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require 'gitlab/markdown'
module Gitlab
module Markdown
# 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 call
replace_text_nodes_matching(Label.reference_pattern) do |content|
label_link_filter(content)
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)
project = context[:project]
self.class.references_in(text) do |match, id, name|
params = label_params(id, name)
if label = project.labels.find_by(params)
push_result(:label, label)
url = url_for_label(project, label)
klass = reference_class(:label)
data = data_attribute(project.id)
%(<a href="#{url}" #{data}
class="#{klass}">#{render_colored_label(label)}</a>)
else
match
end
end
end
def url_for_label(project, label)
h = Gitlab::Application.routes.url_helpers
h.namespace_project_issues_path(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
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