@tanstack/db/dist/cjs/local-only.cjs.map

A reactive client store for building super fast apps on sync

{"version":3,"file":"local-only.cjs","sources":["../../src/local-only.ts"],"sourcesContent":["import type {\n  CollectionConfig,\n  DeleteMutationFnParams,\n  InsertMutationFnParams,\n  OperationType,\n  ResolveType,\n  SyncConfig,\n  UpdateMutationFnParams,\n  UtilsRecord,\n} from \"./types\"\nimport type { StandardSchemaV1 } from \"@standard-schema/spec\"\n\n/**\n * Configuration interface for Local-only collection options\n * @template TExplicit - The explicit type of items in the collection (highest priority)\n * @template TSchema - The schema type for validation and type inference (second priority)\n * @template TFallback - The fallback type if no explicit or schema type is provided\n * @template TKey - The type of the key returned by getKey\n *\n * @remarks\n * Type resolution follows a priority order:\n * 1. If you provide an explicit type via generic parameter, it will be used\n * 2. If no explicit type is provided but a schema is, the schema's output type will be inferred\n * 3. If neither explicit type nor schema is provided, the fallback type will be used\n *\n * You should provide EITHER an explicit type OR a schema, but not both, as they would conflict.\n */\nexport interface LocalOnlyCollectionConfig<\n  TExplicit = unknown,\n  TSchema extends StandardSchemaV1 = never,\n  TFallback extends Record<string, unknown> = Record<string, unknown>,\n  TKey extends string | number = string | number,\n> {\n  /**\n   * Standard Collection configuration properties\n   */\n  id?: string\n  schema?: TSchema\n  getKey: (item: ResolveType<TExplicit, TSchema, TFallback>) => TKey\n\n  /**\n   * Optional initial data to populate the collection with on creation\n   * This data will be applied during the initial sync process\n   */\n  initialData?: Array<ResolveType<TExplicit, TSchema, TFallback>>\n\n  /**\n   * Optional asynchronous handler function called after an insert operation\n   * @param params Object containing transaction and collection information\n   * @returns Promise resolving to any value\n   */\n  onInsert?: (\n    params: InsertMutationFnParams<\n      ResolveType<TExplicit, TSchema, TFallback>,\n      TKey,\n      LocalOnlyCollectionUtils\n    >\n  ) => Promise<any>\n\n  /**\n   * Optional asynchronous handler function called after an update operation\n   * @param params Object containing transaction and collection information\n   * @returns Promise resolving to any value\n   */\n  onUpdate?: (\n    params: UpdateMutationFnParams<\n      ResolveType<TExplicit, TSchema, TFallback>,\n      TKey,\n      LocalOnlyCollectionUtils\n    >\n  ) => Promise<any>\n\n  /**\n   * Optional asynchronous handler function called after a delete operation\n   * @param params Object containing transaction and collection information\n   * @returns Promise resolving to any value\n   */\n  onDelete?: (\n    params: DeleteMutationFnParams<\n      ResolveType<TExplicit, TSchema, TFallback>,\n      TKey,\n      LocalOnlyCollectionUtils\n    >\n  ) => Promise<any>\n}\n\n/**\n * Local-only collection utilities type (currently empty but matches the pattern)\n */\nexport interface LocalOnlyCollectionUtils extends UtilsRecord {}\n\n/**\n * Creates Local-only collection options for use with a standard Collection\n *\n * This is an in-memory collection that doesn't sync with external sources but uses a loopback sync config\n * that immediately \"syncs\" all optimistic changes to the collection, making them permanent.\n * Perfect for local-only data that doesn't need persistence or external synchronization.