[medium.com]-ngx-crud-01.ts

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { Options } from './common.interface';
import { Id } from './common.type';
import { RequestBody, ResponseBody } from './example.interface';

import { environment } from '@env';

@Injectable()
export class ExampleService
{
	protected apiUrl : string = environment.apiUrl;
	protected endpoint : string = environment.routes.example;

	constructor(protected http : HttpClient)
	{
	}

	create(body : RequestBody, options? : Options) : Observable<ResponseBody>
	{
		return this.http.post<ResponseBody>(this.apiUrl + this.endpoint, body, options);
	}

	read(id : Id, options? : Options) : Observable<ResponseBody>
	{
		return this.http.get<ResponseBody>(this.apiUrl + this.endpoint + '/' + id, options);
	}

	find(options? : Options) : Observable<ResponseBody[]>
	{
		return this.http.get<ResponseBody[]>(this.apiUrl + this.endpoint, options);
	}

	update(id : Id, body : RequestBody, options? : Options) : Observable<ResponseBody>
	{
		return this.http.put<ResponseBody>(this.apiUrl + this.endpoint + '/' + id, body, options);
	}

	patch(id : Id, body : RequestBody, options? : Options) : Observable<ResponseBody>
	{
		return this.http.patch<ResponseBody>(this.apiUrl + this.endpoint + '/' + id, body, options);
	}

	delete(id : Id, options? : Options) : Observable<ResponseBody>
	{
		return this.http.delete<ResponseBody>(this.apiUrl + this.endpoint + '/' + id, options);
	}
}