add authorization policies

Introduce first-class policy helpers and composition through middleware

Normalize chat context for more updates and add regression coverage

Document the completed backlog item in changelog, TODO, and wiki

msg_handler.go

@@ -0,0 +1,117 @@
+package laniakea
+
+import (
+	"strings"
+
+	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
+)
+
+func (bot *Bot[T]) handleMessage(update *tgapi.Update, ctx *MsgContext) {
+	var msg *tgapi.Message
+	if update.Message != nil {
+		msg = update.Message
+	} else if update.ChannelPost != nil {
+		msg = update.ChannelPost
+	} else {
+		return
+	}
+
+	var text string
+	if len(msg.Text) > 0 {
+		text = msg.Text
+	} else if len(msg.Caption) > 0 {
+		text = msg.Caption
+	} else {
+		return
+	}
+
+	prefix, cmd, args := bot.parseCommand(text)
+	if cmd == "" {
+		return
+	}
+	ctx.Prefix = prefix
+
+	if strings.Contains(cmd, "@") {
+		botUsername := bot.username
+		if botUsername != "" && strings.HasSuffix(cmd, "@"+botUsername) {
+			cmd = cmd[:len(cmd)-len("@"+botUsername)] // убираем @botname
+		}
+	}
+
+	// Ищем команду по точному совпадению
+	for _, plugin := range bot.plugins {
+		if _, exists := plugin.commands[cmd]; exists {
+			ctx.Text = args
+			ctx.Args = strings.Fields(args) // Убирает лишние пробелы
+
+			if plugin.logger != nil {
+				ctx.Logger = plugin.logger
+			}
+			if !plugin.executeMiddlewares(ctx, bot.appData) {
+				return
+			}
+			plugin.executeCmd(cmd, ctx, bot.appData)
+			return
+		}
+	}
+}
+
+func (bot *Bot[T]) handleCallback(update *tgapi.Update, ctx *MsgContext) {
+	data, err := bot.decodePayload(update.CallbackQuery.Data)
+	if err != nil {
+		bot.logger.Errorln(err)
+		return
+	}
+
+	ctx.Args = data.Args
+
+	for _, plugin := range bot.plugins {
+		_, ok := plugin.payloads[data.Command]
+		if !ok {
+			continue
+		}
+
+		ctx.Logger = plugin.logger
+		if ctx.Logger == nil {
+			ctx.Logger = bot.logger
+		}
+		if !plugin.executeMiddlewares(ctx, bot.appData) {
+			return
+		}
+		plugin.executePayload(data.Command, ctx, bot.appData)
+		return
+	}
+}
+
+func (bot *Bot[T]) checkPrefixes(text string) (string, bool) {
+	for _, prefix := range bot.prefixes {
+		if prefix == "" {
+			if bot.logger != nil {
+				bot.logger.Warnln("empty prefix is not allowed")
+			}
+			continue
+		}
+		if strings.HasPrefix(text, prefix) {
+			return prefix, true
+		}
+	}
+	return "", false
+}
+
+func (bot *Bot[T]) parseCommand(text string) (prefix, cmd, args string) {
+	if prefix, hasPrefix := bot.checkPrefixes(text); hasPrefix {
+		text = strings.TrimSpace(text[len(prefix):])
+		spaceIndex := strings.Index(text, " ")
+		var cmd string
+		var args string
+		if spaceIndex == -1 {
+			cmd = text
+			args = ""
+		} else {
+			cmd = text[:spaceIndex]
+			args = strings.TrimSpace(text[spaceIndex:])
+		}
+		return prefix, cmd, args
+	}
+	return "", "", ""
+}