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# encoding: utf-8
require 'iconv'
require 'active_support/core_ext/string/multibyte'
module ActiveSupport
module Inflector
extend self
# Replaces accented characters with their ascii equivalents.
def transliterate(string)
Iconv.iconv('ascii//ignore//translit', 'utf-8', string).to_s
end
if RUBY_VERSION >= '1.9'
undef_method :transliterate
def transliterate(string)
warn "Ruby 1.9 doesn't support Unicode normalization yet"
string.dup
end
# The iconv transliteration code doesn't function correctly
# on some platforms, but it's very fast where it does function.
elsif "foo" != (Inflector.transliterate("föö") rescue nil)
undef_method :transliterate
def transliterate(string)
string.mb_chars.normalize(:kd). # Decompose accented characters
gsub(/[^\x00-\x7F]+/, '') # Remove anything non-ASCII entirely (e.g. diacritics).
end
end
# Replaces special characters in a string so that it may be used as part of a 'pretty' URL.
#
# ==== Examples
#
# class Person
# def to_param
# "#{id}-#{name.parameterize}"
# end
# end
#
# @person = Person.find(1)
# # => #<Person id: 1, name: "Donald E. Knuth">
#
# <%= link_to(@person.name, person_path(@person)) %>
# # => <a href="/person/1-donald-e-knuth">Donald E. Knuth</a>
def parameterize(string, sep = '-')
# replace accented chars with their ascii equivalents
parameterized_string = transliterate(string)
# Turn unwanted chars into the separator
parameterized_string.gsub!(/[^a-z0-9\-_\+]+/i, sep)
unless sep.nil? || sep.empty?
re_sep = Regexp.escape(sep)
# No more than one of the separator in a row.
parameterized_string.gsub!(/#{re_sep}{2,}/, sep)
# Remove leading/trailing separator.
parameterized_string.gsub!(/^#{re_sep}|#{re_sep}$/i, '')
end
parameterized_string.downcase
end
end
end
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