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module I18n
# Handles exceptions raised in the backend. All exceptions except for
# MissingTranslationData exceptions are re-thrown. When a MissingTranslationData
# was caught the handler returns an error message string containing the key/scope.
# Note that the exception handler is not called when the option :throw was given.
class ExceptionHandler
include Module.new {
def call(exception, locale, key, options)
if exception.is_a?(MissingTranslation)
options[:rescue_format] == :html ? exception.html_message : exception.message
elsif exception.is_a?(Exception)
raise exception
else
throw :exception, exception
end
end
}
end
class ArgumentError < ::ArgumentError; end
class InvalidLocale < ArgumentError
attr_reader :locale
def initialize(locale)
@locale = locale
super "#{locale.inspect} is not a valid locale"
end
end
class InvalidLocaleData < ArgumentError
attr_reader :filename
def initialize(filename)
@filename = filename
super "can not load translations from #{filename}, expected it to return a hash, but does not"
end
end
class MissingTranslation
module Base
attr_reader :locale, :key, :options
def initialize(locale, key, options = nil)
@key, @locale, @options = key, locale, options.dup || {}
options.each { |k, v| self.options[k] = v.inspect if v.is_a?(Proc) }
end
def html_message
key = keys.last.to_s.gsub('_', ' ').gsub(/\b('?[a-z])/) { $1.capitalize }
%(<span class="translation_missing" title="translation missing: #{keys.join('.')}">#{key}</span>)
end
def keys
@keys ||= I18n.normalize_keys(locale, key, options[:scope]).tap do |keys|
keys << 'no key' if keys.size < 2
end
end
def message
"translation missing: #{keys.join('.')}"
end
alias :to_s :message
def to_exception
MissingTranslationData.new(locale, key, options)
end
end
include Base
end
class MissingTranslationData < ArgumentError
include MissingTranslation::Base
end
class InvalidPluralizationData < ArgumentError
attr_reader :entry, :count
def initialize(entry, count)
@entry, @count = entry, count
super "translation data #{entry.inspect} can not be used with :count => #{count}"
end
end
class MissingInterpolationArgument < ArgumentError
attr_reader :key, :values, :string
def initialize(key, values, string)
@key, @values, @string = key, values, string
super "missing interpolation argument #{key.inspect} in #{string.inspect} (#{values.inspect} given)"
end
end
class ReservedInterpolationKey < ArgumentError
attr_reader :key, :string
def initialize(key, string)
@key, @string = key, string
super "reserved key #{key.inspect} used in #{string.inspect}"
end
end
class UnknownFileType < ArgumentError
attr_reader :type, :filename
def initialize(type, filename)
@type, @filename = type, filename
super "can not load translations from #{filename}, the file type #{type} is not known"
end
end
end
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