Add SPOTA core PHP application

Add the main admin, dosen, mahasiswa, API, and service code needed to run the core legacy application with configurable upload storage.

wa-req-forwarder.php

@@ -0,0 +1,78 @@
+<?php
+
+header("Content-Type: application/json");
+
+// ================= CONFIG =================
+$apiUrl  = "http://203.24.50.140:43400/send-message";
+$apiKey  = "inf0rm4t1k4-2026-W4-G4T3W4Y";
+$sender  = "6285171655161"; // nomor sender terdaftar
+// ==========================================
+
+// Ambil input (bisa dari POST atau JSON body)
+$receiver = isset($_POST['receiver']) ? $_POST['receiver'] : null;
+$message  = isset($_POST['message']) ? $_POST['message'] : null;
+
+// Validasi nomor
+if (
+    empty($receiver) ||
+    strlen($receiver) < 10 ||
+    strlen($receiver) > 13
+) {
+    echo json_encode([
+        "success" => false,
+        "message" => "Invalid phone number"
+    ]);
+    exit;
+}
+
+// Konversi 08xxxx → 628xxxx
+if ($receiver[0] == '0') {
+    $receiver = '62' . substr($receiver, 1);
+}
+
+// Data yang dikirim ke WA Gateway
+$postData = http_build_query([
+    "sender"  => $sender,
+    "number"  => $receiver,
+    "message" => $message
+]);
+
+// Setup HTTP Context
+$options = [
+    "http" => [
+        "method"  => "POST",
+        "header"  => 
+            "Content-Type: application/x-www-form-urlencoded\r\n" .
+            "x-api-key: {$apiKey}\r\n",
+        "content" => $postData,
+        "timeout" => 30
+    ]
+];
+
+$context = stream_context_create($options);
+
+// Eksekusi request
+$result = @file_get_contents($apiUrl, false, $context);
+
+if ($result === FALSE) {
+    echo json_encode([
+        "success" => false,
+        "message" => "Gagal menghubungi server WA Gateway"
+    ]);
+    exit;
+}
+
+$response = json_decode($result, true);
+
+// Normalisasi response seperti Helper Laravel
+if (isset($response['status']) && $response['status'] == true) {
+    echo json_encode([
+        "success" => true,
+        "message" => "Pesan Berhasil Dikirim"
+    ]);
+} else {
+    echo json_encode([
+        "success" => false,
+        "message" => "Nomor Tidak Dikenali"
+    ]);
+}