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TransferAmountView.swift
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TransferAmountView.swift
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//
// TransferAmountView.swift
// loafwallet
//
// Created by Kerry Washington on 7/17/21.
// Copyright © 2021 Litecoin Foundation. All rights reserved.
//
import SwiftUI
struct TransferAmountView: View {
//MARK: - Combine Variables
@ObservedObject
var viewModel: TransferAmountViewModel
@ObservedObject
var transferringviewModel = TransferringViewModel()
@Binding
var shouldShow: Bool
@State
private var didStartTransferringView = false
@State
private var shouldStartTransfer = false
@State
private var transferAmount: Double = 0.0
@Binding
var sliderValue: Double
//MARK: - Private Variables
private let mainPadding: CGFloat = 20.0
private let smallButtonSize: CGFloat = 25.0
private var transferAmountTo: String {
return viewModel.walletType == .litewallet ?
S.LitecoinCard.Transfer.amountToCard :
S.LitecoinCard.Transfer.amountToLitewallet
}
private var remainingCardBalance: Double {
if viewModel.walletType == .litewallet {
return abs(viewModel.cardBalance + (viewModel.currentBalance * sliderValue))
} else {
return abs(viewModel.cardBalance - (viewModel.currentBalance * sliderValue))
}
}
private var remainingLitewalletBalance: Double {
if viewModel.walletType == .litecoinCard {
return abs(viewModel.litewalletBalance + (viewModel.currentBalance * sliderValue))
} else {
return abs(viewModel.litewalletBalance - (viewModel.currentBalance * sliderValue))
}
}
init(viewModel: TransferAmountViewModel,
sliderValue: Binding<Double>,
shouldShow: Binding<Bool>) {
self.viewModel = viewModel
_sliderValue = sliderValue
_shouldShow = shouldShow
}
private func increaseValue() {
//Only take action when value is less than the current balance
if (transferAmount < viewModel.currentBalance) {
transferAmount = transferAmount + 0.001
viewModel.transferAmount = transferAmount
sliderValue = abs(transferAmount / viewModel.currentBalance)
}
}
private func decreaseValue() {
//Only take action when value is more than 0.001
if transferAmount > 0.001 {
transferAmount = transferAmount - 0.001
viewModel.transferAmount = transferAmount
sliderValue = abs(transferAmount / viewModel.currentBalance)
}
}
var body: some View {
ZStack {
if didStartTransferringView {
TransferringModalView(viewModel: transferringviewModel,
isShowingTransferring: $didStartTransferringView,
shouldStartTransfer: $shouldStartTransfer,
destinationAddress: viewModel.destinationAddress,
transferAmount: (viewModel.currentBalance * sliderValue),
walletType: viewModel.walletType)
.zIndex(1)
.onReceive(transferringviewModel.$shouldStartTransfer) { _ in
if transferringviewModel.shouldStartTransfer {
//Transfer to Litecoin Card
if viewModel.walletType == .litewallet {
viewModel.transferToCard(amount:
viewModel.transferAmount,
address: viewModel.destinationAddress) { didSend in
didStartTransferringView = didSend
}
//Transfer to Litewallet
} else if viewModel.walletType == .litecoinCard {
viewModel.transferToLitewallet(amount: viewModel.transferAmount,
address: viewModel.destinationAddress) {
didStartTransferringView = false
}
}
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
shouldShow = false
}
}
}
}
VStack {
Group {
//Litewallet Balance Amount
HStack {
Text(S.LitecoinCard.Transfer.litewalletBalance + ": ")
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
Spacer()
Text(String(format:"%5.4f", remainingLitewalletBalance) + " Ł")
.font(Font(UIFont.barlowLight(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
.padding(.trailing, 5.0)
}
//Card Balance Amount
HStack {
Text(S.LitecoinCard.cardBalance + ": ")
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
Spacer()
Text(String(format:"%5.4f", remainingCardBalance) + " Ł")
.font(Font(UIFont.barlowLight(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
.padding(.trailing, 5.0)
}
//Transfer Amount
HStack {
Text(transferAmountTo + ": ")
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
