Add is_trial_period, original_purchase_date to VerifySubscriptionResult and VerifyPurchaseResult

[bizz84]

Platform

• iOS
• macOS
• tvOS

In app purchase type

• Consumable
• Non-consumable
• Auto-Renewable Subscription
• Non-Renewing Subscription

Environment

• Sandbox
• Production

Version

0.8.5

Report

The app receipt contains is_trial_period and original_purchase_date fields for each receipt field.

These should be made available by SwiftyStoreKit as follows:

// Result for Consumable and NonConsumable
public enum VerifyPurchaseResult {
    case purchased(originalPurchaseDate: Date)
    case notPurchased
}

// Verify subscription result
public enum VerifySubscriptionResult {
    case purchased(expiryDate: Date, originalPurchaseDate: Date, isTrialPeriod: Bool)
    case expired(expiryDate: Date, originalPurchaseDate: Date, isTrialPeriod: Bool)
    case notPurchased
}

In order to simplify parsing of the original_purchase_date and for consistency with the current implementation in InAppReceipt.swift, the original_purchase_date_ms field should be used and converted to Date in the same fashion of the InAppReceipt.getReceiptRequestDate(:) method.

This is a beginner task well suited for first time contributors. Pull requests are welcome.

[bizz84]

Available on pod version 0.9.0.