Share View Controller Code

ShareViewController.swift

//
//  ShareViewController.swift
//  Kuoter
//
//  Created by Leone Parise Vieira da Silva on 23/09/16.
//  Copyright © 2016 Kuoter. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import TTTAttributedLabel
import WebImage
import SVProgressHUD
import Photos
import DAKeyboardControl
import Appz
import FBSDKShareKit
import Async
import Photos
import Permission
import RxOptional

class ShareViewController: RxViewController<ShareViewModel>, CloseableViewControllerType {
    @IBOutlet weak var contentView:UIView!
    @IBOutlet weak var quoteImageView:UIImageView!
    @IBOutlet weak var authorLabel:UILabel!
    @IBOutlet weak var overlayView:UIView!
    
    @IBOutlet weak var changeFontButton:UIButton!
    @IBOutlet weak var changePicButton:UIButton!
    @IBOutlet weak var toggleOverlayButton:UIButton!
    @IBOutlet weak var decLineButton:UIButton!
    @IBOutlet weak var decWidthButton:UIButton!
    @IBOutlet weak var textAlignCenterButton:UIButton!
    @IBOutlet weak var toggleAuthorButton:UIButton!
    
    @IBOutlet weak var facebookShareButton:UIButton!
    @IBOutlet weak var instagramShareButton:UIButton!
    @IBOutlet weak var whatsappShareButton:UIButton!
    @IBOutlet weak var messengerShareButton:UIButton!
    @IBOutlet weak var saveButton:UIButton!
    @IBOutlet weak var copyButton:UIButton!
    @IBOutlet weak var shareButton:UIButton!
    @IBOutlet weak var shareScrollView:UIScrollView!
    @IBOutlet weak var sharePageControl:UIPageControl!
    @IBOutlet weak var editView:EditTextAccessoryView!
    @IBOutlet weak var toolsScrollView:UIScrollView!
    
    @IBOutlet weak var bottomConstraint: NSLayoutConstraint!
    
    private var quoteLabel:TTTAttributedLabel!
    private var doc:UIDocumentInteractionController!
    private var pasteboard:UIPasteboard!
    
    private var didAppear = false
    private var fontPickerView:FontPickerView!
    private var lineSpacePickerView:ArrayPickerView<CGFloat>!
    private var widthPickerView:ArrayPickerView<Int>!
    private var textAlignPickerView:ArrayPickerView<NSTextAlignment>!
    
    override func viewDidLoad() {
        title = "Share"
        
        let fontToolbar = toolbar(title: "Font & Size", icon: R.image.changeFontButton())
        fontPickerView = FontPickerView()
        fontPickerView.accessoryView = fontToolbar
        fontPickerView.add(toViewController: self)
        
        let lineSpaceToolbar = toolbar(title: "Line Spacing", icon: R.image.lineSpaceDecButton())
        lineSpacePickerView = ArrayPickerView<CGFloat>()
        lineSpacePickerView.values = (-14).stride(through: 14, by: 2).map{ CGFloat($0) }
        lineSpacePickerView.startValue = 0
        lineSpacePickerView.titleForValue = { "\($0) pt" }
        lineSpacePickerView.accessoryView = lineSpaceToolbar
        lineSpacePickerView.add(toViewController: self)
        
        let widthToolbar = toolbar(title: "Width", icon: R.image.widthDecButton())
        widthPickerView = ArrayPickerView<Int>()
        widthPickerView.values = 20.stride(through: 100, by: 5).map{ $0 }
        widthPickerView.startValue = 100
        widthPickerView.titleForValue = { "\($0) %" }
        widthPickerView.accessoryView = widthToolbar
        widthPickerView.add(toViewController: self)
        
        let textAlignToolbar = toolbar(title: "Text Alignment", icon: R.image.centerAlignButton())
        textAlignPickerView = ArrayPickerView<NSTextAlignment>()
        textAlignPickerView.values = [.Left, .Center, .Right]
        textAlignPickerView.startValue = .Center
        textAlignPickerView.titleForValue = {
            switch $0 {
            case .Left: return "Left"
            case .Center: return "Center"
            case .Right: return "Right"
            default: return ""
            }
        }
        textAlignPickerView.accessoryView = textAlignToolbar
        textAlignPickerView.add(toViewController: self)
        
