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252 lines
10 KiB
252 lines
10 KiB
# Copyright (c) 2005-2006 David Barri
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require 'gloc'
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module ActionController #:nodoc:
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class Base #:nodoc:
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include GLoc
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end
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module Filters #:nodoc:
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module ClassMethods
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# This filter attempts to auto-detect the clients desired language.
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# It first checks the params, then a cookie and then the HTTP_ACCEPT_LANGUAGE
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# request header. If a language is found to match or be similar to a currently
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# valid language, then it sets the current_language of the controller.
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#
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# class ExampleController < ApplicationController
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# set_language :en
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# autodetect_language_filter :except => 'monkey', :on_no_lang => :lang_not_autodetected_callback
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# autodetect_language_filter :only => 'monkey', :check_cookie => 'monkey_lang', :check_accept_header => false
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# ...
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# def lang_not_autodetected_callback
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# redirect_to somewhere
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# end
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# end
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#
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# The <tt>args</tt> for this filter are exactly the same the arguments of
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# <tt>before_filter</tt> with the following exceptions:
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# * <tt>:check_params</tt> -- If false, then params will not be checked for a language.
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# If a String, then this will value will be used as the name of the param.
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# * <tt>:check_cookie</tt> -- If false, then the cookie will not be checked for a language.
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# If a String, then this will value will be used as the name of the cookie.
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# * <tt>:check_accept_header</tt> -- If false, then HTTP_ACCEPT_LANGUAGE will not be checked for a language.
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# * <tt>:on_set_lang</tt> -- You can specify the name of a callback function to be called when the language
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# is successfully detected and set. The param must be a Symbol or a String which is the name of the function.
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# The callback function must accept one argument (the language) and must be instance level.
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# * <tt>:on_no_lang</tt> -- You can specify the name of a callback function to be called when the language
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# couldn't be detected automatically. The param must be a Symbol or a String which is the name of the function.
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# The callback function must be instance level.
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#
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# You override the default names of the param or cookie by calling <tt>GLoc.set_config :default_param_name => 'new_param_name'</tt>
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# and <tt>GLoc.set_config :default_cookie_name => 'new_cookie_name'</tt>.
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def autodetect_language_filter(*args)
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options= args.last.is_a?(Hash) ? args.last : {}
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x= 'Proc.new { |c| l= nil;'
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# :check_params
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unless (v= options.delete(:check_params)) == false
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name= v ? ":#{v}" : 'GLoc.get_config(:default_param_name)'
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x << "l ||= GLoc.similar_language(c.params[#{name}]);"
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end
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# :check_cookie
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unless (v= options.delete(:check_cookie)) == false
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name= v ? ":#{v}" : 'GLoc.get_config(:default_cookie_name)'
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x << "l ||= GLoc.similar_language(c.send(:cookies)[#{name}]);"
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end
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# :check_accept_header
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unless options.delete(:check_accept_header) == false
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x << %<
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unless l
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a= c.request.env['HTTP_ACCEPT_LANGUAGE'].split(/,|;/) rescue nil
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a.each {|x| l ||= GLoc.similar_language(x)} if a
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end; >
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end
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# Set language
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x << 'ret= true;'
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x << 'if l; c.set_language(l); c.headers[\'Content-Language\']= l.to_s; '
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if options.has_key?(:on_set_lang)
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x << "ret= c.#{options.delete(:on_set_lang)}(l);"
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end
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if options.has_key?(:on_no_lang)
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x << "else; ret= c.#{options.delete(:on_no_lang)};"
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end
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x << 'end; ret }'
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# Create filter
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block= eval x
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before_filter(*args, &block)
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end
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end
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end
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end
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# ==============================================================================
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module ActionMailer #:nodoc:
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# In addition to including GLoc, <tt>render_message</tt> is also overridden so
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# that mail templates contain the current language at the end of the file.
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# Eg. <tt>deliver_hello</tt> will render <tt>hello_en.rhtml</tt>.
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class Base
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include GLoc
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private
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alias :render_message_without_gloc :render_message
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def render_message(method_name, body)
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template = File.exist?("#{template_path}/#{method_name}_#{current_language}.rhtml") ? "#{method_name}_#{current_language}" : "#{method_name}"
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render_message_without_gloc(template, body)
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end
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end
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end
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# ==============================================================================
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module ActionView #:nodoc:
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# <tt>initialize</tt> is overridden so that new instances of this class inherit
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# the current language of the controller.
