public static string GenerateGlueCode(TypescriptGenerationOptions opts, IEnumerable <Type> types)
{
var ctx = new TypescriptTypeMapping(opts);
var code = new TypescriptCodeBuilder();
var ctor = new List <string>();
var fields = new List <string>();
var interfaceFields = new List <string>();
foreach (var type in types)
{
var proxyClassName = "CoreRpcProxyFor" + type.Name;
var proxyFieldName = opts.ApiFieldNamingPolicy(type);
var proxyInterfaceName = "I" + proxyClassName;
foreach (var iface in new[] { true, false })
{
if (iface)
{
code.BeginInterface(proxyInterfaceName);
}
else
{
code.BeginClass(proxyClassName + " implements " + proxyInterfaceName);
code.AppendLines(
$"private parent: {opts.ClassName};",
$"constructor (parent: {opts.ClassName}){{this.parent = parent;}}"
);
}
var target = opts.TargetNameExtractor.GetTargetName(type);
foreach (var m in type.GetMethods())
{
if (m.DeclaringType == typeof(System.Object))
{
continue;
}
var sig = Convert.ToBase64String(opts.Binder.GetMethodSignature(m));
code.BeginMethod(opts.ApiMethodNamingPolicy(m.Name), iface ? (bool?)null : true);
var names = new List <string>();
foreach (var p in m.GetParameters())
{
code.AppendMethodParameter(p.Name, ctx.MapType(p.ParameterType));
names.Add(p.Name);
}
var returnType = m.ReturnType;
if (returnType == typeof(Task))
{
returnType = typeof(void);
}
else if (returnType.IsConstructedGenericType &&
returnType.GetGenericTypeDefinition() == typeof(Task <>))
{
returnType = returnType.GetGenericArguments()[0];
}
var returnTypeName = ctx.MapType(returnType);
code.AppendMethodReturnValue("Promise<" + returnTypeName + ">");
if (iface)
{
code.AppendSemicolon();
}
else
{
code.BeginBody();
var req =
$"{{Target: '{target}', MethodSignature: '{sig}', Arguments: [{string.Join(",", names)}] }}";
code.AppendLine($"return this.parent.send<{returnTypeName}>({req});");
code.End();
}
}
code.End();
}
interfaceFields.Add($"{proxyFieldName} : " + proxyInterfaceName + ";");
fields.Add($"{proxyFieldName} : " + proxyClassName + ";");
ctor.Add($"this.{proxyFieldName} = new {proxyClassName}(this);");
}
var resultFieldName = "Result";
var exceptionFieldName = "Exception";
code.BeginInterface("I" + opts.ClassName);
code.AppendLines(interfaceFields.ToArray());
code.End();
code.BeginClass(opts.ClassName + " implements I" + opts.ClassName);
code.AppendLines(
"private baseUrl: string;",
"private fetch: (url: string, init: RequestInit) => Promise<Response>;",
"constructor(baseUrl : string, customFetch?: (url: string, init: RequestInit) => Promise<Response>) {",
"this.baseUrl = baseUrl;",
"if(customFetch) this.fetch = customFetch; else this.fetch = (r, i) => fetch(r, i);"
);
code.AppendLines(ctor.ToArray());
code.AppendLine("}");
code.AppendLines(
"public send<T>(request: any) : Promise<T>{",
"return this.fetch(this.baseUrl, {method: 'post', body: JSON.stringify(request)})",
" .then(response => {",
" if (!response.ok)",
" throw new Error(response.statusText);",
" return response.json();",
" }).then(jr => {",
$" const r = <{{{resultFieldName}?: T, {exceptionFieldName}?: string}}>jr;",
$" if(r.{exceptionFieldName}) throw r.{exceptionFieldName};",
$" return r.{resultFieldName}!;",
" });",
"}"
);
code.AppendLines(fields.ToArray());
code.End();
return((ctx + "\n" + code).Replace("\r\n", "\n"));
}
public TypescriptTypeMapping(TypescriptGenerationOptions opts)
{
_opts = opts;
}