Created
November 4, 2017 07:09
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Modular Service / Provider in Angular
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@Component() | |
export class CategoryComponent { | |
constructor(@Inject("ShopCategoryProvider") public shopCategoryProvider) { | |
shopCategoryProvider.getCategories().subscribe(response=>{ | |
// Do stuff with data | |
}); | |
} |
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export interface IShopCategoryProvider { | |
getCategories(): Observable<any>; | |
} |
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export let shopCategoryFactory = (networkHelper: NetworkHelper, returnService1:boolean): IShopCategoryProvider => { | |
if(returnService1) | |
return new ShopCategoryProvider1(networkHelper); | |
} else { | |
return new ShopCategoryProvider2(networkHelper); | |
} | |
}; |
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@NgModule({ | |
imports: [NetworkModule], | |
providers: [ | |
{ | |
provide: "ShopCategoryProvider", | |
useFactory: shopCategoryFactory, | |
deps: [NetworkHelper,true], | |
multi: false | |
} | |
] | |
}) | |
export class ProvidersModule { } |
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@Injectable() | |
export class ShopCategoryProvider1 implements IShopCategoryProvider { | |
constructor(private networkHelper: NetworkHelper) { | |
} | |
getCategories(): Observable<any> { | |
// Do some stuff and return data | |
return Observable.empty(); | |
} | |
} |
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@Injectable() | |
export class ShopCategoryProvider2 implements IShopCategoryProvider { | |
constructor(private networkHelper: NetworkHelper) { | |
} | |
getCategories(): Observable<any> { | |
// Do some stuff and return data | |
return Observable.empty(); | |
} | |
} |
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