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# I18n translation metadata is useful when you want to access information
# about how a translation was looked up, pluralized or interpolated in
# your application.
#
# msg = I18n.t(:message, :default => 'Hi!', :scope => :foo)
# msg.translation_metadata
# # => { :key => :message, :scope => :foo, :default => 'Hi!' }
#
# If a :count option was passed to #translate it will be set to the metadata.
# Likewise, if any interpolation variables were passed they will also be set.
#
# To enable translation metadata you can simply include the Metadata module
# into the Simple backend class - or whatever other backend you are using:
#
# I18n::Backend::Simple.include(I18n::Backend::Metadata)
#
module I18n
module Backend
module Metadata
class << self
def included(base)
Object.class_eval do
def translation_metadata
@translation_metadata ||= {}
end
def translation_metadata=(translation_metadata)
@translation_metadata = translation_metadata
end
end unless Object.method_defined?(:translation_metadata)
end
end
def translate(locale, key, options = {})
metadata = {
:locale => locale,
:key => key,
:scope => options[:scope],
:default => options[:default],
:separator => options[:separator],
:values => options.reject { |name, value| RESERVED_KEYS.include?(name) }
}
with_metadata(metadata) { super }
end
def interpolate(locale, entry, values = {})
metadata = entry.translation_metadata.merge(:original => entry)
with_metadata(metadata) { super }
end
def pluralize(locale, entry, count)
with_metadata(:count => count) { super }
end
protected
def with_metadata(metadata, &block)
result = yield
result.translation_metadata = result.translation_metadata.merge(metadata) if result
result
end
end
end
end
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