api: further improvement of the modular API changes

Signed-off-by: Ron Evans <ron@hybridgroup.com>

api/api.go

@@ -100,9 +100,8 @@ func (a *API) AddHandler(f func(http.ResponseWriter, *http.Request)) {
 	a.handlers = append(a.handlers, f)
 }
 
-// Start initializes the api by setting up c3pio routes and robeaux
+// Start initializes the api by setting up Robeaux web interface.
 func (a *API) Start() {
-	a.AddC3PIORoutes()
 	a.AddRobeauxRoutes()
 
 	a.start(a)
@@ -114,6 +113,9 @@ func (a *API) StartRaw() {
 }
 
 // AddC3PIORoutes adds all of the standard C3PIO routes to the API.
+// For more information, please see:
+// http://cppp.io/
+//
 func (a *API) AddC3PIORoutes() {
 	mcpCommandRoute := "/api/commands/:command"
 	robotDeviceCommandRoute := "/api/robots/:robot/devices/:device/commands/:command"
@@ -139,7 +141,11 @@ func (a *API) AddC3PIORoutes() {
 }
 
 // AddRobeauxRoutes adds all of the robeaux web interface routes to the API.
+// The Robeaux web interface requires the C3PIO API, so it is also
+// activated when you call this method.
 func (a *API) AddRobeauxRoutes() {
+	a.AddC3PIORoutes()
+
 	a.Get("/", func(res http.ResponseWriter, req *http.Request) {
 		http.Redirect(res, req, "/index.html", http.StatusMovedPermanently)
 	})

examples/hello_api_custom.go

@@ -16,6 +16,8 @@ func main() {
 	master := gobot.NewMaster()
 
 	a := api.NewAPI(master)
+
+	// creates routes/handlers for the custom API
 	a.Get("/", func(res http.ResponseWriter, req *http.Request) {
 		res.Write([]byte("OK"))
 	})
@@ -23,6 +25,8 @@ func main() {
 		msg := fmt.Sprintf("This command is attached to the robot %v", master.Robot("hello").Name)
 		res.Write([]byte(msg))
 	})
+
+	// starts the API without the "standard" C2PIO API or Robeaux web interface.
 	a.StartRaw()
 
 	master.AddRobot(gobot.NewRobot("hello"))

examples/hello_api_video.go

@@ -29,8 +29,12 @@ func main() {
 	master := gobot.NewMaster()
 
 	a := api.NewAPI(master)
+
+	// add the standard C3PIO API routes manually.
 	a.AddC3PIORoutes()
-	a.AddRobeauxRoutes()
+
+	// starts the API without adding the Robeaux web interface. However, since the C3PIO API was
+	// already added manually above, that will be available.
 	a.StartRaw()
 
 	hello := master.AddRobot(gobot.NewRobot("hello"))
@@ -49,13 +53,11 @@ func main() {
 
 	// create the mjpeg stream
 	stream = mjpeg.NewStream()
+	http.Handle("/video", stream)
 
 	// start capturing
 	go mjpegCapture()
 
-	// handle video stream
-	http.Handle("/video", stream)
-
 	master.Start()
 }