BootstrapBlazor.Extensions/src/extensions/BootstrapBlazor.Socket/Extensions/DataPropertyExtensions.cs at cf874f06d7b63078ec007702702a8df1c96e434c · BootstrapBlazor/BootstrapBlazor.Extensions · GitHub

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// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

namespace BootstrapBlazor.DataConverters;

static class DataPropertyExtensions
{
    public static IDataPropertyConverter? GetConverter(this DataPropertyConverterAttribute attribute)
    {
        return attribute.GetConverterByType() ?? attribute.GetDefaultConverter();
    }

    private static IDataPropertyConverter? GetConverterByType(this DataPropertyConverterAttribute attribute)
    {
        IDataPropertyConverter? converter = null;
        var converterType = attribute.ConverterType;
        if (converterType != null)
        {
            var converterParameters = attribute.ConverterParameters;
            var c = Activator.CreateInstance(converterType, converterParameters);
            if (c is IDataPropertyConverter v)
            {
                converter = v;
            }
        }
        return converter;
    }

    private static IDataPropertyConverter? GetDefaultConverter(this DataPropertyConverterAttribute attribute)
    {
        IDataPropertyConverter? converter = null;
        var type = attribute.Type;
        if (type != null)
        {
            if (type == typeof(byte[]))
            {
                converter = new DataByteArrayConverter();
            }
            else if (type == typeof(string))
            {
                converter = new DataStringConverter(attribute.EncodingName);
            }
            else if (type.IsEnum)
            {
                converter = new DataEnumConverter(attribute.Type);
            }
            else if (type == typeof(bool))
            {
                converter = new DataBoolConverter();
            }
            else if (type == typeof(short))
            {
                converter = new DataInt16BigEndianConverter();
            }
            else if (type == typeof(int))
            {
                converter = new DataInt32BigEndianConverter();
            }
            else if (type == typeof(long))
            {
                converter = new DataInt64BigEndianConverter();
            }
            else if (type == typeof(float))
            {
                converter = new DataSingleBigEndianConverter();
            }
            else if (type == typeof(double))
            {
                converter = new DataDoubleBigEndianConverter();
            }
            else if (type == typeof(ushort))
            {
                converter = new DataUInt16BigEndianConverter();
            }
            else if (type == typeof(uint))
            {
                converter = new DataUInt32BigEndianConverter();
            }
            else if (type == typeof(ulong))
            {
                converter = new DataUInt64BigEndianConverter();
            }
        }
        return converter;
    }

    public static object? ConvertTo(this DataPropertyConverterAttribute attribute, ReadOnlyMemory<byte> data)
    {
        object? ret = null;
        var start = attribute.Offset;
        var length = attribute.Length;

        if (data.Length >= start + length)
        {
            var buffer = data.Slice(start, length);
            var converter = attribute.GetConverter();
            if (converter != null)
            {
                ret = converter.Convert(buffer);
            }
        }
        return ret;
    }
}