lib/open_project/text_formatting/filters/attachment_filter.rb
#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2024 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See COPYRIGHT and LICENSE files for more details.
#++
module OpenProject::TextFormatting
module Filters
class AttachmentFilter < HTML::Pipeline::Filter
include OpenProject::StaticRouting::UrlHelpers
include OpenProject::ObjectLinking
def matched_filenames_regex
/(bmp|gif|jpe?g|png|svg)\z/
end
def call
attachments = get_attachments
rewriter = ::OpenProject::TextFormatting::Helpers::LinkRewriter.new context
doc.css("img[src]").each do |node|
# Check for relative URLs and replace them if needed
if rewriter.applicable? node["src"]
node["src"] = rewriter.replace node["src"]
next
end
# Don't try to lookup attachments if we don't have any
next if attachments.nil?
# We allow linking to filenames that are replaced with their attachment URL
lookup_attachment_by_name node, attachments
end
doc
end
##
# Lookup a local attachment name
def lookup_attachment_by_name(node, attachments)
filename = node["src"].downcase
# We only match a specific set of attributes as before
return unless filename&.match?(matched_filenames_regex)
# Try to find the attachment
if (attachment = attachments.detect { |att| att.filename.downcase == filename })
node["src"] = url_to_attachment(attachment, only_path: context[:only_path])
# Replace alt text with description, unless it has one already
node["alt"] = node["alt"].presence || attachment.description
end
end
def get_attachments
attachments = context[:attachments] || context[:object].try(:attachments)
return nil unless attachments
attachments.sort_by(&:created_at).reverse
end
end
end
end