@taiga-ui/kit
Version:
Taiga UI Angular main components kit
31 lines • 5.83 kB
JavaScript
import { inject, Injectable } from '@angular/core';
import { map, mergeMap, startWith, Subject, tap } from 'rxjs';
import { TUI_TREE_LOADER, TUI_TREE_LOADING, TUI_TREE_START } from './tree.tokens';
import * as i0 from "@angular/core";
class TuiTreeService {
constructor() {
this.loading = inject(TUI_TREE_LOADING);
this.start = inject(TUI_TREE_START);
this.loader = inject(TUI_TREE_LOADER);
this.map = new Map([[this.loading, []]]);
this.load$ = new Subject();
this.data$ = this.load$.pipe(mergeMap((item) => this.loader.loadChildren(item).pipe(tap((children) => this.map.set(item, children)), map((children) => children.filter((item) => !this.loader.hasChildren(item))), tap((children) => children.forEach((child) => this.map.set(child, []))))), startWith(null), map(() => this.start));
}
getChildren(item) {
return this.map.get(item) || [this.loading];
}
loadChildren(item) {
if (this.map.get(item)) {
return;
}
this.map.set(item, [this.loading]);
this.load$.next(item);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiTreeService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiTreeService }); }
}
export { TuiTreeService };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiTreeService, decorators: [{
type: Injectable
}] });
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