controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\bidang as Bidang;
use App\User as user;

class Admin extends Controller
{
    protected $rules = [
        'bidang' => 'required'
    ];

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {

        $parent = Bidang::with('children')->where('id_parent', '=', 0)->get();

        return response()->json($parent);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    //function add bidang
    public function storeBidang(Request $request)
    {
        if (!is_array($request->all())) {
            return ['error' => 'request harus berbentuk array'];
        }

        try{

           $validator = \Validator::make($request->all(), $this->rules);

           if ($validator->fails()) {

               return response()->json([
                    'updated' => false,
                    'errors' => $validator->errors()->all()
                ], 500);
           }
           else{

                $bidang = new Bidang;
                $id = 0;

                $bidang->nama = $request->input('bidang');
                $bidang->id_parent = $id;
                $bidang->save();

                return response()->json($bidang, 201);
           }

        }

        catch(Exception $e){
            \Log::info('Error Creating data bidang');
            return response()->json(['created' => false], 500);
        }

    }

    //function add subbidang
    public function storeSubBidang(Request $request)
    {
        if (!is_array($request->all())) {
            return ['error' => 'request harus berbentuk array'];
        }

        try{

           $validator = \Validator::make($request->all(), $this->rules);

           if ($validator->fails()) {

               return response()->json([
                    'updated' => false,
                    'errors' => $validator->errors()->all()
                ], 500);
           }
           else{

                $bidang = new Bidang;

                $bidang->id_parent = $request->input('bidang');
                $bidang->nama = $request->input('subbidang');
                $bidang->save();

                return response()->json($bidang, 201);
           }

        }

        catch(Exception $e){
            \Log::info('Error Creating data bidang');
            return response()->json(['created' => false], 500);
        }

    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function updateBidang(Request $request, $id)
    {

        if (!is_array($request->all())) {
            return ['error' => 'request harus berbentuk array'];
        }

        try{

           $validator = \Validator::make($request->all(), $this->rules);

           if ($validator->fails()) {

               return response()->json([
                    'updated' => false,
                    'errors' => $validator->errors()->all()
                ], 500);
           }
           else{

                $bidang = Bidang::find($id);
                $bidang->nama = $request->input('bidang');
                $bidang->save();

                return response()->json([
                    'data' => $bidang,
                    'updated' => true
                ],201);
           }

        }

        catch(Exception $e){
            \Log::info('Error Creating data bidang');
            return response()->json(['created' => false], 500);
        }
    }

    //delete bidang
    public function destroyBidang($id)
    {
        $bidang = Bidang::find($id);
        $children = Bidang::find($id)->where('id_parent','=',$id);
        $bidang->delete();
        $children->delete();

        return response()->json([
            'status' => 'bidang telah dihapus'
        ]);
    }

    public function destroySubBidang($id)
    {
        $children = Bidang::find($id);
        $children->delete();

        return response()->json([
            'status' => 'bidang telah dihapus'
        ]);
    }

    public function register(Request $request){

        $user = new user;
        $user->name = $request->input('nama');
        $user->email = $request->input('email');
        $user->password = $request->input('password');
        $user->save();

        return response()->json([
            "message" => 'sukses'

        ], 200)
    }
}