Initial version.

TINKLib/Model/Connector/Query/CachedQuery.cs

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+using Serilog;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using TINK.Model.Bike;
+using TINK.Model.Services.CopriApi;
+using TINK.Model.Repository;
+using BikeInfo = TINK.Model.Bike.BC.BikeInfo;
+
+namespace TINK.Model.Connector
+{
+    public class CachedQuery : Base, IQuery
+    {
+        /// <summary> Cached copri server. </summary>
+        private readonly ICachedCopriServer server;
+
+        /// <summary>Constructs a copri query object.</summary>
+        /// <param name="p_oCopriServer">Server which implements communication.</param>
+        public CachedQuery(
+            ICopriServerBase p_oCopriServer) : base(p_oCopriServer)
+        {
+            server = p_oCopriServer as ICachedCopriServer;
+            if (server == null)
+            {
+                throw new ArgumentException($"Copri server is not of expected typ. Type detected is {p_oCopriServer.GetType()}.");
+            }
+        }
+
+        /// <summary> Gets all stations including postions and bikes.</summary>
+        public async Task<Result<StationsAndBikesContainer>> GetBikesAndStationsAsync()
+        {
+            var resultStations = await server.GetStations();
+
+            if (resultStations.Source == typeof(CopriCallsMonkeyStore))
+            {
+                // Communication with copri in order to get stations failed.
+                return new Result<StationsAndBikesContainer>(
+                    resultStations.Source,
+                    new StationsAndBikesContainer(
+                        resultStations.Response.GetStationsAllMutable(),
+                        (await server.GetBikesAvailable(true)).Response.GetBikesAvailable()),
+                    resultStations.Exception);
+            }
+
+            var resultBikes = await server.GetBikesAvailable();
+            if (resultBikes.Source == typeof(CopriCallsMonkeyStore))
+            {
+                // Communication with copri in order to get bikes failed.
+                return new Result<StationsAndBikesContainer>(
+                    resultBikes.Source,
+                    new StationsAndBikesContainer(
+                        (await server.GetStations(true)).Response.GetStationsAllMutable(),
+                        resultBikes.Response.GetBikesAvailable()),
+                    resultBikes.Exception);
+            }
+
+            // Communicatin with copri succeeded.
+            server.AddToCache(resultStations);
+            server.AddToCache(resultBikes);
+
+            return new Result<StationsAndBikesContainer>(
+                resultStations.Source,
+                new StationsAndBikesContainer(resultStations.Response.GetStationsAllMutable(), resultBikes.Response.GetBikesAvailable()));
+        }
+
+        /// <summary> Gets bikes occupied. </summary>
+        /// <returns>Collection of bikes.</returns>
+        public async Task<Result<BikeCollection>> GetBikesOccupiedAsync()
+        {
+            Log.ForContext<CachedQuery>().Error("Unexpected call to get be bikes occpied detected. No user is logged in.");
+            return new Result<BikeCollection>(
+                typeof(CopriCallsMonkeyStore),
+                await Task.Run(() => new BikeCollection(new Dictionary<int, BikeInfo>())),
+                new System.Exception("Abfrage der reservierten/ gebuchten Räder nicht möglich. Kein Benutzer angemeldet."));
+        }
+
+        /// <summary> Gets bikes available. </summary>
+        /// <returns>Collection of bikes.</returns>
+        public async Task<Result<BikeCollection>> GetBikesAsync()
+        {
+            var result = await server.GetBikesAvailable();
+            server.AddToCache(result);
+            return new Result<BikeCollection>(result.Source, result.Response.GetBikesAvailable(), result.Exception);
+        }
+    }
+}