refactor: auto-discover channels via pkgutil, eliminate hardcoded registry

nanobot/channels/manager.py

@@ -31,135 +31,23 @@ class ChannelManager:
         self._init_channels()
 
     def _init_channels(self) -> None:
-        """Initialize channels based on config."""
+        """Initialize channels discovered via pkgutil scan."""
+        from nanobot.channels.registry import discover_channel_names, load_channel_class
 
-        # Telegram channel
-        if self.config.channels.telegram.enabled:
+        groq_key = self.config.providers.groq.api_key
+
+        for modname in discover_channel_names():
+            section = getattr(self.config.channels, modname, None)
+            if not section or not getattr(section, "enabled", False):
+                continue
             try:
-                from nanobot.channels.telegram import TelegramChannel
-                self.channels["telegram"] = TelegramChannel(
-                    self.config.channels.telegram,
-                    self.bus,
-                    groq_api_key=self.config.providers.groq.api_key,
-                )
-                logger.info("Telegram channel enabled")
+                cls = load_channel_class(modname)
+                channel = cls(section, self.bus)
+                channel.transcription_api_key = groq_key
+                self.channels[modname] = channel
+                logger.info("{} channel enabled", cls.display_name)
             except ImportError as e:
-                logger.warning("Telegram channel not available: {}", e)
-
-        # WhatsApp channel
-        if self.config.channels.whatsapp.enabled:
-            try:
-                from nanobot.channels.whatsapp import WhatsAppChannel
-                self.channels["whatsapp"] = WhatsAppChannel(
-                    self.config.channels.whatsapp, self.bus
-                )
-                logger.info("WhatsApp channel enabled")
-            except ImportError as e:
-                logger.warning("WhatsApp channel not available: {}", e)
-
-        # Discord channel
-        if self.config.channels.discord.enabled:
-            try:
-                from nanobot.channels.discord import DiscordChannel
-                self.channels["discord"] = DiscordChannel(
-                    self.config.channels.discord, self.bus
-                )
-                logger.info("Discord channel enabled")
-            except ImportError as e:
-                logger.warning("Discord channel not available: {}", e)
-
-        # Feishu channel
-        if self.config.channels.feishu.enabled:
-            try:
-                from nanobot.channels.feishu import FeishuChannel
-                self.channels["feishu"] = FeishuChannel(
-                    self.config.channels.feishu, self.bus,
-                    groq_api_key=self.config.providers.groq.api_key,
-                )
-                logger.info("Feishu channel enabled")
-            except ImportError as e:
-                logger.warning("Feishu channel not available: {}", e)
-
-        # Mochat channel
-        if self.config.channels.mochat.enabled:
-            try:
-                from nanobot.channels.mochat import MochatChannel
-
-                self.channels["mochat"] = MochatChannel(
-                    self.config.channels.mochat, self.bus
-                )
-                logger.info("Mochat channel enabled")
-            except ImportError as e:
-                logger.warning("Mochat channel not available: {}", e)
-
-        # DingTalk channel
-        if self.config.channels.dingtalk.enabled:
-            try:
-                from nanobot.channels.dingtalk import DingTalkChannel
-                self.channels["dingtalk"] = DingTalkChannel(
-                    self.config.channels.dingtalk, self.bus
-                )
-                logger.info("DingTalk channel enabled")
-            except ImportError as e:
-                logger.warning("DingTalk channel not available: {}", e)
-
-        # Email channel
-        if self.config.channels.email.enabled:
-            try:
-                from nanobot.channels.email import EmailChannel
-                self.channels["email"] = EmailChannel(
-                    self.config.channels.email, self.bus
-                )
-                logger.info("Email channel enabled")
-            except ImportError as e:
-                logger.warning("Email channel not available: {}", e)
-
-        # Slack channel
-        if self.config.channels.slack.enabled:
-            try:
-                from nanobot.channels.slack import SlackChannel
-                self.channels["slack"] = SlackChannel(
-                    self.config.channels.slack, self.bus
-                )
-                logger.info("Slack channel enabled")
-            except ImportError as e:
-                logger.warning("Slack channel not available: {}", e)
-
-        # QQ channel
-        if self.config.channels.qq.enabled:
-            try:
-                from nanobot.channels.qq import QQChannel
-                self.channels["qq"] = QQChannel(
-                    self.config.channels.qq,
-                    self.bus,
-                )
-                logger.info("QQ channel enabled")
-            except ImportError as e:
-                logger.warning("QQ channel not available: {}", e)
-
-        # Matrix channel
-        if self.config.channels.matrix.enabled:
-            try:
-                from nanobot.channels.matrix import MatrixChannel
-                self.channels["matrix"] = MatrixChannel(
-                    self.config.channels.matrix,
-                    self.bus,
-                )
-                logger.info("Matrix channel enabled")
-            except ImportError as e:
-                logger.warning("Matrix channel not available: {}", e)
-
-        # WeCom channel
-        if self.config.channels.wecom.enabled:
-            try:
-                from nanobot.channels.wecom import WecomChannel
-                self.channels["wecom"] = WecomChannel(
-                    self.config.channels.wecom,
-                    self.bus,
-                )
-                logger.info("WeCom channel enabled")
-            except ImportError as e:
-                logger.warning("WeCom channel not available: {}", e)
+                logger.warning("{} channel not available: {}", modname, e)
 
         self._validate_allow_from()