element-ios/RiotSwiftUI/Modules/Room/LiveLocationSharingViewer/Service/MatrixSDK/LiveLocationSharingViewerService.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 Foundation
import CoreLocation
import MatrixSDK

@available(iOS 14.0, *)
class LiveLocationSharingViewerService: LiveLocationSharingViewerServiceProtocol {
    
    // MARK: - Properties
    
    private(set) var usersLiveLocation: [UserLiveLocation] = []
    
    // MARK: Private
    
    private let session: MXSession
    
    // MARK: Public
    
    func isCurrentUserId(_ userId: String) -> Bool {
        return self.session.myUserId == userId
    }
    
    // MARK: - Setup
    
    init(session: MXSession, roomId: String) {
        self.session = session
        
        let beaconInfoSummaries = self.session.locationService.getLiveBeaconInfoSummaries(inRoomWithId: roomId)
        
        self.usersLiveLocation = Self.usersLiveLocation(fromBeaconInfoSummaries: beaconInfoSummaries, session: session)
    }
    
    // MARK: - Private
    
    class private func usersLiveLocation(fromBeaconInfoSummaries beaconInfoSummaries: [MXBeaconInfoSummaryProtocol], session: MXSession) -> [UserLiveLocation] {
        
        return beaconInfoSummaries.compactMap { beaconInfoSummary in
            
            let beaconInfo = beaconInfoSummary.beaconInfo
            
            guard let lastBeacon = beaconInfoSummary.lastBeacon else {
                return nil
            }
            
            let avatarData = session.avatarInput(for: beaconInfoSummary.userId)
            
            let timestamp = TimeInterval(beaconInfo.timestamp/1000)
            let timeout = TimeInterval(beaconInfo.timeout/1000)
            let lastUpdate = TimeInterval(lastBeacon.timestamp/1000)
            
            let coordinate = CLLocationCoordinate2D(latitude: lastBeacon.location.latitude, longitude: lastBeacon.location.longitude)
            
            return UserLiveLocation(avatarData: avatarData,
                                    timestamp: timestamp,
                                    timeout: timeout,
                                    lastUpdate: lastUpdate,
                                    coordinate: coordinate)
        }
    }
}