Add group_alerts setting for per-run summary notifications

Allow choosing between one alert per item (default) and one grouped summary alert per run when any items need attention via general.group_alerts.

README.md

@@ -59,6 +59,7 @@ There are two config files. Both are ignored by git, so your values stay on your
 | --- | --- | --- |
 | `general.realert_hours` | `12` | Hours before an open item is alerted again. `0` turns repeats off. |
 | `general.notify_cleared` | `true` | Send a message when an item is cleared. |
+| `general.group_alerts` | `false` | `false`: one alert per item. `true`: one summary alert per run when anything needs attention. |
 | `general.request_timeout` | `15` | Seconds to wait for each HTTP request. |
 | `general.state_file` | `state.db` | Where the alert history is stored. |
 | `general.notifiers` | `["fluxer"]` | Notifiers to use. |

config.example.toml

@@ -9,6 +9,9 @@ realert_hours = 12
 # Send a message when an item is no longer open (cleared in the admin UI).
 notify_cleared = true
 
+# Send one alert per item (false) or one summary alert per run when anything needs attention (true).
+group_alerts = false
+
 # Timeout in seconds for each request to the Fluxer API or webhook.
 request_timeout = 15
 

config.py

@@ -38,6 +38,7 @@ class Settings:
     request_timeout: float
     realert: timedelta | None
     notify_cleared: bool
+    group_alerts: bool
     state_file: Path
     notifiers: tuple[str, ...]
     fluxer_webhook_url: str | None
@@ -90,6 +91,7 @@ def load_settings(config_path: Path) -> Settings:
         request_timeout=float(general.get("request_timeout", 15)),
         realert=timedelta(hours=realert_hours) if realert_hours > 0 else None,
         notify_cleared=bool(general.get("notify_cleared", True)),
+        group_alerts=bool(general.get("group_alerts", False)),
         state_file=PROJECT_ROOT / str(general.get("state_file", "state.db")),
         notifiers=notifiers,
         fluxer_webhook_url=fluxer_webhook_url,

runner.py

@@ -30,6 +30,23 @@ def _to_message(notice: Notice, admin_ui_url: str) -> Message:
     )
 
 
+def _group_messages(notices: list[Notice], admin_ui_url: str) -> list[Message]:
+    if not notices:
+        return []
+    lines: list[str] = []
+    urgent = False
+    for notice in notices:
+        label = KIND_PREFIX[notice.kind]
+        detail = notice.detail.replace("\n", " / ")
+        lines.append(f"{label}: {notice.title} - {detail}")
+        urgent = urgent or notice.urgent
+    title = f"Admin alerts: {len(notices)} item{'s' if len(notices) != 1 else ''} need attention"
+    body = "\n".join(lines)
+    if len(body) > 4000:
+        body = body[:3997] + "..."
+    return [Message(title=title, body=body, link=admin_ui_url, urgent=urgent)]
+
+
 def run(settings: Settings, dry_run: bool = False) -> int:
     api = FluxerAPI(settings.api_url, settings.api_key, settings.request_timeout)
     now = datetime.now(timezone.utc)
@@ -57,6 +74,9 @@ def run(settings: Settings, dry_run: bool = False) -> int:
     try:
         known = store.load()
         plan = decide(now, seen, known, checked, settings.realert, settings.notify_cleared)
+        if settings.group_alerts:
+            messages = _group_messages(plan.notices, settings.admin_ui_url)
+        else:
             messages = [_to_message(n, settings.admin_ui_url) for n in plan.notices]
 
         if dry_run: