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import {Injectable} from '@angular/core';
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import {HttpClient, HttpErrorResponse, HttpParams} from '@angular/common/http';
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import {throwError} from 'rxjs';
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import {environment} from '../../../environments/environment';
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import {MatSnackBar} from '@angular/material';
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@Injectable({
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providedIn: 'root'
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})
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export class BasicService {
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protected baseUrl = environment.apiUrl;
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constructor(protected http: HttpClient, protected snackBar: MatSnackBar) { }
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protected handleError(error: HttpErrorResponse) {
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if (error.error instanceof ErrorEvent) {
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console.error('An error occurred:', error.error.message);
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} else {
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console.error(
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`Backend returned code ${error.status}, ` +
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`body was: ${error.error}`);
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}
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this.snackBar.open('Komunikace se serverem se nezdařila', 'Zavřít');
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return throwError(
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'Something bad happened; please try again later.');
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}
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/**
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* Creates http parameters (query for request) for given
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* object (parameter - value), if the value is null
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* it's not added into the query
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* @param params object from which the query is created
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*/
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protected createParams(params: any) {
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let httpParams = new HttpParams();
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for (const key in params) {
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if (params.hasOwnProperty(key)) {
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if (params[key] != null) {
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httpParams = httpParams.set(key, params[key]);
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}
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}
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}
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return httpParams;
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}
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}
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