space-ios/iOSClient/Main/Collection Common/NCListCell.swift

//
//  NCListCell.swift
//  Nextcloud
//
//  Created by Marino Faggiana on 24/10/2018.
//  Copyright © 2018 Marino Faggiana. All rights reserved.
//
//  Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

import UIKit

class NCListCell: UICollectionViewCell, UIGestureRecognizerDelegate, NCCellProtocol {
    
    @IBOutlet weak var imageItem: UIImageView!
    @IBOutlet weak var imageItemLeftConstraint: NSLayoutConstraint!
    
    @IBOutlet weak var imageSelect: UIImageView!
    @IBOutlet weak var imageStatus: UIImageView!
    @IBOutlet weak var imageFavorite: UIImageView!
    @IBOutlet weak var imageLocal: UIImageView!

    @IBOutlet weak var labelTitle: UILabel!

    @IBOutlet weak var labelInfo: UILabel!

    @IBOutlet weak var imageShared: UIImageView!
    @IBOutlet weak var buttonShared: UIButton!

    @IBOutlet weak var imageMore: UIImageView!
    @IBOutlet weak var buttonMore: UIButton!
    
    @IBOutlet weak var progressView: UIProgressView!
    
    @IBOutlet weak var separator: UIView!
    @IBOutlet weak var separatorHeightConstraint: NSLayoutConstraint!

    var filePreviewImageView : UIImageView? {
        get{
            return imageItem
        }
    }
    var avatarImageView: UIImageView? {
        get{
            return imageShared
        }
    }
    
    var delegate: NCListCellDelegate?
    var objectId = ""
    var indexPath = IndexPath()
    var namedButtonMore = ""

    override func awakeFromNib() {
        super.awakeFromNib()
               
        imageItem.layer.cornerRadius = 6
        imageItem.layer.masksToBounds = true
        
        progressView.tintColor = NCBrandColor.shared.brandElement
        progressView.transform = CGAffineTransform(scaleX: 1.0, y: 0.5)
        progressView.trackTintColor = .clear

        let longPressedGesture = UILongPressGestureRecognizer(target: self, action: #selector(longPress(gestureRecognizer:)))
        longPressedGesture.minimumPressDuration = 0.5
        longPressedGesture.delegate = self
        longPressedGesture.delaysTouchesBegan = true
        self.addGestureRecognizer(longPressedGesture)
        
        let longPressedGestureMore = UILongPressGestureRecognizer(target: self, action: #selector(longPressInsideMore(gestureRecognizer:)))
        longPressedGestureMore.minimumPressDuration = 0.5
        longPressedGestureMore.delegate = self
        longPressedGestureMore.delaysTouchesBegan = true
        buttonMore.addGestureRecognizer(longPressedGestureMore)
        
        separator.backgroundColor = NCBrandColor.shared.separator
        separatorHeightConstraint.constant = 0.5
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        imageItem.backgroundColor = nil
    }
    
    @IBAction func touchUpInsideShare(_ sender: Any) {
        delegate?.tapShareListItem(with: objectId, sender: sender)
    }
    
    @IBAction func touchUpInsideMore(_ sender: Any) {
        delegate?.tapMoreListItem(with: objectId, namedButtonMore: namedButtonMore, image: imageItem.image, sender: sender)
    }
    
    @objc func longPressInsideMore(gestureRecognizer: UILongPressGestureRecognizer) {
        delegate?.longPressMoreListItem(with: objectId, namedButtonMore: namedButtonMore, gestureRecognizer: gestureRecognizer)
    }
    
    @objc func longPress(gestureRecognizer: UILongPressGestureRecognizer) {
        delegate?.longPressListItem(with: objectId, gestureRecognizer: gestureRecognizer)
    }
    
    func setButtonMore(named: String, image: UIImage) {
        namedButtonMore = named
        imageMore.image = image
    }
    
    func hideButtonMore(_ status: Bool) {
        imageMore.isHidden = status
        buttonMore.isHidden = status
    }
    
    func hideButtonShare(_ status: Bool) {
        imageShared.isHidden = status
        buttonShared.isHidden = status
    }
    
    func selectMode(_ status: Bool) {
        if status {
            imageItemLeftConstraint.constant = 45
            imageSelect.isHidden = false
        } else {
            imageItemLeftConstraint.constant = 10
            imageSelect.isHidden = true
            backgroundView = nil
        }
    }
    
    func selected(_ status: Bool) {
        if status {
            imageSelect.image = NCBrandColor.cacheImages.checkedYes
            let blurEffect = UIBlurEffect(style: .extraLight)
            let blurEffectView = UIVisualEffectView(effect: blurEffect)
            blurEffectView.frame = self.bounds
            blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
            blurEffectView.backgroundColor = .lightGray
            backgroundView = blurEffectView
            separator.isHidden = true
        } else {
            imageSelect.image = NCBrandColor.cacheImages.checkedNo
            backgroundView = nil
            separator.isHidden = false
        }
    }
}

protocol NCListCellDelegate {
    func tapShareListItem(with objectId: String, sender: Any)
    func tapMoreListItem(with objectId: String, namedButtonMore: String, image: UIImage?, sender: Any)
    func longPressMoreListItem(with objectId: String, namedButtonMore: String, gestureRecognizer: UILongPressGestureRecognizer)
    func longPressListItem(with objectId: String, gestureRecognizer: UILongPressGestureRecognizer)
}

// optional func
extension NCListCellDelegate {
    func tapShareListItem(with objectId: String, sender: Any) {}
    func tapMoreListItem(with objectId: String, namedButtonMore: String, image: UIImage?, sender: Any) {}
    func longPressMoreListItem(with objectId: String, namedButtonMore: String, gestureRecognizer: UILongPressGestureRecognizer) {}
    func longPressListItem(with objectId: String, gestureRecognizer: UILongPressGestureRecognizer) {}
}

// MARK: - List Layout

class NCListLayout: UICollectionViewFlowLayout {
    
    var itemHeight: CGFloat = 60
    
    // MARK: - View Life Cycle

    override init() {
        super.init()
        
        sectionHeadersPinToVisibleBounds = false
        
        minimumInteritemSpacing = 0
        minimumLineSpacing = 1
        
        self.scrollDirection = .vertical
        self.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override var itemSize: CGSize {
        get {
            if let collectionView = collectionView {
                let itemWidth: CGFloat = collectionView.frame.width
                return CGSize(width: itemWidth, height: self.itemHeight)
            }
            
            // Default fallback
            return CGSize(width: 100, height: 100)
        }
        set {
            super.itemSize = newValue
        }
    }
    
    override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint) -> CGPoint {
        return proposedContentOffset
    }
}