import { HttpClient, HttpParams } from "@angular/common/http";
import { Injectable } from "@angular/core";
import { environment } from "@env";
import { Observable, throwError } from "rxjs";
import { catchError } from "rxjs/operators";

@Injectable()
export class ApiService {
  constructor(private http?: HttpClient) {}

  private formatErrors(error: any) {
    return throwError(error.error);
  }

  get(path: string, params: HttpParams = new HttpParams()): Observable<any> {
    return this.http.get(`${environment.API_URL}${path}`, { params }).pipe(catchError(this.formatErrors));
  }

  put(path: string, body: object = {}): Observable<any> {
    return this.http.put(`${environment.API_URL}${path}`, body).pipe(catchError(this.formatErrors));
  }

  post(path: string, body: object = {}): Observable<any> {
    return this.http.post(`${environment.API_URL}${path}`, body).pipe(catchError(this.formatErrors));
  }

  delete(path): Observable<any> {
    return this.http.delete(`${environment.API_URL}${path}`).pipe(catchError(this.formatErrors));
  }
}

import { NgModule } from "@angular/core";
import { CommonModule } from "@angular/common";
import { ApiService } from "./api.service";

@NgModule({
  declarations: [],
  imports: [CommonModule],
  providers: [ApiService],
})
export class ChatModule {}

import { Component } from "@angular/core";
import { ApiService } from "./api.service";

@Component({
  selector: "app-root",
  template: `
    <div>
      
    </div>
  `,
})
export class AppComponent {
  title: string;

  contructor(private apiService: ApiServise) {
    this.title = "My first title";
  }
}

return this.http.get<T>(`${environment.API_URL}${path}`, { params })...
return this.http.put<T>(`${environment.API_URL}${path}`, body)...
return this.http.post<T>(`${environment.API_URL}${path}`, body)...
return this.http.delete<T>(`${environment.API_URL}${path}`)...