1 files changed, 79 insertions, 0 deletions
diff --git a/lib/api/topics.rb b/lib/api/topics.rb
new file mode 100644
index 00000000000..bd28ebe58a9
--- /dev/null
+++ b/lib/api/topics.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+module API
+  class Topics < ::API::Base
+    include PaginationParams
+
+    feature_category :projects
+
+    desc 'Get topics' do
+      detail 'This feature was introduced in GitLab 14.5.'
+      success Entities::Projects::Topic
+    end
+    params do
+      optional :search, type: String, desc: 'Return list of topics matching the search criteria'
+      use :pagination
+    end
+    get 'topics' do
+      topics = ::Projects::TopicsFinder.new(params: declared_params(include_missing: false)).execute
+
+      present paginate(topics), with: Entities::Projects::Topic
+    end
+
+    desc 'Get topic' do
+      detail 'This feature was introduced in GitLab 14.5.'
+      success Entities::Projects::Topic
+    end
+    params do
+      requires :id, type: Integer, desc: 'ID of project topic'
+    end
+    get 'topics/:id' do
+      topic = ::Projects::Topic.find(params[:id])
+
+      present topic, with: Entities::Projects::Topic
+    end
+
+    desc 'Create a topic' do
+      detail 'This feature was introduced in GitLab 14.5.'
+      success Entities::Projects::Topic
+    end
+    params do
+      requires :name, type: String, desc: 'Name'
+      optional :description, type: String, desc: 'Description'
+      optional :avatar, type: ::API::Validations::Types::WorkhorseFile, desc: 'Avatar image for topic'
+    end
+    post 'topics' do
+      authenticated_as_admin!
+
+      topic = ::Projects::Topic.new(declared_params(include_missing: false))
+
+      if topic.save
+        present topic, with: Entities::Projects::Topic
+      else
+        render_validation_error!(topic)
+      end
+    end
+
+    desc 'Update a topic' do
+      detail 'This feature was introduced in GitLab 14.5.'
+      success Entities::Projects::Topic
+    end
+    params do
+      requires :id, type: Integer, desc: 'ID of project topic'
+      optional :name, type: String, desc: 'Name'
+      optional :description, type: String, desc: 'Description'
+      optional :avatar, type: ::API::Validations::Types::WorkhorseFile, desc: 'Avatar image for topic'
+    end
+    put 'topics/:id' do
+      authenticated_as_admin!
+
+      topic = ::Projects::Topic.find(params[:id])
+
+      if topic.update(declared_params(include_missing: false))
+        present topic, with: Entities::Projects::Topic
+      else
+        render_validation_error!(topic)
+      end
+    end
+  end
+end