||\n    (!isCollection &&\n      (depsRef.current === null ||\n        depsRef.current.length !== deps.length ||\n        depsRef.current.some((dep, i) => dep !== deps[i])))\n\n  if (needsNewCollection) {\n    if (isCollection) {\n      // It's already a collection, ensure sync is started for React hooks\n      configOrQueryOrCollection.startSyncImmediate()\n      collectionRef.current = configOrQueryOrCollection\n      configRef.current = configOrQueryOrCollection\n    } else {\n      // Original logic for creating collections\n      // Ensure we always start sync for React hooks\n      if (typeof configOrQueryOrCollection === `function`) {\n        collectionRef.current = createLiveQueryCollection({\n          query: configOrQueryOrCollection,\n          startSync: true,\n          gcTime: 0, // Live queries created by useLiveQuery are cleaned up immediately\n        })\n      } else {\n        collectionRef.current = createLiveQueryCollection({\n          startSync: true,\n          gcTime: 0, // Live queries created by useLiveQuery are cleaned up immediately\n          ...configOrQueryOrCollection,\n        })\n      }\n      depsRef.current = [...deps]\n    }\n  }\n\n  // Use refs to track version and memoized snapshot\n  const versionRef = useRef(0)\n  const snapshotRef = useRef<{\n    state: Map<any, any>\n    data: Array<any>\n    collection: Collection<any, any, any>\n    _version: number\n  } | null>(null)\n\n  // Reset refs when collection changes\n  if (needsNewCollection) {\n    versionRef.current = 0\n    snapshotRef.current = null\n  }\n\n  // Create stable subscribe function using ref\n  const subscribeRef = useRef<\n    ((onStoreChange: () => void) => () => void) | null\n  >(null)\n  if (!subscribeRef.current || needsNewCollection) {\n    subscribeRef.current = (onStoreChange: () => void) => {\n      const unsubscribe = collectionRef.current!.subscribeChanges(() => {\n        versionRef.current += 1\n        onStoreChange()\n      })\n      return () => {\n        unsubscribe()\n      }\n    }\n  }\n\n  // Create stable getSnapshot function using ref\n  const getSnapshotRef = useRef<\n    | (() => {\n        state: Map<any, any>\n        data: Array<any>\n        collection: Collection<any, any, any>\n      })\n    | null\n  >(null)\n  if (!getSnapshotRef.current || needsNewCollection) {\n    getSnapshotRef.current = () => {\n      const currentVersion = versionRef.current\n      const currentCollection = collectionRef.current!\n\n      // If we don't have a snapshot or the version changed, create a new one\n      if (\n        !snapshotRef.current ||\n        snapshotRef.current._version !== currentVersion\n      ) {\n        snapshotRef.current = {\n          get state() {\n            return new Map(currentCollection.entries())\n          },\n          get data() {\n            return Array.from(currentCollection.values())\n          },\n          collection: currentCollection,\n          _version: currentVersion,\n        }\n      }\n\n      return snapshotRef.current\n    }\n  }\n\n  // Use useSyncExternalStore to subscribe to collection changes\n  const snapshot = useSyncExternalStore(\n    subscribeRef.current,\n    getSnapshotRef.current\n  )\n\n  return {\n    state: snapshot.state,\n    data: snapshot.data,\n    collection: snapshot.collection,\n    status: snapshot.collection.status,\n    isLoading:\n      snapshot.collection.status === `loading` ||\n      snapshot.collection.status === `initialCommit`,\n    isReady: snapshot.collection.status === `ready`,\n    isIdle: snapshot.collection.status === `idle`,\n    isError: snapshot.collection.status === `error`,\n    isCleanedUp: snapshot.collection.status === `cleaned-up`,\n  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