space-ios/iOSClient/Offline/NCOffline.swift

//
//  NCOffline.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
import NextcloudKit

class NCOffline: NCCollectionViewCommon {

    // MARK: - View Life Cycle

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        titleCurrentFolder = NSLocalizedString("_manage_file_offline_", comment: "")
        layoutKey = NCGlobal.shared.layoutViewOffline
        enableSearchBar = false
        headerMenuButtonsView = true
        headerRichWorkspaceDisable = true
        emptyImage = UIImage(named: "folder")?.image(color: NCBrandColor.shared.brandElement, size: UIScreen.main.bounds.width)
        emptyTitle = "_files_no_files_"
        emptyDescription = "_tutorial_offline_view_"
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        navigationController?.setFileAppreance()
    }

    // MARK: - DataSource + NC Endpoint

    override func queryDB(isForced: Bool) {

        var ocIds: [String] = []
        var metadatas: [tableMetadata] = []

        if self.serverUrl.isEmpty {
            if let directories = NCManageDatabase.shared.getTablesDirectory(predicate: NSPredicate(format: "account == %@ AND offline == true", self.appDelegate.account), sorted: "serverUrl", ascending: true) {
                for directory: tableDirectory in directories {
                    ocIds.append(directory.ocId)
                }
            }
            let files = NCManageDatabase.shared.getTableLocalFiles(predicate: NSPredicate(format: "account == %@ AND offline == true", self.appDelegate.account), sorted: "fileName", ascending: true)
            for file in files {
                ocIds.append(file.ocId)
            }
            metadatas = NCManageDatabase.shared.getMetadatas(predicate: NSPredicate(format: "account == %@ AND ocId IN %@", self.appDelegate.account, ocIds))
        } else {
            metadatas = NCManageDatabase.shared.getMetadatas(predicate: NSPredicate(format: "account == %@ AND serverUrl == %@", self.appDelegate.account, self.serverUrl))
        }

        self.dataSource = NCDataSource(
            metadatas: metadatas,
            account: self.appDelegate.account,
            sort: self.layoutForView?.sort,
            ascending: self.layoutForView?.ascending,
            directoryOnTop: self.layoutForView?.directoryOnTop,
            favoriteOnTop: true,
            filterLivePhoto: true,
            groupByField: self.groupByField,
            providers: self.providers,
            searchResults: self.searchResults)
    }

    override func reloadDataSource(isForced: Bool = true) {
        super.reloadDataSource()

        DispatchQueue.global().async {
            self.queryDB(isForced: isForced)
            DispatchQueue.main.async {
                self.refreshControl.endRefreshing()
                self.collectionView.reloadData()
            }
        }
    }

    override func reloadDataSourceNetwork(isForced: Bool = false) {
        super.reloadDataSourceNetwork(isForced: isForced)

        guard !serverUrl.isEmpty else {
            self.reloadDataSource()
            return
        }

        isReloadDataSourceNetworkInProgress = true
        collectionView?.reloadData()

        networkReadFolder(isForced: isForced) { tableDirectory, metadatas, metadatasUpdate, metadatasDelete, error in
            if error == .success, let metadatas = metadatas {
                for metadata in metadatas where (!metadata.directory && NCManageDatabase.shared.isDownloadMetadata(metadata, download: true)) {
                    NCOperationQueue.shared.download(metadata: metadata, selector: NCGlobal.shared.selectorDownloadFile)
                }
            }

            DispatchQueue.main.async {
                self.refreshControl.endRefreshing()
                self.isReloadDataSourceNetworkInProgress = false
                self.richWorkspaceText = tableDirectory?.richWorkspace
                if metadatasUpdate?.count ?? 0 > 0 || metadatasDelete?.count ?? 0 > 0 || isForced {
                    self.reloadDataSource()
                } else {
                    self.collectionView?.reloadData()
                }
            }
        }
    }
}