Handle double filenames

lib/active_storage/send_zip.rb

@@ -2,6 +2,7 @@
 require 'rails'
 require 'zip'
 require 'tempfile'
+require 'pathname'
 
 module ActiveStorage
   module SendZip
@@ -31,15 +32,31 @@ def save_files_on_server(files)
       require 'zip'
       # get a temporary folder and create it
       temp_folder = Dir.mktmpdir 'active_storage-send_zip'
-      # FileUtils.mkdir_p(temp_folder) unless Dir.exist?(temp_folder)
+
+      # count each files to avoid duplicates
+      filepaths = []
 
       # download all ActiveStorage into
-      files.map do |picture|
+      files.each do |picture|
         filename = picture.filename.to_s
         filepath = File.join temp_folder, filename
+
+        # ensure that filename not exists
+        if filepaths.include? filepath
+          # create a new random filenames
+          basename = File.basename filename
+          extension = File.extname filename
+
+          filename = "#{basename}_#{SecureRandom.uuid}#{extension}"
+          filepath = File.join temp_folder, filename
+        end
+
         File.open(filepath, 'wb') { |f| f.write(picture.download) }
-        filepath
+
+        filepaths << filepath
       end
+
+      filepaths
     end
 
     # Create a temporary zip file & return the content as bytes

test/active_storage/send_zip_test.rb

@@ -43,14 +43,14 @@ def test_it_should_save_two_active_support
     assert_produce_files files, count: 2
   end
 
-  # def test_it_should_save_two_active_support
-  #   files = [
-  #     ActiveStorageMock.new('foo.txt'),
-  #     ActiveStorageMock.new('foo.txt')
-  #   ]
-  #
-  #   assert_produce_files files, count: 2
-  # end
+  def test_it_should_save_two_active_support
+    files = [
+      ActiveStorageMock.new('foo.txt'),
+      ActiveStorageMock.new('foo.txt')
+    ]
+
+    assert_produce_files files, count: 2
+  end
 
   private