Show logs through the web interface

Lib/Logger.php

@@ -87,4 +87,38 @@ class Logger {
     public static function data() {
         return self::$data;
     }
-}
+
+    public static function getLastLogs($offset = null) {
+        $file = Configuration::get('log.file');
+        if(! file_exists($file)) {
+            return 'No log yet !';
+        }
+
+        $f = fopen($file, 'r');
+
+        $len = 1024;
+
+        fseek($f, 0, SEEK_END);
+        $size = ftell($f);
+        if(is_null($offset) || $offset > $size) {
+            $offset = $size - $len;
+        }
+        $offset = max(0, $offset);
+
+        fseek($f, $offset);
+
+        // remove the first line that may be incomplete
+        $buffer = fread($f, $len);
+        $buffer = explode("\n", $buffer);
+        array_shift($buffer);
+        $buffer = implode("\n", $buffer);
+        // continue reading until the end of the file
+        while(! feof($f)) {
+            $buffer .= fread($f, $len);
+        }
+
+        fclose($f);
+
+        return $buffer;
+    }
+}