session-ios/Session/View Controllers/KeyPairMigrationSheet.swift

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Swift
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final class KeyPairMigrationSheet : Sheet {
override class var isDismissable: Bool { false }
override func populateContentView() {
// Image view
let imageView = UIImageView(image: #imageLiteral(resourceName: "Shield").withTint(Colors.text))
imageView.set(.width, to: 64)
imageView.set(.height, to: 64)
imageView.contentMode = .scaleAspectFit
// Title label
let titleLabel = UILabel()
titleLabel.textColor = Colors.text
titleLabel.font = .boldSystemFont(ofSize: isIPhone5OrSmaller ? Values.largeFontSize : Values.veryLargeFontSize)
titleLabel.text = "Session IDs Just Got Better"
titleLabel.textAlignment = .center
titleLabel.numberOfLines = 0
titleLabel.lineBreakMode = .byWordWrapping
// Top stack view
let topStackView = UIStackView(arrangedSubviews: [ imageView, titleLabel ])
topStackView.axis = .vertical
topStackView.spacing = Values.largeSpacing
topStackView.alignment = .center
// Explanation label
let explanationLabel = UILabel()
explanationLabel.textColor = Colors.text
explanationLabel.font = .systemFont(ofSize: Values.smallFontSize)
explanationLabel.textAlignment = .center
explanationLabel.text = """
Weve upgraded Session IDs to make them even more private and secure. To ensure your continued privacy you're now required to upgrade.
Your existing contacts and conversations will be lost, but youll be able to use Session knowing you have the best privacy and security possible.
"""
explanationLabel.numberOfLines = 0
explanationLabel.lineBreakMode = .byWordWrapping
// Upgrade now button
let upgradeNowButton = Button(style: .prominentOutline, size: .large)
upgradeNowButton.set(.width, to: 240)
upgradeNowButton.setTitle("Upgrade Now", for: UIControl.State.normal)
upgradeNowButton.addTarget(self, action: #selector(upgradeNow), for: UIControl.Event.touchUpInside)
// Main stack view
let stackView = UIStackView(arrangedSubviews: [ topStackView, explanationLabel, upgradeNowButton ])
stackView.axis = .vertical
stackView.spacing = Values.veryLargeSpacing
stackView.alignment = .center
// Constraints
contentView.addSubview(stackView)
stackView.pin(.leading, to: .leading, of: contentView, withInset: Values.veryLargeSpacing)
stackView.pin(.top, to: .top, of: contentView, withInset: Values.largeSpacing)
contentView.pin(.trailing, to: .trailing, of: stackView, withInset: Values.veryLargeSpacing)
contentView.pin(.bottom, to: .bottom, of: stackView, withInset: Values.veryLargeSpacing + overshoot)
}
@objc private func upgradeNow() {
Storage.prepareForV2KeyPairMigration()
}
}