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Contents
module Dragonfly
class UrlMapper
# Exceptions
class BadUrlFormat < StandardError; end
class Segment < Struct.new(:param, :seperator, :pattern)
def regexp_string
@regexp_string ||= "(#{Regexp.escape(seperator)}#{pattern}+?)?"
end
#
# def regexp
# @regexp ||= Regexp.new(regexp_string)
# end
end
def initialize(url_format, patterns={})
@url_format = url_format
raise BadUrlFormat, "bad url format #{url_format}" if url_format[/[\w_]:[\w_]/]
init_segments(patterns)
init_url_regexp
end
attr_reader :url_format, :url_regexp, :segments
def params_for(path, query=nil)
if path and md = path.match(url_regexp)
params = Rack::Utils.parse_query(query)
params_in_url.each_with_index do |var, i|
value = md[i+1][1..-1] if md[i+1]
params[var] = value && URI.unescape(value)
end
params
end
end
def params_in_url
@params_in_url ||= url_format.scan(/\:[\w_]+/).map{|f| f.tr(':','') }
end
def url_for(params)
params = params.dup
url = url_format.dup
segments.each do |seg|
value = params[seg.param]
value ? url.sub!(/:[\w_]+/, URI.escape(value.to_s)) : url.sub!(/.:[\w_]+/, '')
params.delete(seg.param)
end
url << "?#{Rack::Utils.build_query(params)}" if params.any?
url
end
private
def init_segments(patterns)
@segments = []
url_format.scan(/([^\w_]):([\w_]+)/).each do |seperator, param|
segments << Segment.new(
param,
seperator,
patterns[param.to_sym] || '[^\/\-\.]'
)
end
end
def init_url_regexp
i = -1
regexp_string = url_format.gsub(/[^\w_]:[\w_]+/) do
i += 1
segments[i].regexp_string
end
@url_regexp = Regexp.new('^' + regexp_string + '$')
end
end
end
Version data entries
49 entries across 49 versions & 2 rubygems