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Diffstat (limited to 'lib/banzai/filter/label_reference_filter.rb')
-rw-r--r-- | lib/banzai/filter/label_reference_filter.rb | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/lib/banzai/filter/label_reference_filter.rb b/lib/banzai/filter/label_reference_filter.rb new file mode 100644 index 00000000000..07bac2dd7fd --- /dev/null +++ b/lib/banzai/filter/label_reference_filter.rb @@ -0,0 +1,96 @@ +require 'banzai' + +module Banzai + module Filter + # HTML filter that replaces label references with links. + class LabelReferenceFilter < ReferenceFilter + # Public: Find label references in text + # + # LabelReferenceFilter.references_in(text) do |match, id, name| + # "<a href=...>#{Label.find(id)}</a>" + # end + # + # text - String text to search. + # + # Yields the String match, an optional Integer label ID, and an optional + # String label name. + # + # Returns a String replaced with the return of the block. + def self.references_in(text) + text.gsub(Label.reference_pattern) do |match| + yield match, $~[:label_id].to_i, $~[:label_name] + end + end + + def self.referenced_by(node) + { label: LazyReference.new(Label, node.attr("data-label")) } + end + + def call + replace_text_nodes_matching(Label.reference_pattern) do |content| + label_link_filter(content) + end + + replace_link_nodes_with_href(Label.reference_pattern) do |link, text| + label_link_filter(link, link_text: text) + end + end + + # Replace label references in text with links to the label specified. + # + # text - String text to replace references in. + # + # Returns a String with label references replaced with links. All links + # have `gfm` and `gfm-label` class names attached for styling. + def label_link_filter(text, link_text: nil) + project = context[:project] + + self.class.references_in(text) do |match, id, name| + params = label_params(id, name) + + if label = project.labels.find_by(params) + url = url_for_label(project, label) + klass = reference_class(:label) + data = data_attribute( + original: link_text || match, + project: project.id, + label: label.id + ) + + text = link_text || render_colored_label(label) + + %(<a href="#{url}" #{data} + class="#{klass}">#{text}</a>) + else + match + end + end + end + + def url_for_label(project, label) + h = Gitlab::Application.routes.url_helpers + h.namespace_project_issues_url( project.namespace, project, label_name: label.name, + only_path: context[:only_path]) + end + + def render_colored_label(label) + LabelsHelper.render_colored_label(label) + end + + # Parameters to pass to `Label.find_by` based on the given arguments + # + # id - Integer ID to pass. If present, returns {id: id} + # name - String name to pass. If `id` is absent, finds by name without + # surrounding quotes. + # + # Returns a Hash. + def label_params(id, name) + if name + { name: name.tr('"', '') } + else + { id: id } + end + end + end + end +end |