activity: basic webhook alerts for automation failures

app/models/__init__.py

@@ -38,6 +38,13 @@ class AbstractResource(db.Model):
     deprecation_reason = db.Column(db.String(), nullable=True)
     destroyed = db.Column(db.DateTime(), nullable=True)
 
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        if self.added is None:
+            self.added = datetime.utcnow()
+        if self.updated is None:
+            self.updated = datetime.utcnow()
+
     def deprecate(self, *, reason: str):
         self.deprecated = datetime.utcnow()
         self.deprecation_reason = reason

app/models/activity.py

@@ -0,0 +1,46 @@
+import datetime
+
+import requests
+
+from app.models import AbstractConfiguration
+from app.extensions import db
+
+
+class Activity(db.Model):
+    id = db.Column(db.Integer(), primary_key=True)
+    group_id = db.Column(db.Integer(), nullable=True)
+    activity_type = db.Column(db.String(20), nullable=False)
+    text = db.Column(db.Text(), nullable=False)
+    added = db.Column(db.DateTime(), nullable=False)
+
+    def __init__(self, **kwargs):
+        if type(kwargs["activity_type"]) != str or len(kwargs["activity_type"]) > 20 or kwargs["activity_type"] == "":
+            raise TypeError("expected string for activity type between 1 and 20 characters")
+        if type(kwargs["text"]) != str:
+            raise TypeError("expected string for text")
+        if "added" not in kwargs:
+            kwargs["added"] = datetime.datetime.utcnow()
+        super().__init__(**kwargs)
+
+    def notify(self) -> int:
+        count = 0
+        hooks = Webhook.query.filter(
+            Webhook.destroyed == None
+        )
+        for hook in hooks:
+            hook.send(self.text)
+            count += 1
+        return count
+
+
+class Webhook(AbstractConfiguration):
+    format = db.Column(db.String(20))
+    url = db.Column(db.String(255))
+
+    def send(self, text: str):
+        if self.format == "telegram":
+            data = {"text": text}
+        else:
+            # Matrix as default
+            data = {"body": text}
+        r = requests.post(self.url, json=data)