sharee.bike-App/TINKLib/ViewModel/Bikes/Bike/BluetoothLock/RequestHandlerFactory.cs

using System;
using TINK.Model.Bike.BluetoothLock;
using TINK.Model.Connector;
using TINK.Services.BluetoothLock;
using TINK.Model.Services.Geolocation;
using TINK.View;
using TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler;
using TINK.Model.User;
using TINK.MultilingualResources;
using Serilog;

namespace TINK.ViewModel.Bikes.Bike.BluetoothLock
{
    public static class RequestHandlerFactory
    {
        /// <summary> Creates a request handler.</summary>
        /// <param name="selectedBike"></param>
        /// <param name="isConnectedDelegate"></param>
        /// <param name="connectorFactory"></param>
        /// <param name="bikeRemoveDelegate"></param>
        /// <param name="viewUpdateManager"></param>
        /// <param name="viewService"></param>
        /// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
        /// <returns>Request handler.</returns>
        public static IRequestHandler Create(
            Model.Bikes.Bike.BC.IBikeInfoMutable selectedBike,
            Func<bool> isConnectedDelegate,
            Func<bool, IConnector> connectorFactory,
            IGeolocation geolocation,
            ILocksService lockService,
            Func<IPollingUpdateTaskManager> viewUpdateManager,
            IViewService viewService,
            IBikesViewModel bikesViewModel,
            IUser activeUser)
        {
            if (!(selectedBike is Model.Bikes.Bike.BluetoothLock.IBikeInfoMutable selectedBluetoothLockBike))
                return null;

            switch (selectedBluetoothLockBike.State.Value)
            {
                case Model.State.InUseStateEnum.Disposable:

                    // Bike is reserved, selecte action depending on lock state.
                    switch (selectedBluetoothLockBike.LockInfo.State)
                    {
                        case LockingState.Closed:
                            // Unexepected state detected.
                            // This state is unexpected because connection is closed
                            // - when reservation is canceled or 
                            // - when bike is returned.
                            Log.Error("Unexpected state {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
                            return new InvalidState(
                                bikesViewModel,
                                selectedBluetoothLockBike.State.Value,
                                selectedBluetoothLockBike.LockInfo.State,
                                string.Format(AppResources.MarkingBikeInfoErrorStateDisposableClosedDetected, selectedBluetoothLockBike.Description));

                        case LockingState.Open:
                        case LockingState.Unknown:
                            // Unexepected state detected.
                            /// This state is unexpected because
                            /// - app does not allow to return bike/ cancel reservation when lock is closed
                            /// - as long as app is connected to lock
                            ///     - lock can not be opened manually
                            ///     - no other device can access lock 
                            /// Nevetheless this state is not expected let user either
                            /// - close lock or
                            /// - rent bike
                            /// </remarks>
                            Log.Error("Unexpected state {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
                            return new DisposableOpen(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        default:
                            // Do not allow interaction with lock before reserving bike.
                            return new DisposableDisconnected(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);
                    }

                case Model.State.InUseStateEnum.Reserved:

                    // Bike is reserved, selecte action depending on lock state.
                    switch (selectedBluetoothLockBike.LockInfo.State)
                    {
                        case LockingState.Closed:
                            // Lock could not be opened after reserving bike.
                            return new ReservedClosed(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        case LockingState.Disconnected:
                            return new ReservedDisconnected(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        case LockingState.Open:
                            // Unwanted state detected.
                            /// This state might occure when a ILOCKIT was manually opened (color code) and app connects afterwards.
                            Log.Error("Unwanted state {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
                            return new ReservedOpen(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        case LockingState.Unknown:
                            // User wants to return bike/ pause ride.
                            return new ReservedUnknown(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        default:
                            // Invalid state detected. Lock must never be open if bike is reserved.
                            throw new ArgumentException();
                    }

                case Model.State.InUseStateEnum.Booked:

                    // Bike is booked, selecte action depending on lock state.
                    switch (selectedBluetoothLockBike.LockInfo.State)
                    {
                        case LockingState.Closed:
                            // Ride was paused.
                            return new BookedClosed(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        case LockingState.Open:
                            // User wants to return bike/ pause ride.
                            return new BookedOpen(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        case LockingState.Unknown:
                            // User wants to return bike/ pause ride.
                            return new BookedUnknown(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);

                        default:
                            // Invalid state detected. 
                            // If bike is booked lock state must be querried before creating view model.
                            return new BookedDisconnected(
                                selectedBluetoothLockBike,
                                isConnectedDelegate,
                                connectorFactory,
                                geolocation,
                                lockService,
                                viewUpdateManager,
                                viewService,
                                bikesViewModel,
                                activeUser);
                    }

                default:
                    // Unexpected copri state detected.
                    Log.Error("Unexpected locking {BookingState}/ {LockingState} detected.", selectedBluetoothLockBike.State.Value, selectedBluetoothLockBike.LockInfo.State);
                    return new InvalidState(
                        bikesViewModel,
                        selectedBluetoothLockBike.State.Value,
                        selectedBluetoothLockBike.LockInfo.State,
                        string.Format(AppResources.MarkingBikeInfoErrorStateUnknownDetected, selectedBluetoothLockBike.Description));
            }
        }
    }
}