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

internal/notify/telegram.go

@@ -0,0 +1,45 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+// Telegram delivers notifications via the Telegram Bot API sendMessage
+// endpoint. Config is {"chat_id": "..."}; secret is the bot token and is
+// never logged.
+type Telegram struct {
+	BaseURL string
+	HTTP    *http.Client
+}
+
+func (t *Telegram) Send(ctx context.Context, cfg json.RawMessage, secret string, ev Event) error {
+	var c struct {
+		ChatID string `json:"chat_id"`
+	}
+	if err := json.Unmarshal(cfg, &c); err != nil {
+		return err
+	}
+	body, _ := json.Marshal(map[string]string{
+		"chat_id": c.ChatID,
+		"text":    fmt.Sprintf("[%s] %s → %s\n%s", ev.Project, ev.Domain, ev.Status, ev.Summary),
+	})
+	url := t.BaseURL + "/bot" + secret + "/sendMessage"
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := t.HTTP.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return fmt.Errorf("telegram: status %d", resp.StatusCode)
+	}
+	return nil
+}