module ActionController module Routing class Segment #:nodoc: RESERVED_PCHAR = ':@&=+$,;' UNSAFE_PCHAR = Regexp.new("[^#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}]", false, 'N').freeze attr_accessor :is_optional alias_method :optional?, :is_optional def initialize self.is_optional = false end def extraction_code nil end # Continue generating string for the prior segments. def continue_string_structure(prior_segments) if prior_segments.empty? interpolation_statement(prior_segments) else new_priors = prior_segments[0..-2] prior_segments.last.string_structure(new_priors) end end def interpolation_chunk URI.escape(value, UNSAFE_PCHAR) end # Return a string interpolation statement for this segment and those before it. def interpolation_statement(prior_segments) chunks = prior_segments.collect { |s| s.interpolation_chunk } chunks << interpolation_chunk "\"#{chunks * ''}\"#{all_optionals_available_condition(prior_segments)}" end def string_structure(prior_segments) optional? ? continue_string_structure(prior_segments) : interpolation_statement(prior_segments) end # Return an if condition that is true if all the prior segments can be generated. # If there are no optional segments before this one, then nil is returned. def all_optionals_available_condition(prior_segments) optional_locals = prior_segments.collect { |s| s.local_name if s.optional? && s.respond_to?(:local_name) }.compact optional_locals.empty? ? nil : " if #{optional_locals * ' && '}" end # Recognition def match_extraction(next_capture) nil end # Warning # Returns true if this segment is optional? because of a default. If so, then # no warning will be emitted regarding this segment. def optionality_implied? false end end class StaticSegment < Segment #:nodoc: attr_accessor :value, :raw alias_method :raw?, :raw def initialize(value = nil) super() self.value = value end def interpolation_chunk raw? ? value : super end def regexp_chunk chunk = Regexp.escape(value) optional? ? Regexp.optionalize(chunk) : chunk end def build_pattern(pattern) escaped = Regexp.escape(value) if optional? && ! pattern.empty? "(?:#{Regexp.optionalize escaped}\\Z|#{escaped}#{Regexp.unoptionalize pattern})" elsif optional? Regexp.optionalize escaped else escaped + pattern end end def to_s value end end class DividerSegment < StaticSegment #:nodoc: def initialize(value = nil) super(value) self.raw = true self.is_optional = true end def optionality_implied? true end end class DynamicSegment < Segment #:nodoc: attr_accessor :key, :default, :regexp def initialize(key = nil, options = {}) super() self.key = key self.default = options[:default] if options.key? :default self.is_optional = true if options[:optional] || options.key?(:default) end def to_s ":#{key}" end # The local variable name that the value of this segment will be extracted to. def local_name "#{key}_value" end def extract_value "#{local_name} = hash[:#{key}] && hash[:#{key}].to_param #{"|| #{default.inspect}" if default}" end def value_check if default # Then we know it won't be nil "#{value_regexp.inspect} =~ #{local_name}" if regexp elsif optional? # If we have a regexp check that the value is not given, or that it matches. # If we have no regexp, return nil since we do not require a condition. "#{local_name}.nil? || #{value_regexp.inspect} =~ #{local_name}" if regexp else # Then it must be present, and if we have a regexp, it must match too. "#{local_name} #{"&& #{value_regexp.inspect} =~ #{local_name}" if regexp}" end end def expiry_statement "expired, hash = true, options if !expired && expire_on[:#{key}]" end def extraction_code s = extract_value vc = value_check s << "\nreturn [nil,nil] unless #{vc}" if vc s << "\n#{expiry_statement}" end def interpolation_chunk(value_code = "#{local_name}") "\#{URI.escape(#{value_code}.to_s, ActionController::Routing::Segment::UNSAFE_PCHAR)}" end def string_structure(prior_segments) if optional? # We have a conditional to do... # If we should not appear in the url, just write the code for the prior # segments. This occurs if our value is the default value, or, if we are # optional, if we have nil as our value. "if #{local_name} == #{default.inspect}\n" + continue_string_structure(prior_segments) + "\nelse\n" + # Otherwise, write the code up to here "#{interpolation_statement(prior_segments)}\nend" else interpolation_statement(prior_segments) end end def value_regexp Regexp.new "\\A#{regexp.to_s}\\Z" if regexp end def regexp_chunk if regexp if regexp_has_modifiers? "(#{regexp.to_s})" else "(#{regexp.source})" end else "([^#{Routing::SEPARATORS.join}]+)" end end def build_pattern(pattern) chunk = regexp_chunk chunk = "(#{chunk})" if Regexp.new(chunk).number_of_captures == 0 pattern = "#{chunk}#{pattern}" optional? ? Regexp.optionalize(pattern) : pattern end def match_extraction(next_capture) # All non code-related keys (such as :id, :slug) are URI-unescaped as # path parameters. default_value = default ? default.inspect : nil %[ value = if (m = match[#{next_capture}]) URI.unescape(m) else #{default_value} end params[:#{key}] = value if value ] end def optionality_implied? [:action, :id].include? key end def regexp_has_modifiers? regexp.options & (Regexp::IGNORECASE | Regexp::EXTENDED) != 0 end end class ControllerSegment < DynamicSegment #:nodoc: def regexp_chunk possible_names = Routing.possible_controllers.collect { |name| Regexp.escape name } "(?i-:(#{(regexp || Regexp.union(*possible_names)).source}))" end # Don't URI.escape the controller name since it may contain slashes. def interpolation_chunk(value_code = "#{local_name}") "\#{#{value_code}.to_s}" end # Make sure controller names like Admin/Content are correctly normalized to # admin/content def extract_value "#{local_name} = (hash[:#{key}] #{"|| #{default.inspect}" if default}).downcase" end def match_extraction(next_capture) if default "params[:#{key}] = match[#{next_capture}] ? match[#{next_capture}].downcase : '#{default}'" else "params[:#{key}] = match[#{next_capture}].downcase if match[#{next_capture}]" end end end class PathSegment < DynamicSegment #:nodoc: RESERVED_PCHAR = "#{Segment::RESERVED_PCHAR}/" UNSAFE_PCHAR = Regexp.new("[^#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}]", false, 'N').freeze def interpolation_chunk(value_code = "#{local_name}") "\#{URI.escape(#{value_code}.to_s, ActionController::Routing::PathSegment::UNSAFE_PCHAR)}" end def default '' end def default=(path) raise RoutingError, "paths cannot have non-empty default values" unless path.blank? end def match_extraction(next_capture) "params[:#{key}] = PathSegment::Result.new_escaped((match[#{next_capture}]#{" || " + default.inspect if default}).split('/'))#{" if match[" + next_capture + "]" if !default}" end def regexp_chunk regexp || "(.*)" end def optionality_implied? true end class Result < ::Array #:nodoc: def to_s() join '/' end def self.new_escaped(strings) new strings.collect {|str| URI.unescape str} end end end end end