Add alertmanager as supported sender and update deps

ops_bot/alertmanager.py

@@ -0,0 +1,57 @@
+import logging
+from typing import Any, Dict, List, Tuple
+
+from fastapi import Request
+
+from ops_bot.common import COLOR_ALARM, COLOR_OK, COLOR_UNKNOWN
+from ops_bot.config import RoutingKey
+
+
+def prometheus_alert_to_markdown(
+    alert_data: Dict,  # type: ignore[type-arg]
+) -> List[Tuple[str, str]]:
+    """
+    Converts a prometheus alert json to markdown
+    """
+    messages = []
+    known_labels = ["alertname", "instance", "job"]
+    for alert in alert_data["alerts"]:
+        title = (
+            alert["annotations"]["description"]
+            if hasattr(alert["annotations"], "description")
+            else alert["annotations"]["summary"]
+        )
+        severity = alert.get("severity", "critical")
+        if alert["status"] == "resolved":
+            color = COLOR_OK
+        elif severity == "critical":
+            color = COLOR_ALARM
+        else:
+            color = COLOR_UNKNOWN
+
+        status = alert["status"]
+        generatorURL = alert.get("generatorURL")
+        plain = f"{status}:  {title}"
+        header_str = f"{status.upper()}[{status}]"
+        formatted = f"<strong><font color={color}>{header_str}</font></strong>:  [{title}]({generatorURL})"
+        for label_name in known_labels:
+            try:
+                plain += "\n* **{0}**: {1}".format(
+                    label_name.capitalize(), alert["labels"][label_name]
+                )
+                formatted += "\n* **{0}**: {1}".format(
+                    label_name.capitalize(), alert["labels"][label_name]
+                )
+            except Exception as e:
+                logging.error("error parsing labels", exc_info=e)
+                pass
+        messages.append((plain, formatted))
+    return messages
+
+
+async def parse_alertmanager_event(
+    route: RoutingKey,
+    payload: Any,
+    request: Request,
+) -> List[Tuple[str, str]]:
+    return prometheus_alert_to_markdown(payload)