Attractor/SBrowser/Script Policy UI/ScriptPolicyControl.swift

//
//  ScriptPolicyControl.swift
//  SBrowser
//
//  Created by James Magahern on 7/24/20.
//

import UIKit

class ScriptPolicyControl: UIControl
{
    enum PolicyStatus {
        case allowed
        case blocked
    }
    
    var policyStatus: PolicyStatus = .blocked {
        didSet { setNeedsLayout() }
    }
    
    private class PolicyButton: UIButton {
        override func imageRect(forContentRect contentRect: CGRect) -> CGRect {
            contentRect.insetBy(dx: 8.0, dy: 8.0)
        }
    }
    
    private let allowButton = PolicyButton(frame: .zero)
    private let denyButton = PolicyButton(frame: .zero)
    
    convenience init() {
        self.init(frame: .zero)
        
        allowButton.addAction(UIAction(handler: { _ in
            self.policyStatus = .allowed
            self.sendActions(for: .valueChanged)
        }), for: .touchUpInside)
        allowButton.imageView?.contentMode = .scaleAspectFit
        addSubview(allowButton)
        
        denyButton.addAction(UIAction(handler: { _ in
            self.policyStatus = .blocked
            self.sendActions(for: .valueChanged)
        }), for: .touchUpInside)
        denyButton.imageView?.contentMode = .scaleAspectFit
        addSubview(denyButton)
    }
    
    override var intrinsicContentSize: CGSize {
        CGSize(width: 100.0, height: UIView.noIntrinsicMetric)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        allowButton.frame = CGRect(origin: .zero, size: CGSize(width: bounds.width / 2, height: bounds.height))
        denyButton.frame = CGRect(origin: CGPoint(x: allowButton.frame.maxX, y: 0), size: allowButton.frame.size)
        
        if policyStatus == .allowed {
            allowButton.tintColor = .blue
            allowButton.setImage(UIImage(systemName: "play.circle.fill"), for: .normal)
            
            denyButton.tintColor = .darkGray
            denyButton.setImage(UIImage(systemName: "stop.circle"), for: .normal)
        } else {
            allowButton.tintColor = .darkGray
            allowButton.setImage(UIImage(systemName: "play.circle"), for: .normal)
            
            denyButton.tintColor = .red
            denyButton.setImage(UIImage(systemName: "stop.circle.fill"), for: .normal)
        }
    }
}