1 files changed, 113 insertions, 0 deletions
diff --git a/src/app/services/language.service.ts b/src/app/services/language.service.ts
new file mode 100644
index 0000000..15e241f
--- /dev/null
+++ b/src/app/services/language.service.ts
@@ -0,0 +1,113 @@
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Guid } from 'guid-typescript';
+import { Observable } from 'rxjs';
+import { Language } from 'src/models/language';
+import { AppConstants } from '../app-constants.module';
+import { TokenService } from './token.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class LanguageService {
+  constructor(private _http: HttpClient, private _tokenService: TokenService)
+  { }
+
+  /* Requests from session storage */
+
+  createLanguageWithSessionStorageRequest(name: string): Observable<object> {
+    const token = this._tokenService.getTokenFromSessionStorage();
+
+    return this.createLanguageRequest(name, token);
+  }
+
+  getAllLanguagesWithSessionStorageRequest(): Observable<object> {
+    const token = this._tokenService.getTokenFromSessionStorage();
+
+    return this.getAllLanguagesRequest(token);
+  }
+
+  putLanguageWithSessionStorageRequest(langId: Guid, newName: string): Observable<object> {
+    const token = this._tokenService.getTokenFromSessionStorage();
+
+    return this.putLanguageRequest(token, langId, newName);
+  }
+
+  deleteLanguageWithSessionStorageRequest(langId: Guid): Observable<object> {
+    const token = this._tokenService.getTokenFromSessionStorage();
+
+    return this.deleteLanguageRequest(token, langId);
+  }
+
+  /* Language requests */
+
+  createLanguageRequest(name: string, authToken: string): Observable<object> {
+    const body = {
+      name: name
+    };
+    const options = {
+      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
+    };
+    return this._http.post(AppConstants.API_LANGUAGE_URL, body, options);
+  }
+
+  getLanguageRequest(langId: Guid): Observable<object> {
+    const options = {
+      params: new HttpParams().set('Id', langId.toString()),
+    };
+    return this._http.get(AppConstants.API_LANGUAGE_URL, options);
+  }
+
+  getAllLanguagesRequest(authToken: string): Observable<object> {
+    const options = {
+      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
+    };
+    return this._http.get(AppConstants.API_LANGUAGE_URL + '/GetLanguages', options);
+  }
+
+  getFullLanguagesFromIncomplete(givenLanguages: Language[]): Promise<Language[]> {
+    if (givenLanguages.length === 0) {
+      return new Promise(resolve => resolve(givenLanguages));
+    }
+
+    // This accepts language array with incomplete languages, meaning
+    // languages that only have an id, but no name
+    return new Promise(resolve => {
+      const lastGuid = givenLanguages[givenLanguages.length - 1].id;
+
+      // For each language, request his name and assign it
+      for (const lang of givenLanguages) {
+        this.getLanguageRequest(lang.id).subscribe(
+          (result: object) => {
+            // this only assigns the "name" property to the language,
+            // because only the name is returned from the request
+            Object.assign(lang, result);
+
+            if (lastGuid === lang.id) {
+              resolve(givenLanguages);
+            }
+          }
+        );
+      }
+    });
+  }
+
+  putLanguageRequest(authToken: string, langId: Guid, newName: string): Observable<object> {
+    const body = {
+      name: newName
+    };
+    const options = {
+      params: new HttpParams().set('Id', langId.toString()),
+      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
+    };
+    return this._http.put(AppConstants.API_LANGUAGE_URL, body, options);
+  }
+
+  deleteLanguageRequest(authToken: string, langId: Guid): Observable<object> {
+    const options = {
+      params: new HttpParams().set('Id', langId.toString()),
+      headers: new HttpHeaders().set('Authorization', 'Bearer ' + authToken)
+    };
+    return this._http.delete(AppConstants.API_LANGUAGE_URL, options);
+  }
+}