angular-calendar-timeline
Version:
A timeline for angular that shows events on a timeline board in different modes: days, weeks, and months.
106 lines • 13.4 kB
JavaScript
export class ItemsIterator {
constructor() {
this._items = [];
}
get items() {
return this._items;
}
setItems(items) {
this._items = items;
this._validate();
this._createItemsLevels();
}
isEmpty() {
return !this._items?.length;
}
getFirstItem(onlyVisible) {
let firstItem = null;
this.forEach((item, parent) => {
if (!item.startDate || !item.endDate) {
return;
}
if (!firstItem || new Date(firstItem.startDate).getTime() > new Date(item.startDate).getTime()) {
firstItem = item;
}
}, onlyVisible);
return firstItem;
}
getLastItem(onlyVisible) {
let lastItem = null;
this.forEach((item, parent) => {
if (!item.startDate || !item.endDate) {
return;
}
if (!lastItem || new Date(lastItem.endDate).getTime() < new Date(item.endDate).getTime()) {
lastItem = item;
}
}, onlyVisible);
return lastItem;
}
forEach(handler, onlyVisible = false) {
function iterateAll(items, parent) {
(items ?? []).forEach(item => {
handler(item, parent);
iterateAll(item.streamItems ?? [], item);
if (!onlyVisible || item.childrenItemsExpanded) {
iterateAll(item.childrenItems ?? [], item);
}
});
}
iterateAll(this._items, null);
}
_createItemsLevels() {
this.forEach((item, parent) => {
if (item.streamItems) {
item._streamLevels = this._createItemLevels(item);
}
});
}
_createItemLevels(item) {
const levels = [];
item.streamItems.forEach(item => {
let isLevelFound = false;
let currentLevelIndex = 0;
while (!isLevelFound) {
const levelItems = levels[currentLevelIndex];
if (!levelItems) {
levels[currentLevelIndex] = [item];
isLevelFound = true;
break;
}
const isItemCollides = levelItems.some(levelItem => this._isItemsCollides(levelItem, item));
if (!isItemCollides) {
levels[currentLevelIndex].push(item);
isLevelFound = true;
break;
}
currentLevelIndex++;
}
});
return levels;
}
_isItemsCollides(item1, item2) {
const item1Start = item1._left;
const item1End = item1._left + item1._width;
const item2Start = item2._left;
const item2End = item2._left + item2._width;
return item1Start === item2Start || item1End === item2End ||
item1End > item2Start && item1Start < item2End ||
item2End > item1Start && item2Start < item1End;
}
_validate() {
this.forEach((item) => {
if ((item.startDate && !item.endDate) || (item.endDate && !item.startDate)) {
this._removeItemDates(item);
}
if (item.streamItems) {
this._removeItemDates(item);
}
});
}
_removeItemDates(item) {
delete item.startDate;
delete item.endDate;
}
}
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{ ITimelineItem, IItemsIterator } from \"../models\";\r\n\r\nexport class ItemsIterator implements IItemsIterator {\r\n  private _items: ITimelineItem[] = [];\r\n\r\n  get items(): ITimelineItem[] {\r\n    return this._items;\r\n  }\r\n\r\n  setItems(items: ITimelineItem[]) {\r\n    this._items = items;\r\n    this._validate();\r\n    this._createItemsLevels();\r\n  }\r\n\r\n  isEmpty(): boolean {\r\n    return !this._items?.length;\r\n  }\r\n\r\n  getFirstItem(onlyVisible: boolean): ITimelineItem {\r\n    let firstItem = null;\r\n\r\n    this.forEach((item, parent) => {\r\n      if (!item.startDate || !item.endDate) {\r\n        return;\r\n      }\r\n\r\n      if (!firstItem || new Date(firstItem.startDate).getTime() > new Date(item.startDate).getTime()) {\r\n        firstItem = item;\r\n      }\r\n    }, onlyVisible);\r\n\r\n    return firstItem;\r\n  }\r\n\r\n  getLastItem(onlyVisible: boolean): ITimelineItem {\r\n    let lastItem = null;\r\n\r\n    this.forEach((item, parent) => {\r\n      if (!item.startDate || !item.endDate) {\r\n        return;\r\n      }\r\n\r\n      if (!lastItem || new Date(lastItem.endDate).getTime() < new Date(item.endDate).getTime()) {\r\n        lastItem = item;\r\n      }\r\n    }, onlyVisible);\r\n\r\n    return lastItem;\r\n  }\r\n\r\n  forEach(handler: (item: ITimelineItem, parent: (ITimelineItem | null)) => void, onlyVisible = false): void {\r\n    function iterateAll(items: ITimelineItem[], parent: ITimelineItem | null): void {\r\n      (items ?? []).forEach(item => {\r\n        handler(item, parent);\r\n        iterateAll(item.streamItems ?? [], item);\r\n        if (!onlyVisible || item.childrenItemsExpanded) {\r\n          iterateAll(item.childrenItems ?? [], item);\r\n        }\r\n      });\r\n    }\r\n\r\n    iterateAll(this._items, null);\r\n  }\r\n\r\n  private _createItemsLevels(): void {\r\n    this.forEach((item, parent) => {\r\n      if (item.streamItems) {\r\n        item._streamLevels = this._createItemLevels(item);\r\n      }\r\n    });\r\n  }\r\n\r\n  private _createItemLevels(item: ITimelineItem): ITimelineItem[][] {\r\n    const levels: ITimelineItem[][] = [];\r\n\r\n    item.streamItems.forEach(item => {\r\n      let isLevelFound = false;\r\n      let currentLevelIndex = 0;\r\n        while (!isLevelFound) {\r\n\r\n        const levelItems = levels[currentLevelIndex];\r\n        if (!levelItems) {\r\n          levels[currentLevelIndex] = [item];\r\n          isLevelFound = true;\r\n          break;\r\n        }\r\n\r\n        const isItemCollides = levelItems.some(levelItem => this._isItemsCollides(levelItem, item));\r\n        if (!isItemCollides) {\r\n          levels[currentLevelIndex].push(item);\r\n          isLevelFound = true;\r\n          break;\r\n        }\r\n\r\n        currentLevelIndex++;\r\n      }\r\n    })\r\n\r\n    return levels;\r\n  }\r\n\r\n  private _isItemsCollides(item1: ITimelineItem, item2: ITimelineItem): boolean {\r\n    const item1Start = item1._left;\r\n    const item1End = item1._left + item1._width;\r\n    const item2Start = item2._left;\r\n    const item2End = item2._left + item2._width;\r\n\r\n    return item1Start === item2Start || item1End === item2End ||\r\n      item1End > item2Start && item1Start < item2End ||\r\n      item2End > item1Start && item2Start < item1End;\r\n  }\r\n\r\n  private _validate(): void {\r\n    this.forEach((item: ITimelineItem) => {\r\n      if ((item.startDate && !item.endDate) || (item.endDate && !item.startDate)) {\r\n        this._removeItemDates(item);\r\n      }\r\n\r\n      if (item.streamItems) {\r\n        this._removeItemDates(item);\r\n      }\r\n    });\r\n  }\r\n\r\n  private _removeItemDates(item: ITimelineItem): void {\r\n    delete item.startDate;\r\n    delete item.endDate;\r\n  }\r\n}\r\n"]}