feat: Implement payment retry system and draft ticket expiry management

- Add 30-minute expiry window for draft tickets with automatic cleanup
- Implement 3-attempt payment retry mechanism with tracking
- Create background job for cleaning expired draft tickets every 10 minutes
- Add comprehensive UI warnings for expiring tickets and retry attempts
- Enhance dashboard to display pending draft tickets with retry options
- Add payment cancellation handling with smart retry redirections
- Include rake tasks for manual cleanup and statistics
- Add database fields: expires_at, payment_attempts, last_payment_attempt_at, stripe_session_id
- Fix payment attempt counter display to show correct attempt number (1/3, 2/3, 3/3)

app/models/ticket.rb

@@ -1,4 +1,8 @@
 class Ticket < ApplicationRecord
+  # === Constants ===
+  DRAFT_EXPIRY_TIME = 30.minutes
+  MAX_PAYMENT_ATTEMPTS = 3
+
   # === Associations ===
   belongs_to :user
   belongs_to :ticket_type
@@ -12,9 +16,17 @@ class Ticket < ApplicationRecord
   validates :status, presence: true, inclusion: { in: %w[draft active used expired refunded] }
   validates :first_name, presence: true
   validates :last_name, presence: true
+  validates :payment_attempts, presence: true, numericality: { greater_than_or_equal_to: 0 }
+
+  # === Scopes ===
+  scope :draft, -> { where(status: "draft") }
+  scope :active, -> { where(status: "active") }
+  scope :expired_drafts, -> { draft.where("expires_at < ?", Time.current) }
+  scope :can_retry_payment, -> { draft.where("payment_attempts < ? AND expires_at > ?", MAX_PAYMENT_ATTEMPTS, Time.current) }
 
   before_validation :set_price_from_ticket_type, on: :create
   before_validation :generate_qr_code, on: :create
+  before_validation :set_draft_expiry, on: :create
 
   # Generate PDF ticket
   def to_pdf
@@ -26,6 +38,38 @@ class Ticket < ApplicationRecord
     price_cents / 100.0
   end
 
+  # Check if ticket can be retried for payment
+  def can_retry_payment?
+    draft? && payment_attempts < MAX_PAYMENT_ATTEMPTS && !expired?
+  end
+
+  # Check if ticket is expired
+  def expired?
+    expires_at.present? && expires_at < Time.current
+  end
+
+  # Mark ticket as expired if it"s past expiry time
+  def expire_if_overdue!
+    return unless draft? && expired?
+
+    update!(status: "expired")
+  end
+
+  # Increment payment attempt counter
+  def increment_payment_attempt!
+    update!(
+      payment_attempts: payment_attempts + 1,
+      last_payment_attempt_at: Time.current
+    )
+  end
+
+  # Check if draft is about to expire (within 5 minutes)
+  def expiring_soon?
+    return false unless draft? && expires_at.present?
+
+    expires_at <= 5.minutes.from_now
+  end
+
   private
 
   def set_price_from_ticket_type
@@ -41,4 +85,14 @@ class Ticket < ApplicationRecord
       break unless Ticket.exists?(qr_code: qr_code)
     end
   end
+
+  def set_draft_expiry
+    return unless status == "draft"
+
+    self.expires_at = DRAFT_EXPIRY_TIME.from_now if expires_at.blank?
+  end
+
+  def draft?
+    status == "draft"
+  end
 end