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module Banzai
module Filter
# HTML filter that replaces external issue tracker references with links.
# References are ignored if the project doesn't use an external issue
# tracker.
#
# This filter does not support cross-project references.
class ExternalIssueReferenceFilter < ReferenceFilter
self.reference_type = :external_issue
# Public: Find `JIRA-123` issue references in text
#
# ExternalIssueReferenceFilter.references_in(text, pattern) do |match, issue|
# "<a href=...>##{issue}</a>"
# end
#
# text - String text to search.
#
# Yields the String match and the String issue reference.
#
# Returns a String replaced with the return of the block.
def self.references_in(text, pattern)
text.gsub(pattern) do |match|
yield match, $~[:issue]
end
end
def call
# Early return if the project isn't using an external tracker
return doc if project.nil? || default_issues_tracker?
ref_pattern = issue_reference_pattern
ref_start_pattern = /\A#{ref_pattern}\z/
each_node do |node|
if text_node?(node)
replace_text_when_pattern_matches(node, ref_pattern) do |content|
issue_link_filter(content)
end
elsif element_node?(node)
yield_valid_link(node) do |link, inner_html|
if link =~ ref_start_pattern
replace_link_node_with_href(node, link) do
issue_link_filter(link, link_content: inner_html)
end
end
end
end
end
doc
end
# Replace `JIRA-123` issue references in text with links to the referenced
# issue's details page.
#
# text - String text to replace references in.
# link_content - Original content of the link being replaced.
#
# Returns a String with `JIRA-123` references replaced with links. All
# links have `gfm` and `gfm-issue` class names attached for styling.
def issue_link_filter(text, link_content: nil)
project = context[:project]
self.class.references_in(text, issue_reference_pattern) do |match, id|
ExternalIssue.new(id, project)
url = url_for_issue(id, project, only_path: context[:only_path])
title = "Issue in #{project.external_issue_tracker.title}"
klass = reference_class(:issue)
data = data_attribute(project: project.id, external_issue: id)
content = link_content || match
%(<a href="#{url}" #{data}
title="#{escape_once(title)}"
class="#{klass}">#{content}</a>)
end
end
def url_for_issue(*args)
IssuesHelper.url_for_issue(*args)
end
def default_issues_tracker?
external_issues_cached(:default_issues_tracker?)
end
def issue_reference_pattern
external_issues_cached(:external_issue_reference_pattern)
end
private
def external_issues_cached(attribute)
return project.public_send(attribute) unless RequestStore.active?
cached_attributes = RequestStore[:banzai_external_issues_tracker_attributes] ||= Hash.new { |h, k| h[k] = {} }
cached_attributes[project.id][attribute] = project.public_send(attribute) if cached_attributes[project.id][attribute].nil?
cached_attributes[project.id][attribute]
end
end
end
end
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