element-ios/Riot/Modules/Room/Views/BubbleCells/Styles/Bubble/BubbleRoomTimelineStyle.swift

// 
// Copyright 2021 New Vector Ltd
//
// 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

class BubbleRoomTimelineStyle: RoomTimelineStyle {
    
    // MARK: - Properties
    
    // MARK: Private
    
    private var theme: Theme
    
    // MARK: Public
    
    let identifier: RoomTimelineStyleIdentifier
    
    let cellLayoutUpdater: RoomCellLayoutUpdaterProtocol?
    
    let cellProvider: RoomTimelineCellProviderProtocol
    
    let cellDecorator: RoomTimelineCellDecorator
    
    // MARK: - Setup
    
    init(theme: Theme) {
        self.theme = theme
        self.identifier = .bubble
        self.cellLayoutUpdater = BubbleRoomCellLayoutUpdater(theme: theme)
        self.cellProvider = BubbleRoomTimelineCellProvider()
        self.cellDecorator = BubbleRoomTimelineCellDecorator()
    }
    
    // MARK: - Public
    
    func canAddEvent(_ event: MXEvent, and roomState: MXRoomState, to cellData: MXKRoomBubbleCellData) -> Bool {
        return false
    }
    
    func applySelectedStyleIfNeeded(toCell cell: MXKRoomBubbleTableViewCell, cellData: RoomBubbleCellData) {
        
        // Check whether the selected event belongs to this bubble
        let selectedComponentIndex = cellData.selectedComponentIndex
        if selectedComponentIndex != NSNotFound {
            
            cell.selectComponent(UInt(selectedComponentIndex),
                                 showEditButton: false,
                                 showTimestamp: false)
            
            self.cellDecorator.addTimestampLabel(toCell: cell, cellData: cellData)
        } else {
            cell.blurred = true
        }
    }
    
    // MARK: Themable
    
    func update(theme: Theme) {
        self.theme = theme        
        self.cellLayoutUpdater?.update(theme: theme)
    }
    
}