Add websocket filewatcher

maputnik.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
+	"github.com/maputnik/desktop/filewatch"
 	"github.com/urfave/cli"
 )
 
@@ -14,11 +15,39 @@ func main() {
 	app.Name = "maputnik"
 	app.Usage = "Server for integrating Maputnik locally"
 
+	app.Flags = []cli.Flag{
+		cli.StringFlag{
+			Name:  "file, f",
+			Usage: "Allow access to JSON style from web client",
+		},
+		cli.BoolFlag{
+			Name:  "watch",
+			Usage: "Notify web client about JSON style file changes",
+		},
+	}
+
 	app.Action = func(c *cli.Context) error {
 		gui := http.FileServer(assetFS())
 
 		router := mux.NewRouter().StrictSlash(true)
-		//router.Path("/api/v1/apps").Methods("GET").HandlerFunc(foo)
+
+		// Register websocket to notify we clients about file changes
+		filename := c.String("file")
+
+		if filename != "" {
+			/*
+				router.Path("/files").Methods("GET").HandlerFunc(listFiles)
+				router.Path("/files/{filename}").Methods("PUT").HandlerFunc(saveFile)
+			*/
+
+			if c.Bool("watch") {
+				router.Path("/ws").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+					filewatch.ServeWebsocketFileWatcher(filename, w, r)
+				})
+			}
+
+		}
+
 		router.PathPrefix("/").Handler(http.StripPrefix("/", gui))
 
 		loggedRouter := handlers.LoggingHandler(os.Stdout, router)