FEATURE: admin/user exports are compressed using the zip format (#7784)

* FEATURE: admin/user exports are compressed using the zip format

* Update translations. Theme exporter now exports .zip file. Theme importer supports .zip and .gz files

* Fix controller test, updated locale and skip saving the csv export to disk

lib/theme_store/tgz_exporter.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'zip'
+
 module ThemeStore; end
 
 class ThemeStore::TgzExporter
@@ -58,11 +60,19 @@ class ThemeStore::TgzExporter
   private
   def export_package
     export_to_folder
+
     Dir.chdir(@temp_folder) do
       tar_filename = "#{@export_name}.tar"
       Discourse::Utils.execute_command('tar', '--create', '--file', tar_filename, @export_name, failure_message: "Failed to tar theme.")
-      Discourse::Utils.execute_command('gzip', '-5', tar_filename, failure_message: "Failed to gzip archive.")
-      "#{@temp_folder}/#{tar_filename}.gz"
+
+      zip_filename = "#{tar_filename}.zip"
+      absolute_path = "#{@temp_folder}/#{tar_filename}"
+      Zip::File.open(zip_filename, Zip::File::CREATE) do |zipfile|
+        zipfile.add(tar_filename, absolute_path)
+        zipfile.close
+      end
+
+      "#{absolute_path}.zip"
     end
   end
 

lib/theme_store/tgz_importer.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'zip'
+
 module ThemeStore; end
 
 class ThemeStore::TgzImporter
@@ -13,8 +15,21 @@ class ThemeStore::TgzImporter
 
   def import!
     FileUtils.mkdir(@temp_folder)
-    Dir.chdir(@temp_folder) do
-      Discourse::Utils.execute_command("tar", "-xzvf", @filename, "--strip", "1")
+
+    if @filename.include?('.zip')
+      name = @filename.split('/').last.gsub('.zip', '')
+
+      Dir.chdir(@temp_folder) do
+        Zip::File.open(@filename) do |zip_file|
+          zip_file.each { |entry| entry.extract(name) }
+        end
+
+        Discourse::Utils.execute_command("tar", "-xvf", name, "--strip", "1")
+      end
+    else
+      Dir.chdir(@temp_folder) do
+        Discourse::Utils.execute_command("tar", "-xzvf", @filename, "--strip", "1")
+      end
     end
   rescue RuntimeError
     raise RemoteTheme::ImportError, I18n.t("themes.import_error.unpack_failed")