Provide mechanism to validate API keys. Re-organise structure to reflect new responsibility

src/Robware.Data/API/ApiKeyRepository.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Threading.Tasks;
+using System.Linq;
+using Dapper;
+using Robware.Auth.API;
+using Robware.Data.Users;
+
+namespace Robware.Data.API {
+	public class ApiKeyRepository : IApiKeys {
+		private readonly IDatabaseProvider _dbProvider;
+
+		public ApiKeyRepository(IDatabaseProvider dbProvider) {
+			_dbProvider = dbProvider;
+		}
+
+		public async Task<ApiKey> Get(string key) {
+			const string query = "SELECT * FROM api_keys WHERE api_key=@key";
+
+			using (var connection = _dbProvider.NewConnection()) {
+				connection.Open();
+				var result = await connection.QueryAsync<ApiKeyState>(query, new {key});
+
+				if (!result.Any())
+					throw new ApiKeyNotFoundException(key);
+
+				var dbKey = result.Single();
+				return new ApiKey {
+					Key = dbKey.Api_Key,
+					Enabled = dbKey.Enabled,
+					IssueTimestamp = dbKey.IssueTimestamp,
+					Name = dbKey.Name
+				};
+			}
+		}
+	}
+
+	public class ApiKeyState {
+		public string Name { get; set; }
+		public DateTime IssueTimestamp { get; set; }
+		public string Api_Key { get; set; }
+		public bool Enabled { get; set; }
+	}
+}