//
// Copyright 2023 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 Foundation

struct CollapsibleTimelineItem: RoomTimelineItemProtocol, Equatable {
    let id: TimelineItemIdentifier
    let items: [RoomTimelineItemProtocol]
    let itemIDs: [TimelineItemIdentifier]
    
    init(items: [RoomTimelineItemProtocol]) {
        self.items = items
        itemIDs = items.map(\.id)
        
        guard let firstItemID = itemIDs.first else {
            fatalError()
        }
        
        id = firstItemID
    }
    
    // MARK: - Equatable
    
    static func == (lhs: CollapsibleTimelineItem, rhs: CollapsibleTimelineItem) -> Bool {
        // Technically not a correct implementation of equality as the items themselves could be updated.
        lhs.id == rhs.id && lhs.itemIDs == rhs.itemIDs
    }
}
