aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_dispatch/journey/routes.rb
blob: 3f055db66ded7d283a3d914f2d62c9d9c5f4f6e9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
# frozen_string_literal: true

module ActionDispatch
  module Journey # :nodoc:
    # The Routing table. Contains all routes for a system. Routes can be
    # added to the table by calling Routes#add_route.
    class Routes # :nodoc:
      include Enumerable

      attr_reader :routes, :custom_routes, :anchored_routes

      def initialize
        @routes             = []
        @ast                = nil
        @anchored_routes    = []
        @custom_routes      = []
        @simulator          = nil
      end

      def empty?
        routes.empty?
      end

      def length
        routes.length
      end
      alias :size :length

      def last
        routes.last
      end

      def each(&block)
        routes.each(&block)
      end

      def clear
        routes.clear
        anchored_routes.clear
        custom_routes.clear
      end

      def partition_route(route)
        if route.path.anchored && route.ast.grep(Nodes::Symbol).all?(&:default_regexp?)
          anchored_routes << route
        else
          custom_routes << route
        end
      end

      def ast
        @ast ||= begin
          asts = anchored_routes.map(&:ast)
          Nodes::Or.new(asts)
        end
      end

      def simulator
        @simulator ||= begin
          gtg = GTG::Builder.new(ast).transition_table
          GTG::Simulator.new(gtg)
        end
      end

      def add_route(name, mapping)
        route = mapping.make_route name, routes.length
        routes << route
        partition_route(route)
        clear_cache!
        route
      end

      private
        def clear_cache!
          @ast                = nil
          @simulator          = nil
        end
    end
  end
end