Update to use jsonrpc

README.md

@@ -5,7 +5,7 @@ Provide ways to send notifications to signal-cli through webhooks
 ## Install
 
 ```bash
-virtualenv -p python3 --system-site-packages venv
+virtualenv -p python3 venv
 source venv/bin/activate
 pip install -r requirements.txt
 
@@ -13,6 +13,3 @@ pip install -r requirements.txt
 cp signal_webhook/configuration.sample.py signal_webhook/configuration.py
 $EDITOR signal_webhook/configuration.py
 ```
-
-**Beware!** Sending messages to Signal requires `gi`, which cannot be installed
-in a virtualenv; hence the need for `--system-site-packages`.

requirements.txt

@@ -1,2 +1 @@
 Flask
-pydbus

signal_webhook/configuration.sample.py

@@ -3,3 +3,6 @@ RECIPIENTS = {"foo": ["+42..."]}  # FIXME
 
 # Recipient from the dict above to send to by default
 DEFAULT_RECIPIENT = "foo"  # FIXME
+
+# Unix socket location
+SIGNAL_SOCKET = "/run/signal-cli/socket"

signal_webhook/signal.py

@@ -1,19 +1,22 @@
 import logging
-from pydbus import SystemBus
-from gi.repository.GLib import GError
+from . import configuration
+import socket
+import random
+import json
 
 logger = logging.getLogger(__name__)
 
 
 def signal_send(recipients: list[str], message: str) -> None:
-    try:
-        bus = SystemBus()
-        signal_bus = bus.get("org.asamk.Signal")
-        for recipient in recipients:
-            signal_bus.sendMessage(
-                message,
-                [],
-                recipient,
-            )
-    except GError as exn:
-        logger.error("Cannot send Signal notification: %s", exn)
+    payload = {
+        "jsonrpc": "2.0",
+        "method": "send",
+        "params": {
+            "message": message,
+            "recipient": recipients,
+        },
+        "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"))