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module Gitlab
module Markdown
# HTML filter that replaces user or group references with links.
#
# A special `@all` reference is also supported.
class UserReferenceFilter < ReferenceFilter
# Public: Find `@user` user references in text
#
# UserReferenceFilter.references_in(text) do |match, username|
# "<a href=...>@#{user}</a>"
# end
#
# text - String text to search.
#
# Yields the String match, and the String user name.
#
# Returns a String replaced with the return of the block.
def self.references_in(text)
text.gsub(User.reference_pattern) do |match|
yield match, $~[:user]
end
end
def call
replace_text_nodes_matching(User.reference_pattern) do |content|
user_link_filter(content)
end
end
# Replace `@user` user references in text with links to the referenced
# user's profile page.
#
# text - String text to replace references in.
#
# Returns a String with `@user` references replaced with links. All links
# have `gfm` and `gfm-project_member` class names attached for styling.
def user_link_filter(text)
self.class.references_in(text) do |match, username|
if username == 'all'
link_to_all
elsif namespace = Namespace.find_by(path: username)
link_to_namespace(namespace) || match
else
match
end
end
end
private
def urls
Gitlab::Application.routes.url_helpers
end
def link_class
reference_class(:project_member)
end
def link_to_all
project = context[:project]
# FIXME (rspeicher): Law of Demeter
push_result(:user, *project.team.members.flatten)
url = urls.namespace_project_url(project.namespace, project,
only_path: context[:only_path])
text = User.reference_prefix + 'all'
%(<a href="#{url}" class="#{link_class}">#{text}</a>)
end
def link_to_namespace(namespace)
if namespace.is_a?(Group)
link_to_group(namespace.path, namespace)
else
link_to_user(namespace.path, namespace)
end
end
def link_to_group(group, namespace)
return unless user_can_reference_group?(namespace)
push_result(:user, *namespace.users)
url = urls.group_url(group, only_path: context[:only_path])
data = data_attribute(namespace.id, :group)
text = Group.reference_prefix + group
%(<a href="#{url}" #{data} class="#{link_class}">#{text}</a>)
end
def link_to_user(user, namespace)
push_result(:user, namespace.owner)
url = urls.user_url(user, only_path: context[:only_path])
data = data_attribute(namespace.owner_id, :user)
text = User.reference_prefix + user
%(<a href="#{url}" #{data} class="#{link_class}">#{text}</a>)
end
def user_can_reference_group?(group)
Ability.abilities.allowed?(context[:current_user], :read_group, group)
end
end
end
end
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