feat(notify): Telegram/Webhook нотификаторы + Dispatcher по каналам проекта

internal/notify/webhook.go

@@ -0,0 +1,43 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+// Webhook delivers notifications as a JSON POST of the Event to a
+// project-configured URL. Config is {"url": "..."}. secret is currently
+// unused (reserved for future request signing) and is never logged.
+type Webhook struct {
+	HTTP *http.Client
+}
+
+func (w *Webhook) Send(ctx context.Context, cfg json.RawMessage, secret string, ev Event) error {
+	var c struct {
+		URL string `json:"url"`
+	}
+	if err := json.Unmarshal(cfg, &c); err != nil {
+		return err
+	}
+	body, err := json.Marshal(ev)
+	if err != nil {
+		return err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.URL, bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := w.HTTP.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("webhook: status %d", resp.StatusCode)
+	}
+	return nil
+}