128 lines
4.0 KiB
TypeScript
128 lines
4.0 KiB
TypeScript
import { EventEmitter, ViewChild } from '@angular/core';
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import { MatSnackBar } from '@angular/material/snack-bar';
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import { Title } from '@angular/platform-browser';
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import { TranslateService } from '@ngx-translate/core';
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import { PromptService } from 'app/core/ui-services/prompt.service';
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import { SortingTreeComponent } from 'app/shared/components/sorting-tree/sorting-tree.component';
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import { Identifiable } from 'app/shared/models/base/identifiable';
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import { CanComponentDeactivate } from 'app/shared/utils/watch-sorting-tree.guard';
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import { BaseViewComponent } from './base-view';
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import { BaseViewModel } from './base-view-model';
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export interface SortTreeFilterOption extends Identifiable {
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label: string;
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id: number;
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state: boolean;
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}
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/**
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* Abstract Sort view for hierarchic item trees
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*/
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export abstract class SortTreeViewComponent<V extends BaseViewModel> extends BaseViewComponent
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implements CanComponentDeactivate {
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/**
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* Reference to the view child
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*/
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@ViewChild('osSortedTree', { static: true })
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public osSortTree: SortingTreeComponent<V>;
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/**
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* Emitter to emit if the nodes should expand or collapse.
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*/
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public readonly changeState: EventEmitter<Boolean> = new EventEmitter<Boolean>();
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/**
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* Emitter that emits the filters to the sorting tree.
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* TODO note that the boolean function currently requires false if the item
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* is to be visible!
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*/
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public readonly changeFilter: EventEmitter<(item: V) => boolean> = new EventEmitter<(item: V) => boolean>();
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/**
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* Boolean to check if changes has been made.
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*/
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public hasChanged = false;
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/**
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* Boolean to check if filters are active, so they could be removed.
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*/
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public hasActiveFilter = false;
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/**
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* Array that holds the number of visible nodes(0) and amount of available
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* nodes(1).
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*/
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public seenNodes: [number, number] = [0, 0];
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/**
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* Updates the incoming/changing agenda items.
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* @param title
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* @param translate
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* @param matSnackBar
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* @param promptService
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*/
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public constructor(
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title: Title,
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public translate: TranslateService,
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matSnackBar: MatSnackBar,
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protected promptService: PromptService
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) {
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super(title, translate, matSnackBar);
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}
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/**
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* Function to restore the old state.
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*/
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public async onCancel(): Promise<void> {
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if (await this.canDeactivate()) {
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this.osSortTree.setSubscription();
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}
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}
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/**
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* Function to set an info if changes has been made.
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*
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* @param hasChanged Boolean received from the tree to see that changes has been made.
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*/
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public receiveChanges(hasChanged: boolean): void {
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this.hasChanged = hasChanged;
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}
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/**
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* Function to receive the new number of visible nodes when the filter has changed.
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*
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* @param nextNumberOfSeenNodes is an array with two indices:
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* The first gives the number of currently shown nodes.
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* The second tells how many nodes available.
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*/
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public onChangeAmountOfItems(nextNumberOfSeenNodes: [number, number]): void {
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this.seenNodes = nextNumberOfSeenNodes;
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}
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/**
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* Function to emit if the nodes should be expanded or collapsed.
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*
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* @param nextState Is the next state, expanded or collapsed, the nodes should be.
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*/
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public onStateChange(nextState: boolean): void {
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this.changeState.emit(nextState);
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}
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/**
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* Function to open a prompt dialog, so the user will be warned if they have
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* made changes and not saved them.
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*
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* @returns The result from the prompt dialog.
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*/
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public async canDeactivate(): Promise<boolean> {
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if (this.hasChanged) {
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const title = this.translate.instant('Do you really want to exit this page?');
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const content = this.translate.instant('You made changes.');
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return await this.promptService.open(title, content);
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}
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return true;
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}
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}
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