My project includes 2 components:
collection.component.ts
import { Component, OnInit } from '@angular/core';
import { CollectService } from '../collect.service';
import { Collectable } from '../collectable.model';
import {Observable} from 'rxjs/Rx';
@Component({
selector: 'app-collection',
templateUrl: './collection.component.html',
styleUrls: ['./collection.component.css'],
providers: [CollectService]
})
export class CollectionComponent implements OnInit {
market: Collectable[] = [];
constructor(private _collectService: CollectService) { }
ngOnInit():any {
this._collectService.getMarket().then((collectable: Collectable[]) => {this.market = collectable});
}
remove(item: Collectable) {
this._collectService.removeFromMarket(item);
}
}
collection.component.html
<div class="row">
<div class="col-xs-12">
<ul class="list-group" *ngIf="market.length > 0">
<li class="list-group-item" *ngFor="let item of market">
<span class="badge">{{item.name}}</span>
<button class="btn btn-danger" (click)="remove(item)">Remove from Collection</button>
{{item.desc}}
</li>
</ul>
<h3 *ngIf="market.length === 0">Start adding items first!</h3>
</div>
</div>
market.component.ts
import { Component, OnInit } from '@angular/core';
import { CollectService } from '../collect.service';
import { Collectable } from '../collectable.model';
@Component({
selector: 'app-market',
templateUrl: './market.component.html',
styleUrls: ['./market.component.css'],
providers: [ CollectService ]
})
export class MarketComponent implements OnInit {
array: Collectable[] = [];
add(item) {
this._collectService.addToMarket(item);
}
constructor(private _collectService: CollectService) { }
ngOnInit() {
this.array = this._collectService.getCollectable();
}
}
market.component.html
<div class="row">
<div class="col-xs-12">
<ul class="list-group">
<li class="list-group-item" *ngFor="let item of array">
<span class="badge">{{item.name}}</span>
<button class="btn btn-success" (click)="add(item)">Add to Collection</button>
{{item.desc}}
</li>
</ul>
</div>
</div>
contact.service.ts
import { Injectable } from '@angular/core';
import { Collectable } from './collectable.model';
@Injectable()
export class CollectService {
private array: Collectable[] = [
new Collectable ('jQuery', 'A good framework!'),
{name: 'HTML', desc: 'A basic for web development!'},
{name: 'CSS', desc: 'A styling weapon!'},
{name: 'BootStrap', desc: 'A styling framework!'},
{name: 'Angular', desc: 'A SPA framework!'},
{name: 'React', desc: 'A SPA library!'},
{name: 'Redux', desc: 'Go find yourself!'},
];
private market: Collectable[] = [];
public getCollectable() {
return this.array;
}
public getMarket() {
return Promise.resolve(this.market);
}
addToMarket(item: Collectable) {
if (this.market.indexOf(item) == -1) {
Promise.resolve(this.market).then((collection: Collectable[])=>{
this.market.push(item);
});
console.log('Added item : ' + item.name + ' Desc : ' + item.desc);
}
console.log("Array entries : ");
for(let item2 of this.market){
console.log('Added item : ' + item2.name + ' Desc : ' + item2.desc);
}
}
removeFromMarket(item: Collectable) {
this.market.splice(this.market.indexOf(item), 1);
}
constructor() { }
}
I am currently working on a feature where I can move items from the market to the collection and then have an option to remove them from the collection as well.
Update : Upon investigating further, I noticed that the service data is not being retained when switching between components. Any suggestions on what might be causing this issue?