94 lines
2.3 KiB
JavaScript
94 lines
2.3 KiB
JavaScript
'use strict';
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const events = require('../events.js');
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class AbstractList extends events.EventTarget {
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constructor() {
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super();
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this._list = [];
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}
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static fromResponse(response) {
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const ret = new this();
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for (let item of response) {
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const addedItem = this._itemClass.fromResponse(item);
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if (addedItem.addEventListener) {
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addedItem.addEventListener('delete', e => {
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ret.remove(addedItem);
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});
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addedItem.addEventListener('change', e => {
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ret.dispatchEvent(new CustomEvent('change', {
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detail: e.detail,
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}));
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});
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}
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ret._list.push(addedItem);
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}
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return ret;
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}
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sync(plainList) {
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this.clear();
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for (let item of (plainList || [])) {
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this.add(this.constructor._itemClass.fromResponse(item));
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}
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}
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add(item) {
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if (item.addEventListener) {
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item.addEventListener('delete', e => {
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this.remove(item);
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});
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item.addEventListener('change', e => {
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this.dispatchEvent(new CustomEvent('change', {
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detail: e.detail,
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}));
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});
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}
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this._list.push(item);
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const detail = {};
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detail[this.constructor._itemName] = item;
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this.dispatchEvent(new CustomEvent('add', {
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detail: detail,
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}));
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}
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clear() {
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for (let item of [...this._list]) {
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this.remove(item);
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}
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}
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remove(itemToRemove) {
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for (let [index, item] of this._list.entries()) {
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if (item !== itemToRemove) {
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continue;
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}
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this._list.splice(index, 1);
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const detail = {};
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detail[this.constructor._itemName] = itemToRemove;
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this.dispatchEvent(new CustomEvent('remove', {
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detail: detail,
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}));
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return;
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}
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}
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get length() {
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return this._list.length;
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}
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at(index) {
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return this._list[index];
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}
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map(...args) {
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return this._list.map(...args);
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}
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[Symbol.iterator]() {
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return this._list[Symbol.iterator]();
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}
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}
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module.exports = AbstractList;
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