💡 Added login example

login/example_test.go

@@ -0,0 +1,42 @@
+package login_test
+
+import (
+	"log"
+
+	httprouter "github.com/buaazp/fasthttprouter"
+	http "github.com/valyala/fasthttp"
+	"gitlab.com/toby3d/telegram/login"
+)
+
+func Example_fastStart() {
+	// We use bot AccessToken from @BotFather or telegram.Bot structure
+	botAccessToken := "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11"
+
+	// Create example server with example callback handler
+	r := httprouter.New()
+	r.GET("/callback", func(ctx *http.RequestCtx) {
+		defer ctx.SetConnectionClose()
+
+		// You not need decode data to User structure if you want only
+		// validate it
+		u, err := login.ParseUser(ctx.QueryArgs())
+		if err != nil {
+			ctx.Error("bad request", http.StatusBadRequest)
+			return
+		}
+
+		// Check User structure
+		ok, err := login.CheckAuthorization(u, botAccessToken)
+		if err != nil || !ok { // NANI!? It's a invalid data!
+			ctx.Error("bad request", http.StatusBadRequest)
+			return
+		}
+
+		// All is ok! Hello, human!
+		ctx.Success("text/html", []byte("hello, "+u.FullName()+"!"))
+	})
+
+	if err := http.ListenAndServe(":8000", r.Handler); err != nil {
+		log.Fatalln(err.Error())
+	}
+}