feat: support plugins

plugins/event.py

@@ -0,0 +1,49 @@
+# encoding:utf-8
+
+from enum import Enum
+
+
+class Event(Enum):
+    # ON_RECEIVE_MESSAGE = 1  # 收到消息
+
+    ON_HANDLE_CONTEXT = 2   # 处理消息前
+    """
+    e_context = {  "channel": 消息channel, "context" : 本次消息的context, "reply" : 目前的回复，初始为空  }
+    """
+
+    ON_DECORATE_REPLY = 3   # 得到回复后准备装饰
+    """
+    e_context = {  "channel": 消息channel, "context" : 本次消息的context, "reply" : 目前的回复 }
+    """
+
+    ON_SEND_REPLY = 4       # 发送回复前
+    """
+    e_context = {  "channel": 消息channel, "context" : 本次消息的context, "reply" : 目前的回复 }
+    """
+
+    # AFTER_SEND_REPLY = 5    # 发送回复后
+
+
+class EventAction(Enum):
+    CONTINUE = 1            # 事件未结束，继续交给下个插件处理，如果没有下个插件，则交付给默认的事件处理逻辑
+    BREAK = 2               # 事件结束，不再给下个插件处理，交付给默认的事件处理逻辑
+    BREAK_PASS = 3          # 事件结束，不再给下个插件处理，不交付给默认的事件处理逻辑
+
+
+class EventContext:
+    def __init__(self, event, econtext=dict()):
+        self.event = event
+        self.econtext = econtext
+        self.action = EventAction.CONTINUE
+
+    def __getitem__(self, key):
+        return self.econtext[key]
+
+    def __setitem__(self, key, value):
+        self.econtext[key] = value
+
+    def __delitem__(self, key):
+        del self.econtext[key]
+
+    def is_pass(self):
+        return self.action == EventAction.BREAK_PASS