space-ios/iOSClient/Main/Collection Common/NCCollectionViewCommon+MediaLayout.swift

//
//  NCCollectionViewCommon+MediaLayout.swift
//  Nextcloud
//
//  Created by Marino Faggiana on 13/07/24.
//  Copyright © 2024 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 Foundation
import UIKit
import NextcloudKit

extension NCCollectionViewCommon: NCMediaLayoutDelegate {
    func getColumnCount() -> Int {
        if let column = self.layoutForView?.columnPhoto, column > 0 {
            return column
        }
        self.layoutForView?.columnPhoto = 3
        return 3
    }

    func getLayout() -> String? {
        return NCManageDatabase.shared.getLayoutForView(account: appDelegate.account, key: NCGlobal.shared.layoutViewFiles, serverUrl: serverUrl)?.layout
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, heightForHeaderInSection section: Int) -> Float {
        return Float(sizeForHeaderInSection(section: section).height)
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, heightForFooterInSection section: Int) -> Float {
        return Float(sizeForFooterInSection(section: section).height)
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, insetForSection section: Int) -> UIEdgeInsets {
        return .zero
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, insetForHeaderInSection section: Int) -> UIEdgeInsets {
        return .zero
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, insetForFooterInSection section: Int) -> UIEdgeInsets {
        return .zero
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, minimumInteritemSpacingForSection section: Int) -> Float {
        return 1.0
    }

    func collectionView(_ collectionView: UICollectionView, layout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath, columnCount: Int, typeLayout: String) -> CGSize {
        let size = CGSize(width: collectionView.frame.width / CGFloat(columnCount), height: collectionView.frame.width / CGFloat(columnCount))
        if typeLayout == NCGlobal.shared.layoutPhotoRatio {
            let metadata = self.dataSource.metadatas[indexPath.row]

            if metadata.imageSize != CGSize.zero {
                return metadata.imageSize
            } else if let size = NCImageCache.shared.getPreviewSizeCache(ocId: metadata.ocId, etag: metadata.etag) {
                return size
            }
        }
        return size
    }
}