module LabelsHelper include ActionView::Helpers::TagHelper # Link to a Label # # label - Label object to link to # project - Project object which will be used as the context for the label's # link. If omitted, defaults to `@project`, or the label's own # project. # type - The type of item the link will point to (:issue or # :merge_request). If omitted, defaults to :issue. # block - An optional block that will be passed to `link_to`, forming the # body of the link element. If omitted, defaults to # `render_colored_label`. # # Examples: # # # Allow the generated link to use the label's own project # link_to_label(label) # # # Force the generated link to use @project # @project = Project.first # link_to_label(label) # # # Force the generated link to use a provided project # link_to_label(label, project: Project.last) # # # Force the generated link to point to merge requests instead of issues # link_to_label(label, type: :merge_request) # # # Customize link body with a block # link_to_label(label) { "My Custom Label Text" } # # Returns a String def link_to_label(label, project: nil, type: :issue, &block) project ||= @project || label.project link = send("namespace_project_#{type.to_s.pluralize}_path", project.namespace, project, label_name: label.name) if block_given? link_to link, &block else link_to render_colored_label(label), link end end def project_label_names @project.labels.pluck(:title) end def render_colored_label(label) label_color = label.color || Label::DEFAULT_COLOR text_color = text_color_for_bg(label_color) # Intentionally not using content_tag here so that this method can be called # by LabelReferenceFilter span = %(<span class="label color-label") + %( style="background-color: #{label_color}; color: #{text_color}">) + escape_once(label.name) + '</span>' span.html_safe end def suggested_colors [ '#0033CC', '#428BCA', '#44AD8E', '#A8D695', '#5CB85C', '#69D100', '#004E00', '#34495E', '#7F8C8D', '#A295D6', '#5843AD', '#8E44AD', '#FFECDB', '#AD4363', '#D10069', '#CC0033', '#FF0000', '#D9534F', '#D1D100', '#F0AD4E', '#AD8D43' ] end def text_color_for_bg(bg_color) if bg_color.length == 4 r, g, b = bg_color[1, 4].scan(/./).map { |v| (v * 2).hex } else r, g, b = bg_color[1, 7].scan(/.{2}/).map(&:hex) end if (r + g + b) > 500 '#333333' else '#FFFFFF' end end def projects_labels_options labels = if @project @project.labels else Label.where(project_id: @projects) end grouped_labels = GlobalLabel.build_collection(labels) grouped_labels.unshift(Label::None) grouped_labels.unshift(Label::Any) options_from_collection_for_select(grouped_labels, 'name', 'title', params[:label_name]) end # Required for Banzai::Filter::LabelReferenceFilter module_function :render_colored_label, :text_color_for_bg, :escape_once end