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OCPP.Core.Server/ControllerBase.cs
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205
OCPP.Core.Server/ControllerBase.cs
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/*
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* OCPP.Core - https://github.com/dallmann-consulting/OCPP.Core
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* Copyright (C) 2020-2021 dallmann consulting GmbH.
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* All Rights Reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Reflection;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Http;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Schema;
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using OCPP.Core.Database;
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using OCPP.Core.Server.Messages_OCPP16;
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namespace OCPP.Core.Server
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{
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public partial class ControllerBase
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{
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/// <summary>
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/// Internal string for OCPP protocol version
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/// </summary>
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protected virtual string ProtocolVersion { get; }
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/// <summary>
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/// Configuration context for reading app settings
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/// </summary>
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protected IConfiguration Configuration { get; set; }
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/// <summary>
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/// Chargepoint status
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/// </summary>
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protected ChargePointStatus ChargePointStatus { get; set; }
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/// <summary>
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/// ILogger object
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/// </summary>
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protected ILogger Logger { get; set; }
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/// <summary>
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/// DbContext object
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/// </summary>
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protected OCPPCoreContext DbContext { get; set; }
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/// <summary>
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/// Constructor
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/// </summary>
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public ControllerBase(IConfiguration config, ILoggerFactory loggerFactory, ChargePointStatus chargePointStatus, OCPPCoreContext dbContext)
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{
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Configuration = config;
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if (chargePointStatus != null)
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{
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ChargePointStatus = chargePointStatus;
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}
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else
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{
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Logger.LogError("New ControllerBase => empty chargepoint status");
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}
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DbContext = dbContext;
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}
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/// <summary>
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/// Deserialize and validate JSON message (if schema file exists)
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/// </summary>
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protected T DeserializeMessage<T>(OCPPMessage msg)
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{
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string path = Assembly.GetExecutingAssembly().Location;
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string codeBase = Path.GetDirectoryName(path);
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bool validateMessages = Configuration.GetValue<bool>("ValidateMessages", false);
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string schemaJson = null;
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if (validateMessages &&
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!string.IsNullOrEmpty(codeBase) &&
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Directory.Exists(codeBase))
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{
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string msgTypeName = typeof(T).Name;
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string filename = Path.Combine(codeBase, $"Schema{ProtocolVersion}", $"{msgTypeName}.json");
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if (File.Exists(filename))
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{
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Logger.LogTrace("DeserializeMessage => Using schema file: {0}", filename);
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schemaJson = File.ReadAllText(filename);
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}
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}
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JsonTextReader reader = new JsonTextReader(new StringReader(msg.JsonPayload));
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JsonSerializer serializer = new JsonSerializer();
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if (!string.IsNullOrEmpty(schemaJson))
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{
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JSchemaValidatingReader validatingReader = new JSchemaValidatingReader(reader);
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validatingReader.Schema = JSchema.Parse(schemaJson);
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IList<string> messages = new List<string>();
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validatingReader.ValidationEventHandler += (o, a) => messages.Add(a.Message);
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T obj = serializer.Deserialize<T>(validatingReader);
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if (messages.Count > 0)
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{
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foreach (string err in messages)
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{
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Logger.LogWarning("DeserializeMessage {0} => Validation error: {1}", msg.Action, err);
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}
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throw new FormatException("Message validation failed");
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}
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return obj;
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}
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else
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{
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// Deserialization WITHOUT schema validation
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Logger.LogTrace("DeserializeMessage => Deserialization without schema validation");
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return serializer.Deserialize<T>(reader);
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}
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}
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/// <summary>
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/// Helper function for creating and updating the ConnectorStatus in then database
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/// </summary>
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protected bool UpdateConnectorStatus(int connectorId, string status, DateTimeOffset? statusTime, double? meter, DateTimeOffset? meterTime)
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{
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try
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{
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ConnectorStatus connectorStatus = DbContext.Find<ConnectorStatus>(ChargePointStatus.Id, connectorId);
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if (connectorStatus == null)
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{
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// no matching entry => create connector status
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connectorStatus = new ConnectorStatus();
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connectorStatus.ChargePointId = ChargePointStatus.Id;
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connectorStatus.ConnectorId = connectorId;
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Logger.LogTrace("UpdateConnectorStatus => Creating new DB-ConnectorStatus: ID={0} / Connector={1}", connectorStatus.ChargePointId, connectorStatus.ConnectorId);
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DbContext.Add<ConnectorStatus>(connectorStatus);
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}
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if (!string.IsNullOrEmpty(status))
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{
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connectorStatus.LastStatus = status;
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connectorStatus.LastStatusTime = ((statusTime.HasValue) ? statusTime.Value : DateTimeOffset.UtcNow).DateTime;
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}
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if (meter.HasValue)
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{
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connectorStatus.LastMeter = meter.Value;
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connectorStatus.LastMeterTime = ((meterTime.HasValue) ? meterTime.Value : DateTimeOffset.UtcNow).DateTime;
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}
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DbContext.SaveChanges();
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Logger.LogInformation("UpdateConnectorStatus => Save ConnectorStatus: ID={0} / Connector={1} / Status={2} / Meter={3}", connectorStatus.ChargePointId, connectorId, status, meter);
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return true;
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}
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catch (Exception exp)
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{
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Logger.LogError(exp, "UpdateConnectorStatus => Exception writing connector status (ID={0} / Connector={1}): {2}", ChargePointStatus?.Id, connectorId, exp.Message);
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}
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return false;
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}
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/// <summary>
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/// Clean charge tag Id from possible suffix ("..._abc")
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/// </summary>
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protected static string CleanChargeTagId(string rawChargeTagId, ILogger logger)
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{
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string idTag = rawChargeTagId;
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// KEBA adds the serial to the idTag ("<idTag>_<serial>") => cut off suffix
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if (!string.IsNullOrWhiteSpace(rawChargeTagId))
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{
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int sep = rawChargeTagId.IndexOf('_');
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if (sep >= 0)
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{
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idTag = rawChargeTagId.Substring(0, sep);
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logger.LogTrace("CleanChargeTagId => Charge tag '{0}' => '{1}'", rawChargeTagId, idTag);
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}
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}
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return idTag;
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}
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protected static DateTimeOffset MaxExpiryDate
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{
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get
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{
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return new DateTime(2199, 12, 31);
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}
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}
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}
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}
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