        // Connect editor tools
        fontToolbar.nextField = lineSpacePickerView.hiddenTextField
        lineSpaceToolbar.backField = fontPickerView.hiddenTextField
        lineSpaceToolbar.nextField = widthPickerView.hiddenTextField
        widthToolbar.backField = lineSpacePickerView.hiddenTextField
        widthToolbar.nextField = textAlignPickerView.hiddenTextField
        textAlignToolbar.backField = widthPickerView.hiddenTextField
        
        pasteboard = UIPasteboard.generalPasteboard()
        
        quoteLabel = TTTAttributedLabel(frame: CGRectZero)
        quoteLabel.textColor = .whiteColor()
        quoteLabel.numberOfLines = 0
        quoteLabel.textAlignment = .Center
        quoteLabel.lineBreakMode = .ByWordWrapping
        quoteLabel.layer.cornerRadius = 5
        quoteLabel.clipsToBounds = true
        quoteLabel.hidden = true
        self.contentView.addSubview(quoteLabel)
        
        let pan = UIPanGestureRecognizer(target: self, action: #selector(handlePan))
        self.quoteLabel.addGestureRecognizer(pan)
        
        let doubleTap = UITapGestureRecognizer(target: self, action: #selector(self.editQuote))
        doubleTap.numberOfTapsRequired = 2
        self.quoteLabel.addGestureRecognizer(doubleTap)
        
        shareScrollView.rx_contentOffset.map{ $0.x }.subscribeNext {[unowned self] x in
            let w = self.shareScrollView.frame.width
            self.sharePageControl.currentPage = Int(round(x / w))
        }.addDisposableTo(rx_disposeBag)
        
        let didCropImage = { [weak self] (image:UIImage) -> Void in
            self?.quoteImageView.image = image
            UIApplication.topMostVC?.dismiss()
        }
        
        let didSelectImage = { (image:UIImage) -> Void in
            if let parent = UIApplication.topMostVC as? UINavigationController {
                Navigator.push(MainRoute.Crop(image: image, action: didCropImage), parent: parent)
            }
        }
        
        changePicButton.rx_tap
            .track(AppEvents.shareGalleryOpen)
            .subscribeNext { [unowned self] in
            if let parent = self.navigationController {
                Navigator.present(MainRoute.Gallery(action: didSelectImage), parent: parent)
            }
        }.addDisposableTo(rx_disposeBag)        
        
        setupCloseButton()
        super.viewDidLoad()
    }
    
    override func viewWillAppear(animated: Bool) {
        self.view.addKeyboardPanningWithFrameBasedActionHandler(nil) {[unowned self] (keyboardRect, opening, closing) in
            let bottomSpace = max(0, self.view.bounds.h - keyboardRect.y)
            self.bottomConstraint.constant = bottomSpace
            
            self.view.setNeedsLayout()
            self.view.layoutIfNeeded()
            
            if closing {
                self.editView.hidden = true
            }
        }

        super.viewWillAppear(animated)
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        
        if didAppear { return }
        
        //showOverlay() TODO: Enable when I develop better overlays
        
        viewModel.initWidth(contentView.frame.w - 20)
        updateLabelSize(width: contentView.frame.w - 20)
        quoteLabel.center = contentView.center
        quoteLabel.hidden = false
        
        didAppear = true
    }
    
    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
        self.view.removeKeyboardControl()
    }
    
    func handlePan(sender: UIPanGestureRecognizer) {
        if sender.state == .Began {
            self.showLabel()
        } else if sender.state == .Ended {
            self.hideLabel()
        }
        
        let translation = sender.translationInView(self.view)
        sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x,
                                      y: sender.view!.center.y + translation.y)
        sender.setTranslation(CGPointZero, inView: self.view)
    }
    
    func updateLabelSize(width width:CGFloat? = nil) {
        // Center quote label
        let frame = quoteLabel.frame
        let size = quoteLabel.sizeThatFits(CGSize(width: width ?? frame.width, height: CGFloat.max))
        let w = min(contentView.frame.w, width ?? frame.width)
        quoteLabel.preferredMaxLayoutWidth = w
        quoteLabel.frame = CGRect(x: frame.x + (frame.w - w) / 2,
                                  y: frame.y,
                                  width: w,
                                  height: size.height)
    }
    
    override func bindToViewModel() {
        changeFontButton.rx_tap
            .track(AppEvents.shareFontChange)
            .subscribeNext { [unowned self] in
                self.fontPickerView.show()
            }.addDisposableTo(rx_disposeBag)
        
        decLineButton.rx_tap
            .track(AppEvents.shareLineSpacingChange)
            .subscribeNext {[unowned self] in
                self.lineSpacePickerView.show()
            }.addDisposableTo(rx_disposeBag)
        
        decWidthButton.rx_tap
            .track(AppEvents.shareWidthChange)
            .subscribeNext{[unowned self] in
                self.widthPickerView.show()
            }.addDisposableTo(rx_disposeBag)
        
        textAlignCenterButton.rx_tap
            .track(AppEvents.shareTextAlignmentChange)
            .subscribeNext{[unowned self] in
                self.textAlignPickerView.show()
            }.addDisposableTo(rx_disposeBag)
        
