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:
def interpolation_chunk(value_code = "#{local_name}")
"\#{#{value_code}}"
end
def extract_value
"#{local_name} = hash[:#{key}] && Array(hash[:#{key}]).collect { |path_component| URI.escape(path_component.to_param, ActionController::Routing::Segment::UNSAFE_PCHAR) }.to_param #{"|| #{default.inspect}" if default}"
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
