1 files changed, 41 insertions, 0 deletions
diff --git a/app/uploaders/file_uploader.rb b/app/uploaders/file_uploader.rb
new file mode 100644
index 00000000000..cbc9271ac14
--- /dev/null
+++ b/app/uploaders/file_uploader.rb
@@ -0,0 +1,41 @@
+# encoding: utf-8
+class FileUploader < CarrierWave::Uploader::Base
+  storage :file
+
+  def initialize(base_dir, path = '', allowed_extensions = nil)
+    @base_dir = base_dir
+    @path = path
+    @allowed_extensions = allowed_extensions
+  end
+
+  def base_dir
+    @base_dir
+  end
+
+  def store_dir
+    File.join(@base_dir, @path)
+  end
+
+  def cache_dir
+    File.join(@base_dir, 'tmp', @path)
+  end
+
+  def extension_white_list
+    @allowed_extensions
+  end
+
+  def store!(file)
+    file.original_filename = self.class.generate_filename(file)
+    super
+  end
+
+  def self.generate_filename(file)
+    original_filename = File.basename(file.original_filename, '.*')
+    extension = File.extname(file.original_filename)
+    new_filename = Digest::MD5.hexdigest(original_filename) + extension
+  end
+
+  def self.generate_dir
+    SecureRandom.hex(5)
+  end
+end