--- /dev/null
+require 'yaml'
+
+module I18n
+ module Backend
+ class Simple
+ INTERPOLATION_RESERVED_KEYS = %w(scope default)
+ MATCH = /(\\\\)?\{\{([^\}]+)\}\}/
+
+ # Accepts a list of paths to translation files. Loads translations from
+ # plain Ruby (*.rb) or YAML files (*.yml). See #load_rb and #load_yml
+ # for details.
+ def load_translations(*filenames)
+ filenames.each { |filename| load_file(filename) }
+ 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)
+ merge_translations(locale, data)
+ end
+
+ def translate(locale, key, options = {})
+ raise InvalidLocale.new(locale) if locale.nil?
+ return key.map { |k| translate(locale, k, options) } if key.is_a? Array
+
+ reserved = :scope, :default
+ count, scope, default = options.values_at(:count, *reserved)
+ options.delete(:default)
+ values = options.reject { |name, value| reserved.include?(name) }
+
+ entry = lookup(locale, key, scope)
+ if entry.nil?
+ entry = default(locale, default, options)
+ if entry.nil?
+ raise(I18n::MissingTranslationData.new(locale, key, options))
+ end
+ end
+ entry = pluralize(locale, entry, count)
+ entry = interpolate(locale, entry, values)
+ entry
+ end
+
+ # Acts the same as +strftime+, but returns a localized version of the
+ # formatted date string. Takes a key from the date/time formats
+ # translations as a format argument (<em>e.g.</em>, <tt>:short</tt> in <tt>:'date.formats'</tt>).
+ def localize(locale, object, format = :default)
+ raise ArgumentError, "Object must be a Date, DateTime or Time object. #{object.inspect} given." unless object.respond_to?(:strftime)
+
+ type = object.respond_to?(:sec) ? 'time' : 'date'
+ # TODO only translate these if format is a String?
+ formats = translate(locale, :"#{type}.formats")
+ format = formats[format.to_sym] if formats && formats[format.to_sym]
+ # TODO raise exception unless format found?
+ format = format.to_s.dup
+
+ # TODO only translate these if the format string is actually present
+ # TODO check which format strings are present, then bulk translate then, then replace them
+ format.gsub!(/%a/, translate(locale, :"date.abbr_day_names")[object.wday])
+ format.gsub!(/%A/, translate(locale, :"date.day_names")[object.wday])
+ format.gsub!(/%b/, translate(locale, :"date.abbr_month_names")[object.mon])
+ format.gsub!(/%B/, translate(locale, :"date.month_names")[object.mon])
+ format.gsub!(/%p/, translate(locale, :"time.#{object.hour < 12 ? :am : :pm}")) if object.respond_to? :hour
+ object.strftime(format)
+ end
+
+ def initialized?
+ @initialized ||= false
+ end
+
+ def reload!
+ @initialized = false
+ @translations = nil
+ end
+
+ protected
+ def init_translations
+ load_translations(*I18n.load_path)
+ @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 = [])
+ return unless key
+ init_translations unless initialized?
+ keys = I18n.send(:normalize_translation_keys, locale, key, scope)
+ keys.inject(translations) do |result, k|
+ if (x = result[k.to_sym]).nil?
+ return nil
+ else
+ x
+ end
+ end
+ end
+
+ # Evaluates a default translation.
+ # If the given default is a String it is used literally. If it is a Symbol
+ # it will be translated with the given options. If it is an Array the first
+ # translation yielded will be returned.
+ #
+ # <em>I.e.</em>, <tt>default(locale, [:foo, 'default'])</tt> will return +default+ if
+ # <tt>translate(locale, :foo)</tt> does not yield a result.
+ def default(locale, default, options = {})
+ case default
+ when String then default
+ when Symbol then translate locale, default, options
+ when Array then default.each do |obj|
+ result = default(locale, obj, options.dup) and return result
+ end and nil
+ end
+ rescue MissingTranslationData
+ nil
+ end
+
+ # Picks a translation from an array according to English pluralization
+ # rules. It will pick the first translation if count is not equal to 1
+ # and the second translation if it is equal to 1. Other backends can
+ # implement more flexible or complex pluralization rules.
+ def pluralize(locale, entry, count)
+ return entry unless entry.is_a?(Hash) and count
+ # raise InvalidPluralizationData.new(entry, count) unless entry.is_a?(Hash)
+ key = :zero if count == 0 && entry.has_key?(:zero)
+ key ||= count == 1 ? :one : :other
+ raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
+ entry[key]
+ end
+
+ # Interpolates values into a given string.
+ #
+ # interpolate "file {{file}} opened by \\{{user}}", :file => 'test.txt', :user => 'Mr. X'
+ # # => "file test.txt opened by {{user}}"
+ #
+ # Note that you have to double escape the <tt>\\</tt> when you want to escape
+ # the <tt>{{...}}</tt> key in a string (once for the string and once for the
+ # interpolation).
+ def interpolate(locale, string, values = {})
+ return string unless string.is_a?(String)
+
+ if string.respond_to?(:force_encoding)
+ original_encoding = string.encoding
+ string.force_encoding(Encoding::BINARY)
+ end
+
+ result = string.gsub(MATCH) do
+ escaped, pattern, key = $1, $2, $2.to_sym
+
+ if escaped
+ pattern
+ elsif INTERPOLATION_RESERVED_KEYS.include?(pattern)
+ raise ReservedInterpolationKey.new(pattern, string)
+ elsif !values.include?(key)
+ raise MissingInterpolationArgument.new(pattern, string)
+ else
+ values[key].to_s
+ end
+ end
+
+ result.force_encoding(original_encoding) if original_encoding
+ result
+ end
+
+ # Loads a single translations file by delegating to #load_rb or
+ # #load_yml depending on the file extension and directly merges the
+ # data to the existing translations. Raises I18n::UnknownFileType
+ # for all other file extensions.
+ def load_file(filename)
+ type = File.extname(filename).tr('.', '').downcase
+ raise UnknownFileType.new(type, filename) unless respond_to?(:"load_#{type}")
+ data = send :"load_#{type}", filename # TODO raise a meaningful exception if this does not yield a Hash
+ data.each { |locale, d| merge_translations(locale, d) }
+ end
+
+ # Loads a plain Ruby translations file. eval'ing the file must yield
+ # a Hash containing translation data with locales as toplevel keys.
+ def load_rb(filename)
+ eval(IO.read(filename), binding, filename)
+ end
+
+ # Loads a YAML translations file. The data must have locales as
+ # toplevel keys.
+ def load_yml(filename)
+ YAML::load(IO.read(filename))
+ end
+
+ # Deep merges the given translations hash with the existing translations
+ # for the given locale
+ def merge_translations(locale, data)
+ locale = locale.to_sym
+ translations[locale] ||= {}
+ data = deep_symbolize_keys(data)
+
+ # deep_merge by Stefan Rusterholz, see http://www.ruby-forum.com/topic/142809
+ merger = proc { |key, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
+ translations[locale].merge!(data, &merger)
+ end
+
+ # Return a new hash with all keys and nested keys converted to symbols.
+ def deep_symbolize_keys(hash)
+ hash.inject({}) { |result, (key, value)|
+ value = deep_symbolize_keys(value) if value.is_a? Hash
+ result[(key.to_sym rescue key) || key] = value
+ result
+ }
+ end
+ end
+ end
+end
\ No newline at end of file
projects / depot.git / blobdiff