/// <summary>
/// 模板数据生成
/// </summary>
/// <param name="types"></param>
/// <returns></returns>
internal static TemplateMetadata BuildTemplate(Type[] types)
{
var template = new TemplateMetadata();
template.UsingList.Add(typeof(object).Namespace);
template.UsingList.Add(typeof(Thread).Namespace);
template.UsingList.Add(typeof(Task).Namespace);
template.UsingList.Add(typeof(IHttpService).Namespace);
template.UsingList.Add(typeof(HttpServiceAttribute).Namespace);
template.UsingList.Add(typeof(HttpClientWrapperExtension).Namespace);
foreach (var type in types)
{
var classTemplate = new ClassTemplate()
{
InterfaceType = type,
Namespace = $"Dynamic.{RandomName()}",
Name = $"AutoGenerated{type.Name.TrimStart('I').Replace("`", string.Empty)}"
};
classTemplate.UsingList.Add(type.Namespace);
//类标签
foreach (var attr in CustomAttributeData.GetCustomAttributes(type))
{
classTemplate.AttributeList.Add(new CustomAttributeTemplate(attr).ToString());
}
//泛型类信息收集
if (type.IsGenericType)
{
foreach (var argumentType in type.GetGenericArguments())
{
var argument = new GenericArgumentTemplate()
{
Name = argumentType.Name
};
classTemplate.GenericArguments.Add(argument);
if (argumentType.GenericParameterAttributes == GenericParameterAttributes.None &&
argumentType.GetGenericParameterConstraints().Length == 0)
{
continue;
}
//class约束
if (argumentType.GenericParameterAttributes.HasFlag(GenericParameterAttributes.ReferenceTypeConstraint))
{
argument.Constraints.Add("class");
}
//值类型约束
if (argumentType.GenericParameterAttributes.HasFlag(GenericParameterAttributes.NotNullableValueTypeConstraint))
{
argument.Constraints.Add("struct");
}
//类型约束
foreach (var constraintType in argumentType.GetGenericParameterConstraints())
{
argument.Constraints.Add(new TypeTemplate(constraintType).ToString());
}
//无参构造函数
if (argumentType.GenericParameterAttributes.HasFlag(GenericParameterAttributes.DefaultConstructorConstraint))
{
argument.Constraints.Add("new()");
}
}
}
//方法信息
foreach (var method in type.GetRuntimeMethods())
{
if (method.IsSpecialName)
{
continue;
}
classTemplate.MethodList.Add(new MethodTemplate(method));
}
//属性
foreach (var property in type.GetRuntimeProperties())
{
if (property.IsSpecialName)
{
continue;
}
classTemplate.PropertyList.Add(new PropertyTemplate(property));
}
//todo:不支持事件
template.ClassList.Add(classTemplate);
}
return(template);
}
/// <summary>
/// 组装代码
/// </summary>
/// <param name="template"></param>
/// <returns></returns>
internal static string GenerateCode(TemplateMetadata template)
{
StringBuilder builder = new StringBuilder(2048);
foreach (var @using in template.UsingList)
{
builder.AppendFormat("using {0};", @using).AppendLine();
}
builder.AppendLine();
foreach (var @class in template.ClassList)
{
int indentLevel = 0; //缩进级别
builder.Append($"namespace ").Append(@class.Namespace).AppendLine();
builder.Append("{").AppendLine();
indentLevel++;
foreach (var classUsing in @class.UsingList)
{
builder.AppendIndent(indentLevel).AppendFormat("using {0};", classUsing).AppendLine();
}
builder.AppendLine();
//创建类
builder.AppendIndent(indentLevel).Append("/*").AppendLine();
builder.AppendIndent(indentLevel).Append(" *").AppendFormat(" {0} implement {1}", @class.Name, new TypeTemplate(@class.InterfaceType).Name).AppendLine();
builder.AppendIndent(indentLevel).Append(" */").AppendLine();
foreach (var classAttr in @class.AttributeList)
{
builder.AppendIndent(indentLevel).Append(classAttr).AppendLine();
}
builder.AppendIndent(indentLevel).Append("public class ").Append(@class.Name);
