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| /*
* @license
* Copyright Hôpitaux Universitaires de Genève. All Rights Reserved.
*
* Use of this source code is governed by an Apache-2.0 license that can be
* found in the LICENSE file at https://github.com/DSI-HUG/dejajs-components/blob/master/LICENSE
*/
import { from as observableFrom , Observable , of as observableOf } from 'rxjs';
import { map , reduce , switchMap , tap } from 'rxjs/operators';
import { IItemTree } from '../item-list/item-tree';
import { SortingService } from '../sorting/sorting.service';
import { IGroupInfo } from './group-infos';
/** Service de regroupement d'un tableau de modèles */
export class GroupingService {
/** Groupe les éléments de la liste hierarchique spécifiée à partir du niveau spécifié, et en fonction du modèle de groupe spécifié
* @param tree Liste à trier.
* @param groupInfos Modèle de groupe à appliquer.
* @param childrenField Champs à utiliser comme collection des enfants d'un parent.
* @param depth Niveau à partir duquel le modèle de regroupement doit être appliqué.
* @return Observable résolu par la fonction.
*/
public group$(tree: any[], groupInfos: IGroupInfo[] | IGroupInfo, childrenField = 'items'): Observable<any[]> {
if (!tree || tree.length === 0 || !groupInfos) {
return observableOf(tree);
}
if (groupInfos instanceof Array) {
// Create a observable stream with a sequence for each groupinfos.
let result$ = observableOf(tree);
groupInfos.forEach((groupInfo) => result$ = result$.pipe(switchMap((t) => this.group$(t, groupInfo, childrenField))));
return result$;
} else {
// Group the tree with the current groupInfo
const groupInfo = groupInfos as IGroupInfo;
if (!tree[0][childrenField]) {
// No children, group the tree
return this.groupChildren$(tree, groupInfo, 0, childrenField);
}
const groupTree$: any = (t: any[], curDepth: number) => {
return observableFrom(t).pipe(
switchMap((treeItem) => {
const children = treeItem[childrenField];
Iif (children[0] && children[0][childrenField]) {
return groupTree$(children, curDepth + 1).map(() => treeItem);
} else {
return this.groupChildren$(children, groupInfo, curDepth, childrenField).pipe(map((groupedChildren) => {
treeItem[childrenField] = groupedChildren;
return treeItem;
}));
}
}),
reduce((acc: any[], cur: any) => [...acc, cur], []));
};
// If the tree has chidren, group only the last level items
return groupTree$(tree, 1);
}
}
/**
* @deprecated > 06.11.2017
*/
public group(tree: any[], groupInfos: IGroupInfo[] | IGroupInfo, childrenField?: string) {
return this.group$(tree, groupInfos, childrenField).toPromise();
}
protected groupChildren$(list: any[], groupInfo: IGroupInfo, _depth: number, childrenField: string): Observable<any[]> {
return observableOf(list).pipe(
switchMap((l) => l),
reduce((groups: { [groupby: string]: IItemTree }, item) => {
let groupedBy = typeof groupInfo.groupByField === 'function' ? groupInfo.groupByField(item) : item[groupInfo.groupByField];
if (typeof item[groupedBy] === 'function') {
groupedBy = item[groupedBy]();
}
if (!groupedBy) {
groupedBy = this.getTextValue(item);
}
let parent = groups[groupedBy];
if (!parent) {
const groupLabel = groupInfo.groupTextField ? (typeof groupInfo.groupTextField === 'function' ? groupInfo.groupTextField(item) : item[groupInfo.groupTextField]) : groupedBy;
parent = groups[groupedBy] = {
depth: _depth,
toString: () => groupLabel,
$text: groupLabel,
} as IItemTree;
(<any>parent)[childrenField] = [];
}
(<any>parent)[childrenField].push(item);
return groups;
}, {}),
map((grps: { [groupby: string]: any }) => Object.keys(grps).map((key) => grps[key])),
tap((groupedChildren) => groupedChildren.forEach((parent) => parent.sortField = (groupInfo.sortInfos && groupInfo.sortInfos.name) || 'toString')),
switchMap((groupedChildren) => {
if (groupInfo.sortInfos) {
const sortingService = new SortingService();
return sortingService.sort$(groupedChildren, groupInfo.sortInfos);
} else {
return observableOf(groupedChildren);
}
}));
}
private getTextValue(value: any) {
Iif (!value) {
return '';
} else {
if (value.displayName) {
return typeof value.displayName === 'string' ? value.displayName : value.displayName();
} else Eif (typeof value.toString === 'function') {
return value.toString();
}
}
}
}
|