245 lines
9.5 KiB
PHP
245 lines
9.5 KiB
PHP
<?php
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namespace App\Http\Controllers;
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use App\Models\Student;
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use App\Models\PolijeMajor;
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use App\Models\Recommendation;
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use Illuminate\Http\Request;
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use Illuminate\Support\Facades\Auth;
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class RekomendasiController extends Controller
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{
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public function index()
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{
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// Ambil data siswa dari akun (kolom `nis`, `kelompok_asal` di tabel `users`)
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$user = Auth::user();
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// Jika masih ada model Student di beberapa kode lama, abaikan; gunakan properti di User
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$student = null;
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if ($user) {
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$student = (object) [
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'user_id' => $user->id,
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'nis' => $user->nis ?? null,
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'kelompok_asal' => $user->kelompok_asal ?? null,
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'foto' => $user->foto ?? null,
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];
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}
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return view('rekomendasi.input', compact('student'));
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}
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public function proses(Request $request)
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{
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// --- 1. PREPROCESSING NILAI (Kriteria 1: Akademik) ---
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$scores = $request->only(['mtk', 'fisika', 'kimia', 'biologi', 'ekonomi', 'geografi', 'sosiologi', 'sejarah']);
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$validScores = array_filter($scores);
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$average = count($validScores) > 0 ? array_sum($validScores) / count($validScores) : 0;
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// Kategorisasi Nilai berdasarkan config
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$nilaiCategories = config('polije.nilai_category', []);
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$katNilai = 'Rendah';
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foreach ($nilaiCategories as $category => $range) {
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if ($average >= $range['min'] && $average <= $range['max']) {
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$katNilai = $category;
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break;
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}
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}
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// --- 2. ANALISIS MINAT (Kriteria 2) ---
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$minatRaw = strtolower($request->minat ?? '');
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$minatMapped = $this->mapMinat($minatRaw);
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// --- 3. ANALISIS CITA-CITA (Kriteria 3) ---
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$citaRaw = strtolower($request->cita_cita ?? '');
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$citaMapped = $this->mapCitaCita($citaRaw);
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// --- 4. PEMETAAN PREFERENSI STUDI (Kriteria 4) ---
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$prefStudi = $request->pref_studi ?? 'Blended';
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$prefMapping = config('polije.pref_mapping', []);
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// --- 5. ANALISIS PRESTASI (Kriteria 5) ---
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$prestasiRaw = strtolower($request->prestasi ?? '');
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$prestasiScore = $this->scorePrestasiScore($prestasiRaw);
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// --- 6. PERHITUNGAN NAIVE BAYES BERBOBOT ---
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$cfg = config('polije.criteria', []);
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$logPosteriors = [];
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$epsilon = 1e-9;
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foreach ($cfg as $jurusan => $c) {
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// Prior: uniform
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$prior = 1 / count($cfg);
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$logPrior = log(max($prior, $epsilon));
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// Weights dan match probabilities
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$weights = $c['weights'] ?? ['nilai' => 0.40, 'minat' => 0.35, 'pref' => 0.15, 'prestasi' => 0.05, 'cita_cita' => 0.05];
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$matchProb = $c['match_prob'] ?? ['nilai' => 0.80, 'minat' => 0.90, 'pref' => 0.85, 'prestasi' => 0.65, 'cita_cita' => 0.85];
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// 1. Likelihood untuk Nilai
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$p_nilai = ($katNilai == ($c['nilai'] ?? 'Sedang')) ? $matchProb['nilai'] : max(1 - $matchProb['nilai'], $epsilon);
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// 2. Likelihood untuk Minat
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$p_minat = ($minatMapped == ($c['minat'] ?? 'Umum')) ? $matchProb['minat'] : max(1 - $matchProb['minat'], $epsilon);
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// 3. Likelihood untuk Preferensi Studi
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$prefList = $c['pref'] ?? ['Praktik Langsung', 'DuDi', 'Project Based'];
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if (!is_array($prefList)) {
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$prefList = [$prefList];
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}
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$p_pref = in_array($prefStudi, $prefList) ? $matchProb['pref'] : max(1 - $matchProb['pref'], $epsilon);
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// 4. Likelihood untuk Cita-cita
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$citaCitaKeywords = $c['cita_cita_keywords'] ?? [];
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$matchCitaCita = false;
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if (!empty($citaCitaKeywords)) {
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foreach ($citaCitaKeywords as $keyword) {
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if (stripos($citaMapped, $keyword) !== false) {
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$matchCitaCita = true;
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break;
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}
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}
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}
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$p_cita_cita = $matchCitaCita ? $matchProb['cita_cita'] : max(1 - $matchProb['cita_cita'], $epsilon);
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// 5. Likelihood untuk Prestasi (boost jika ada prestasi)
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$p_prestasi = ($prestasiScore > 0.5) ? $matchProb['prestasi'] : max(1 - $matchProb['prestasi'], $epsilon);
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// Hitung log-likelihood dengan bobot
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$logLikelihood =
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($weights['nilai'] ?? 0) * log(max($p_nilai, $epsilon)) +
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($weights['minat'] ?? 0) * log(max($p_minat, $epsilon)) +
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($weights['pref'] ?? 0) * log(max($p_pref, $epsilon)) +
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($weights['cita_cita'] ?? 0) * log(max($p_cita_cita, $epsilon)) +
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($weights['prestasi'] ?? 0) * log(max($p_prestasi, $epsilon));
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$logPosteriors[$jurusan] = $logPrior + $logLikelihood;
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}
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// Convert log-posteriors ke probabilitas (softmax)
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$maxLog = max($logPosteriors);
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$expVals = [];
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$sumExp = 0.0;
