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src/langbot/pkg/workflow/nodes/message_trigger.py

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+"""Message Trigger Node - triggers workflow on message arrival
+
+This module contains the implementation for the Message Trigger workflow node.
+Node metadata (label, description, inputs, outputs, config) is loaded from:
+../../templates/metadata/nodes/message_trigger.yaml
+"""
+
+from __future__ import annotations
+
+from typing import Any, ClassVar
+
+from ..entities import ExecutionContext
+from ..node import WorkflowNode, workflow_node, NodePort, NodeConfig
+
+
+@workflow_node('message_trigger')
+class MessageTriggerNode(WorkflowNode):
+    """Message trigger node - triggers workflow on message arrival"""
+
+    type_name = "message_trigger"
+    category = "trigger"
+    icon = "💬"
+    name = "message_trigger"
+    description = "message_trigger"
+    name_zh = "消息触发"
+    name_en = "Message Trigger"
+    description_zh = "当收到消息时触发工作流"
+    description_en = "Trigger workflow when a message is received"
+    
+    inputs: ClassVar[list[NodePort]] = []
+    outputs: ClassVar[list[NodePort]] = []
+    config_schema: ClassVar[list[NodeConfig]] = []
+
+    async def execute(self, inputs: dict[str, Any], context: ExecutionContext) -> dict[str, Any]:
+        msg_ctx = context.message_context
+        
+        if msg_ctx:
+            return {
+                "message": msg_ctx.message_content,
+                "sender_id": msg_ctx.sender_id,
+                "sender_name": msg_ctx.sender_name,
+                "platform": msg_ctx.platform,
+                "conversation_id": msg_ctx.conversation_id,
+                "is_group": msg_ctx.is_group,
+                "context": msg_ctx.model_dump(),
+            }
+        
+        return {
+            "message": context.get_variable("message", ""),
+            "sender_id": context.get_variable("sender_id", ""),
+            "sender_name": context.get_variable("sender_name", ""),
+            "platform": context.get_variable("platform", ""),
+            "conversation_id": context.get_variable("conversation_id", ""),
+            "is_group": context.get_variable("is_group", False),
+            "context": context.trigger_data,
+        }