navigation-service.service.ts
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	import {EventEmitter, Injectable} from '@angular/core';
	import {NavigationEntity} from "../models/models";
	import {NietzscheSourceSeviceService} from "./nietzsche-source-sevice.service";
	import {Subscription} from "rxjs/index";
	import {ActivatedRoute} from "@angular/router";

	@Injectable({
	providedIn: 'root'
	})
	export class NavigationServiceService {

	constructor(private nietzscheSourceService: NietzscheSourceSeviceService, private activatedRoute: ActivatedRoute) { }

	selectedManuscript: NavigationEntity;
	selectedPage: NavigationEntity;
	selectedWord: NavigationEntity;

	navTreeDataChange = new EventEmitter<Array<NavigationEntity>>();
	navTreeData: Array<NavigationEntity>;

	manuscriptNavTree: Array<NavigationEntity> = [];
	pageNavTree: Array<NavigationEntity> = [];

	selectManuscript(id: string) {
	// this.selectedManuscript = {};
	}

	setActiveNavigationTree(view: string) {
	switch (view) {
	case 'manuscript':
	this.navTreeData = this.manuscriptNavTree;
	break;
	case 'page':
	this.navTreeData = this.manuscriptNavTree;
	break;
	case 'rhizome':
	this.navTreeData = this.manuscriptNavTree;
	break;
	}
	this.navTreeDataChange.emit(this.navTreeData);
	}

	createManuscriptNavTree() {
	this.nietzscheSourceService.getConvolutes().subscribe( res => {
	const convolutes = res.result.children;
	convolutes.forEach(x => {
	const man = new NavigationEntity(x.id, x.api_retrieve_content);
	this.manuscriptNavTree.push(man); });
	this.navTreeDataChange.emit(this.manuscriptNavTree);
	}
	);
	}
	}