added data access methods for user access.

External/Implementations/UserAccessDataAcces.cs

@@ -0,0 +1,91 @@
+using CarCareTracker.External.Interfaces;
+using CarCareTracker.Helper;
+using CarCareTracker.Models;
+using LiteDB;
+
+namespace CarCareTracker.External.Implementations
+{
+    public class UserAccessDataAccess : IUserAccessDataAccess
+    {
+        private static string dbName = StaticHelper.DbName;
+        private static string tableName = "useraccessrecords";
+        public UserAccess GetUserAccessByVehicleAndUserId(int vehicleId, int userId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                return table.FindOne(Query.And(
+                    Query.EQ(nameof(UserAccess.VehicleId), vehicleId),
+                    Query.EQ(nameof(UserAccess.UserId), userId)
+                    ));
+            };
+        }
+        /// <summary>
+        /// Gets a list of vehicles user have access to.
+        /// </summary>
+        /// <param name="userId"></param>
+        /// <returns></returns>
+        public List<UserAccess> GetUserAccessByUserId(int userId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                return table.Find(Query.EQ(nameof(UserAccess.UserId), userId)).ToList();
+            };
+        }
+        public List<UserAccess> GetUserAccessByVehicleId(int vehicleId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                return table.Find(Query.EQ(nameof(UserAccess.VehicleId), vehicleId)).ToList();
+            };
+        }
+        public bool SaveUserAccess(UserAccess userAccess)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                table.Upsert(userAccess);
+                return true;
+            };
+        }
+        public bool DeleteUserAccess(int userAccessId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                table.Delete(userAccessId);
+                return true;
+            };
+        }
+        /// <summary>
+        /// Delete all access records when a vehicle is deleted.
+        /// </summary>
+        /// <param name="vehicleId"></param>
+        /// <returns></returns>
+        public bool DeleteAllAccessRecordsByVehicleId(int vehicleId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                table.DeleteMany(Query.EQ(nameof(UserAccess.VehicleId), vehicleId));
+                return true;
+            };
+        }
+        /// <summary>
+        /// Delee all access records when a user is deleted.
+        /// </summary>
+        /// <param name="userId"></param>
+        /// <returns></returns>
+        public bool DeleteAllAccessRecordsByUserId(int userId)
+        {
+            using (var db = new LiteDatabase(dbName))
+            {
+                var table = db.GetCollection<UserAccess>(tableName);
+                table.DeleteMany(Query.EQ(nameof(UserAccess.UserId), userId));
+                return true;
+            };
+        }
+    }
+}