private static string ExtractEnumerableType(Type type, TypeScriptContext context)
{
Type enumerableGenericArgument = null;
if (type.IsInterface && type.IsConstructedGenericType && type.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
enumerableGenericArgument = type.GetGenericArguments().Single();
}
else if (type.IsInterface && type == typeof(IEnumerable))
{
enumerableGenericArgument = typeof(object);
}
else
{
enumerableGenericArgument = type.GetInterfaces()
.FirstOrDefault(i => i.IsConstructedGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>))
?.GetGenericArguments().Single();
}
if (enumerableGenericArgument != null)
{
return($"Array<{GetTypeRef(enumerableGenericArgument, context)}>");
}
return(null);
}
private static IEnumerable <MemberDefinition> GetMembers(Type type, TypeScriptContext context)
{
var shouldGenerateMember = context.Options.ShouldGenerateMember;
if (shouldGenerateMember == null)
{
return(Enumerable.Empty <MemberDefinition>());
}
var memberRenamer = context.Options.MemberRenamer ?? new Func <MemberInfo, string>(x => x.Name);
var useDecorators = context.Options.UseDecorators ?? new Func <MemberInfo, IEnumerable <string> >(_ => (new List <string>()));
var memberDefs = type.GetFields(BindingFlags)
.Select(f => {
var fieldType = f.FieldType;
var nullable = false;
if (fieldType.IsGenericType && fieldType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
// choose the generic parameter, rather than the nullable
fieldType = fieldType.GetGenericArguments()[0];
nullable = true;
}
var memberDefinition = new MemberDefinition(memberRenamer(f), GetTypeRef(fieldType, context), nullable, useDecorators(f).ToList());
if (shouldGenerateMember(f, memberDefinition))
{
return(memberDefinition);
}
return(null);
})
.ToList();
memberDefs.AddRange(
type.GetProperties(BindingFlags)
.Select(p =>
{
var propertyType = p.PropertyType;
var nullable = false;
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
// choose the generic parameter, rather than the nullable
propertyType = propertyType.GetGenericArguments()[0];
nullable = true;
}
var memberDefinition = new MemberDefinition(memberRenamer(p), GetTypeRef(propertyType, context), nullable,
useDecorators(p).ToList());
if (shouldGenerateMember(p, memberDefinition))
{
return(memberDefinition);
}
return(null);
}).ToList()
);
return(memberDefs.Where(md => md != null).ToList());
}
private static List <string> GetInterfaces(Type type, TypeScriptContext context)
{
var interfaces = type.GetInterfaces().ToList();
return(interfaces
.Except(type.BaseType?.GetInterfaces() ?? Enumerable.Empty <Type>())
.Except(interfaces.SelectMany(i => i.GetInterfaces())) // get only implemented by this type
.Where(i => PopulateTypeDefinition(i, context) != null)
.Select(i => GetTypeRef(i, context))
.ToList());
}
internal static string GenerateTypeScript(IEnumerable <Type> types, TypeScriptOptions options)
{
var context = new TypeScriptContext(options);
GetTypeScriptDefinitions(types, context);
Handlebars.Configuration.TextEncoder = SimpleEncoder.Instance;
var generator = Handlebars.Compile(Template);
return(generator(context));
}
private static IEnumerable <MemberDefinition> GetMembers(Type type, TypeScriptContext context)
{
var memberDefs = type.GetFields(BindingFlags)
.Select(f => new MemberDefinition(f.Name, GetTypeRef(f.FieldType, context)))
.ToList();
memberDefs.AddRange(
type.GetProperties(BindingFlags)
.Select(p => new MemberDefinition(p.Name, GetTypeRef(p.PropertyType, context)))
);
return(memberDefs);
}
private static string GetTypeRef(Type type, TypeScriptContext context)
{
if (type.IsGenericParameter)
{
return(type.Name);
}
if (type.IsEnum)
{
var enumDef = PopulateEnumDefinition(type, context);
return(enumDef != null ? enumDef.Name : "any");
}
var typeCode = GetTypeCode(type);
if (typeCode != TypeCode.Object)
{
return(GetPrimitiveMemberType(typeCode, context.Options));
}
var dictionaryType = ExtractDictionaryType(type, context);
if (dictionaryType != null)
{
return(dictionaryType);
}
var enumerableType = ExtractEnumerableType(type, context);
if (enumerableType != null)
{
return(enumerableType);
}
var typeDef = PopulateTypeDefinition(type, context);
if (typeDef == null)
{
return("any");
}
var typeName = typeDef.Name;
if (type.IsGenericType)
{
var genericPrms = type.GetGenericArguments().Select(t => GetTypeRef(t, context));
return($"{typeName}<{string.Join(", ", genericPrms)}>");
}
return(typeName);
}
private static void GetTypeScriptDefinitions(IEnumerable <Type> types, TypeScriptContext context)
{
foreach (var type in types)
{
if (!type.IsEnum)
{
PopulateTypeDefinition(type, context);
}
else
{
PopulateEnumDefinition(type, context);
}
}
}
private static string ApplyRename(string typeName, TypeScriptContext context)
{
var options = context.Options;
typeName = options.TypeRenamer != null?options.TypeRenamer(typeName) : typeName;
var checkName = typeName;
var i = 1;
while (context.Types.Any(td => td.Name == checkName))
{
checkName = $"{typeName}${i++}";
}
return(checkName);
}
private static string ExtractDictionaryType(Type type, TypeScriptContext context)
{
var dictionaryInterface = type.GetInterfaces().Concat(new[] { type }).FirstOrDefault(t =>
t.IsConstructedGenericType && t.GetGenericTypeDefinition() == typeof(IDictionary <,>));
if (dictionaryInterface == null)
{
return(null);
}
var genericArguments = dictionaryInterface.GetGenericArguments();
var keyType = GetTypeRef(genericArguments[0], context);
var valueType = GetTypeRef(genericArguments[1], context);
return($"{{ [key: {keyType}]: {valueType} }}");
}
private static IEnumerable <MethodDefinition> GetMethods(Type type, TypeScriptContext context)
{
var shouldGenerateMethod = context.Options.ShouldGenerateMethod;
if (shouldGenerateMethod == null)
{
return(Enumerable.Empty <MethodDefinition>());
}
var useDecorators = context.Options.UseDecorators ?? (_ => new List <string>());
var memberRenamer = context.Options.MemberRenamer ?? (x => x.Name);
var retVal = new List <MethodDefinition>();
var methods = type.GetMethods(BindingFlags).Where(m => !m.IsSpecialName);
foreach (var method in methods)
{
string declaration;
if (method.IsGenericMethod)
{
var methodName = memberRenamer(method);
var genericPrms = method.GetGenericArguments().Select(t => GetTypeRef(t, context));
declaration = $"{methodName}<{string.Join(", ", genericPrms)}>";
}
else
{
declaration = memberRenamer(method);
}
var parameters = method.GetParameters()
.Select(p => new MemberDefinition(p.Name, GetTypeRef(p.ParameterType, context)));
var decorators = useDecorators(method);
var methodDefinition = new MethodDefinition(declaration, parameters, decorators);
if (shouldGenerateMethod(method, methodDefinition))
{
retVal.Add(methodDefinition);
}
}
return(retVal);
}
private static string GetTypeRef(Type type, TypeScriptContext context)
{
if (type.IsGenericParameter)
{
return(type.Name);
}
if (type.IsEnum)
{
var enumDef = PopulateEnumDefinition(type, context);
return(enumDef != null ? enumDef.Name : "any");
}
var typeCode = Type.GetTypeCode(type);
if (typeCode != TypeCode.Object)
{
return(GetPrimitiveMemberType(typeCode, context.Options));
}
var enumerable = type.GetInterfaces()
.FirstOrDefault(i => i.IsConstructedGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>));
if (enumerable != null)
{
return($"Array<{GetTypeRef(enumerable.GetGenericArguments().First(), context)}>");
}
var typeDef = PopulateTypeDefinition(type, context);
if (typeDef == null)
{
return("any");
}
var typeName = typeDef.Name;
if (type.IsGenericType)
{
var genericPrms = type.GetGenericArguments().Select(t => GetTypeRef(t, context));
return($"{typeName}<{string.Join(", ", genericPrms)}>");
}
return(typeName);
}
private static EnumDefinition PopulateEnumDefinition(Type type, TypeScriptContext context)
{
var existing = context.Enums.FirstOrDefault(t => t.ClrType == type);
if (existing != null)
{
return(existing);
}
var members = Enum.GetNames(type)
.Select(n => new EnumField(n, Convert.ToInt32(Enum.Parse(type, n)).ToString()));
var def = new EnumDefinition(type, ApplyRename(type.Name, context), members);
context.Enums.Add(def);
return(def);
}
private static TypeDefinition PopulateTypeDefinition(Type type, TypeScriptContext context)
{
if (type.IsGenericParameter)
{
return(null);
}
var typeCode = Type.GetTypeCode(type);
if (typeCode != TypeCode.Object)
{
return(null);
}
if (SkipCheck(type.ToString(), context.Options))
{
return(null);
}
if (type.IsConstructedGenericType)
{
type.GetGenericArguments().ToList().ForEach(t => PopulateTypeDefinition(t, context));
type = type.GetGenericTypeDefinition();
}
var existing = context.Types.FirstOrDefault(t => t.ClrType == type);
if (existing != null)
{
return(existing);
}
var interfaceRefs = GetInterfaces(type, context);
var useInterface = context.Options.UseInterfaceForClasses;
var isInterface = type.IsInterface || (useInterface != null && useInterface(type));
var baseTypeRef = string.Empty;
if (type.IsClass)
{
if (type.BaseType != typeof(object) && PopulateTypeDefinition(type.BaseType, context) != null)
{
baseTypeRef = GetTypeRef(type.BaseType, context);
}
else if (context.Options.DefaultBaseType != null)
{
baseTypeRef = context.Options.DefaultBaseType(type);
}
}
string declaration, typeName;
if (!type.IsGenericType)
{
typeName = declaration = ApplyRename(type.Name, context);
}
else
{
var genericPrms = type.GetGenericArguments().Select(g => {
var constraints = g.GetGenericParameterConstraints()
.Where(c => PopulateTypeDefinition(c, context) != null)
.Select(c => GetTypeRef(c, context))
.ToList();
if (g.IsClass &&
(useInterface == null || !useInterface(type)) &&
g.GenericParameterAttributes.HasFlag(GenericParameterAttributes.DefaultConstructorConstraint))
{
constraints.Add($"{{ new(): {g.Name} }}");
}
if (constraints.Any())
{
return($"{g.Name} extends {string.Join(" & ", constraints)}");
}
return(g.Name);
});
typeName = ApplyRename(StripGenericFromName(type.Name), context);
var genericPrmStr = string.Join(", ", genericPrms);
declaration = $"{typeName}<{genericPrmStr}>";
}
CtorDefinition ctor = null;
if (isInterface)
{
declaration = $"export interface {declaration}";
if (!string.IsNullOrEmpty(baseTypeRef))
{
interfaceRefs.Insert(0, baseTypeRef);
}
}
else
{
var abs = type.IsAbstract ? " abstract" : string.Empty;
declaration = $"export{abs} class {declaration}";
if (!string.IsNullOrEmpty(baseTypeRef))
{
declaration = $"{declaration} extends {baseTypeRef}";
}
var ctorGenerator = context.Options.CtorGenerator;
if (ctorGenerator != null)
{
ctor = ctorGenerator(type);
}
}
if (interfaceRefs.Any())
{
var imp = isInterface ? "extends" : "implements";
var interfaceRefStr = string.Join(", ", interfaceRefs);
declaration = $"{declaration} {imp} {interfaceRefStr}";
}
var typeDef = new TypeDefinition(type, typeName, declaration, ctor);
context.Types.Add(typeDef);
typeDef.Members.AddRange(GetMembers(type, context));
typeDef.Methods.AddRange(GetMethods(type, context));
return(typeDef);
}
private static string GetTypeRef(Type type, TypeScriptContext context)
{
if (type.IsGenericParameter)
{
return(type.Name);
}
if (type.IsEnum)
{
var enumDef = PopulateEnumDefinition(type, context);
return(enumDef != null ? enumDef.Name : "any");
}
var typeCode = Type.GetTypeCode(type);
if (typeCode != TypeCode.Object)
{
return(GetPrimitiveMemberType(typeCode, context.Options));
}
Type dictionaryType;
if (IsClosedDictionaryType(type))
{
dictionaryType = type;
}
else
{
dictionaryType = type.GetInterfaces().FirstOrDefault(IsClosedDictionaryType);
}
if (dictionaryType != null)
{
var keyType = type.GetGenericArguments().ElementAt(0);
var valueType = type.GetGenericArguments().ElementAt(1);
return($"Record<{GetTypeRef(keyType, context)}, {GetTypeRef(valueType, context)}>");
}
Type enumerable;
if (IsClosedEnumerableType(type))
{
enumerable = type;
}
else
{
enumerable = type.GetInterfaces().FirstOrDefault(IsClosedEnumerableType);
}
if (enumerable != null)
{
return($"Array<{GetTypeRef(enumerable.GetGenericArguments().First(), context)}>");
}
var typeDef = PopulateTypeDefinition(type, context);
if (typeDef == null)
{
return("any");
}
var typeName = typeDef.Name;
if (type.IsGenericType)
{
var genericPrms = type.GetGenericArguments().Select(t => GetTypeRef(t, context));
return($"{typeName}<{string.Join(", ", genericPrms)}>");
}
return(typeName);
}