\n *\n * @template TExplicit - The explicit type of items in the collection (highest priority)\n * @template TSchema - The schema type for validation and type inference (second priority)\n * @template TFallback - The fallback type if no explicit or schema type is provided\n * @template TKey - The type of the key returned by getKey\n * @param config - Configuration options for the Local-only collection\n * @returns Collection options with utilities (currently empty but follows the pattern)\n *\n * @example\n * // Basic local-only collection\n * const collection = createCollection(\n *   localOnlyCollectionOptions({\n *     getKey: (item) => item.id,\n *   })\n * )\n *\n * @example\n * // Local-only collection with initial data\n * const collection = createCollection(\n *   localOnlyCollectionOptions({\n *     getKey: (item) => item.id,\n *     initialData: [\n *       { id: 1, name: 'Item 1' },\n *       { id: 2, name: 'Item 2' },\n *     ],\n *   })\n * )\n *\n * @example\n * // Local-only collection with mutation handlers\n * const collection = createCollection(\n *   localOnlyCollectionOptions({\n *     getKey: (item) => item.id,\n *     onInsert: async ({ transaction }) => {\n *       console.log('Item inserted:', transaction.mutations[0].modified)\n *       // Custom logic after insert\n *     },\n *   })\n * )\n */\nexport function localOnlyCollectionOptions<\n  TExplicit = unknown,\n  TSchema extends StandardSchemaV1 = never,\n  TFallback extends Record<string, unknown> = Record<string, unknown>,\n  TKey extends string | number = string | number,\n>(\n  config: LocalOnlyCollectionConfig<TExplicit, TSchema, TFallback, TKey>\n): CollectionConfig<ResolveType<TExplicit, TSchema, TFallback>, TKey> & {\n  utils: LocalOnlyCollectionUtils\n} {\n  type ResolvedType = ResolveType<TExplicit, TSchema, TFallback>\n\n  const { initialData, onInsert, onUpdate, onDelete, ...restConfig } = config\n\n  // Create the sync configuration with transaction confirmation capability\n  const syncResult = createLocalOnlySync<ResolvedType, TKey>(initialData)\n\n  /**\n   * Create wrapper handlers that call user handlers first, then confirm transactions\n   * Wraps the user's onInsert handler to also confirm the transaction immediately\n   */\n  const wrappedOnInsert = async (\n    params: InsertMutationFnParams<ResolvedType, TKey, LocalOnlyCollectionUtils>\n  ) => {\n    // Call user handler first if provided\n    let handlerResult\n    if (onInsert) {\n      handlerResult = (await onInsert(params)) ?? {}\n    }\n\n    // Then synchronously confirm the transaction by looping through mutations\n    syncResult.confirmOperationsSync(params.transaction.mutations)\n\n    return handlerResult\n  }\n\n  /**\n   * Wrapper for onUpdate handler that also confirms the transaction immediately\n   */\n  const wrappedOnUpdate = async (\n    params: UpdateMutationFnParams<ResolvedType, TKey, LocalOnlyCollectionUtils>\n  ) => {\n    // Call user handler first if provided\n    let handlerResult\n    if (onUpdate) {\n      handlerResult = (await onUpdate(params)) ?? {}\n    }\n\n    // Then synchronously confirm the transaction by looping through mutations\n    syncResult.confirmOperationsSync(params.transaction.mutations)\n\n    return handlerResult\n  }\n\n  /**\n   * Wrapper for onDelete handler that also confirms the transaction immediately\n   */\n  const wrappedOnDelete = async (\n    params: DeleteMutationFnParams<ResolvedType, TKey, LocalOnlyCollectionUtils>\n  ) => {\n    // Call user handler first if provided\n    let handlerResult\n    if (onDelete) {\n      handlerResult = (await onDelete(params)) ?? {}\n    }\n\n    // Then synchronously confirm the transaction by looping through mutations\n    syncResult.confirmOperationsSync(params.transaction.mutations)\n\n    return handlerResult\n  }\n\n  return {\n    ...restConfig,\n    sync: syncResult.sync,\n    onInsert: wrappedOnInsert,\n    onUpdate: wrappedOnUpdate,\n    onDelete: wrappedOnDelete,\n    utils: {} as LocalOnlyCollectionUtils,\n    startSync: true,\n    gcTime: 0,\n  }\n}\n\n/**\n * Internal function to create Local-only sync configuration with transaction confirmation\n *\n * This captures the sync functions and provides synchronous confirmation of operations.\n * It creates a loopback sync that immediately confirms all optimistic operations,\n * making them permanent in the collection.