danielt1263

//
//  PaginationNetworkLogic.swift
//
//  Created by Daniel Tartaglia on 4/9/17.
//  Copyright © 2019 Daniel Tartaglia. MIT License
//

import RxSwift

struct PaginationUISource {

danielt1263

//  ObservableBuffer.swift
//
//  Created by Daniel Tartaglia
//  Copyright © 2019 Daniel Tartaglia. MIT License.

import RxSwift

extension ObservableType {

    /**

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class ViewController: UIViewController
{
    @IBOutlet weak var avatarView: UIImageView!

    var api: API!

    @IBAction func changeAvatar(_ sender: UITapGestureRecognizer) {
        guard let senderView = sender.view else { fatalError("Tapped on viewless gesture recognizer?") }

        getImage(focusView: senderView).then { image -> Promise<UIImage> in

danielt1263

extension UIViewController
{
    func getImage(focusView: UIView) -> Promise<UIImage> {
        var delegate: ImagePickerDelegate! = ImagePickerDelegate()
        let controller = UIImagePickerController()
        controller.delegate = delegate
        let result = choiceIndexUsingActionSheet(title: "", message: "", choices: sourceOptions.map { $0.title }, onSourceView: focusView).then { (index) -> Promise<UIImage> in
            sourceOptions[index].action(controller)
            self.present(controller, animated: true, completion: nil)
            return delegate.promise

danielt1263

class ViewController: UIViewController
{
    @IBOutlet weak var avatarView: UIImageView!

    var api: API!
    var imagePickerDelegate: ImagePickerDelegate!

    @IBAction func changeAvatar(_ sender: UITapGestureRecognizer) {
        guard let senderView = sender.view else { fatalError("Tapped on viewless gesture recognizer?") }
        

danielt1263

class ImagePickerDelegate: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate
{
    let promise = Promise<UIImage>()
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        if let image = (info[UIImagePickerControllerEditedImage] as? UIImage) ?? (info[UIImagePickerControllerOriginalImage] as? UIImage) {
            promise.fulfill(image)
        }
        else {
            promise.reject(UIImagePickerControllerError.missingImage)

danielt1263

class ViewController: UIViewController
{
    @IBAction func changeAvatar(_ sender: UITapGestureRecognizer) {
        guard let senderView = sender.view else { fatalError("Tapped on viewless gesture recognizer?") }
        let controller = UIImagePickerController()
        controller.delegate = self
        choiceIndexUsingActionSheet(title: "", message: "", choices: sourceOptions.map { $0.title }, onSourceView: senderView).then { index in
            sourceOptions[index].action(controller)
            self.present(controller, animated: true, completion: nil)
        }

danielt1263

enum UserInteractionError: Error {
    case userCanceled
}

extension UIViewController
{
    func choiceIndexUsingActionSheet(title: String, message: String, choices: [String], onSourceView view: UIView) -> Promise<Int> {
        return Promise(queue: DispatchQueue.main) { fulfill, reject in
            let alert = UIAlertController(title: title.isEmpty ? nil : title, message: message.isEmpty ? nil : message, preferredStyle: .actionSheet)

danielt1263

extension UIViewController
{
    @discardableResult
    func displayInformationAlert(title: String, message: String) -> Promise<Void> {
        return Promise(queue: DispatchQueue.main) { fulfill, _ in
            let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { _ in fulfill() }))
            self.present(alert, animated: true, completion: nil)
        }
    }

danielt1263

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        let image = (info[UIImagePickerControllerEditedImage] as? UIImage) ?? (info[UIImagePickerControllerOriginalImage] as? UIImage)
        if let data = image.flatMap({ UIImageJPEGRepresentation($0, 0.8)} ) {
            api.upload(avatar: data).then { [weak self] in
                self?.avatarView.image = image
                self?.dismiss(animated: true, completion: nil)
            }
            .catch { [weak self] error in