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