AppDelegate.swift

import Cocoa
import Frinkiac

@NSApplicationMain

// MARK: - App Delegate -
//------------------------------------------------------------------------------
class AppDelegate: NSObject, NSApplicationDelegate, NSTextFieldDelegate {
    // MARK: - Private -
    //--------------------------------------------------------------------------
    fileprivate var frameImage: FrameImage<Frinkiac>? = nil {
        didSet {
            setImage(frameImage?.image, text: frameImage?.caption?.lines ?? "")
        }
    }
    fileprivate let memeGenerator = Frinkiac()
    fileprivate var searchProvider: FrameSearchProvider<Frinkiac>!

    // MARK: - Outlets -
    //--------------------------------------------------------------------------
    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var imageView: NSImageView!
    @IBOutlet weak var searchTextField: NSSearchField!
    @IBOutlet weak var textField: NSTextField!
    @IBOutlet weak var shareButton: NSButton!
}

// MARK: - Extension, Initialization -
//------------------------------------------------------------------------------
extension AppDelegate {
    override func awakeFromNib() {
        super.awakeFromNib()
        //----------------------------------------------------------------------
        searchProvider = FrameSearchProvider(memeGenerator) { [weak self] in
            self?.frameImage = $0.first
            self?.frameImage?.caption {
                do { self?.frameImage = try $0() }
                catch { print(error.localizedDescription) }
            }
        }
    }
}

// MARK: - Extension, Actions -
//------------------------------------------------------------------------------
extension AppDelegate {
    @IBAction func search(_ sender: Any?) {
        searchProvider.find(searchTextField.stringValue)
    }

    @IBAction func random(_ sender: Any?) {
        searchProvider.random { [weak self] in
            do { self?.frameImage = try $0() }
            catch { print(error.localizedDescription) }
        }
    }

    @IBAction func share(_ sender: Any) {
        if let image = frameImage?.image, let view = sender as? NSView {
            let sharingServicePicker = NSSharingServicePicker(items: [image])
            sharingServicePicker.delegate = self
            sharingServicePicker.show(relativeTo: view.bounds, of: view, preferredEdge: .minY)
        }
    }
}

// MARK: - Extension, Share Services -
//------------------------------------------------------------------------------
extension AppDelegate: NSSharingServicePickerDelegate {
}

// MARK: - Extension, Set Image -
//------------------------------------------------------------------------------
extension AppDelegate {
    // MARK: - Private -
    //--------------------------------------------------------------------------
    fileprivate func setImage(_ image: ImageType?, text: String = "") {
        DispatchQueue.main.async { [weak self] in
            self?.imageView.image = image
            self?.textField.stringValue = text
        }
    }
}

// MARK: - Extension, Control Callbacks -
// https://developer.apple.com/library/content/qa/qa1454/_index.html
//------------------------------------------------------------------------------
extension AppDelegate {
    /// Sent when the text in the receiving control changes.
    override func controlTextDidChange(_ obj: Notification) {
        switch obj.object {
        case let searchField as NSSearchField where searchField.isEqual(searchTextField):
            search(obj.object)
        case let textField as NSTextField where textField.isEqual(textField):
            let text = textField.stringValue
            frameImage?.update(text: text.memeText) { [weak self] in
                do { self?.setImage(try $0()?.image, text: text) }
                catch { print(error.localizedDescription) }
            }
        default: ()
        }
    }

    func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
        if commandSelector == #selector(NSResponder.insertNewline(_:)) {
            textView.insertNewlineIgnoringFieldEditor(self)
            return true
        }
        return false
    }
}