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|
# frozen_string_literal: true
# :markup: markdown
require "action_dispatch/journey/visitors"
module ActionDispatch
module Journey # :nodoc:
class Ast # :nodoc:
attr_reader :names, :path_params, :tree, :wildcard_options, :terminals
alias :root :tree
def initialize(tree, formatted)
@tree = tree
@path_params = []
@names = []
@symbols = []
@stars = []
@terminals = []
@wildcard_options = {}
visit_tree(formatted)
end
def requirements=(requirements)
# inject any regexp requirements for `star` nodes so they can be determined
# nullable, which requires knowing if the regex accepts an empty string.
(symbols + stars).each do |node|
re = requirements[node.to_sym]
node.regexp = re if re
end
end
def route=(route)
terminals.each { |n| n.memo = route }
end
def glob?
stars.any?
end
private
attr_reader :symbols, :stars
def visit_tree(formatted)
tree.each do |node|
if node.symbol?
path_params << node.to_sym
names << node.name
symbols << node
elsif node.star?
stars << node
if formatted != false
# Add a constraint for wildcard route to make it non-greedy and match the
# optional format part of the route by default.
wildcard_options[node.name.to_sym] ||= /.+?/m
end
end
if node.terminal?
terminals << node
end
end
end
end
module Nodes # :nodoc:
class Node # :nodoc:
include Enumerable
attr_accessor :left, :memo
def initialize(left)
@left = left
@memo = nil
end
def each(&block)
Visitors::Each::INSTANCE.accept(self, block)
end
def to_s
Visitors::String::INSTANCE.accept(self, "")
end
def to_dot
Visitors::Dot::INSTANCE.accept(self)
end
def to_sym
name.to_sym
end
def name
-left.tr("*:", "")
end
def type
raise NotImplementedError
end
def symbol?; false; end
def literal?; false; end
def terminal?; false; end
def star?; false; end
def cat?; false; end
def group?; false; end
end
class Terminal < Node # :nodoc:
alias :symbol :left
def terminal?; true; end
end
class Literal < Terminal # :nodoc:
def literal?; true; end
def type; :LITERAL; end
end
class Dummy < Literal # :nodoc:
def initialize(x = Object.new)
super
end
def literal?; false; end
end
class Slash < Terminal # :nodoc:
def type; :SLASH; end
end
class Dot < Terminal # :nodoc:
def type; :DOT; end
end
class Symbol < Terminal # :nodoc:
attr_accessor :regexp
alias :symbol :regexp
attr_reader :name
DEFAULT_EXP = /[^.\/?]+/
GREEDY_EXP = /(.+)/
def initialize(left, regexp = DEFAULT_EXP)
super(left)
@regexp = regexp
@name = -left.tr("*:", "")
end
def type; :SYMBOL; end
def symbol?; true; end
end
class Unary < Node # :nodoc:
def children; [left] end
end
class Group < Unary # :nodoc:
def type; :GROUP; end
def group?; true; end
end
class Star < Unary # :nodoc:
attr_accessor :regexp
def initialize(left)
super(left)
# By default wildcard routes are non-greedy and must match something.
@regexp = /.+?/m
end
def star?; true; end
def type; :STAR; end
def name
left.name.tr "*:", ""
end
end
class Binary < Node # :nodoc:
attr_accessor :right
def initialize(left, right)
super(left)
@right = right
end
def children; [left, right] end
end
class Cat < Binary # :nodoc:
def cat?; true; end
def type; :CAT; end
end
class Or < Node # :nodoc:
attr_reader :children
def initialize(children)
@children = children
end
def type; :OR; end
end
end
end
end
|
