lms-v2/app/Http/Controllers/Admin/SubjectController.php

<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Subject;
use Illuminate\Http\Request;

class SubjectController extends Controller
{
    public function index()
    {
        // Tarik data materi LMS
        $subjects = Subject::withCount('questions')->orderBy('name', 'asc')->paginate(20);
        
        // Tarik data SOP dari database server 11 untuk opsi Dropdown
        $sops = \Illuminate\Support\Facades\DB::connection('plantdoc')
            ->table('tblDocuments')
            ->select('name as nomor', 'comment as judul')
            ->orderBy('name', 'asc')
            ->get();

        // Pastikan $sops dikirim ke view
        return view('pages.admin.subjects.index', compact('subjects', 'sops'));
    }

    public function store(Request $request)
    {
        $request->validate([
            'name' => 'required|string|max:255|unique:subjects,name',
        ]);

        Subject::create(['name' => $request->name]);
        return redirect()->route('admin.subjects.index')->with('success', 'Materi baru berhasil ditambahkan.');
    }

    public function update(Request $request, $id)
    {
        $request->validate([
            'name' => 'required|string|max:255|unique:subjects,name,' . $id,
        ]);

        $subject = Subject::findOrFail($id);
        $subject->update(['name' => $request->name]);
        
        return redirect()->route('admin.subjects.index')->with('success', 'Nama materi berhasil diperbarui.');
    }

    public function show($id)
    {
        // Tarik data materi beserta soal-soalnya secara menurun (terbaru di atas)
        $subject = \App\Models\Subject::with(['questions' => function($query) {
            $query->latest();
        }])->withCount('questions')->findOrFail($id);

        return view('pages.admin.subjects.show', compact('subject'));
    }

    public function edit($id)
    {
        $subject = Subject::findOrFail($id);
        return view('pages.admin.subjects.edit', compact('subject'));
    }

    public function destroy($id)
    {
        $subject = Subject::findOrFail($id);
        
        // Cek apakah materi ini sudah dipakai di bank soal
        if ($subject->questions()->count() > 0) {
            return redirect()->route('admin.subjects.index')->with('error', 'Gagal menghapus! Materi ini sedang digunakan pada Bank Soal.');
        }

        $subject->delete();
        return redirect()->route('admin.subjects.index')->with('success', 'Materi berhasil dihapus.');
    }
}