Extensions.swift

//
//  2DArrayAccess.swift
//  HexWars
//
//  Created by Aleksandr Grin on 8/5/17.
//  Copyright © 2017 AleksandrGrin. All rights reserved.
//

import Foundation
import UIKit
import SpriteKit

//Allows you to access a column of a 2D array
extension Array where Element : Collection {
    subscript(column column: Element.Index) -> [ Element.Iterator.Element ] {
        return map{ $0[ column ] }
    }
}

// Easily change the pieces of a frame of a view manually
extension UIView {
    func setOrigin(x:CGFloat) {
        var frame:CGRect = self.frame
        frame.origin.x = x
        self.frame = frame
    }

    func setOrigin(y:CGFloat) {
        var frame:CGRect = self.frame
        frame.origin.y = y
        self.frame = frame
    }

    func setWidth(width:CGFloat) {
        var frame:CGRect = self.frame
        frame.size.width = width
        self.frame = frame
    }

    func setHeight(height:CGFloat) {
        var frame:CGRect = self.frame
        frame.size.height = height
        self.frame = frame
    }
    
}

// Converts a view into an image essentially taking a "screenshot"
extension UIView {
    func asImage() -> UIImage {
        let renderer = UIGraphicsImageRenderer(bounds: bounds)
        return renderer.image{ rendererContext in
            layer.render(in: rendererContext.cgContext)
        }
    }
}

// Since all of our VCs are embedded in a navigation controller, we must set the orientation control here
extension UINavigationController {
    override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .portrait
    }
    override open var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation {
        return .portrait
    }
}

extension Array {
    func randomItem() -> Element? {
        if isEmpty { return nil }
        let index = Int(arc4random_uniform(UInt32(self.count)))
        return self[index]
    }
}

extension SKLabelNode {
    func multilined() -> SKLabelNode {
        let substrings: [String] = self.text!.components(separatedBy: "\n")
        return substrings.enumerated().reduce(SKLabelNode()) {
            let label = SKLabelNode(fontNamed: self.fontName)
            label.text = $1.element
            label.fontColor = self.fontColor
            label.fontSize = self.fontSize
            label.position = self.position
            label.zPosition = self.zPosition
            label.horizontalAlignmentMode = self.horizontalAlignmentMode
            label.verticalAlignmentMode = self.verticalAlignmentMode
            let y = CGFloat($1.offset - substrings.count / 2) * self.fontSize
            label.position = CGPoint(x: 0, y: -y)
            $0.addChild(label)
            return $0
        }
    }
}

extension UIColor {
    var name: String? {
        switch self {
        case UIColor.black: return "black"
        case UIColor.darkGray: return "darkGray"
        case UIColor.lightGray: return "lightGray"
        case UIColor.white: return "white"
        case UIColor.gray: return "gray"
        case UIColor.red: return "red"
        case UIColor.green: return "green"
        case UIColor.blue: return "blue"
        case UIColor.cyan: return "cyan"
        case UIColor.yellow: return "yellow"
        case UIColor.magenta: return "magenta"
        case UIColor.orange: return "orange"
        case UIColor.purple: return "purple"
        case UIColor.brown: return "brown"
        default: return nil
        }
    }
}