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Versions: 16
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Stored size: 1.3 KB
Contents
# frozen_string_literal: true
module Thredded
module UsersProvider
module_function
def call(user_names, scope)
DbTextSearch::CaseInsensitive
.new(scope, Thredded.user_name_column)
.in(user_names)
end
end
class UsersProviderWithCache
def initialize
@mutex = Mutex.new
@cache = {}
end
def call(names, scope)
# This is not the same as the database lowercasing but it's OK.
# The worst that can happen is some cache misses.
names_with_lowercase = names.zip(names.map(&:downcase))
cached = uncached = nil
result = @mutex.synchronize do
scope_cache = (@cache[scope.to_sql] ||= {})
cached, uncached = names_with_lowercase.partition { |(_, lowercase)| scope_cache.key?(lowercase) }
fetched = UsersProvider.call(uncached.map(&:first), scope)
fetched.each do |user|
scope_cache[user.send(Thredded.user_name_column).downcase] = user
end
cached.map { |(_, lowercase)| scope_cache[lowercase] }.concat(fetched)
end
result.uniq!
result.compact!
Rails.logger.info(
" [Thredded::UsersProviderWithCache] #{names.size} user names => #{result.size} users "\
"(#{cached.size} cached, #{uncached.size} uncached)"
)
result
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems