Allow passing regular expressions as match keys to react_room_messages

Also, make string matches case-insensitive

mytrix.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import ntptime
+import re
 import urequests
 from urllib.parse import urljoin
 
@@ -133,23 +134,32 @@ class Matrix:
     def react_room_messages(self, room, cases):
         """Get room messages and trigger callbacks.
 
-        The cases argument takes a dictionary mapping strings to callables. All received messages
-        are compared to the keys, and on match, the respective callable is called.
+        The cases argument takes a dictionary mapping strings or compiled regexs to callables.
+        All received messages are compared to the keys, and on match, the respective callable
+        is called. The callback is passed the matching message as only argument.
 
         The get_room_messages method is called with default values, resulting in this method always
         reacting to new messages since its last call.
 
-        The method returns True if any case matched; False if not.
+        The method returns a list of all matched messages.
         """
         data = self.get_room_messages(room)
+        matches = []
 
         for event in data.get("chunk", []):
             if event["type"] == "m.room.message" and event["content"]["msgtype"] == "m.text":
-                f = cases.get(event["content"]["body"], None)
-                if f is not None:
-                    f()
-                    return True
-        return False
+                message = event["content"]["body"]
+                for key_, func in cases.items():
+                    if isinstance(key_, str):
+                        if message.lower().strip() == key_.lower().strip():
+                            matches.append(message)
+                            func(message)
+                    elif isinstance(key_, re.Pattern):
+                        if key_.match(message):
+                            matches.append(message)
+                            func(message)
+
+        return matches
 
     def react_dm_messages(self, mxid, cases):
         """Get DM messages and trigger callbacks."""