add plugin

README.md

@@ -5,9 +5,42 @@ Lightweight Telegram bot framework
 
 This framework is a simple wrapper for [go-telegram-bot-api](https://github.com/go-telegram-bot-api/telegram-bot-api), aiming to make the event processing easier.
 
-## Example
+## Quick Start
+> Here is a plugin-based example
+```go
+package main
 
-See under `example` folder or below.
+import (
+	rei "github.com/fumiama/ReiBot"
+	tgba "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+)
+
+func main() {
+	rei.OnMessagePrefix("echo").SetBlock(true).SecondPriority().
+		Handle(func(ctx *rei.Ctx) {
+			args := ctx.State["args"].(string)
+			if args == "" {
+				return
+			}
+			msg := ctx.Value.(*tgba.Message)
+			ctx.Caller.Send(tgba.NewMessage(msg.Chat.ID, args))
+		})
+	rei.Run(rei.Bot{
+		Token:  "",
+		Buffer: 256,
+		UpdateConfig: tgba.UpdateConfig{
+			Offset:  0,
+			Limit:   0,
+			Timeout: 60,
+		},
+		Debug: true,
+	})
+}
+```
+
+## Event-Based
+
+> If Handler in Bot is implemented, the plugin function will be disabled.
 
 ![example](https://user-images.githubusercontent.com/41315874/171180885-c888a031-7797-4b4b-a232-9ff23f031b32.png)
 
@@ -32,7 +65,7 @@ func main() {
 			Timeout: 60,
 		},
 		Debug: true,
-		Handler: rei.Handler{
+		Handler: &rei.Handler{
 			OnMessage: func(updateid int, bot *rei.TelegramClient, msg *tgba.Message) {
 				if len(msg.Text) <= len("测试") {
 					return
@@ -60,4 +93,4 @@ func main() {
 		},
 	})
 }
-```
+```