        // INPUTS
        viewModel.quote.bindTo(editView.rx_text)
            .addDisposableTo(rx_disposeBag)
        
        editView.rx_text.bindTo(viewModel.inputs.quote)
            .addDisposableTo(rx_disposeBag)
        
        lineSpacePickerView.rx_valueSelected
            .bindTo(viewModel.inputs.lineSpace)
            .addDisposableTo(rx_disposeBag)        
        
        widthPickerView.rx_valueSelected
            .bindTo(viewModel.inputs.width)
            .addDisposableTo(rx_disposeBag)
                
        textAlignPickerView.rx_valueSelected
            .bindTo(viewModel.inputs.textAlignment)
            .addDisposableTo(rx_disposeBag)
        
        toggleAuthorButton.rx_tap
            .track(AppEvents.shareAuthorToggle)
            .bindTo(viewModel.inputs.toggleAuthor)
            .addDisposableTo(rx_disposeBag)
        
        toggleOverlayButton.rx_tap
            .track(AppEvents.shareOverlayToggle)
            .bindTo(viewModel.inputs.toggleOverlay)
            .addDisposableTo(rx_disposeBag)
        
        facebookShareButton.rx_tap
            .track(AppEvents.shareWithFacebook)
            .bindTo(viewModel.inputs.facebookShare)
            .addDisposableTo(rx_disposeBag)
        
        messengerShareButton.rx_tap
            .track(AppEvents.shareWithMessenger)
            .bindTo(viewModel.inputs.messengerShare)
            .addDisposableTo(rx_disposeBag)
        
        whatsappShareButton.rx_tap
            .track(AppEvents.shareWithWhatsapp)
            .bindTo(viewModel.inputs.whastappShare)
            .addDisposableTo(rx_disposeBag)
        
        instagramShareButton.rx_tap
            .track(AppEvents.shareWithInstagram)
            .bindTo(viewModel.inputs.instagramShare)
            .addDisposableTo(rx_disposeBag)
        
        copyButton.rx_tap
            .track(AppEvents.shareQuoteCopy)
            .bindTo(viewModel.inputs.copyShare)
            .addDisposableTo(rx_disposeBag)
        
        shareButton.rx_tap
            .track(AppEvents.shareMoreActions)
            .bindTo(viewModel.inputs.moreShare)
            .addDisposableTo(rx_disposeBag)
        
        saveButton.rx_tap
            .track(AppEvents.shareImageSave)
            .bindTo(viewModel.inputs.saveShare)
            .addDisposableTo(rx_disposeBag)
        
        // OUTPUTS
        viewModel.quote.bindTo(rx_quote)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.author.bindTo(authorLabel.rx_text)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.font.bindTo(rx_quoteFont)
            .addDisposableTo(rx_disposeBag)
        
        // The font output must be binded first to change the font picker view state
        viewModel.font.bindTo(fontPickerView.rx_fontSelected)
            .addDisposableTo(rx_disposeBag)
        // Bind font picker view to view model input
        fontPickerView.rx_fontSelected.mapToOptional()
            .bindTo(viewModel.inputs.font)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.lineSpace.bindTo(rx_lineSpace)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.image.bindTo(quoteImageView.rx_image)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.width.bindTo(rx_width)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.overlayLevel.bindTo(rx_overlayLevel)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.authorVisible.bindTo(rx_authorVisible)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.textAlignment.bindTo(rx_textAlignment)
            .addDisposableTo(rx_disposeBag)
        
        viewModel.facebookShare.subscribeNext {[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
            Async.main(after: 1){
                self?.showFacebookShare(self?.contentView.takeSnapshot())
            }
        }.addDisposableTo(rx_disposeBag)
        
        viewModel.messengerShare.subscribeNext {[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
            Async.main(after: 1){
                self?.showMessengerShare(self?.contentView.takeSnapshot())
            }
        }.addDisposableTo(rx_disposeBag)
        
