@tanstack/db/dist/cjs/SortedMap.cjs.map

A reactive client store for building super fast apps on sync

{"version":3,"file":"SortedMap.cjs","sources":["../../src/SortedMap.ts"],"sourcesContent":["/**\n * A Map implementation that keeps its entries sorted based on a comparator function\n * @template TKey - The type of keys in the map\n * @template TValue - The type of values in the map\n */\nexport class SortedMap<TKey, TValue> {\n  private map: Map<TKey, TValue>\n  private sortedKeys: Array<TKey>\n  private comparator: (a: TValue, b: TValue) => number\n\n  /**\n   * Creates a new SortedMap instance\n   *\n   * @param comparator - Optional function to compare values for sorting\n   */\n  constructor(comparator?: (a: TValue, b: TValue) => number) {\n    this.map = new Map<TKey, TValue>()\n    this.sortedKeys = []\n    this.comparator = comparator || this.defaultComparator\n  }\n\n  /**\n   * Default comparator function used when none is provided\n   *\n   * @param a - First value to compare\n   * @param b - Second value to compare\n   * @returns -1 if a < b, 1 if a > b, 0 if equal\n   */\n  private defaultComparator(a: TValue, b: TValue): number {\n    if (a < b) return -1\n    if (a > b) return 1\n    return 0\n  }\n\n  /**\n   * Finds the index where a key-value pair should be inserted to maintain sort order.\n   * Uses binary search to find the correct position based on the value.\n   * Hence, it is in O(log n) time.\n   *\n   * @param key - The key to find position for\n   * @param value - The value to compare against\n   * @returns The index where the key should be inserted\n   */\n  private indexOf(value: TValue): number {\n    let left = 0\n    let right = this.sortedKeys.length\n\n    while (left < right) {\n      const mid = Math.floor((left + right) / 2)\n      const midKey = this.sortedKeys[mid]!\n      const midValue = this.map.get(midKey)!\n      const comparison = this.comparator(value, midValue)\n\n      if (comparison < 0) {\n        right = mid\n      } else if (comparison > 0) {\n        left = mid + 1\n      } else {\n        return mid\n      }\n    }\n\n    return left\n  }\n\n  /**\n   * Sets a key-value pair in the map and maintains sort order\n   *\n   * @param key - The key to set\n   * @param value - The value to associate with the key\n   * @returns This SortedMap instance for chaining\n   */\n  set(key: TKey, value: TValue): this {\n    if (this.map.has(key)) {\n      // Need to remove the old key from the sorted keys array\n      const oldValue = this.map.get(key)!\n      const oldIndex = this.indexOf(oldValue)\n      this.sortedKeys.splice(oldIndex, 1)\n    }\n\n    // Insert the new key at the correct position\n    const index = this.indexOf(value)\n    this.sortedKeys.splice(index, 0, key)\n\n    this.map.set(key, value)\n\n    return this\n  }\n\n  /**\n   * Gets a value by its key\n   *\n   * @param key - The key to look up\n   * @returns The value associated with the key, or undefined if not found\n   */\n  get(key: TKey): TValue | undefined {\n    return this.map.get(key)\n  }\n\n  /**\n   * Removes a key-value pair from the map\n   *\n   * @param key - The key to remove\n   * @returns True if the key was found and removed, false otherwise\n   */\n  delete(key: TKey): boolean {\n    if (this.map.has(key)) {\n      const oldValue = this.map.get(key)\n      const index = this.indexOf(oldValue!)\n      this.sortedKeys.splice(index, 1)\n      return this.map.delete(key)\n    }\n\n    return false\n  }\n\n  /**\n   * Checks if a key exists in the map\n   *\n   * @param key - The key to check\n   * @returns True if the key exists, false otherwise\n   */\n  has(key: TKey): boolean {\n    return this.map.has(key)\n  }\n\n  /**\n   * Removes all key-value pairs from the map\n   */\n  clear(): void {\n    this.map.clear()\n    this.sortedKeys = []\n  }\n\n  /**\n   * Gets the number of key-value pairs in the map\n   */\n  get size(): number {\n    return this.map.size\n  }\n\n  /**\n   * Default iterator that returns entries in sorted order\n   *\n   * @returns An iterator for the map's entries\n   */\n  *[Symbol.iterator](): IterableIterator<[TKey, TValue]> {\n    for (const key of this.sortedKeys) {\n      yield [key, this.map.get(key)!] as [TKey, TValue]\n    }\n  }\n\n  /**\n   * Returns an iterator for the map's entries in sorted order\n   *\n   * @returns An iterator for the map's entries\n   */\n  entries(): IterableIterator<[TKey, TValue]> {\n    return this[Symbol.iterator]()\n  }\n\n  /**\n   * Returns an iterator for the map's keys in sorted order\n   *\n   * @returns An iterator for the map's keys\n   */\n  keys(): IterableIterator<TKey> {\n    return this.sortedKeys[Symbol.iterator]()\n  }\n\n  /**\n   * Returns an iterator for the map's values in sorted order\n   *\n   * @returns An iterator for the map's values\n   */\n  values(): IterableIterator<TValue> {\n    return function* (this: SortedMap<TKey, TValue>) {\n      for (const key of this.sortedKeys) {\n        yield this.map.get(key)!\n      }\n    }.call(this)\n  }\n\n  /**\n   * Executes a callback function for each key-value pair in the map in sorted order\n   *\n   * @param callbackfn - 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