Finished changing structure to modules:

- ntfy
- keyserver
- webhook
- webserver
functional modules.

internal/ntfy/ntfy.go

@@ -0,0 +1,45 @@
+package ntfy
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+)
+
+type Config struct {
+	URL   string
+	Topic string
+}
+
+// Notify sends a failure notification. Silently does nothing if
+// URL or Topic are unset, so callers don't need to check first.
+func Notify(cfg Config, context string, err error) {
+	if cfg.URL == "" || cfg.Topic == "" {
+		return
+	}
+
+	msg := fmt.Sprintf("%s: %v", context, err)
+	url := fmt.Sprintf("%s/%s", cfg.URL, cfg.Topic)
+
+	req, reqErr := http.NewRequest("POST", url, bytes.NewBufferString(msg))
+	if reqErr != nil {
+		log.Printf("ntfy request build failed: %v", reqErr)
+		return
+	}
+	req.Header.Set("Title", "Varde Notification")
+	req.Header.Set("Priority", "high")
+
+	client := &http.Client{Timeout: 5 * time.Second}
+	resp, sendErr := client.Do(req)
+	if sendErr != nil {
+		log.Printf("ntfy notification failed: %v", sendErr)
+		return
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 300 {
+		log.Printf("ntfy notification returned status %d", resp.StatusCode)
+	}
+}