        viewModel.whatsappShare.subscribeNext {[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
            Async.main(after: 1){
                self?.showWhatsappShare(self?.contentView.takeSnapshot())
            }
        }.addDisposableTo(rx_disposeBag)
        
        viewModel.instagramShare.subscribeNext {[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
            Async.main(after: 1){
                self?.showInstagramShare(self?.contentView.takeSnapshot())
            }
        }.addDisposableTo(rx_disposeBag)
        
        viewModel?.copyShare.subscribeNext{[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
        }.addDisposableTo(rx_disposeBag)
        
        viewModel?.moreShare.subscribeNext{[weak self] (quote, author) in
            self?.copyQuote(quote:quote, author: author)
            Async.main(after: 1){
                self?.showMoreShare(self?.contentView.takeSnapshot())
            }
        }.addDisposableTo(rx_disposeBag)
        
        viewModel?.saveShare.subscribeNext{[weak self] (quote, author) in
            self?.requestAndSaveImage(self?.contentView.takeSnapshot())
        }.addDisposableTo(rx_disposeBag)
        
        super.bindToViewModel()
    }
    
    private func animateTools() {
        UIView.animateWithDuration(0.3, delay: 0.3, options: [], animations: { [unowned self] in
            self.toolsScrollView.contentOffset = CGPoint(x: 60, y: 0)
        }, completion: { [unowned self] _ in
            self.toolsScrollView.setContentOffset(CGPointZero, animated: true)
        })
    }
    
    private func flashLabel() {
        UIView.animateWithDuration(0.1, animations: { [unowned self] in
            self.quoteLabel.layer.backgroundColor = UIColor(white: 1, alpha: 0.3).CGColor
        }, completion: { _ in
            UIView.animateWithDuration(0.5) { [unowned self] in
                self.quoteLabel.layer.backgroundColor = UIColor(white: 1, alpha: 0.0).CGColor
            }
        })
    }
    
    private func showLabel() {
        UIView.animateWithDuration(0.4) { [unowned self] in
            self.quoteLabel.layer.backgroundColor = UIColor(white: 1, alpha: 0.3).CGColor
        }
    }
    
    private func hideLabel() {
        UIView.animateWithDuration(0.4) { [unowned self] in
            self.quoteLabel.layer.backgroundColor = UIColor(white: 1, alpha: 0.0).CGColor
        }
    }
    
    @objc private func editQuote() {
        track(AppEvents.shareQuoteEdit)
        self.editView.hidden = false
        self.editView.startEditing()
    }
    
    private func showOverlay() {
        if AppSession().didShowShareOverlay { return }
        
        if let parent = UIApplication.topMostVC {
            Async.main(after:1) {
                Navigator.present(MainRoute.ShareOverlay, parent: parent, wrap: false, transitionStyle: .CrossDissolve)
            }
        }
    }
    
    private func toolbar(title title:String, icon:UIImage?) -> EditorToolbar {
        let toolbar = EditorToolbar(frame: CGRect(x: 0, y: 0, width: self.view.w, height: 44))
        toolbar.title = title
        toolbar.icon = icon
        return toolbar
    }
}

// MARK: Share Extensions

extension ShareViewController {
    private func copyQuote(quote quote:String, author:String) {
        pasteboard.string = "\(quote) - \(author)"
        SVProgressHUD.showSuccessWithStatus("Quote copied!")
    }
    
    private func showFacebookShare(image:UIImage?) {
        let photo = FBSDKSharePhoto(image: image!, userGenerated: true)
        
        let content = FBSDKSharePhotoContent()
        content.photos = [photo]
        
        let dialog = FBSDKShareDialog()
        dialog.fromViewController = self
        dialog.shareContent = content
        dialog.mode = .Native
        dialog.show()
    }
    
    private func showMessengerShare(image:UIImage?) {
        let photo = FBSDKSharePhoto(image: image!, userGenerated: true)
        
        let content = FBSDKSharePhotoContent()
        content.photos = [photo]
        
