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package notify
import (
"encoding/json"
"fmt"
"log/slog"
webpush "github.com/SherClockHolmes/webpush-go"
"github.com/thepeterstone/claudomator/internal/storage"
)
// PushSubscriptionStore is the minimal storage interface needed by WebPushNotifier.
type PushSubscriptionStore interface {
ListPushSubscriptions() ([]storage.PushSubscription, error)
}
// WebPushNotifier sends web push notifications to all registered subscribers.
type WebPushNotifier struct {
Store PushSubscriptionStore
VAPIDPublicKey string
VAPIDPrivateKey string
VAPIDEmail string
Logger *slog.Logger
}
// notificationContent derives urgency, title, body, and tag from a notify Event.
// Exported only for tests; use lowercase in production code via this same file.
func notificationContent(ev Event) (urgency, title, body, tag string) {
tag = "task-" + ev.TaskID
switch ev.Status {
case "BLOCKED":
urgency = "urgent"
title = "Needs input"
body = fmt.Sprintf("%s is waiting for your response", ev.TaskName)
case "FAILED", "BUDGET_EXCEEDED", "TIMED_OUT":
urgency = "high"
title = "Task failed"
if ev.Error != "" {
body = fmt.Sprintf("%s failed: %s", ev.TaskName, ev.Error)
} else {
body = fmt.Sprintf("%s failed", ev.TaskName)
}
case "COMPLETED":
urgency = "low"
title = "Task done"
body = fmt.Sprintf("%s completed ($%.2f)", ev.TaskName, ev.CostUSD)
default:
urgency = "normal"
title = "Task update"
body = fmt.Sprintf("%s: %s", ev.TaskName, ev.Status)
}
return
}
// Notify sends a web push notification to all registered subscribers.
func (n *WebPushNotifier) Notify(ev Event) error {
subs, err := n.Store.ListPushSubscriptions()
if err != nil {
return fmt.Errorf("listing push subscriptions: %w", err)
}
if len(subs) == 0 {
return nil
}
urgency, title, body, tag := notificationContent(ev)
payload := map[string]string{
"title": title,
"body": body,
"tag": tag,
}
data, err := json.Marshal(payload)
if err != nil {
return fmt.Errorf("marshaling push payload: %w", err)
}
opts := &webpush.Options{
Subscriber: n.VAPIDEmail,
VAPIDPublicKey: n.VAPIDPublicKey,
VAPIDPrivateKey: n.VAPIDPrivateKey,
Urgency: webpush.Urgency(urgency),
TTL: 86400,
}
var lastErr error
for _, sub := range subs {
wSub := &webpush.Subscription{
Endpoint: sub.Endpoint,
Keys: webpush.Keys{
P256dh: sub.P256DHKey,
Auth: sub.AuthKey,
},
}
resp, sendErr := webpush.SendNotification(data, wSub, opts)
if sendErr != nil {
n.Logger.Error("webpush send failed", "endpoint", sub.Endpoint, "error", sendErr)
lastErr = sendErr
continue
}
resp.Body.Close()
if resp.StatusCode >= 400 {
n.Logger.Warn("webpush returned error status", "endpoint", sub.Endpoint, "status", resp.StatusCode)
}
}
return lastErr
}
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