SubscriptionState 1.1.0

SubscriptionState 1.1.0

×

Maintained by Siarhei Ladzeika.

 
Depends on:
TrueTime>= 0
TPInAppReceipt>= 0
SwiftSelfAware>= 0
Valet>= 0
 

SubscriptionState 1.1.0

  • By
  • Siarhei Ladzeika

SubscriptionState

iOS module to simplify work with subscription tracking.

Installation

Cocoapods

pod 'SubscriptionState'

Usage

With notification center

import SubscriptionState

class MyCustomSubscriptionService {

	private var observers: [NSObjectProtocol]!
	
	var isPremium: Bool = false {
		didSet {
			// TODO notify others
		}
	}
			
	deinit {
        	observers.forEach { NotificationCenter.default.removeObserver($0) }
   	}

	init() {
		
		func updateState() {
			self.isPremium = SubscriptionState.shared.isSubscriptionActive()
		}
		
		observers = [
			NotificationCenter.default.addObserver(forName: .subscriptionSomeStateDidChange, 									
                            object: SubscriptionState.shared, queue: .main) { (notification) in
				//let changedProductIdentifiers = notification.userInfo?[SubscriptionState.subscriptionSomeStateDidChangeProductsKey] as? [String]
				updateState()
			},
		
			NotificationCenter.default.addObserver(forName: .subscriptionTotalStateDidChange,
							object: SubscriptionState.shared, queue: .main) { (_) in
				updateState()	
			}
		]
		
		updateState()
	}
	
}

With observer pattern

import SubscriptionState

class MyCustomSubscriptionService: NSObject, SubscriptionStateObserver {

    private var observers: [NSObjectProtocol]!
    
    var isPremium: Bool = false {
        didSet {
            // TODO notify others
        }
    }
            
    deinit {
        SubscriptionState.shared.removeObserver(self)
    }

    override init() {
        super.init()
        SubscriptionState.shared.addObserver(self)
        updateState()
    }
    
    // MARK: - Helpers
    
    func updateState() {
        self.isPremium = SubscriptionState.shared.isSubscriptionActive()
    }

    // MARK: - SubscriptionStateObserver
        
    func subscriptionStateDidChangeTotalState(_ subscriptionState: SubscriptionState) {
        updateState()
    }
        
    func subscriptionStateDidChangeSomeState(_ subscriptionState: SubscriptionState) {
        // TODO
    }
}

Check subscription status for specified product list:

let active = SubscriptionState.isSubscriptionActive(["product1", "product2"])

Grace time interval

You can add some time interval after purchase expiration date to treat it as active.

SubscriptionState.shared.graceTimeInterval = 3600

Example above defines 3600 seconds. It adds additional hour to expiration date.

Lifetime purchases

If your application supports lifetime purchases, then you can add them for tracking:

SubscriptionState.shared.lifetimeProductIdentifiers = Set(['lifetimeProduct1'])

If at least one product from the list was purchased, then subscription will be set to active state.

Custom date resolver

Also tou can set custom date resolver callback.

SubscriptionState.shared.customDateResolver = { () -> Date in 
	...
}

It is used to determine real time and date when checking activity of subscription. By default NTP service is used.

Persistence

Subscription state is saved to keychain. So it is restored each time application starts.

Authors

LICENSE

See LICENSE