        FBSDKMessageDialog.showWithContent(content, delegate: nil)
    }
    
    private func showMoreShare(image:UIImage?) {
        if
            let imageURL = image?.saveAsJPEG(withName: "share.jpg") {
            doc = UIDocumentInteractionController(URL: imageURL)
            doc.presentOpenInMenuFromRect(self.view.bounds, inView: self.view, animated: true)
        }
    }
    
    private func showWhatsappShare(image:UIImage?) {
        if
            let imageURL = image?.saveAsJPEG(withName: "share.wai"),
            let appURL = NSURL(string:"whatsapp://app")
            where UIApplication.sharedApplication().canOpenURL(appURL) {
            doc = UIDocumentInteractionController(URL: imageURL)
            doc.UTI = "net.whatsapp.image"
            doc.presentOpenInMenuFromRect(self.view.bounds, inView: self.view, animated: true)
        }
    }
    
    private func showInstagramShare(image:UIImage?) {
        if
            let imageURL = image?.saveAsJPEG(withName: "igo"),
            let appURL = NSURL(string:"instagram://app")
            where UIApplication.sharedApplication().canOpenURL(appURL) {
            doc = UIDocumentInteractionController(URL: imageURL)
            doc.UTI = "com.instagram.exclusivegram"
            doc.presentOpenInMenuFromRect(self.view.bounds, inView: self.view, animated: true)
        }
        
    }
    
    private func requestAndSaveImage(imageOrNil:UIImage?) {
        if Permission.Photos.status == .Authorized {
            if let image = imageOrNil {
                self.saveImage(image)
            }
        } else {
            Permission.Photos.request{[weak self] (status) in
                if let image = imageOrNil where status == .Authorized {
                    self?.saveImage(image)
                }
            }
        }
    }
    
    private func saveImage(image:UIImage) {
        PHPhotoLibrary.sharedPhotoLibrary().performChanges({ 
            PHAssetChangeRequest.creationRequestForAssetFromImage(image)
        }, completionHandler:  { (success, error) in
            if success {
                SVProgressHUD.showSuccessWithStatus("Image saved!")
            } else {
                let alert = UIAlertController(title: "Could not save image to gallery",
                    message:"An error happened when we tried to save the image into your gallery. Try again later.",
                    preferredStyle: .Alert)
                
                alert.addAction(UIAlertAction(title: "Ok", style: .Cancel, handler: nil))
                self.navigationController?.presentViewController(alert, animated: true, completion: nil)
            }
        })
    }
}

// MARK: Rx Extensions

extension ShareViewController {
    var rx_quote:AnyObserver<String> {
        return UIBindingObserver(UIElement: self) { (vc, text) in
            vc.quoteLabel.text = text
            vc.updateLabelSize()
        }.asObserver()
    }
    
    var rx_quoteFont:AnyObserver<UIFont> {
        return UIBindingObserver(UIElement: self){ (vc, font) in
            vc.quoteLabel.font = font
            vc.quoteLabel.text = vc.quoteLabel.text
            vc.updateLabelSize(width: vc.quoteLabel.frame.w)
            vc.flashLabel()
        }.asObserver()
    }
    
    var rx_lineSpace:AnyObserver<CGFloat> {
        return UIBindingObserver(UIElement: self){ (vc, space) in
            vc.quoteLabel.lineSpacing = space
            vc.quoteLabel.text = vc.quoteLabel.text
            vc.updateLabelSize(width: vc.quoteLabel.frame.w)
            vc.flashLabel()
        }.asObserver()
    }
    
    var rx_width:AnyObserver<CGFloat> {
        return UIBindingObserver(UIElement: self){ (vc, width) in
            vc.updateLabelSize(width: width)
            vc.flashLabel()
        }.asObserver()
    }
    
    var rx_overlayLevel:AnyObserver<Int> {
        return UIBindingObserver(UIElement: self) { (vc, level) in
            let overlayIcon = { () -> UIImage? in
                switch level {
                case 1: return R.image.toggleOverlay25Button()
                case 2: return R.image.toggleOverlay50Button()
                case 3: return R.image.toggleOverlay75Button()
                default: return R.image.toggleOverlay0Button()
                }
            }()
            
            vc.toggleOverlayButton.setImage(overlayIcon, forState: .Normal)
            
            UIView.animateWithDuration(0.3){
                vc.overlayView.backgroundColor = UIColor.blackColor()
                    .colorWithAlphaComponent(0.25 * CGFloat(level))
            }
        }.asObserver()
    }
    
    var rx_authorVisible:AnyObserver<Bool> {
        return UIBindingObserver(UIElement: self) { (cell, visible) in
            cell.authorLabel.hidden = !visible
            cell.toggleAuthorButton.tintColor = visible ? UIColor.flatSkyBlueColorDark() : UIColor.lightGrayColor()
        }.asObserver()
    }
    
    var rx_textAlignment:AnyObserver<NSTextAlignment> {
        return UIBindingObserver(UIElement: self) { (vc, alignment) in
            vc.quoteLabel.textAlignment = alignment
            
