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module I18n
module Backend
# A simple backend that reads translations from YAML files and stores them in
# an in-memory hash. Relies on the Base backend.
#
# The implementation is provided by a Implementation module allowing to easily
# extend Simple backend's behavior by including modules. E.g.:
#
# module I18n::Backend::Pluralization
# def pluralize(*args)
# # extended pluralization logic
# super
# end
# end
#
# I18n::Backend::Simple.send(:include, I18n::Backend::Pluralization)
class Simple
module Implementation
include Base
def initialized?
@initialized ||= false
end
# Stores translations for the given locale in memory.
# This uses a deep merge for the translations hash, so existing
# translations will be overwritten by new ones only at the deepest
# level of the hash.
def store_translations(locale, data, options = {})
locale = locale.to_sym
translations[locale] ||= {}
data = data.deep_symbolize_keys
translations[locale].deep_merge!(data)
end
# Get available locales from the translations hash
def available_locales
init_translations unless initialized?
translations.inject([]) do |locales, (locale, data)|
locales << locale unless (data.keys - [:i18n]).empty?
locales
end
end
# Clean up translations hash and set initialized to false on reload!
def reload!
@initialized = false
@translations = nil
super
end
protected
def init_translations
load_translations
@initialized = true
end
def translations
@translations ||= {}
end
# Looks up a translation from the translations hash. Returns nil if
# eiher key is nil, or locale, scope or key do not exist as a key in the
# nested translations hash. Splits keys or scopes containing dots
# into multiple keys, i.e. <tt>currency.format</tt> is regarded the same as
# <tt>%w(currency format)</tt>.
def lookup(locale, key, scope = [], options = {})
init_translations unless initialized?
keys = I18n.normalize_keys(locale, key, scope, options[:separator])
keys.inject(translations) do |result, _key|
_key = _key.to_sym
return nil unless result.is_a?(Hash) && result.has_key?(_key)
result = result[_key]
result = resolve(locale, _key, result, options.merge(:scope => nil)) if result.is_a?(Symbol)
result
end
end
end
include Implementation
end
end
end
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