Merge pull request #12 from tuckerevans/REST-service

Backend REST Service implementation

2 files changed, 105 insertions, 0 deletions

diff --git a/recipeBuddy/src/app/REST_service/backend.service.spec.ts b/recipeBuddy/src/app/REST_service/backend.service.spec.ts
new file mode 100644
index 0000000..2fe8217
--- /dev/null
+++ b/recipeBuddy/src/app/REST_service/backend.service.spec.ts
@@ -0,0 +1,12 @@
+import { TestBed } from '@angular/core/testing';
+
+import { BackendService } from './backend.service';
+
+describe('BackendService', () => {
+  beforeEach(() => TestBed.configureTestingModule({}));
+
+  it('should be created', () => {
+    const service: BackendService = TestBed.get(BackendService);
+    expect(service).toBeTruthy();
+  });
+});
diff --git a/recipeBuddy/src/app/REST_service/backend.service.ts b/recipeBuddy/src/app/REST_service/backend.service.ts
new file mode 100644
index 0000000..1a2d933
--- /dev/null
+++ b/recipeBuddy/src/app/REST_service/backend.service.ts
@@ -0,0 +1,93 @@
+import { Injectable } from '@angular/core'
+import { HttpClient, HttpHeaders } from '@angular/common/http'
+import { Observable, throwError } from 'rxjs'
+import { retry, catchError, map } from 'rxjs/operators'
+import { Recipe } from '../DataModels/recipe'
+
+
+export interface Status {
+	Code: number;
+	Msg: string;
+}
+export interface MsgList {
+	Status: Status;
+	Data: number[];
+}
+
+export interface Msg {
+	Status: Status;
+	Data: Recipe;
+}
+
+
+@Injectable({ providedIn: 'root' })
+
+/* BackendService class based on tutorial at:
+ * <https://www.positronx.io/angular-8-httpclient-http-tutorial-build-consume-restful-api/>
+ */
+export class BackendService {
+	apiURL = 'http://api.recipebuddy.xyz:8888'
+
+	constructor( private http: HttpClient)
+	{
+	}
+
+	httpOptions = {headers: new HttpHeaders(
+		{'Content-Type':'application/json'}
+	)}
+
+
+	getRecipes(): Observable<number[]>
+	{
+		return this.http.get<MsgList>(this.apiURL + '/recipes')
+			.pipe (
+				retry(1),
+				map(msg => msg.Data),
+				catchError(this.handleError)
+			)
+	}
+
+
+	getRecipe(id): Observable<Recipe>
+	{
+		return this.http.get<Msg>(this.apiURL + '/recipes/' + id)
+			.pipe (
+				retry(1),
+				map(msg => msg.Data),
+				catchError(this.handleError)
+			)
+	}
+
+	createRecipe(data): Observable<Recipe>
+	{
+		return this.http.post<Recipe>(this.apiURL + '/recipes',
+			JSON.stringify(data), this.httpOptions)
+	}
+
+	updateRecipe(data): Observable<Recipe>
+	{
+		return this.http.put<Recipe>(this.apiURL + '/recipes/' + data.id,
+			JSON.stringify(data), this.httpOptions)
+	}
+
+	deleteRecipe(id): Observable<Msg>
+	{
+		return this.http.delete<Msg>(this.apiURL + '/recipes/' + id)
+			.pipe (
+				retry(1),
+				catchError(this.handleError)
+			)
+	}
+
+	handleError(error) {
+		let errMsg = '';
+		if (error.error instanceof ErrorEvent) {
+			errMsg = error.error.message;
+		} else {
+			errMsg = 'Error API';
+		}
+		console.log(errMsg)
+		window.alert(errMsg)
+		return throwError(errMsg);
+	}
+}