77 lines
2.1 KiB
Ruby
77 lines
2.1 KiB
Ruby
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# frozen_string_literal: true
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module Gitlab
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module DiscussionsDiff
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class FileCollection
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include Gitlab::Utils::StrongMemoize
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def initialize(collection)
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@collection = collection
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end
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# Returns a Gitlab::Diff::File with the given ID (`unique_identifier` in
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# Gitlab::Diff::File).
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def find_by_id(id)
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diff_files_indexed_by_id[id]
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end
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# Writes cache and preloads highlighted diff lines for
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# object IDs, in @collection.
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#
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# highlightable_ids - Diff file `Array` responding to ID. The ID will be used
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# to generate the cache key.
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#
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# - Highlight cache is written just for uncached diff files
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# - The cache content is not updated (there's no need to do so)
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def load_highlight(highlightable_ids)
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preload_highlighted_lines(highlightable_ids)
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end
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private
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def preload_highlighted_lines(ids)
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cached_content = read_cache(ids)
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uncached_ids = ids.select.each_with_index { |_, i| cached_content[i].nil? }
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mapping = highlighted_lines_by_ids(uncached_ids)
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HighlightCache.write_multiple(mapping)
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diffs = diff_files_indexed_by_id.values_at(*ids)
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diffs.zip(cached_content).each do |diff, cached_lines|
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next unless diff && cached_lines
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diff.highlighted_diff_lines = cached_lines
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end
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end
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def read_cache(ids)
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HighlightCache.read_multiple(ids)
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end
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def diff_files_indexed_by_id
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strong_memoize(:diff_files_indexed_by_id) do
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diff_files.index_by(&:unique_identifier)
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end
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end
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def diff_files
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strong_memoize(:diff_files) do
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@collection.map(&:raw_diff_file)
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end
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end
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# Processes the diff lines highlighting for diff files matching the given
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# IDs.
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#
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# Returns a Hash with { id => [Array of Gitlab::Diff::line], ...]
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def highlighted_lines_by_ids(ids)
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diff_files_indexed_by_id.slice(*ids).each_with_object({}) do |(id, file), hash|
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hash[id] = file.highlighted_diff_lines.map(&:to_hash)
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end
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end
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end
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end
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end
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