Spacer()
Text(String(format:"%5.4f", viewModel.currentBalance * sliderValue) + " Ł")
.font(Font(UIFont.barlowBold(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
.padding(.trailing, 5.0)
}
//Destination Address
HStack {
Text(S.LitecoinCard.Transfer.destinationAddress + ": ")
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.foregroundColor(Color.liteWalletBlue)
Spacer()
Text(viewModel.destinationAddress)
.font(Font(UIFont.barlowLight(size: 14.0)))
.foregroundColor(Color.liteWalletBlue)
.padding(.trailing, 5.0)
}
}
//Underline view
Divider()
//Amount Slider
Group {
HStack {
// Decrease value
Button(action: {
decreaseValue()
}) {
Image(systemName: "minus.circle.fill")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: smallButtonSize,
height: smallButtonSize,
alignment: .center)
.foregroundColor(.liteWalletBlue)
}
.shadow(radius: 2.0, x: 2.0, y: 2.0)
// Slider factor
Slider(value: $sliderValue,
in: 0...1) { _ in
transferAmount = sliderValue * viewModel.currentBalance
}
.accentColor(.liteWalletBlue)
.padding()
// Increase value
Button(action: {
increaseValue()
}) {
Image(systemName: "plus.circle.fill")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: smallButtonSize,
height: smallButtonSize,
alignment: .center)
.foregroundColor(.liteWalletBlue)
}
.shadow(radius: 2.0, x: 2.0, y: 2.0)
}
.padding(.bottom, 20.0)
}
//Show transfer modal view
Button(action: {
viewModel.transferAmount = transferAmount
didStartTransferringView = true
}) {
Text(S.LitecoinCard.Transfer.startTransfer.localizedUppercase)
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.frame(maxWidth: .infinity)
.padding(.all, 10.0)
.foregroundColor(.white)
.background(sliderValue == 0.0 ? Color.litecoinGray : Color(UIColor.liteWalletBlue))
.cornerRadius(4.0)
.overlay(
RoundedRectangle(cornerRadius: 4)
.stroke(Color.litecoinSilver)
)
}
.padding(.bottom, 5.0)
.disabled(sliderValue == 0.0 ? true : false)
// Cancel: Resets the slider
Button(action: {
self.shouldShow = false
sliderValue = 0.0
}) {
Text(S.Button.cancel.uppercased())
.font(Font(UIFont.barlowSemiBold(size: 18.0)))
.frame(maxWidth: .infinity)
.foregroundColor(Color(UIColor.liteWalletBlue))
.background(Color(UIColor.white))
.cornerRadius(4.0)
.padding(.all, 10.0)
.overlay(
RoundedRectangle(cornerRadius: 4)
.stroke(Color.litecoinSilver)
)
}
Spacer()
}
.padding([.leading, .trailing], mainPadding)
}
}
}
struct TransferAmountView_Previews: PreviewProvider {
static let walletManager = try! WalletManager(store: Store())
static let lwPlusviewModel = TransferAmountViewModel(walletType: .litewallet,
litewalletBalance: 520.0,
litewalletAddress: "MVZj7gBRwcVpa9AAWdJm8A3HqTst112eJe",
cardBalance: 0.0,
cardAddress: "MJ4W7NZya4SzE7R6xpEVdamGCimaQYPiWu",
walletManager: walletManager,
store: Store())
static let lwlcPlusviewModel = TransferAmountViewModel(walletType: .litewallet,
litewalletBalance: 520.0,
litewalletAddress: "MVZj7gBRwcVpa9AAWdJm8A3HqTst112eJe",
cardBalance: 0.658,
cardAddress: "MJ4W7NZya4SzE7R6xpEVdamGCimaQYPiWu",
walletManager: walletManager,
store: Store())
static let cardPlusviewModel = TransferAmountViewModel(walletType: .litecoinCard,
litewalletBalance: 0.0,
litewalletAddress: "MVZj7gBRwcVpa9AAWdJm8A3HqTst112eJe",
cardBalance: 0.0555,
cardAddress: "MJ4W7NZya4SzE7R6xpEVdamGCimaQYPiWu",
walletManager: walletManager,
store: Store())
static var previews: some View {
Group {
TransferAmountView(viewModel: lwPlusviewModel,
sliderValue: .constant(0.5),
shouldShow: .constant(true))
.previewDevice(PreviewDevice(rawValue: DeviceType.Name.iPhoneSE2))
.previewDisplayName(DeviceType.Name.iPhoneSE2)
TransferAmountView(viewModel: cardPlusviewModel,
sliderValue: .constant(0.0),
shouldShow: .constant(true))
.previewDevice(PreviewDevice(rawValue: DeviceType.Name.iPhone8))
.previewDisplayName(DeviceType.Name.iPhone8)
TransferAmountView(viewModel: lwlcPlusviewModel,
sliderValue: .constant(0.5),
shouldShow: .constant(true))
.previewDevice(PreviewDevice(rawValue: DeviceType.Name.iPhoneXSMax))
.previewDisplayName(DeviceType.Name.iPhoneSE2)
}
}
}