var genericArg = string.Join(",", @class.GenericArguments.Select(x => x.Name));
if (!string.IsNullOrEmpty(genericArg))
{
builder.AppendFormat("<{0}>", genericArg);
}
//接口实现
builder.Append(" : ");
builder.Append(new TypeTemplate(@class.InterfaceType).Name);
if (!string.IsNullOrEmpty(genericArg))
{
builder.AppendFormat("<{0}>", genericArg);
}
//泛型约束
foreach (var argument in @class.GenericArguments)
{
builder.AppendFormat(" where {0} : {1}", argument.Name, string.Join(",", argument.Constraints));
}
builder.AppendLine();
builder.AppendIndent(indentLevel).Append('{').AppendLine();
indentLevel++;
//私有字段
builder.AppendIndent(indentLevel).Append("private readonly IRequestDescriptorBuilder _builder;").AppendLine();
builder.AppendIndent(indentLevel).Append("private readonly IHttpClientWrapper _client;").AppendLine();
builder.AppendLine();
//---构造函数-----
builder.AppendIndent(indentLevel).Append("public ").Append(@class.Name).Append("(IRequestDescriptorBuilder builder, IHttpClientWrapper client)")
.AppendLine();
builder.AppendIndent(indentLevel).Append('{').AppendLine();
indentLevel++;
builder.AppendIndent(indentLevel).Append("_builder = builder;").AppendLine();
builder.AppendIndent(indentLevel).Append("_client = client;").AppendLine();
indentLevel--;
builder.AppendIndent(indentLevel).Append('}').AppendLine();
//--构造函数结束-----
builder.AppendLine();
//---属性开始---
foreach (var property in @class.PropertyList)
{
builder.AppendLine();
builder.AppendIndent(indentLevel).Append(property.ToString()).AppendLine();
}
//---属性结束---
//----方法开始----
foreach (var method in @class.MethodList)
{
builder.AppendLine();
builder.AppendIndent(indentLevel).Append("// ").Append(method.Name).AppendLine();
//方法标签
foreach (var methodAttr in method.AttributeList)
{
builder.AppendIndent(indentLevel).Append(methodAttr).AppendLine();
}
//方法签名
builder.AppendIndent(indentLevel).Append("public ");
if (method.IsAsync)
{
builder.Append("async ");
}
builder.Append(method.ReturnType.ToString()).Append(" ");
builder.Append(method.Name);
if (method.GenericArguments.Count > 0)
{
builder.AppendFormat("<{0}>", string.Join(",", method.GenericArguments.Select(x => x.Name)));
}
builder.Append("(");
builder.Append(string.Join(",", method.Parameters));
builder.Append(")");
//方法泛型约束
foreach (var argument in method.GenericArguments)
{
builder.AppendFormat(" where {0} : {1}", argument.Name, string.Join(",", argument.Constraints));
}
builder.AppendLine();
//---方法签名结束
builder.AppendIndent(indentLevel).Append("{").AppendLine();
indentLevel++;
//---方法体开始-----
//var request = _builder.Build(typeof(ITokenService), token, template);
builder.AppendIndent(indentLevel).AppendFormat("var request = _builder.Build(this.GetType(),{0});", string.Join(",", method.Parameters.Select(x => x.Name)));
builder.AppendLine();
//获取token变量
var tokenParam = method.Method.GetParameters().LastOrDefault(x => x.ParameterType == typeof(CancellationToken));
var tokenName = tokenParam != null
? method.Parameters.ToArray()[tokenParam.Position].Name
: "CancellationToken.None";
builder.AppendIndent(indentLevel).Append(ClientInvokeCode(method.ReturnType.Type, tokenName)).AppendLine();
//---方法体结束-----
indentLevel--;
builder.AppendIndent(indentLevel).Append("}").AppendLine();
}
//--方法结束--
indentLevel--;
builder.AppendIndent(indentLevel).Append('}').AppendLine();
//--类结束--
indentLevel--;
builder.AppendIndent(indentLevel).Append("}").AppendLine().AppendLine();
//--命名空间结束--
}
return(builder.ToString());
}