            let image = { Void -> UIImage? in
                switch alignment {
                case .Left: return R.image.leftAlignButton()
                case .Center: return R.image.centerAlignButton()
                case .Right: return R.image.rightAlignButton()
                default: return nil
                }
            }()
            
            vc.textAlignCenterButton.setImage(image, forState: .Normal)
        }.asObserver()
    }
}

class ShareViewModel:RxViewModel {
    let inputs = (
        quote:Variable(""),
        font:Variable<UIFont?>(nil),
        lineSpace:Variable<CGFloat>(0.0),
        width:Variable<Int>(100),
        textAlignment:Variable<NSTextAlignment>(.Center),
        toggleAuthor:PublishSubject<Void>(),
        toggleOverlay:PublishSubject<Void>(),
        facebookShare:PublishSubject<Void>(),
        instagramShare:PublishSubject<Void>(),
        whastappShare:PublishSubject<Void>(),
        messengerShare:PublishSubject<Void>(),
        copyShare:PublishSubject<Void>(),
        saveShare:PublishSubject<Void>(),
        moreShare:PublishSubject<Void>()
    )
    
    var quote:Observable<String>!
    var author:Observable<String>!
    var authorVisible:Observable<Bool>!
    var font:Observable<UIFont>!
    var lineSpace:Observable<CGFloat>!
    var width:Observable<CGFloat>!
    var overlayLevel:Observable<Int>!
    var image:Observable<UIImage?>!
    var textAlignment:Observable<NSTextAlignment>!
    
    var facebookShare:Observable<(quote:String, author:String)>!
    var instagramShare:Observable<(quote:String, author:String)>!
    var whatsappShare:Observable<(quote:String, author:String)>!
    var messengerShare:Observable<(quote:String, author:String)>!
    var copyShare:Observable<(quote:String, author:String)>!
    var saveShare:Observable<(quote:String, author:String)>!
    var moreShare:Observable<(quote:String, author:String)>!
    
    private let authorVar = Variable("")
    private let overlayLevelVar = Variable(1)
    private let authorVisibleVar = Variable(true)
    private let imageVar = Variable<UIImage?>(nil)
    private var maxWidth:CGFloat = 0.0
    private let fontIndex = Variable(0)
    
    init(quote:String, author:String, font:UIFont, image:UIImage) {
        super.init()
        
        inputs.quote.value = quote
        
        authorVar.value = author
        
        inputs.font.value = font
                
        imageVar.value = image
        
        self.quote = inputs.quote.asObservable().distinctUntilChanged()
        
        self.author = authorVar.asObservable()
        
        self.font = inputs.font.asObservable().filterNil()
        
        self.lineSpace = inputs.lineSpace.asObservable()
        
        self.width = inputs.width.asObservable()
            .map{[unowned self] w in self.maxWidth * CGFloat(w) / 100.0  }
        
        self.overlayLevel = overlayLevelVar.asObservable()
        
        self.authorVisible = authorVisibleVar.asObservable()
        
        self.image = imageVar.asObservable()
        
        self.textAlignment = inputs.textAlignment.asObservable()
        
        let quoteAndAuthor$ = Observable.combineLatest(self.quote, self.author) { (quote:$0, author:$1) }
        
        inputs.toggleAuthor.withLatestFrom(self.authorVisible)
            .subscribeNext{ [unowned self] visible in
                self.authorVisibleVar.value = !visible
            }.addDisposableTo(rx_disposeBag)
        
        inputs.toggleOverlay.withLatestFrom(self.overlayLevel)
            .subscribeNext{ [unowned self] level in
                self.overlayLevelVar.value = level == 3 ? 0 : level + 1
            }.addDisposableTo(rx_disposeBag)
        
        facebookShare = inputs.facebookShare.withLatestFrom(quoteAndAuthor$)
        
        instagramShare = inputs.instagramShare.withLatestFrom(quoteAndAuthor$)
        
        messengerShare = inputs.messengerShare.withLatestFrom(quoteAndAuthor$)
        
        whatsappShare = inputs.whastappShare.withLatestFrom(quoteAndAuthor$)
        
        copyShare = inputs.copyShare.withLatestFrom(quoteAndAuthor$)
        
        saveShare = inputs.saveShare.withLatestFrom(quoteAndAuthor$)
        
        moreShare = inputs.moreShare.withLatestFrom(quoteAndAuthor$)
    }
    
    func initWidth(width:CGFloat) {
        self.maxWidth = width
    }
}