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# Copyright (c) 2022 Contrast Security, Inc. See https://www.contrastsecurity.com/enduser-terms-0317a for more details.
# frozen_string_literal: true
module Contrast
module Agent
module Assess
module Policy
module Propagator
# Propagation that results in all the tags of the source being
# applied to the target in reverse of how they are in the source. The
# target's preexisting tags are unaffected beyond any merging of
# overlapping tags.
class Reverse < Contrast::Agent::Assess::Policy::Propagator::Base
class << self
def propagate propagation_node, preshift, target
return unless (properties = Contrast::Agent::Assess::Tracker.properties!(target))
source = find_source(propagation_node.sources[0], preshift)
properties.copy_from(source, target, 0, propagation_node.untags)
length = target.length
properties.tag_keys.each do |key|
tags = properties.fetch_tag(key)
tags.each do |tag|
new_end = length - tag.start_idx
new_start = new_end - tag.length
tag.repurpose(new_start, new_end)
end
end
properties.cleanup_tags
end
end
end
end
end
end
end
end
Version data entries
24 entries across 24 versions & 1 rubygems