\n *\n * @param initialData - Optional array of initial items to populate the collection\n * @returns Object with sync configuration and confirmOperationsSync function\n */\nfunction createLocalOnlySync<T extends object, TKey extends string | number>(\n  initialData?: Array<T>\n) {\n  // Capture sync functions for transaction confirmation\n  let syncBegin: (() => void) | null = null\n  let syncWrite: ((message: { type: OperationType; value: T }) => void) | null =\n    null\n  let syncCommit: (() => void) | null = null\n\n  const sync: SyncConfig<T, TKey> = {\n    /**\n     * Sync function that captures sync parameters and applies initial data\n     * @param params - Sync parameters containing begin, write, and commit functions\n     * @returns Unsubscribe function (empty since no ongoing sync is needed)\n     */\n    sync: (params) => {\n      const { begin, write, commit, markReady } = params\n\n      // Capture sync functions for later use by confirmOperationsSync\n      syncBegin = begin\n      syncWrite = write\n      syncCommit = commit\n\n      // Apply initial data if provided\n      if (initialData && initialData.length > 0) {\n        begin()\n        initialData.forEach((item) => {\n          write({\n            type: `insert`,\n            value: item,\n          })\n        })\n        commit()\n      }\n\n      // Mark collection as ready since local-only collections are immediately ready\n      markReady()\n\n      // Return empty unsubscribe function - no ongoing sync needed\n      return () => {}\n    },\n    /**\n     * Get sync metadata - returns empty object for local-only collections\n     * @returns Empty metadata object\n     */\n    getSyncMetadata: () => ({}),\n  }\n\n  /**\n   * Synchronously confirms optimistic operations by immediately writing through sync\n   *\n   * This loops through transaction mutations and applies them to move from optimistic to synced state.\n   * It's called after user handlers to make optimistic changes permanent.\n   *\n   * @param mutations - Array of mutation objects from the transaction\n   */\n  const confirmOperationsSync = (mutations: Array<any>) => {\n    if (!syncBegin || !syncWrite || !syncCommit) {\n      return // Sync not initialized yet, which is fine\n    }\n\n    // Immediately write back through sync interface\n    syncBegin()\n    mutations.forEach((mutation) => {\n      if (syncWrite) {\n        syncWrite({\n          type: mutation.type,\n          value: mutation.modified,\n        })\n      }\n    })\n    syncCommit()\n  }\n\n  return {\n    sync,\n    confirmOperationsSync,\n  }\n}\n"],"names":[],"mappings":";;AAyIO,SAAS,2BAMd,QAGA;AAGA,QAAM,EAAE,aAAa,UAAU,UAAU,UAAU,GAAG,eAAe;AAGrE,QAAM,aAAa,oBAAwC,WAAW;AAMtE,QAAM,kBAAkB,OACtB,WACG;AAEH,QAAI;AACJ,QAAI,UAAU;AACZ,sBAAiB,MAAM,SAAS,MAAM,KAAM,CAAA;AAAA,IAC9C;AAGA,eAAW,sBAAsB,OAAO,YAAY,SAAS;AAE7D,WAAO;AAAA,EACT;AAKA,QAAM,kBAAkB,OACtB,WACG;AAEH,QAAI;AACJ,QAAI,UAAU;AACZ,sBAAiB,MAAM,SAAS,MAAM,KAAM,CAAA;AAAA,IAC9C;AAGA,eAAW,sBAAsB,OAAO,YAAY,SAAS;AAE7D,WAAO;AAAA,EACT;AAKA,QAAM,kBAAkB,OACtB,WACG;AAEH,QAAI;AACJ,QAAI,UAAU;AACZ,sBAAiB,MAAM,SAAS,MAAM,KAAM,CAAA;AAAA,IAC9C;AAGA,eAAW,sBAAsB,OAAO,YAAY,SAAS;AAE7D,WAAO;AAAA,EACT;AAEA,SAAO;AAAA,IACL,GAAG;AAAA,IACH,MAAM,WAAW;AAAA,IACjB,UAAU;AAAA,IACV,UAAU;AAAA,IACV,UAAU;AAAA,IACV,OAAO,CAAA;AAAA,IACP,WAAW;AAAA,IACX,QAAQ;AAAA,EAAA;AAEZ;AAYA,SAAS,oBACP,aACA;AAEA,MAAI,YAAiC;AACrC,MAAI,YACF;AACF,MAAI,aAAkC;AAEtC,QAAM,OAA4B;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,IAMhC,MAAM,CAAC,WAAW;AAChB,YAAM,EAAE,OAAO,OAAO,QAAQ,cAAc;AAG5C,kBAAY;AACZ,kBAAY;AACZ,mBAAa;AAGb,UAAI,eAAe,YAAY,SAAS,GAAG;AACzC,cAAA;AACA,oBAAY,QAAQ,CAAC,SAAS;AAC5B,gBAAM;AAAA,YACJ,MAAM;AAAA,YACN,OAAO;AAAA,UAAA,CACR;AAAA,QACH,CAAC;AACD,eAAA;AAAA,MACF;AAGA,gBAAA;AAGA,aAAO,MAAM;AAAA,MAAC;AAAA,IAChB;AAAA;AAAA;AAAA;AAAA;AAAA,IAKA,iBAAiB,OAAO,CAAA;AAAA,EAAC;AAW3B,QAAM,wBAAwB,CAAC,cAA0B;AACvD,QAAI,CAAC,aAAa,CAAC,aAAa,CAAC,YAAY;AAC3C;AAAA,IACF;AAGA,cAAA;AACA,cAAU,QAAQ,CAAC,aAAa;AAC9B,UAAI,WAAW;AACb,kBAAU;AAAA,UACR,MAAM,SAAS;AAAA,UACf,OAAO,SAAS;AAAA,QAAA,CACjB;AAAA,MACH;AAAA,IACF,CAAC;AACD,eAAA;AAAA,EACF;AAEA,SAAO;AAAA,IACL;AAAA,IACA;AAAA,EAAA;AAEJ;;"}