lib/global_config.rb
class GlobalConfig
VERSION = 'V1'.freeze
KEY_PREFIX = 'GLOBAL_CONFIG'.freeze
DEFAULT_EXPIRY = 1.day
class << self
def get(*args)
config_keys = *args
config = {}
config_keys.each do |config_key|
config[config_key] = load_from_cache(config_key)
end
typecast_config(config)
config.with_indifferent_access
end
def get_value(arg)
load_from_cache(arg)
end
def clear_cache
cached_keys = $alfred.with { |conn| conn.keys("#{VERSION}:#{KEY_PREFIX}:*") }
(cached_keys || []).each do |cached_key|
$alfred.with { |conn| conn.expire(cached_key, 0) }
end
end
private
def typecast_config(config)
general_configs = ConfigLoader.new.general_configs
config.each do |config_key, config_value|
config_type = general_configs.find { |c| c['name'] == config_key }&.dig('type')
config[config_key] = ActiveRecord::Type::Boolean.new.cast(config_value) if config_type == 'boolean'
end
end
def load_from_cache(config_key)
cache_key = "#{VERSION}:#{KEY_PREFIX}:#{config_key}"
cached_value = $alfred.with { |conn| conn.get(cache_key) }
if cached_value.blank?
value_from_db = db_fallback(config_key)
cached_value = { value: value_from_db }.to_json
$alfred.with { |conn| conn.set(cache_key, cached_value, { ex: DEFAULT_EXPIRY }) }
end
JSON.parse(cached_value)['value']
end
def db_fallback(config_key)
InstallationConfig.find_by(name: config_key)&.value
end
end
end