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require 'gitlab/markdown'
module Gitlab
module Markdown
# HTML filter that replaces snippet references with links. References to
# snippets that do not exist are ignored.
#
# This filter supports cross-project references.
class SnippetReferenceFilter < ReferenceFilter
include CrossProjectReference
# Public: Find `$123` snippet references in text
#
# SnippetReferenceFilter.references_in(text) do |match, snippet|
# "<a href=...>$#{snippet}</a>"
# end
#
# text - String text to search.
#
# Yields the String match, the Integer snippet 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(Snippet.reference_pattern) do |match|
yield match, $~[:snippet].to_i, $~[:project]
end
end
def call
replace_text_nodes_matching(Snippet.reference_pattern) do |content|
snippet_link_filter(content)
end
end
# Replace `$123` snippet references in text with links to the referenced
# snippets'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-snippet` class names attached for styling.
def snippet_link_filter(text)
self.class.references_in(text) do |match, id, project_ref|
project = self.project_from_ref(project_ref)
if project && snippet = project.snippets.find_by(id: id)
push_result(:snippet, snippet)
title = escape_once("Snippet: #{snippet.title}")
klass = reference_class(:snippet)
data = data_attribute(project.id)
url = url_for_snippet(snippet, project)
%(<a href="#{url}" #{data}
title="#{title}"
class="#{klass}">#{match}</a>)
else
match
end
end
end
def url_for_snippet(snippet, project)
h = Rails.application.routes.url_helpers
h.namespace_project_snippet_url(project.namespace, project, snippet,
only_path: context[:only_path])
end
end
end
end
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