Mobile map (search and route)

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//
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import UIKit
import ArcGIS

protocol MapPackageCellDelegate: AnyObject {
    func mapPackageCell(_ mapPackageCell: MapPackageCell, didSelectMap map: AGSMap)
}

class MapPackageCell: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegate {
    @IBOutlet var titleLabel: UILabel!
    @IBOutlet var collectionView: UICollectionView!

    @IBOutlet var collectionViewHeightConstraint: NSLayoutConstraint!
    @IBOutlet var collectionViewTopConstraint: NSLayoutConstraint!

    weak var delegate: MapPackageCellDelegate?

    var isCollapsed = true {
        didSet {
            isCollapsed ? self.collapseCell() : self.expandCell()
        }
    }

    var mapPackage: AGSMobileMapPackage! {
        didSet {
            self.loadMapPackage()
        }
    }

    func loadMapPackage() {
        self.mapPackage.load { [weak self] (error: Error?) in
            if let error = error {
                print(error.localizedDescription)
            } else {
                // update title label
                self?.titleLabel.text = self?.mapPackage.item?.title

                self?.collectionView.reloadData()
            }
        }
    }

    func expandCell() {
        self.collectionViewTopConstraint.constant = 8
        self.collectionViewHeightConstraint.constant = 110
    }

    func collapseCell() {
        self.collectionViewTopConstraint.constant = 0
        self.collectionViewHeightConstraint.constant = 0
    }

    // MARK: - UICollectionViewDataSource

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.mapPackage?.maps.count ?? 0
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MobileMapCell", for: indexPath)

        // label
        let label = cell.viewWithTag(11) as! UILabel
        label.text = "Map \(indexPath.item + 1)"

        // border
        cell.layer.borderColor = UIColor.black.cgColor
        cell.layer.borderWidth = 1

        // search image view
        let searchImageView = cell.viewWithTag(12) as! UIImageView
        searchImageView.isHidden = (self.mapPackage.locatorTask == nil)

        let map = self.mapPackage.maps[indexPath.item]
        // route image view
        let routeImageView = cell.viewWithTag(13) as! UIImageView
        routeImageView.isHidden = map.transportationNetworks.isEmpty

        // thumbnail
        let imageView = cell.viewWithTag(14) as! UIImageView
        imageView.image = map.item?.thumbnail?.image
        imageView.layer.borderColor = UIColor.gray.cgColor
        imageView.layer.borderWidth = 1

        return cell
    }

    // MARK: - UICollectionViewDelegate

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        self.delegate?.mapPackageCell(self, didSelectMap: self.mapPackage.maps[indexPath.item])
    }
}