gitlab-org--gitlab-foss/lib/gitlab/gfm/uploads_rewriter.rb
2018-07-03 09:57:15 -07:00

52 lines
1.3 KiB
Ruby

require 'fileutils'
module Gitlab
module Gfm
##
# Class that rewrites markdown links for uploads
#
# Using a pattern defined in `FileUploader` it copies files to a new
# project and rewrites all links to uploads in in a given text.
#
#
class UploadsRewriter
def initialize(text, source_project, _current_user)
@text = text
@source_project = source_project
@pattern = FileUploader::MARKDOWN_PATTERN
end
def rewrite(target_project)
return @text unless needs_rewrite?
@text.gsub(@pattern) do |markdown|
file = find_file(@source_project, $~[:secret], $~[:file])
break markdown unless file.try(:exists?)
moved = FileUploader.copy_to(file, target_project)
moved.markdown_link
end
end
def needs_rewrite?
files.any?
end
def files
referenced_files = @text.scan(@pattern).map do
find_file(@source_project, $~[:secret], $~[:file])
end
referenced_files.compact.select(&:exists?)
end
private
def find_file(project, secret, file)
uploader = FileUploader.new(project, secret: secret)
uploader.retrieve_from_store!(file)
uploader
end
end
end
end