Email validation using zero bounce

backend/internal/utils/zerobounce.go

@@ -0,0 +1,46 @@
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+)
+
+type ZeroBounceResponse struct {
+	Status string `json:"status"`
+}
+
+// VerifyEmailWithZeroBounce checks if an email address is valid using the ZeroBounce API
+func VerifyEmailWithZeroBounce(email string) (string, error) {
+
+	apiKey := os.Getenv("ZEROBOUNCE_API_KEY")
+	if apiKey == "" {
+
+		return "", fmt.Errorf("ZeroBounce API key not set in environment variables")
+	}
+
+	url := fmt.Sprintf("https://api.zerobounce.net/v2/validate?email=%s&api_key=%s", email, apiKey)
+
+	resp, err := http.Get(url)
+	if err != nil {
+
+		return "", fmt.Errorf("failed to connect to ZeroBounce API: %v", err)
+	}
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+
+		return "", fmt.Errorf("ZeroBounce API returned status: %s", resp.Status)
+	}
+
+	var result ZeroBounceResponse
+
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+
+		return "", fmt.Errorf("error decoding ZeroBounce API response: %v", err)
+	}
+
+	return result.Status, nil
+}