add app store subscription notify model

appstore/subscription.go

@@ -0,0 +1,85 @@
+package appstore
+
+// https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/Subscriptions.html#//apple_ref/doc/uid/TP40008267-CH7-SW16
+type NotificationType string
+
+const (
+	// Initial purchase of the subscription.
+	NotificationTypeInitialBuy NotificationType = "INITIAL_BUY"
+	// Subscription was canceled by Apple customer support.
+	NotificationTypeCancel NotificationType = "CANCEL"
+	// Automatic renewal was successful for an expired subscription.
+	NotificationTypeRenewal NotificationType = "RENEWAL"
+	// Customer renewed a subscription interactively after it lapsed.
+	NotificationTypeInteractiveRenewal NotificationType = "INTERACTIVE_RENEWAL"
+	// Customer changed the plan that takes affect at the next subscription renewal. Current active plan is not affected.
+	NotificationTypeDidChangeRenewalPreference NotificationType = "DID_CHANGE_RENEWAL_PREFERENCE"
+)
+
+type NotificationEnv string
+
+const (
+	NotificationEnvSandbox    NotificationEnv = "SANDBOX"
+	NotificationEnvProduction NotificationEnv = "PROD"
+)
+
+type NotificationExpiresDate struct {
+	ExpiresDateMS  string `json:"expires_date"`
+	ExpiresDateUTC string `json:"expires_date_formatted"`
+	ExpiresDatePST string `json:"expires_date_formatted_pst"`
+}
+
+type NotificationReceipt struct {
+	UniqueIdentifier          string `json:"unique_identifier"`
+	AppItemID                 string `json:"app_item_id"`
+	Quantity                  string `json:"quantity"`
+	VersionExternalIdentifier string `json:"version_external_identifier"`
+	UniqueVendorIdentifier    string `json:"unique_vendor_identifier"`
+	WebOrderLineItemID        string `json:"web_order_line_item_id"`
+	ItemID                    string `json:"item_id"`
+	ProductID                 string `json:"product_id"`
+	BID                       string `json:"bid"`
+	BVRS                      string `json:"bvrs"`
+	TransactionID             string `json:"transaction_id"`
+	OriginalTransactionID     string `json:"original_transaction_id"`
+
+	PurchaseDate
+	OriginalPurchaseDate
+	NotificationExpiresDate
+	CancellationDate
+}
+
+type SubscriptionNotification struct {
+	Environment      NotificationEnv  `json:"environment"`
+	NotificationType NotificationType `json:"notification_type"`
+
+	// Not show in raw notify body
+	Password              string `json:"password"`
+	OriginalTransactionID string `json:"original_transaction_id"`
+	AutoRenewAdamID       string `json:"auto_renew_adam_id"`
+
+	// The primary key for identifying a subscription purchase.
+	// Posted only if the notification_type is CANCEL.
+	WebOrderLineItemID string `json:"web_order_line_item_id"`
+
+	// This is the same as the Subscription Expiration Intent in the receipt.
+	// Posted only if notification_type is RENEWAL or INTERACTIVE_RENEWAL.
+	ExpirationIntent string `json:"expiration_intent"`
+
+	// Auto renew info
+	AutoRenewStatus    string `json:"auto_renew_status"` // false or true
+	AutoRenewProductID string `json:"auto_renew_product_id"`
+
+	// Posted if the notification_type is RENEWAL or INTERACTIVE_RENEWAL, and only if the renewal is successful.
+	// Posted also if the notification_type is INITIAL_BUY.
+	// Not posted for notification_type CANCEL.
+	LatestReceipt     string              `json:"latest_receipt"`
+	LatestReceiptInfo NotificationReceipt `json:"latest_receipt_info"`
+
+	// Posted only if the notification_type is RENEWAL or CANCEL or if renewal failed and subscription expired.
+	LatestExpiredReceipt     string              `json:"latest_expired_receipt"`
+	LatestExpiredReceiptInfo NotificationReceipt `json:"latest_expired_receipt_info"`
+
+	// Posted only if the notification_type is CANCEL.
+	CancellationDate
+}