eqn.ios/Sources/Earthquake Network/Models/EQNPurchaseUtility.swift

//
//  EQNPurchaseUtility.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 30/07/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import Foundation


@objc
public class EQNPurchaseUtility: NSObject {
    
    private static let AppOpenCountForDiscount = 15
    
    // MARK: - Public
    
    /// Check if a discounted price is available and returns the remaining time to get the offer.
    /// If zero, no discounted price is available
    /// - Parameter completion: Completion
    static func offerTimeRemaining(completion: @escaping (_ timeRemaining: Int) -> Void) {
        let appOpenCounter = UserDefaults.standard.integer(forKey: UserDefaults.UserDataProDiscountOpenCounter)
        if appOpenCounter < Self.AppOpenCountForDiscount {
            completion(0)
            return
        }
        
        let discountExpired = UserDefaults.standard.bool(forKey: UserDefaults.UserDataProDiscountExpired)
        if discountExpired {
            completion(0)
            return
        }
        
        EQNUser.default().downloadOfferTimeRemaining { (timeOffer) in
            if timeOffer == 0 {
                UserDefaults.standard.set(true, forKey: UserDefaults.UserDataProDiscountExpired)
            }
            
            let timeInHours = timeOffer / 60
            completion(timeInHours)
        }
    }
    
    /// Returns availabilities for active subscriptions
    /// - Parameter completion: Completion
    static func availableSubscriptions(completion: @escaping (_ availability: EQNPurchaseAvailability?) -> Void) {
        // previously, to get this data a separated call was required
        // starting from March 2023, the values are available from the EQNServerUrlDownloadSmartphoneNetwork request
        
        let reteSmartPhone = EQNManager.manager().rete_smartphone
        let availability = EQNPurchaseAvailability(top10kAvailable: reteSmartPhone?.top10kAvailable ?? 0,
                                                   top100kAvailable: reteSmartPhone?.top100kAvailable ?? 0)
        completion(availability)
    }
    
    /// Check if user has bought pro app version
    /// Pro version is enabled also if a yearly subscription is enabled
    @objc public static func isProVersionEnabled() -> Bool {
        EQNInAppProducts.Identifier.identifierForProVersion.reduce(false) { (result, identifier) -> Bool in
            return result || UserDefaults.standard.bool(forKey: identifier)
        }
    }
    
    /// Check if user has bought Top 10k subscription
    @objc public static func isTop10kEnabled() -> Bool {
        EQNInAppProducts.Identifier.identifiersForTop10k.reduce(false) { (result, identifier) -> Bool in
            return result || UserDefaults.standard.bool(forKey: identifier)
        }
    }
    
    /// Check if user has bought Top 100k subscription
    @objc public static func isTop100kEnabled() -> Bool {
        EQNInAppProducts.Identifier.identifiersForTop100k.reduce(false) { (result, identifier) -> Bool in
            return result || UserDefaults.standard.bool(forKey: identifier)
        }
    }
    
    /// Remove saved in-app purchases flags.
    /// Used only during development
    @objc public static func resetInAppPurchases() {
        EQNInAppProducts.Identifier.identifiers.forEach { (identifier) in
            UserDefaults.standard.removeObject(forKey: identifier)
        }
        NotificationCenter.default.post(name: .EQNInAppPurchaseDidComplete, object: nil)
    }
    
    /// Use to simulate the purchase of the Pro version
    @objc public static func simulateProPurchase(identifier: String) {
        // store and notify
        UserDefaults.standard.set(true, forKey: identifier)
        NotificationCenter.default.post(name: .EQNInAppPurchaseDidComplete, object: identifier)
    }
}