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require 'gitlab/markdown'
module Gitlab
module Markdown
# HTML filter that replaces merge request references with links. References
# to merge requests that do not exist are ignored.
#
# This filter supports cross-project references.
class MergeRequestReferenceFilter < ReferenceFilter
include CrossProjectReference
# Public: Find `!123` merge request references in text
#
# MergeRequestReferenceFilter.references_in(text) do |match, merge_request, project_ref|
# "<a href=...>##{merge_request}</a>"
# end
#
# text - String text to search.
#
# Yields the String match, the Integer merge request ID, and an optional
# String of the external project reference.
#
# Returns a String replaced with the return of the block.
def self.references_in(text)
text.gsub(MergeRequest.reference_pattern) do |match|
yield match, $~[:merge_request].to_i, $~[:project]
end
end
def self.referenced_by(node)
{ merge_request: LazyReference.new(MergeRequest, node.attr("data-merge-request")) }
end
def call
replace_text_nodes_matching(MergeRequest.reference_pattern) do |content|
merge_request_link_filter(content)
end
end
# Replace `!123` merge request references in text with links to the
# referenced merge request's details page.
#
# text - String text to replace references in.
#
# Returns a String with `!123` references replaced with links. All links
# have `gfm` and `gfm-merge_request` class names attached for styling.
def merge_request_link_filter(text)
self.class.references_in(text) do |match, id, project_ref|
project = self.project_from_ref(project_ref)
if project && merge_request = project.merge_requests.find_by(iid: id)
title = escape_once("Merge Request: #{merge_request.title}")
klass = reference_class(:merge_request)
data = data_attribute(project: project.id, merge_request: merge_request.id)
url = url_for_merge_request(merge_request, project)
%(<a href="#{url}" #{data}
title="#{title}"
class="#{klass}">#{match}</a>)
else
match
end
end
end
def url_for_merge_request(mr, project)
h = Gitlab::Application.routes.url_helpers
h.namespace_project_merge_request_url(project.namespace, project, mr,
only_path: context[:only_path])
end
end
end
end
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