ShareObject.swift

//
//  ShareObject.swift
//
//  Created by Kalpesh Talkar on 28/05/16.
//  Copyright © 2016 Kalpesh. All rights reserved.
//

import UIKit

@IBDesignable class ShareObject: NSObject {
    
    // MARK: - variables
    @IBOutlet weak var viewController: UIViewController!
    @IBOutlet weak var barButtonItem: UIBarButtonItem?
    @IBOutlet weak var sourceView: UIView?

    @IBInspectable var shareText : String?
    @IBInspectable var isUrl : Bool = false
    @IBInspectable var shareImage : UIImage?
    
    // MARK:- init methods
    override init() {
        super.init()
    }
    
    init(viewController: UIViewController, sourceView: UIView) {
        super.init()
        self.viewController = viewController
        self.sourceView = sourceView
    }
    
    init(viewController: UIViewController, barButtonItem: UIBarButtonItem) {
        super.init()
        self.viewController = viewController
        self.barButtonItem = barButtonItem
    }
    
    // MARK: - share methods
    @IBAction func share(sender: AnyObject) {
        var shareData : [AnyObject] = []
        
        if shareText != nil && shareText! != "" {
            if isUrl {
                let url = NSURL(string: shareText!)
                if url != nil && UIApplication.sharedApplication().canOpenURL(url!) {
                    shareData.append(url!)
                } else {
                    shareData.append(shareText!)
                }
            } else {
                shareData.append(shareText!)
            }
        }
        
        if shareImage != nil {
            shareData.append(shareImage!)
        }
        
        shareContents(shareData)
    }
    
    func shareText(text : String) {
        shareContents([text])
    }
    
    func shareURL(url : NSURL) {
        shareContents([url])
    }
    
    func shareImage(image : UIImage) {
        shareContents([image])
    }
    
    func shareContents(shareData : [AnyObject]) {
        if shareData.count > 0 {
            let activityVC = UIActivityViewController(activityItems: shareData, applicationActivities: nil)
            if barButtonItem != nil {
                activityVC.popoverPresentationController?.barButtonItem = barButtonItem
            }
            if sourceView != nil {
                activityVC.popoverPresentationController?.sourceView = sourceView
            }
            viewController.presentViewController(activityVC, animated: true, completion: nil)
            
        } else {
            let alert = UIAlertController(title: "Error", message: "Unable to launch share activity. No contents selected to share", preferredStyle: .Alert)
            let ok = UIAlertAction(title: "OK", style: .Default, handler: nil)
            alert.addAction(ok)
            viewController.presentViewController(alert, animated: true, completion: nil)
        }
    }

}