1 files changed, 31 insertions, 0 deletions
diff --git a/app/services/packages/composer/composer_json_service.rb b/app/services/packages/composer/composer_json_service.rb
new file mode 100644
index 00000000000..6ffb5a77da3
--- /dev/null
+++ b/app/services/packages/composer/composer_json_service.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Packages
+  module Composer
+    class ComposerJsonService
+      def initialize(project, target)
+        @project, @target = project, target
+      end
+
+      def execute
+        composer_json
+      end
+
+      private
+
+      def composer_json
+        composer_file = @project.repository.blob_at(@target, 'composer.json')
+
+        composer_file_not_found! unless composer_file
+
+        Gitlab::Json.parse(composer_file.data)
+      rescue JSON::ParserError
+        raise 'Could not parse composer.json file. Invalid JSON.'
+      end
+
+      def composer_file_not_found!
+        raise 'The file composer.json was not found.'
+      end
+    end
+  end
+end