1 files changed, 28 insertions, 0 deletions
diff --git a/modules/gallery/helpers/system.php b/modules/gallery/helpers/system.php
index c39c7227..9815d588 100644
--- a/modules/gallery/helpers/system.php
+++ b/modules/gallery/helpers/system.php
@@ -40,4 +40,32 @@ class system_Core {
     }
     return null;
   }
+
+  /**
+   * Create a file with a unique file name.
+   * This helper is similar to the built-in tempnam.
+   * It allows the caller to specify a prefix and an extension.
+   * It always places the file in TMPPATH.
+   */
+  static function temp_filename($prefix = "", $extension = "") {
+    return self::_tempnam(TMPPATH, $prefix, ".$extension", "tempnam");
+  }
+
+  /**
+   * This helper provides a dependency-injected implementation of tempnam.
+   */
+  static function _tempnam($dir, $prefix, $postfix, $builtin) {
+    do {
+      $basename = call_user_func($builtin, $dir, $prefix);
+      if (!$basename) {
+        return false;
+      }
+      $filename = $basename . $postfix;
+      $success = !file_exists($filename) && @rename($basename, $filename);
+      if (!$success) {
+        @unlink($basename);
+      }
+    } while (!$success);
+    return $filename;
+  }
 }
 \ No newline at end of file