aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_dispatch/routing/inspector.rb
blob: b91ffb8419dc5c56806855eba7d1bbf57ca7bf8e (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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
require "delegate"
require "active_support/core_ext/string/strip"

module ActionDispatch
  module Routing
    class RouteWrapper < SimpleDelegator
      def endpoint
        app.dispatcher? ? "#{controller}##{action}" : rack_app.inspect
      end

      def constraints
        requirements.except(:controller, :action)
      end

      def rack_app
        app.app
      end

      def path
        super.spec.to_s
      end

      def name
        super.to_s
      end

      def reqs
        @reqs ||= begin
          reqs = endpoint
          reqs += " #{constraints}" unless constraints.empty?
          reqs
        end
      end

      def controller
        parts.include?(:controller) ? ":controller" : requirements[:controller]
      end

      def action
        parts.include?(:action) ? ":action" : requirements[:action]
      end

      def internal?
        internal
      end

      def engine?
        rack_app.respond_to?(:routes)
      end
    end

    ##
    # This class is just used for displaying route information when someone
    # executes `rails routes` or looks at the RoutingError page.
    # People should not use this class.
    class RoutesInspector # :nodoc:
      def initialize(routes)
        @engines = {}
        @routes = routes
      end

      def format(formatter, filter = nil)
        routes_to_display = filter_routes(normalize_filter(filter))
        routes = collect_routes(routes_to_display)
        if routes.none?
          formatter.no_routes(collect_routes(@routes))
          return formatter.result
        end

        formatter.header routes
        formatter.section routes

        @engines.each do |name, engine_routes|
          formatter.section_title "Routes for #{name}"
          formatter.section engine_routes
        end

        formatter.result
      end

      private

        def normalize_filter(filter)
          if filter.is_a?(Hash) && filter[:controller]
            { controller: /#{filter[:controller].downcase.sub(/_?controller\z/, '').sub('::', '/')}/ }
          elsif filter
            { controller: /#{filter}/, action: /#{filter}/, verb: /#{filter}/, name: /#{filter}/, path: /#{filter}/ }
          end
        end

        def filter_routes(filter)
          if filter
            @routes.select do |route|
              route_wrapper = RouteWrapper.new(route)
              filter.any? { |default, value| route_wrapper.send(default) =~ value }
            end
          else
            @routes
          end
        end

        def collect_routes(routes)
          routes.collect do |route|
            RouteWrapper.new(route)
          end.reject(&:internal?).collect do |route|
            collect_engine_routes(route)

            { name: route.name,
              verb: route.verb,
              path: route.path,
              reqs: route.reqs }
          end
        end

        def collect_engine_routes(route)
          name = route.endpoint
          return unless route.engine?
          return if @engines[name]

          routes = route.rack_app.routes
          if routes.is_a?(ActionDispatch::Routing::RouteSet)
            @engines[name] = collect_routes(routes.routes)
          end
        end
    end

    class ConsoleFormatter
      def initialize
        @buffer = []
      end

      def result
        @buffer.join("\n")
      end

      def section_title(title)
        @buffer << "\n#{title}:"
      end

      def section(routes)
        @buffer << draw_section(routes)
      end

      def header(routes)
        @buffer << draw_header(routes)
      end

      def no_routes(routes)
        @buffer <<
        if routes.none?
          <<-MESSAGE.strip_heredoc
          You don't have any routes defined!

          Please add some routes in config/routes.rb.
          MESSAGE
        else
          "No routes were found for this controller"
        end
        @buffer << "For more information about routes, see the Rails guide: http://guides.rubyonrails.org/routing.html."
      end

      private
        def draw_section(routes)
          header_lengths = ["Prefix", "Verb", "URI Pattern"].map(&:length)
          name_width, verb_width, path_width = widths(routes).zip(header_lengths).map(&:max)

          routes.map do |r|
            "#{r[:name].rjust(name_width)} #{r[:verb].ljust(verb_width)} #{r[:path].ljust(path_width)} #{r[:reqs]}"
          end
        end

        def draw_header(routes)
          name_width, verb_width, path_width = widths(routes)

          "#{"Prefix".rjust(name_width)} #{"Verb".ljust(verb_width)} #{"URI Pattern".ljust(path_width)} Controller#Action"
        end

        def widths(routes)
          [routes.map { |r| r[:name].length }.max || 0,
           routes.map { |r| r[:verb].length }.max || 0,
           routes.map { |r| r[:path].length }.max || 0]
        end
    end

    class HtmlTableFormatter
      def initialize(view)
        @view = view
        @buffer = []
      end

      def section_title(title)
        @buffer << %(<tr><th colspan="4">#{title}</th></tr>)
      end

      def section(routes)
        @buffer << @view.render(partial: "routes/route", collection: routes)
      end

      # the header is part of the HTML page, so we don't construct it here.
      def header(routes)
      end

      def no_routes(*)
        @buffer << <<-MESSAGE.strip_heredoc
          <p>You don't have any routes defined!</p>
          <ul>
            <li>Please add some routes in <tt>config/routes.rb</tt>.</li>
            <li>
              For more information about routes, please see the Rails guide
              <a href="http://guides.rubyonrails.org/routing.html">Rails Routing from the Outside In</a>.
            </li>
          </ul>
          MESSAGE
      end

      def result
        @view.raw @view.render(layout: "routes/table") {
          @view.raw @buffer.join("\n")
        }
      end
    end
  end
end