Dock Shooter - a game in your dock icon

AppDelegate.gist

//
//  AppDelegate.swift
//  Dock Shooter
//
//  Created by Shihab Mehboob on 01/11/2021.
//

import Cocoa

@main
class AppDelegate: NSObject, NSApplicationDelegate {
    
    let statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)
    let bgView = NSView()
    let shipView = NSImageView()
    var timer: Timer?
    var yLoc: CGFloat = 0
    var score: Int = 0
    var hideScore: Bool = false
    let bullet = NSView()
    let enemy = NSView()
    var xLoc: CGFloat = 12
    var xLoc2: CGFloat = CGFloat((NSApp.dockTile.contentView?.frame.width ?? 0))
    var maxY = (NSApp.dockTile.contentView?.frame.height ?? 0)
    var possibleYLocMax: CGFloat = 0.0
    
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // fetch settings
        hideScore = UserDefaults.standard.value(forKey: "hideScore") as? Bool ?? false
        
        // create the menu
        if let button = statusItem.button {
            button.image = NSImage(named: NSImage.Name("smallIcon"))
            button.action = #selector(restart(_:))
        }
        constructMenu()
        
        // set up views and locations
        bgView.wantsLayer = true
        bgView.layer?.backgroundColor = NSColor(red: 0.1, green: 0.1, blue: 0.1, alpha: 1).cgColor
        bgView.layer?.cornerRadius = 25
        bgView.layer?.cornerCurve = .continuous
        NSApp.dockTile.contentView = bgView
        NSApp.dockTile.display()
        bgView.frame = CGRect(x: 5, y: 5, width: (NSApp.dockTile.contentView?.frame.width ?? 0) - 12, height: (NSApp.dockTile.contentView?.frame.height ?? 0) - 12)
        
        shipView.wantsLayer = true
        shipView.image = NSImage(named: "Triangle")
        shipView.layer?.backgroundColor = NSColor.clear.cgColor
        shipView.frame = CGRect(x: 12, y: 12, width: 16, height: 16)
        bgView.addSubview(shipView)
        NSApp.dockTile.display()
        
        xLoc2 = CGFloat((NSApp.dockTile.contentView?.frame.width ?? 0))
        self.bgView.addSubview(bullet)
        self.bgView.addSubview(enemy)
        maxY = (NSApp.dockTile.contentView?.frame.height ?? 0)
        possibleYLocMax = Double.random(in: 1...maxY)
        
        // set up global mouse monitoring events
        NSEvent.addGlobalMonitorForEvents(matching: NSEvent.EventTypeMask.mouseMoved, handler: {(mouseEvent: NSEvent) in
            DispatchQueue.main.async {
                let position = mouseEvent.locationInWindow
                self.yLoc = CGFloat(position.y)
                if self.yLoc > ((NSApp.dockTile.contentView?.frame.height ?? 0) - 24) {
                    self.shipView.frame.origin.y = ((NSApp.dockTile.contentView?.frame.height ?? 0) - 24)
                } else {
                    self.shipView.frame.origin.y = self.yLoc
                }
                NSApp.dockTile.display()
            }
        })
        
        // start timer
        timer = Timer.scheduledTimer(timeInterval: 0.01, target: self, selector: #selector(fireTimer), userInfo: nil, repeats: true)
    }
    
    @objc func fireTimer() {
        // create bullets and enemies
        bullet.wantsLayer = true
        if #available(macOS 12.0, *) {
            bullet.layer?.backgroundColor = NSColor.systemCyan.cgColor
        } else {
            bullet.layer?.backgroundColor = NSColor.white.cgColor
        }
        bullet.layer?.cornerRadius = 3
        bullet.frame = CGRect(x: xLoc, y: self.yLoc + 4, width: 6, height: 6)
        bullet.frame.origin.x = xLoc
        xLoc += 3
        if xLoc >= CGFloat((NSApp.dockTile.contentView?.frame.width ?? 0) - 24) {
            xLoc = 0
            NSApp.dockTile.display()
        }
        enemy.wantsLayer = true
        enemy.layer?.backgroundColor = NSColor.systemPink.cgColor
        enemy.layer?.cornerRadius = 5
        enemy.frame = CGRect(x: xLoc2, y: possibleYLocMax, width: 10, height: 10)
        enemy.frame.origin.x = xLoc2
        NSApp.dockTile.display()
        xLoc2 -= 0.4
        if xLoc2 <= CGFloat(12) {
            xLoc2 = CGFloat((NSApp.dockTile.contentView?.frame.width ?? 0))
            possibleYLocMax = Double.random(in: 1...maxY)
            NSApp.dockTile.display()
        }
        if (self.bullet.frame.origin.y <= self.enemy.frame.origin.y + 2) && (self.bullet.frame.origin.y >= self.enemy.frame.origin.y - 2) {
            self.score += 1
            self.xLoc2 = CGFloat((NSApp.dockTile.contentView?.frame.width ?? 0))
            self.possibleYLocMax = Double.random(in: 1...self.maxY)
            if hideScore {} else {
                NSApp.dockTile.badgeLabel = "\(score)"
            }
        }
    }
    
    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }
    
    func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
        return true
    }
    
    @objc func restart(_ sender: Any?) {
        // reset score
        score = 0
        NSApp.dockTile.badgeLabel = ""
        NSApp.dockTile.display()
    }
    
    @objc func toggleBadge(_ sender: Any?) {
        // hide or display application badge
        hideScore = !hideScore
        UserDefaults.standard.set(hideScore, forKey: "hideScore")
        if hideScore {
            NSApp.dockTile.badgeLabel = ""
        } else {
            NSApp.dockTile.badgeLabel = "\(score)"
        }
        constructMenu()
    }
    
    func constructMenu() {
        // menu options
        var bTxt = "Hide Score Badge"
        if hideScore {
            bTxt = "Show Score Badge"
        }
        let menu = NSMenu()
        let m0 = NSMenuItem(title: "Restart", action: #selector(AppDelegate.restart(_:)), keyEquivalent: "")
        menu.addItem(m0)
        let m1 = NSMenuItem(title: bTxt, action: #selector(AppDelegate.toggleBadge(_:)), keyEquivalent: "")
        menu.addItem(m1)
        menu.addItem(NSMenuItem.separator())
        menu.addItem(NSMenuItem(title: "Quit Dock Shooter", action: #selector(NSApplication.terminate(_:)), keyEquivalent: "q"))
        statusItem.menu = menu
    }
    
}