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# frozen_string_literal: true
module MergeRequests
class ReloadDiffsService
def initialize(merge_request, current_user)
@merge_request = merge_request
@current_user = current_user
end
def execute
old_diff_refs = merge_request.diff_refs
new_diff = merge_request.create_merge_request_diff
clear_cache(new_diff)
update_diff_discussion_positions(old_diff_refs)
end
private
attr_reader :merge_request, :current_user
def update_diff_discussion_positions(old_diff_refs)
new_diff_refs = merge_request.diff_refs
merge_request.update_diff_discussion_positions(old_diff_refs: old_diff_refs,
new_diff_refs: new_diff_refs,
current_user: current_user)
end
# rubocop: disable CodeReuse/ActiveRecord
def clear_cache(new_diff)
# Remove cache for all diffs on this MR. Do not use the association on the
# model, as that will interfere with other actions happening when
# reloading the diff.
MergeRequestDiff
.where(merge_request: merge_request)
.preload(merge_request: :target_project)
.find_each do |merge_request_diff|
next if merge_request_diff == new_diff
cacheable_collection(merge_request_diff).clear_cache
end
end
# rubocop: enable CodeReuse/ActiveRecord
def cacheable_collection(diff)
# There are scenarios where we don't need to request Diff Stats.
# Mainly when clearing / writing diff caches.
diff.diffs(include_stats: false)
end
end
end
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