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path: root/lib/api/labels.rb
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module API
  class Labels < Grape::API
    include PaginationParams

    before { authenticate! }

    params do
      requires :id, type: String, desc: 'The ID of a project'
    end
    resource :projects do
      desc 'Get all labels of the project' do
        success Entities::Label
      end
      params do
        use :pagination
      end
      get ':id/labels' do
        present paginate(available_labels), with: Entities::Label, current_user: current_user, project: user_project
      end

      desc 'Create a new label' do
        success Entities::Label
      end
      params do
        requires :name, type: String, desc: 'The name of the label to be created'
        requires :color, type: String, desc: "The color of the label given in 6-digit hex notation with leading '#' sign (e.g. #FFAABB)"
        optional :description, type: String, desc: 'The description of label to be created'
        optional :priority, type: Integer, desc: 'The priority of the label', allow_blank: true
      end
      post ':id/labels' do
        authorize! :admin_label, user_project

        label = available_labels.find_by(title: params[:name])
        conflict!('Label already exists') if label

        priority = params.delete(:priority)
        label = user_project.labels.create(declared_params(include_missing: false))

        if label.valid?
          label.prioritize!(user_project, priority) if priority
          present label, with: Entities::Label, current_user: current_user, project: user_project
        else
          render_validation_error!(label)
        end
      end

      desc 'Delete an existing label' do
        success Entities::Label
      end
      params do
        requires :name, type: String, desc: 'The name of the label to be deleted'
      end
      delete ':id/labels' do
        authorize! :admin_label, user_project

        label = user_project.labels.find_by(title: params[:name])
        not_found!('Label') unless label

        label.destroy
      end

      desc 'Update an existing label. At least one optional parameter is required.' do
        success Entities::Label
      end
      params do
        requires :name,  type: String, desc: 'The name of the label to be updated'
        optional :new_name, type: String, desc: 'The new name of the label'
        optional :color, type: String, desc: "The new color of the label given in 6-digit hex notation with leading '#' sign (e.g. #FFAABB)"
        optional :description, type: String, desc: 'The new description of label'
        optional :priority, type: Integer, desc: 'The priority of the label', allow_blank: true
        at_least_one_of :new_name, :color, :description, :priority
      end
      put ':id/labels' do
        authorize! :admin_label, user_project

        label = user_project.labels.find_by(title: params[:name])
        not_found!('Label not found') unless label

        update_priority = params.key?(:priority)
        priority = params.delete(:priority)
        label_params = declared_params(include_missing: false)
        # Rename new name to the actual label attribute name
        label_params[:name] = label_params.delete(:new_name) if label_params.key?(:new_name)

        render_validation_error!(label) unless label.update(label_params)

        if update_priority
          if priority.nil?
            label.unprioritize!(user_project)
          else
            label.prioritize!(user_project, priority)
          end
        end

        present label, with: Entities::Label, current_user: current_user, project: user_project
      end
    end
  end
end