Initial commit untuk UAS SIG

backend/login.php

@@ -0,0 +1,41 @@
+<?php
+session_start();
+header('Content-Type: application/json');
+
+require 'koneksi.php';
+$c = getConnection();
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    echo json_encode(['status' => 'error', 'message' => 'Invalid request method']);
+    exit;
+}
+
+$input = json_decode(file_get_contents('php://input'), true);
+if (!$input && isset($_POST['username'])) {
+    $input = $_POST;
+}
+
+$username = $input['username'] ?? '';
+$password = $input['password'] ?? '';
+
+if (empty($username) || empty($password)) {
+    echo json_encode(['status' => 'error', 'message' => 'Username and password required']);
+    exit;
+}
+
+$stmt = $c->prepare("SELECT id, username, password FROM users WHERE username = ?");
+$stmt->bind_param("s", $username);
+$stmt->execute();
+$result = $stmt->get_result();
+
+if ($row = $result->fetch_assoc()) {
+    if (password_verify($password, $row['password'])) {
+        // Success
+        $_SESSION['user_id'] = $row['id'];
+        $_SESSION['username'] = $row['username'];
+        echo json_encode(['status' => 'success', 'message' => 'Login successful']);
+        exit;
+    }
+}
+
+echo json_encode(['status' => 'error', 'message' => 'Invalid username or password']);