Update -> add new log and analytices users

app/core/db.php

@@ -1,4 +1,6 @@
 <?php
+require_once __DIR__ . '/logger.php';
+
 $config = require __DIR__ . '/../config/config.php';
 
 try {
@@ -14,6 +16,7 @@ try {
         PDO::ATTR_EMULATE_PREPARES   => false,
     ]);
 } catch (PDOException $e) {
+    (new Logger('db'))->error('Database connection failed', ['error' => $e->getMessage()]);
     http_response_code(503);
     die(json_encode(['success' => false, 'message' => 'Database connection error.']));
 }

app/core/logger.php

@@ -0,0 +1,76 @@
+<?php
+
+class Logger
+{
+    const INFO    = 'INFO';
+    const WARNING = 'WARNING';
+    const ERROR   = 'ERROR';
+
+    private string $logDir;
+    private string $context;
+
+    public function __construct(string $context = 'app')
+    {
+        $this->logDir  = __DIR__ . '/../../storage/logs';
+        $this->context = $context;
+
+        if (!is_dir($this->logDir)) {
+            mkdir($this->logDir, 0755, true);
+        }
+    }
+
+    public function info(string $message, array $extra = []): void
+    {
+        $this->write(self::INFO, $message, $extra);
+    }
+
+    public function warning(string $message, array $extra = []): void
+    {
+        $this->write(self::WARNING, $message, $extra);
+    }
+
+    public function error(string $message, array $extra = []): void
+    {
+        $this->write(self::ERROR, $message, $extra);
+    }
+
+    private function write(string $level, string $message, array $extra = []): void
+    {
+        $date     = date('Y-m-d');
+        $file     = "{$this->logDir}/{$date}.log";
+        $time     = date('Y-m-d H:i:s');
+        $ip       = $this->getClientIp();
+        $extraStr = empty($extra) ? '' : ' ' . json_encode($extra, JSON_UNESCAPED_UNICODE);
+
+        $line = "[{$time}] [{$level}] [{$this->context}] [{$ip}] {$message}{$extraStr}" . PHP_EOL;
+
+        file_put_contents($file, $line, FILE_APPEND | LOCK_EX);
+    }
+
+    private function getClientIp(): string
+    {
+        foreach (['HTTP_X_FORWARDED_FOR', 'HTTP_X_REAL_IP', 'REMOTE_ADDR'] as $key) {
+            if (!empty($_SERVER[$key])) {
+                $ip = trim(explode(',', $_SERVER[$key])[0]);
+                if (filter_var($ip, FILTER_VALIDATE_IP)) {
+                    return $ip;
+                }
+            }
+        }
+        return 'unknown';
+    }
+
+    public static function cleanOldLogs(int $keepDays = 30): void
+    {
+        $logDir = __DIR__ . '/../../storage/logs';
+        if (!is_dir($logDir)) {
+            return;
+        }
+
+        foreach (glob("{$logDir}/*.log") as $file) {
+            if (filemtime($file) < time() - ($keepDays * 86400)) {
+                unlink($file);
+            }
+        }
+    }
+}