add middlewares, handlers and database models

internal/model/token.go

@@ -0,0 +1,34 @@
+package model
+
+import (
+	"time"
+)
+
+type Token struct {
+	ID        string     `db:"id"`
+	UserID    string     `db:"user_id"`
+	Type      string     `db:"type"` // "email_verify" or "password_reset"
+	Token     string     `db:"token"`
+	ExpiresAt time.Time  `db:"expires_at"`
+	UsedAt    *time.Time `db:"used_at"`
+	CreatedAt time.Time  `db:"created_at"`
+}
+
+const (
+	TokenTypeEmailVerify   = "email_verify"
+	TokenTypePasswordReset = "password_reset"
+	TokenTypeEmailChange   = "email_change"
+	TokenTypeMagicLink     = "magic_link"
+)
+
+func (t *Token) IsExpired() bool {
+	return time.Now().After(t.ExpiresAt)
+}
+
+func (t *Token) IsUsed() bool {
+	return t.UsedAt != nil
+}
+
+func (t *Token) IsValid() bool {
+	return !t.IsExpired() && !t.IsUsed()
+}