70 lines
1.7 KiB
Ruby
70 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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require 'fileutils'
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module Gitlab
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module Gfm
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##
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# Class that rewrites markdown links for uploads
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#
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# Using a pattern defined in `FileUploader` it copies files to a new
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# project and rewrites all links to uploads in a given text.
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#
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#
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class UploadsRewriter
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def initialize(text, source_project, _current_user)
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@text = text
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@source_project = source_project
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@pattern = FileUploader::MARKDOWN_PATTERN
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end
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def rewrite(target_parent)
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return @text unless needs_rewrite?
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@text.gsub(@pattern) do |markdown|
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Gitlab::Utils.check_path_traversal!($~[:file])
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file = find_file(@source_project, $~[:secret], $~[:file])
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break markdown unless file.try(:exists?)
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klass = target_parent.is_a?(Namespace) ? NamespaceFileUploader : FileUploader
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moved = klass.copy_to(file, target_parent)
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moved_markdown = moved.markdown_link
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# Prevents rewrite of plain links as embedded
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if was_embedded?(markdown)
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moved_markdown
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else
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moved_markdown.sub(/\A!/, "")
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end
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end
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end
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def needs_rewrite?
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files.any?
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end
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def files
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referenced_files = @text.scan(@pattern).map do
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find_file(@source_project, $~[:secret], $~[:file])
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end
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referenced_files.compact.select(&:exists?)
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end
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def was_embedded?(markdown)
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markdown.starts_with?("!")
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end
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private
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def find_file(project, secret, file)
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uploader = FileUploader.new(project, secret: secret)
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uploader.retrieve_from_store!(file)
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uploader
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end
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end
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end
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end
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