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Contents
# frozen_string_literal: true
require "active_support/concern"
module Decidim
# This concern contains the logic related to nicknames.
module Nicknamizable
extend ActiveSupport::Concern
included do
validates :nickname, length: { maximum: nickname_max_length }, allow_blank: true
end
class_methods do
#
# Maximum allowed nickname length
#
def nickname_max_length
20
end
#
# Converts any string into a valid nickname
#
# * Parameterizes it so it's valid as a URL.
# * Trims length so it fits validation constraints.
# * Disambiguates it so it's unique.
#
def nicknamize(name)
disambiguate(name.parameterize(separator: "_")[nickname_length_range])
end
private
def nickname_length_range
(0...nickname_max_length)
end
def disambiguate(name)
candidate = name
2.step do |n|
return candidate unless exists?(nickname: candidate)
candidate = numbered_variation_of(name, n)
end
end
def numbered_variation_of(name, number)
appendix = "_#{number}"
"#{name[0...(nickname_max_length - appendix.length)]}#{appendix}"
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems