Add optional Discord webhook support

app/tasks/webhooktasks.py

@@ -0,0 +1,40 @@
+# ContentDB
+# Copyright (C) 2021 rubenwardy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from typing import Optional
+
+import requests
+
+from app import app
+from app.models import User
+from app.tasks import celery
+
+@celery.task()
+def post_discord_webhook(username: Optional[str], content: str, is_queue: bool):
+	discord_url = app.config.get("DISCORD_WEBHOOK_QUEUE" if is_queue else "DISCORD_WEBHOOK_FEED")
+	if discord_url is None:
+		return
+
+	json = {
+		"content": content,
+	}
+
+	if username:
+		json["username"] = username
+		user = User.query.filter_by(username=username).first()
+		if user:
+			json["avatar_url"] = user.getProfilePicURL().replace("/./", "/")
+
+	requests.post(discord_url, json=json)