1 files changed, 56 insertions, 0 deletions
diff --git a/lib/gitlab/hook_data/issuable_builder.rb b/lib/gitlab/hook_data/issuable_builder.rb
new file mode 100644
index 00000000000..4febb0ab430
--- /dev/null
+++ b/lib/gitlab/hook_data/issuable_builder.rb
@@ -0,0 +1,56 @@
+module Gitlab
+  module HookData
+    class IssuableBuilder
+      CHANGES_KEYS = %i[previous current].freeze
+
+      attr_accessor :issuable
+
+      def initialize(issuable)
+        @issuable = issuable
+      end
+
+      def build(user: nil, changes: {})
+        hook_data = {
+          object_kind: issuable.class.name.underscore,
+          user: user.hook_attrs,
+          project: issuable.project.hook_attrs,
+          object_attributes: issuable.hook_attrs,
+          labels: issuable.labels.map(&:hook_attrs),
+          changes: final_changes(changes.slice(*safe_keys)),
+          # DEPRECATED
+          repository: issuable.project.hook_attrs.slice(:name, :url, :description, :homepage)
+        }
+
+        if issuable.is_a?(Issue)
+          hook_data[:assignees] = issuable.assignees.map(&:hook_attrs) if issuable.assignees.any?
+        else
+          hook_data[:assignee] = issuable.assignee.hook_attrs if issuable.assignee
+        end
+
+        hook_data
+      end
+
+      def safe_keys
+        issuable_builder::SAFE_HOOK_ATTRIBUTES + issuable_builder::SAFE_HOOK_RELATIONS
+      end
+
+      private
+
+      def issuable_builder
+        case issuable
+        when Issue
+          Gitlab::HookData::IssueBuilder
+        when MergeRequest
+          Gitlab::HookData::MergeRequestBuilder
+        end
+      end
+
+      def final_changes(changes_hash)
+        changes_hash.reduce({}) do |hash, (key, changes_array)|
+          hash[key] = Hash[CHANGES_KEYS.zip(changes_array)]
+          hash
+        end
+      end
+    end
+  end
+end