68 lines
1.7 KiB
Ruby
68 lines
1.7 KiB
Ruby
# frozen_string_literal: true
|
|
#
|
|
module Gitlab
|
|
module Diff
|
|
class DeprecatedHighlightCache
|
|
delegate :diffable, to: :@diff_collection
|
|
delegate :diff_options, to: :@diff_collection
|
|
|
|
def initialize(diff_collection, backend: Rails.cache)
|
|
@backend = backend
|
|
@diff_collection = diff_collection
|
|
end
|
|
|
|
# - Reads from cache
|
|
# - Assigns DiffFile#highlighted_diff_lines for cached files
|
|
def decorate(diff_file)
|
|
if content = read_file(diff_file)
|
|
diff_file.highlighted_diff_lines = content.map do |line|
|
|
Gitlab::Diff::Line.init_from_hash(line)
|
|
end
|
|
end
|
|
end
|
|
|
|
# It populates a Hash in order to submit a single write to the memory
|
|
# cache. This avoids excessive IO generated by N+1's (1 writing for
|
|
# each highlighted line or file).
|
|
def write_if_empty
|
|
return if cached_content.present?
|
|
|
|
@diff_collection.diff_files.each do |diff_file|
|
|
next unless cacheable?(diff_file)
|
|
|
|
diff_file_id = diff_file.file_identifier
|
|
|
|
cached_content[diff_file_id] = diff_file.highlighted_diff_lines.map(&:to_hash)
|
|
end
|
|
|
|
cache.write(key, cached_content, expires_in: 1.week)
|
|
end
|
|
|
|
def clear
|
|
cache.delete(key)
|
|
end
|
|
|
|
def key
|
|
[diffable, 'highlighted-diff-files', Gitlab::Diff::Line::SERIALIZE_KEYS, diff_options]
|
|
end
|
|
|
|
private
|
|
|
|
def read_file(diff_file)
|
|
cached_content[diff_file.file_identifier]
|
|
end
|
|
|
|
def cache
|
|
@backend
|
|
end
|
|
|
|
def cached_content
|
|
@cached_content ||= cache.read(key) || {}
|
|
end
|
|
|
|
def cacheable?(diff_file)
|
|
diffable.present? && diff_file.text? && diff_file.diffable?
|
|
end
|
|
end
|
|
end
|
|
end
|