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using Google.Protobuf;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.ExtensionMethods;
using Tango.PMR;
using Tango.PMR.Common;
namespace Tango.DataStore
{
/// <summary>
/// Contains data store helper methods.
/// </summary>
public static class DataStoreHelper
{
/// <summary>
/// Gets the data store data type by the specified object type.
/// </summary>
/// <param name="value">The value.</param>
/// <returns></returns>
public static DataType GetDataType(Object value)
{
return GetDataType(value.GetType());
}
/// <summary>
/// Gets data store data type by the specified .net type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns></returns>
/// <exception cref="System.NotSupportedException"></exception>
public static DataType GetDataType(Type type)
{
if (type == typeof(int))
{
return DataType.Int32;
}
else if (type == typeof(Int64))
{
return DataType.Int32;
}
else if (type == typeof(float))
{
return DataType.Float;
}
else if (type == typeof(double))
{
return DataType.Double;
}
else if (type == typeof(String))
{
return DataType.String;
}
else if (type == typeof(bool))
{
return DataType.Boolean;
}
else if (type == typeof(byte[]))
{
return DataType.Bytes;
}
else if (type == typeof(DataStoreProtoObject))
{
return DataType.Proto;
}
else if (typeof(IMessage).IsAssignableFrom(type))
{
return DataType.Proto;
}
throw new NotSupportedException($"The specified type '{type.Name}' is not supported by the data store.");
}
/// <summary>
/// Formats the data store item as a string.
/// </summary>
/// <param name="item">The item.</param>
/// <returns></returns>
public static String FormatDataStoreItem(IDataStoreItem item)
{
if (item.Type == DataType.Bytes)
{
return GetByteArrayHexString((byte[])item.Value);
}
else if (item.Type == DataType.Proto)
{
return (item.Value as DataStoreProtoObject).Message.ToJsonString();
}
else
{
return item.Value.ToStringSafe();
}
}
/// <summary>
/// Returns a byte array string representation in hex format.
/// </summary>
/// <param name="data">The data.</param>
/// <returns></returns>
public static String GetByteArrayHexString(byte[] data)
{
StringBuilder hex = new StringBuilder();
foreach (byte b in data)
{
hex.Append(b.ToString("X2") + " ");
}
return hex.ToString();
}
/// <summary>
/// Parses a data store value from a string.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="text">The string.</param>
/// <param name="protoMessageType">Type of the proto message (if type is Proto).</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">No PMR message type specified.</exception>
/// <exception cref="NotSupportedException">The specified data store type is not supported.</exception>
public static Object ParseDataStoreValue(DataType type, String text, MessageType? protoMessageType = null)
{
switch (type)
{
case DataType.String:
return text;
case DataType.Int32:
return int.Parse(text);
case DataType.Float:
return float.Parse(text);
case DataType.Double:
return double.Parse(text);
case DataType.Boolean:
return bool.Parse(text);
case DataType.Proto:
if (protoMessageType == null) throw new ArgumentNullException("No PMR message type specified.");
var messageType = MessageFactory.GetPMRTypeFromMessageType(protoMessageType.Value);
var instance = Activator.CreateInstance(messageType) as IMessage;
instance = instance.GetParser().ParseJson(text);
return DataStoreProtoObject.FromMessage(instance);
case DataType.Bytes:
string[] hexValuesSplit = text.Split(' ');
List<byte> bytes = new List<byte>();
foreach (string hex in hexValuesSplit)
{
if (hex.IsNotNullOrEmpty())
{
byte b = (byte)Convert.ToInt32(hex.Trim(), 16);
bytes.Add(b);
}
}
return bytes.ToArray();
}
throw new NotSupportedException("The specified data store type is not supported.");
}
}
}
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