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foreach ($logPosteriors as $jurusan => $lv) {
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$expVals[$jurusan] = exp($lv - $maxLog);
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$sumExp += $expVals[$jurusan];
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}
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$hasilAkhir = [];
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foreach ($expVals as $jurusan => $val) {
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$prob = $val / max($sumExp, $epsilon);
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$hasilAkhir[] = [
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'jurusan' => $jurusan,
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'skor' => round($prob, 4),
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'kecocokan_nilai' => $katNilai,
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'kecocokan_minat' => $minatMapped,
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'kecocokan_pref' => $prefStudi,
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];
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}
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// Sort hasil berdasarkan skor (tertinggi dulu)
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usort($hasilAkhir, fn($a, $b) => $b['skor'] <=> $a['skor']);
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// Simpan data rekomendasi ke database
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$user = Auth::user();
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if ($user) {
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Recommendation::create([
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'user_id' => $user->id,
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'mtk' => $request->mtk ?? null,
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'fisika' => $request->fisika ?? null,
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'kimia' => $request->kimia ?? null,
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'biologi' => $request->biologi ?? null,
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'ekonomi' => $request->ekonomi ?? null,
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'geografi' => $request->geografi ?? null,
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'sosiologi' => $request->sosiologi ?? null,
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'sejarah' => $request->sejarah ?? null,
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'minat' => $request->minat ?? null,
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'preferensi_studi' => $request->pref_studi ?? null,
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'cita_cita' => $request->cita_cita ?? null,
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'prestasi' => $request->prestasi ?? null,
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'hasil_rekomendasi' => $hasilAkhir,
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]);
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}
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// Simpan data rekomendasi ke session untuk chatbot
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if (count($hasilAkhir) > 0) {
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$topResult = $hasilAkhir[0];
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session([
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'recomendation_data' => [
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'jurusan' => $topResult['jurusan'],
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'skor' => $topResult['skor'],
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'nilai' => $katNilai,
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'minat' => $minatMapped,
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'pref_studi' => $prefStudi,
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]
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]);
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}
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return view('rekomendasi.hasil', compact('hasilAkhir', 'katNilai', 'minatMapped', 'citaMapped', 'prefStudi', 'prestasiScore'));
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}
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/**
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* Pemetaan minat ke kategori yang dipahami sistem
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*/
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private function mapMinat(string $minatRaw): string
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{
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if (preg_match('/(coding|komputer|laptop|web|aplikasi|logika|programming|software|development)/', $minatRaw)) {
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return 'Logika & Komputer';
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} elseif (preg_match('/(tanam|kebun|sawah|hewan|ternak|alam|pertanian|agri)/', $minatRaw)) {
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return 'Alam & Tanaman';
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} elseif (preg_match('/(obat|sakit|rawat|medis|gizi|sehat|kesehatan|perawat|dokter)/', $minatRaw)) {
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return 'Pelayanan & Kesehatan';
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} elseif (preg_match('/(bisnis|uang|jual|kantor|hitung|ekonomi|dagang|usaha|entrepreneur)/', $minatRaw)) {
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return 'Manajemen & Bisnis';
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} elseif (preg_match('/(mesin|bengkel|listrik|las|robot|motor|teknik|otomasi|elektronik)/', $minatRaw)) {
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return 'Mesin & Listrik';
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}
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return 'Umum';
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}
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/**
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* Pemetaan cita-cita ke kategori jurusan
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*/
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private function mapCitaCita(string $citaRaw): string
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{
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// Return raw mapped text untuk matching dengan keywords
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return $citaRaw;
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}
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/**
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* Scoring prestasi berdasarkan keyword
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*/
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private function scorePrestasiScore(string $prestasiRaw): float
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{
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if (empty($prestasiRaw)) {
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return 0.0;
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}
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$prestasiScore = 0.0;
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// Berbagai tingkat prestasi
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if (preg_match('/(juara|menang|champion|first|gold|emas|terbaik)/', $prestasiRaw)) {
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$prestasiScore = 0.90; // Prestasi tinggi
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} elseif (preg_match('/(finalis|semifinal|peringkat|ranking|podium|medali|silver|silver|perak)/', $prestasiRaw)) {
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$prestasiScore = 0.75; // Prestasi sedang
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} elseif (preg_match('/(sertifikat|training|kursus|workshop|peserta|mengikuti)/', $prestasiRaw)) {
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$prestasiScore = 0.60; // Prestasi cukup
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} else {
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$prestasiScore = 0.30; // Prestasi minimal
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}
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return $prestasiScore;
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}
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/**
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* Tampilkan history rekomendasi
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*/
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public function historyRekomendasi()
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{
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$user = Auth::user();
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$recommendations = Recommendation::where('user_id', $user->id)
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->orderBy('created_at', 'desc')
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->get();
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return view('history.rekomendasi', compact('recommendations'));
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}
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} |