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class Base
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include GLoc
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alias :initialize_without_gloc :initialize
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def initialize(base_path = nil, assigns_for_first_render = {}, controller = nil)
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initialize_without_gloc(base_path, assigns_for_first_render, controller)
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set_language controller.current_language unless controller.nil?
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end
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end
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module Helpers #:nodoc:
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class InstanceTag
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include GLoc
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# Inherits the current language from the template object.
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def current_language
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@template_object.current_language
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end
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end
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end
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end
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# ==============================================================================
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module ActiveRecord #:nodoc:
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class Base #:nodoc:
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include GLoc
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end
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# class Errors
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# include GLoc
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# alias :add_without_gloc :add
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# # The GLoc version of this method provides two extra features
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# # * If <tt>msg</tt> is a string, it will be considered a GLoc string key.
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# # * If <tt>msg</tt> is an array, the first element will be considered
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# # the string and the remaining elements will be considered arguments for the
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# # string. Eg. <tt>['Hi %s.','John']</tt>
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# def add(attribute, msg= @@default_error_messages[:invalid])
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# if msg.is_a?(Array)
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# args= msg.clone
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# msg= args.shift
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# args= nil if args.empty?
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# end
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# msg= ltry(msg)
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# msg= msg % args unless args.nil?
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# add_without_gloc(attribute, msg)
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# end
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# # Inherits the current language from the base record.
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# def current_language
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# @base.current_language
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# end
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# end
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class Errors
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include GLoc
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def full_messages
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full_messages = []
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@errors.each_key do |attr|
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@errors[attr].each do |msg|
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next if msg.nil?
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if attr == "base"
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full_messages << (msg.is_a?(Symbol) ? l(msg) : msg)
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else
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full_messages << @base.class.human_attribute_name(attr) + " " + (msg.is_a?(Symbol) ? l(msg) : msg)
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end
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end
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end
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full_messages
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end
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end
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module Validations #:nodoc:
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module ClassMethods
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# The default Rails version of this function creates an error message and then
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# passes it to ActiveRecord.Errors.
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# The GLoc version of this method, sends an array to ActiveRecord.Errors that will
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# be turned into a string by ActiveRecord.Errors which in turn allows for the message
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# of this validation function to be a GLoc string key.
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def validates_length_of(*attrs)
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# Merge given options with defaults.
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options = {
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:too_long => ActiveRecord::Errors.default_error_messages[:too_long],
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:too_short => ActiveRecord::Errors.default_error_messages[:too_short],
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:wrong_length => ActiveRecord::Errors.default_error_messages[:wrong_length]
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}.merge(DEFAULT_VALIDATION_OPTIONS)
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options.update(attrs.pop.symbolize_keys) if attrs.last.is_a?(Hash)
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# Ensure that one and only one range option is specified.
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range_options = ALL_RANGE_OPTIONS & options.keys
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case range_options.size
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when 0
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raise ArgumentError, 'Range unspecified. Specify the :within, :maximum, :minimum, or :is option.'
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when 1
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# Valid number of options; do nothing.
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else
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raise ArgumentError, 'Too many range options specified. Choose only one.'
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end
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# Get range option and value.
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option = range_options.first
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option_value = options[range_options.first]
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case option
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when :within, :in
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raise ArgumentError, ":#{option} must be a Range" unless option_value.is_a?(Range)
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too_short = [options[:too_short] , option_value.begin]
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too_long = [options[:too_long] , option_value.end ]
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validates_each(attrs, options) do |record, attr, value|
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if value.nil? or value.split(//).size < option_value.begin
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record.errors.add(attr, too_short)
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elsif value.split(//).size > option_value.end
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record.errors.add(attr, too_long)
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end
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end
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when :is, :minimum, :maximum
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raise ArgumentError, ":#{option} must be a nonnegative Integer" unless option_value.is_a?(Integer) and option_value >= 0
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# Declare different validations per option.
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validity_checks = { :is => "==", :minimum => ">=", :maximum => "<=" }
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message_options = { :is => :wrong_length, :minimum => :too_short, :maximum => :too_long }
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message = [(options[:message] || options[message_options[option]]) , option_value]
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validates_each(attrs, options) do |record, attr, value|
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if value.kind_of?(String)
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record.errors.add(attr, message) unless !value.nil? and value.split(//).size.method(validity_checks[option])[option_value]
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else
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record.errors.add(attr, message) unless !value.nil? and value.size.method(validity_checks[option])[option_value]
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end
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end
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end
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end
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alias_method :validates_size_of, :validates_length_of
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end
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end
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end
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# ==============================================================================
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module ApplicationHelper #:nodoc:
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include GLoc
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end
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