Initial commit: Open sourcing all of the Maple Open Technologies code.

cloud/maplepress-backend/internal/usecase/site/generate_verification_token.go

@@ -0,0 +1,37 @@
+package site
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+
+	"go.uber.org/zap"
+)
+
+// GenerateVerificationTokenUseCase generates a verification token for domain verification
+type GenerateVerificationTokenUseCase struct {
+	logger *zap.Logger
+}
+
+// ProvideGenerateVerificationTokenUseCase creates a new GenerateVerificationTokenUseCase
+func ProvideGenerateVerificationTokenUseCase(
+	logger *zap.Logger,
+) *GenerateVerificationTokenUseCase {
+	return &GenerateVerificationTokenUseCase{
+		logger: logger,
+	}
+}
+
+// Execute generates a cryptographically secure verification token
+func (uc *GenerateVerificationTokenUseCase) Execute() (string, error) {
+	b := make([]byte, 16) // 16 bytes = 128 bits
+	if _, err := rand.Read(b); err != nil {
+		uc.logger.Error("failed to generate random bytes", zap.Error(err))
+		return "", err
+	}
+
+	token := base64.RawURLEncoding.EncodeToString(b)
+	verificationToken := "mvp_" + token // mvp = maplepress verify
+
+	uc.logger.Info("verification token generated")
+	return verificationToken, nil
+}