TransaksiController

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
// use Illuminate\Support\Facades\Validator;
use App\Pelanggan;
use App\Produk;
use App\ProdukHarga;
use App\Transaksi;
use Carbon\Carbon;
use DB;

class TransaksiController extends Controller
{
    public function formTransaksi()
    {
        $pelanggan = Pelanggan::orderBy('nama', 'ASC')->get();
        $produk = Produk::orderBy('varian', 'ASC')->get();
        return view('transaksi.form', compact('pelanggan', 'produk'));
    }

    public function getHargaProduk()
    {
        $harga = ProdukHarga::where('produk_id', request()->id)->get();
        return response()->json(['status' => 'success', 'data' => $harga]);
    }

    public function saveTransaksi(Request $request)
    {
        //VALIDASI
        $this->validate($request, [
            'tipe_pelanggan' => 'required',
            'produk_id' => 'required|exist:produk,id',
            'layanan' => 'required|exist:produk_harga,id',
            'jaminan' => 'required',
            'foto_jaminan' => 'required|image|mimes:jpg,jpeg,png,gif',
            'tgl_pinjam' => 'required|date',
            'lama_pinjam' => 'required'
        ]);

        $this->validate($request, [
            'varian' => 'required|string|max:50',
            'merk' => 'required|string|max:20',
            'plat' => 'required|string|unique:produk',
            'gambar' => 'required|image|mimes:png,jpg,jpeg,gif'
        ]);

        DB::beginTransaction();
        try {
            //PELANGGAN BARU
            if ($request->tipe_pelanggan == 0) {
                //HANDLE FILE UPDATE
                $ktpFile = $request->file('foto_ktp');
                $filename = $request->nik . '.' . $ktpFile->getClientOriginalExtension();
                $ktpFile->storeAs('public/pelanggan', $filename);

                $pelanggan = Pelanggan::create([
                    'nik' => $request->nik,
                    'foto_ktp' =>$request->$filename,
                    'nama' => $request->nama,
                    'notelp' =>$request->nama,
                    'alamat' =>$request->alamat
                ]);
            } else {
                //PELANGGAN LAMA
                $pelanggan = Pelanggan::find($request->pelanggan_id);
            }

            $existing = Transaksi::orderBy('created_at', 'DESC')->first();
            $faktur = 'PP-';
            if($existing){
                //Nomor Faktur diawali dari PP-1 dst
                $explode = explode('-', $existing->faktur);
                $faktur = 'PP-' . $explode[1] + 1;
            }

            $jaminanFile = $request->file('foto_jaminan');
            $filenameJaminan = $faktur . '.' . $jaminanFile->getClientOriginalExtension();
            $jaminanFile->storeAs('public/transaksi', $filenameJaminan);

            $produkHarga = ProdukHarga::find($request->layanan);
            $tgl_pinjam = Carbon::parse($request->tgl_pinjam);
            Transaksi::create([
                'faktur' => $faktur,
                'pelanggan_id' => $pelanggan->id,
                'jaminan' => $request->jaminan,
                'foto_jaminan' => $filenameJaminan,
                'tgl_pinjam' => $tgl_pinjam->format('Y-m-d'),
                'tgl_kembali' => $tgl_pinjam->addDays($request->lama_pinjam)->format('Y-m-d'),
                'harga' => $produkHarga->harga,
                'denda' => 0,
                'tgl_dikembalikan' => '',
                'produk_id' => $request->produk_id,
                'user_id' => auth()->user()->id,
                'status' => 0
            ]);
            DB::commit();
            return redirect()->back()->with(['success' => '#' . $faktur . ' Berhasil ditambahkan']);
        } catch (\Exception $e) {
            DB::rollback();
            return $e->getMessage();
        }
    }
}