doneit-web/src/app/services/http.service.ts

import { HttpClient, HttpErrorResponse } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { ok, err, Result } from 'neverthrow';

@Injectable({
  providedIn: 'root'
})
export class HttpService {

  constructor(private http:HttpClient) { }

  async post<T>(url: string, body: any): Promise<Result<T, HttpErrorResponse>>  {

    try {
      const result = await this.http.post(url, body).toPromise()
      return ok (result as T)
    } catch (e) {
      return err(e as HttpErrorResponse)
    }
  }

  async get<T>(url: string): Promise<Result<T, HttpErrorResponse>>   {
    try {
      const result = await this.http.get<T>(url).toPromise()
      return ok (result as T)
    } catch (e) {
      return err(e as HttpErrorResponse)
    }
  }

  async put<T>(url: string, body: any): Promise<Result<T, HttpErrorResponse>>   {

    try {
      const result = await this.http.put<T>(url, body).toPromise()
      return ok (result as T)
    } catch (e) {
      return err(e as HttpErrorResponse)
    }

  }

  async delete<T>(url: string): Promise<Result<T, HttpErrorResponse>>   {

    try {
      const result = await this.http.delete<T>(url).toPromise()
      return ok (result as T)
    } catch (e) {
      return err(e as HttpErrorResponse)
    }
  }
}