Angular - Service Files

import { Injectable } from '@angular/core';

import { HttpClient } from '@angular/common/http';

import { Observable } from 'rxjs';

import { Department } from '../models/department';

@Injectable({

    providedIn: 'root',

})

export class DepartmentService {

    private apiUrl = 'api/departments'; // Replace with your API URL

    constructor(private http: HttpClient) { }

    // Get all departments

    getDepartments(): Observable<Department[]> {

        return this.http.get<Department[]>(this.apiUrl);

    }

    // Get a department by ID

    getDepartmentById(id: number): Observable<Department> {

        return this.http.get<Department>(`${this.apiUrl}/${id}`);

    }

    // Create a new department

    createDepartment(department: Department): Observable<Department> {

        return this.http.post<Department>(this.apiUrl, department);

    }

    // Update a department

    updateDepartment(id: number, department: Department): Observable<Department> {

        return this.http.put<Department>(`${this.apiUrl}/${id}`, department);

    }

    // Delete a department

    deleteDepartment(id: number): Observable<void> {

        return this.http.delete<void>(`${this.apiUrl}/${id}`);

    }

}