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module SafeDiffs
class MergeRequest < Base
def initialize(merge_request, diff_options:)
@merge_request = merge_request
super(merge_request.diffs(diff_options),
project: merge_request.project,
diff_options: diff_options,
diff_refs: merge_request.diff_refs)
end
private
#
# If we find the highlighted diff files lines on the cache we replace existing diff_files lines (no highlighted)
# for the highlighted ones, so we just skip their execution.
# If the highlighted diff files lines are not cached we calculate and cache them.
#
# The content of the cache is and Hash where the key correspond to the file_path and the values are Arrays of
# hashes than represent serialized diff lines.
#
def cache_highlight!(diff_files)
highlighted_cache = Rails.cache.read(cache_key) || {}
highlighted_cache_was_empty = highlighted_cache.empty?
diff_files.each do |diff_file|
file_path = diff_file.file_path
if highlighted_cache[file_path]
highlight_diff_file_from_cache!(diff_file, highlighted_cache[file_path])
else
highlight_diff_file!(diff_file)
highlighted_cache[file_path] = diff_file.diff_lines.map(&:to_hash)
end
end
if highlighted_cache_was_empty
Rails.cache.write(cache_key, highlighted_cache)
end
diff_files
end
def cacheable?
@merge_request.merge_request_diff.present?
end
def cache_key
[@merge_request.merge_request_diff, 'highlighted-safe-diff-files', diff_options]
end
end
end
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