initial commit

backend/internal/utils/string_util.go

@@ -0,0 +1,43 @@
+package utils
+
+import (
+	"crypto/rand"
+	"fmt"
+	"math/big"
+	"net/url"
+)
+
+// GenerateRandomAlphanumericString generates a random alphanumeric string of the given length
+func GenerateRandomAlphanumericString(length int) (string, error) {
+	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	const charsetLength = int64(len(charset))
+
+	if length <= 0 {
+		return "", fmt.Errorf("length must be a positive integer")
+	}
+
+	result := make([]byte, length)
+
+	for i := range result {
+		num, err := rand.Int(rand.Reader, big.NewInt(charsetLength))
+		if err != nil {
+			return "", err
+		}
+		result[i] = charset[num.Int64()]
+	}
+
+	return string(result), nil
+}
+
+func GetHostFromURL(rawURL string) string {
+	parsedURL, err := url.Parse(rawURL)
+	if err != nil {
+		return ""
+	}
+	return parsedURL.Host
+}
+
+// StringPointer creates a string pointer from a string value
+func StringPointer(s string) *string {
+	return &s
+}