Add JSON output to /api/0.6/capabilities

app/views/api/capabilities/show.json.jbuilder

@@ -0,0 +1,44 @@
+json.partial! "api/root_attributes"
+
+json.api do
+  json.version do
+    json.minimum Settings.api_version
+    json.maximum Settings.api_version
+  end
+  json.area do
+    json.maximum Settings.max_request_area
+  end
+  json.note_area do
+    json.maximum Settings.max_note_request_area
+  end
+  json.tracepoints do
+    json.per_page Settings.tracepoints_per_page
+  end
+  json.waynodes do
+    json.maximum Settings.max_number_of_way_nodes
+  end
+  json.relationmembers do
+    json.maximum Settings.max_number_of_relation_members
+  end
+  json.changesets do
+    json.maximum_elements Changeset::MAX_ELEMENTS
+    json.default_query_limit Settings.default_changeset_query_limit
+    json.maximum_query_limit Settings.max_changeset_query_limit
+  end
+  json.timeout do
+    json.seconds Settings.api_timeout
+  end
+  json.status do
+    json.database @database_status
+    json.api @api_status
+    json.gpx @gpx_status
+  end
+end
+
+json.policy do
+  json.imagery do
+    json.blacklist(Settings.imagery_blacklist) do |url_regex|
+      json.regex url_regex.to_s
+    end
+  end
+end

test/controllers/api/capabilities_controller_test.rb

@@ -9,6 +9,10 @@ module Api
         { :path => "/api/capabilities", :method => :get },
         { :controller => "api/capabilities", :action => "show" }
       )
+      assert_routing(
+        { :path => "/api/capabilities.json", :method => :get },
+        { :controller => "api/capabilities", :action => "show", :format => "json" }
+      )
       assert_recognizes(
         { :controller => "api/capabilities", :action => "show" },
         { :path => "/api/0.6/capabilities", :method => :get }
@@ -32,5 +36,28 @@ module Api
         end
       end
     end
+
+    def test_capabilities_json
+      get api_capabilities_path, :params => { :format => "json" }
+      assert_response :success
+      js = ActiveSupport::JSON.decode(@response.body)
+      assert_not_nil js
+
+      assert_equal Settings.api_version, js["version"]
+      assert_equal Settings.generator, js["generator"]
+      assert_equal Settings.api_version, js["api"]["version"]["minimum"]
+      assert_equal Settings.api_version, js["api"]["version"]["maximum"]
+      assert_equal Settings.max_request_area, js["api"]["area"]["maximum"]
+      assert_equal Settings.max_note_request_area, js["api"]["note_area"]["maximum"]
+      assert_equal Settings.tracepoints_per_page, js["api"]["tracepoints"]["per_page"]
+      assert_equal Changeset::MAX_ELEMENTS, js["api"]["changesets"]["maximum_elements"]
+      assert_equal Settings.default_changeset_query_limit, js["api"]["changesets"]["default_query_limit"]
+      assert_equal Settings.max_changeset_query_limit, js["api"]["changesets"]["maximum_query_limit"]
+      assert_equal Settings.max_number_of_relation_members, js["api"]["relationmembers"]["maximum"]
+      assert_equal "online", js["api"]["status"]["database"]
+      assert_equal "online", js["api"]["status"]["api"]
+      assert_equal "online", js["api"]["status"]["gpx"]
+      assert_equal Settings.imagery_blacklist.length, js["policy"]["imagery"]["blacklist"].length
+    end
   end
 end