Merge branch 'api-subscribe-issue-mr' into 'master'

API: Subscribe and unsubscribe from issues and merge requests

* Closes #6024 

This MR is based on !3611, which must be merged first.


See merge request !3615

2 files changed, 72 insertions, 0 deletions

diff --git a/lib/api/issues.rb b/lib/api/issues.rb
index 850e99981ff..4cdecadfe0f 100644
--- a/lib/api/issues.rb
+++ b/lib/api/issues.rb
@@ -231,6 +231,42 @@ module API
         authorize!(:destroy_issue, issue)
         issue.destroy
       end
+
+      # Subscribes to a project issue
+      #
+      # Parameters:
+      #  id (required)       - The ID of a project
+      #  issue_id (required) - The ID of a project issue
+      # Example Request:
+      #   POST /projects/:id/issues/:issue_id/subscription
+      post ':id/issues/:issue_id/subscription' do
+        issue = user_project.issues.find(params[:issue_id])
+
+        if issue.subscribed?(current_user)
+          not_modified!
+        else
+          issue.toggle_subscription(current_user)
+          present issue, with: Entities::Issue, current_user: current_user
+        end
+      end
+
+      # Unsubscribes from a project issue
+      #
+      # Parameters:
+      #  id (required)       - The ID of a project
+      #  issue_id (required) - The ID of a project issue
+      # Example Request:
+      #   DELETE /projects/:id/issues/:issue_id/subscription
+      delete ':id/issues/:issue_id/subscription' do
+        issue = user_project.issues.find(params[:issue_id])
+
+        if issue.subscribed?(current_user)
+          issue.unsubscribe(current_user)
+          present issue, with: Entities::Issue, current_user: current_user
+        else
+          not_modified!
+        end
+      end
     end
   end
 end
diff --git a/lib/api/merge_requests.rb b/lib/api/merge_requests.rb
index 4e7de8867b4..7e78609ecb9 100644
--- a/lib/api/merge_requests.rb
+++ b/lib/api/merge_requests.rb
@@ -327,6 +327,42 @@ module API
           issues = ::Kaminari.paginate_array(merge_request.closes_issues(current_user))
           present paginate(issues), with: Entities::Issue, current_user: current_user
         end
+
+        # Subscribes to a merge request
+        #
+        # Parameters:
+        #  id (required)               - The ID of a project
+        #  merge_request_id (required) - The ID of a merge request
+        # Example Request:
+        #   POST /projects/:id/issues/:merge_request_id/subscription
+        post "#{path}/subscription" do
+          merge_request = user_project.merge_requests.find(params[:merge_request_id])
+
+          if merge_request.subscribed?(current_user)
+            not_modified!
+          else
+            merge_request.toggle_subscription(current_user)
+            present merge_request, with: Entities::MergeRequest, current_user: current_user
+          end
+        end
+
+        # Unsubscribes from a merge request
+        #
+        # Parameters:
+        #  id (required)               - The ID of a project
+        #  merge_request_id (required) - The ID of a merge request
+        # Example Request:
+        #   DELETE /projects/:id/merge_requests/:merge_request_id/subscription
+        delete "#{path}/subscription" do
+          merge_request = user_project.merge_requests.find(params[:merge_request_id])
+
+          if merge_request.subscribed?(current_user)
+            merge_request.unsubscribe(current_user)
+            present merge_request, with: Entities::MergeRequest, current_user: current_user
+          else
+            not_modified!
+          end
+        end
       end
     end
   end