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# frozen_string_literal: true
#
module Gitlab
module DiscussionsDiff
class HighlightCache
class << self
VERSION = 1
EXPIRATION = 1.week
# Sets multiple keys to a given value. The value
# is serialized as JSON.
#
# mapping - Write multiple cache values at once
def write_multiple(mapping)
Redis::Cache.with do |redis|
redis.multi do |multi|
mapping.each do |raw_key, value|
key = cache_key_for(raw_key)
multi.set(key, value.to_json, ex: EXPIRATION)
end
end
end
end
# Reads multiple cache keys at once.
#
# raw_keys - An Array of unique cache keys, without namespaces.
#
# It returns a list of deserialized diff lines. Ex.:
# [[Gitlab::Diff::Line, ...], [Gitlab::Diff::Line]]
def read_multiple(raw_keys)
return [] if raw_keys.empty?
keys = raw_keys.map { |id| cache_key_for(id) }
content =
Redis::Cache.with do |redis|
redis.mget(keys)
end
content.map! do |lines|
next unless lines
JSON.parse(lines).map! do |line|
line = line.with_indifferent_access
rich_text = line[:rich_text]
line[:rich_text] = rich_text&.html_safe
Gitlab::Diff::Line.init_from_hash(line)
end
end
end
def cache_key_for(raw_key)
"#{cache_key_prefix}:#{raw_key}"
end
private
def cache_key_prefix
"#{Redis::Cache::CACHE_NAMESPACE}:#{VERSION}:discussion-highlight"
end
end
end
end
end
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