Support groups

signal_webhook/configuration.sample.py

@@ -1,4 +1,5 @@
-# Signal 'address book'
+# Signal 'address book'. Refer to groups with `G:[base64_encoded_group_id]`, eg.
+# `G:UGVyZHUgIQo=`.
 RECIPIENTS = {"foo": ["+42..."]}  # FIXME
 
 # Recipient from the dict above to send to by default

signal_webhook/signal.py

@@ -8,15 +8,18 @@ logger = logging.getLogger(__name__)
 
 
 def signal_send(recipients: list[str], message: str) -> None:
+    def to_dest(recipient: str) -> dict[str, str]:
+        if recipient.startswith("G:"):
+            return {"groupId": recipient[2:]}
+        return {"userId": recipient}
+
+    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as signal_json:
+        signal_json.connect(configuration.SIGNAL_SOCKET)
+        for recipient in recipients:
             payload = {
                 "jsonrpc": "2.0",
                 "method": "send",
-        "params": {
-            "message": message,
-            "recipient": recipients,
-        },
+                "params": {"message": message, **to_dest(recipient)},
                 "id": random.randint(0, (1 << 24)),
             }
-    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as signal_json:
-        signal_json.connect(configuration.SIGNAL_SOCKET)
             signal_json.send(json.dumps(payload).encode("utf-8"))