saveiconPost() methods

newPostVC 430pm

//
//  NewPostViewController.swift
//  didyoulift
//
//  Created by Alan Jaw on 3/2/16.
//  Copyright © 2016 Alan Jaw. All rights reserved.
//

import UIKit
import Firebase

class NewPostViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    var currentUsername = ""
    var didYouGym: Bool?
    var commentText: String?
    var alreadyPostedToday: Bool = false
    var userTodaysPostKey:String?
    
    var iconFileNames = [String]()
    
    var selectedPicName: String?
    
    @IBOutlet weak var collectionView: UICollectionView!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        let cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "dismissCurrentVC")
        navigationItem.leftBarButtonItem = cancelButton
        
        let addPhotoButton = UIBarButtonItem(title: "Add Photo", style: UIBarButtonItemStyle.Plain, target: self, action: "addPhoto")
        navigationItem.rightBarButtonItem = addPhotoButton

        
        DataService.dataService.CURRENT_USER_REF.observeEventType(FEventType.Value, withBlock: { snapshot in
            
            let currentUser = snapshot.value.objectForKey("displayName") as! String
            
            self.currentUsername = currentUser
            }, withCancelBlock: { error in
                print(error.description)
        })
        
        collectionView.delegate = self
        collectionView.dataSource = self
        
        // populate the icons array
        let fileManager = NSFileManager.defaultManager()
        let path = NSBundle.mainBundle().resourcePath!
        let items = try! fileManager.contentsOfDirectoryAtPath(path)
        
        for item in items {
            if item.hasSuffix("png") {
                
                iconFileNames.append(item)
            }
        }
    }
    
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    func savePost(picFile: String) {

        // get todays date
        let currentDate = NSDate()
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = NSDateFormatterStyle.FullStyle
        let currentDateString = dateFormatter.stringFromDate(currentDate)
        
        let uid = NSUserDefaults.standardUserDefaults().objectForKey("uid")
        
        // if user is posting, automatically set didYouGym to true  (for now)
        // later we will add functionaltiy for false (rest, tired, etc.)
        didYouGym = true
        
        let gymPostDic: Dictionary<String, AnyObject> = [
            "didYouLift": didYouGym!,
            "text": self.commentText!,
            "username": currentUsername,
            "date": currentDateString,
            "uid": uid!,
            "photoBase64": picFile
        ]
        
        if !alreadyPostedToday {
            // add comment to gymPost and save
            DataService.dataService.createNewGymPost(gymPostDic)
            alreadyPostedToday = true
            dismissCurrentVC()

        }
        else {
            //userTodaysPostKey shouldn't be nil - set in HomeViewController if user has posted already
            // update existing post - get today's post's childID
            DataService.dataService.updateGymPost(gymPostDic, childPostID: userTodaysPostKey!)
        
            // alert user they've already posted today
            updatedPostAlert()
        }
    }

    // MARK: UIImagePickerController

    func imagePickerControllerDidCancel(picker: UIImagePickerController) {
        dismissViewControllerAnimated(true, completion: nil)
    }
    
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        
        var newImage: UIImage

        if let possibleImage = info["UIImagePickerControllerEditedImage"] as? UIImage {
            newImage = possibleImage
        }
        else if let possibleImage = info["UIImagePickerControllerOriginalImage"] as? UIImage {
            newImage = possibleImage
        }
        else {
            return
        }
        
        if let jpegData:NSData = UIImageJPEGRepresentation(newImage, 80) {
            
            let base64String = jpegData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)
            self.selectedPicName = base64String
        }
        dismissViewControllerAnimated(true, completion: nil)
        

    }
    
    func addPhoto() {
        let picker = UIImagePickerController()
        picker.allowsEditing = true
        picker.delegate = self
        presentViewController(picker, animated: true, completion: nil)
    }
    
    
    // MARK: - Navigation
    
    func dismissCurrentVC() {
        dismissViewControllerAnimated(true, completion: nil)
    }

    // MARK: - Alerts
    
    func presentAddCommentAlert() {
        let alertController = UIAlertController(title: "Add Comment", message: nil, preferredStyle: .Alert)
        
        let saveAction = UIAlertAction(title: "Save",
            style: .Default) { [unowned self](action: UIAlertAction) -> Void in
                
                let comment = alertController.textFields![0]
                self.commentText = comment.text
                
                self.savePost(self.selectedPicName!)
        }
        let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        
        alertController.addTextFieldWithConfigurationHandler {
            (comment) -> Void in
            comment.placeholder = "Add a Comment"
        }
        
        alertController.addAction(saveAction)
        alertController.addAction(cancelAction)
        presentViewController(alertController, animated: true, completion: nil)
    }
    
    func updatedPostAlert() {
        let alertController = UIAlertController(title: "Updated Today's Post", message: nil, preferredStyle: .Alert)
        let okAction = UIAlertAction(title: "OK", style: .Cancel) { (action) -> Void in
            self.dismissCurrentVC()
        }

        alertController.addAction(okAction)

        presentViewController(alertController, animated: true, completion: nil)
        
    }

    // MARK: UICollectionView
    
    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return iconFileNames.count
    }
    
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        
        var iconStringName = iconFileNames[indexPath.row]
        
        let icon = Icon()
        let fileSuffixRange = iconStringName.endIndex.advancedBy(-4)..<iconStringName.endIndex
        var captionString = iconStringName // makes a copy
        captionString.removeRange(fileSuffixRange)
        
        icon.imageFileName = iconStringName
        icon.description = captionString
        icon.workout = true
        
        if let cell = collectionView.dequeueReusableCellWithReuseIdentifier(IconReuseIdentifier, forIndexPath: indexPath) as? IconCell {
            
            cell.configureCell(icon)
            cell.contentView.frame = cell.bounds

            return cell
        }
        else {
            return IconCell()
        }
    }
    
    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
        
        selectedIconFileName = iconFileNames[indexPath.row]
        presentAddCommentAlert()
    }
}