Mreyna3

import UIKit

public class PaymentProcessor {
    
    // Variable Declaration
    
    fileprivate var batchSum : Double!
    private var queue: Queue<Double>!
    private let BATCH_CAP: Double!
    private var defaults: UserDefaults!

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 private func shouldProcessBatch() -> Bool{
    //1
       guard batchSum < BATCH_CAP else {
            return true
       }
       return false
 }

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 public func enqueue(transaction: Double){
        if(shouldProcessBatch()){
         //1
            processBatch()
            addToBatch(transaction: transaction)
        }else{
        //2
            addToBatch(transaction: transaction)
        }
    }

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  private func addToBatch(transaction: Double) {
    // 1
        queue.enqueue(element: transaction)
    //2
        batchSum += transaction
        
        if(shouldProcessBatch()){
            // 3
            processBatch()
        }else{

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 func processBatch(){
        // 1
        for _ in 0..<queue.getCount(){
          // 2
            batchSum -= queue.peek()!
            print("deueuing \(queue.dequeue()!)")
            
        }
        print("deueuing \(batchSum!)")
        // 3

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func resetBatchSum(){
        //1 
        batchSum = 0.0
        //2
        defaults.set(batchSum, forKey: "batch_sum")
    }
    

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var transactionsDataSource1 = [0.32,0.10,0.01,0.02]

var processor = PaymentProcessor()
for i in 0..<transactionsDataSource1.count {
    processor.enqueue(transaction: transactionsDataSource1[i])
}

let sum = processor.batchSum
print(sum)

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public extension Double {
    func format() -> String{
        let formatter = NumberFormatter()
        formatter.numberStyle = .currency
        let formattedDouble = formatter.string(from: self as NSNumber)
        return formattedDouble!
    }
}

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     fileprivate var batchSum : Double!{
        willSet{
            if (newValue > 0 && newValue > batchSum){
                print("\((newValue - batchSum).format()) enqueud into the batch, the updated batch value is: \(newValue!.format())")
            }
            defaults.set(newValue, forKey: "batch_sum")
        }
    }

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   func processBatch(){
        
        for _ in 0..<queue.getCount(){
            batchSum -= queue.peek()!
          //1
            print("deueuing \(queue.dequeue()!.format())")
            
        }
        //2
        print("deueuing \(batchSum!.format())")