{
  "version": 3,
  "sources": ["src/app/typeahead/_models/selection-model.ts"],
  "sourcesContent": ["import {SelectionCompareFn} from \"./typeahead-settings\";\r\n\r\n/**\r\n * SelectionModel<T> is used for keeping track of multiple selections. Simple interface with ability to toggle.\r\n * @param selectedState Optional state to set selectedOptions to. If not passed, defaults to false.\r\n * @param selectedOptions Optional data elements to inform the SelectionModel of. If not passed, as toggle() occur, items are tracked.\r\n * @param propAccessor Optional string that points to a unique field within the T type. Used for quickly looking up.\r\n */\r\nexport class SelectionModel<T> {\r\n  _data!: Array<{value: T, selected: boolean}>;\r\n  _propAccessor: string = '';\r\n\r\n  constructor(selectedState: boolean = false, selectedOptions: Array<T> = [], propAccessor: string = '') {\r\n    this._data = [];\r\n\r\n    if (propAccessor != undefined || propAccessor !== '') {\r\n      this._propAccessor = propAccessor;\r\n    }\r\n\r\n    selectedOptions.forEach(d => {\r\n      this._data.push({value: d, selected: selectedState});\r\n    });\r\n  }\r\n\r\n  /**\r\n   * Will toggle if the data item is selected or not. If data option is not tracked, will add it and set state to true.\r\n   * @param data Item to toggle\r\n   * @param selectedState Force the state\r\n   * @param compareFn An optional function to use for the lookup, else will use shallowEqual implementation\r\n   */\r\n  toggle(data: T, selectedState?: boolean, compareFn?: SelectionCompareFn<T>) {\r\n    const lookupMethod = compareFn || this.defaultEqual;\r\n\r\n    const dataItem = this._data.filter(d => lookupMethod(d.value, data));\r\n    if (dataItem.length > 0) {\r\n      if (selectedState != undefined) {\r\n        dataItem[0].selected = selectedState;\r\n      } else {\r\n        dataItem[0].selected = !dataItem[0].selected;\r\n      }\r\n    } else {\r\n      this._data.push({value: data, selected: (selectedState === undefined ? true : selectedState)});\r\n    }\r\n  }\r\n\r\n\r\n  /**\r\n   * Is the passed item selected\r\n   * @param data item to check against\r\n   * @param compareFn optional method to use to perform comparisons\r\n   * @returns boolean\r\n   */\r\n  isSelected(data: T, compareFn?: SelectionCompareFn<T>): boolean {\r\n    const lookupMethod = compareFn || this.defaultEqual;\r\n\r\n    const dataItem = this._data.filter(d => lookupMethod(d.value, data));\r\n\r\n    if (dataItem.length > 0) {\r\n      return dataItem[0].selected;\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /**\r\n   *\r\n   * @returns If some of the items are selected, but not all\r\n   */\r\n  hasSomeSelected(): boolean {\r\n    const selectedCount = this._data.filter(d => d.selected).length;\r\n    return (selectedCount !== this._data.length && selectedCount !== 0)\r\n  }\r\n\r\n  /**\r\n   *\r\n   * @returns All Selected items\r\n   */\r\n  selected(): Array<T> {\r\n    return this._data.filter(d => d.selected).map(d => d.value);\r\n  }\r\n\r\n  /**\r\n   *\r\n   * @returns All Non-Selected items\r\n   */\r\n  unselected(): Array<T> {\r\n    return this._data.filter(d => !d.selected).map(d => d.value);\r\n  }\r\n\r\n  /**\r\n   *\r\n   * @returns Last element added/tracked or undefined if nothing is tracked\r\n   */\r\n  peek(): T | undefined {\r\n    if (this._data.length > 0) {\r\n      return this._data[this._data.length - 1].value;\r\n    }\r\n\r\n    return undefined;\r\n  }\r\n\r\n  private defaultEqual = (a: T, b: T): boolean => {\r\n    if (typeof a === 'object' && a !== null && typeof b === 'object' && b !== null) {\r\n      return this.shallowEqual(a, b);\r\n    }\r\n    return a === b;\r\n  }\r\n\r\n  private shallowEqual(a: object, b: object): boolean {\r\n    for (const key in a) {\r\n      if (!(key in b) || (a as any)[key] !== (b as any)[key]) {\r\n        return false;\r\n      }\r\n    }\r\n    for (const key in b) {\r\n      if (!(key in a)) {\r\n        return false;\r\n      }\r\n    }\r\n    return true;\r\n  }\r\n}\r\n"],
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  "names": ["SelectionModel", "constructor", "selectedState", "selectedOptions", "propAccessor", "_propAccessor", "defaultEqual", "a", "b", "shallowEqual", "_data", "undefined", "forEach", "d", "push", "value", "selected", "toggle", "data", "compareFn", "lookupMethod", "dataItem", "filter", "length", "isSelected", "hasSomeSelected", "selectedCount", "map", "unselected", "peek", "key"]
}