asd

internal/builtin/typescript.go

@@ -0,0 +1,64 @@
+package builtin
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+func generateTypeScriptDefinition(name string, argsType reflect.Type, fnType reflect.Type, isPromise bool, paramTypes map[string]bool) string {
+	if argsType.Kind() != reflect.Struct {
+		return ""
+	}
+
+	var params []string
+	for i := 0; i < argsType.NumField(); i++ {
+		field := argsType.Field(i)
+		fieldName := getFieldName(field)
+		goType := field.Type
+
+		var tsType string
+		var isOptional bool
+		isPointer := goType.Kind() == reflect.Pointer
+
+		if isPointer {
+			isOptional = true
+			tsType = goTypeToTSType(goType, true)
+			if !strings.Contains(tsType, " | null") {
+				tsType += " | null"
+			}
+		} else {
+			isOptional = strings.Contains(field.Tag.Get("json"), ",omitempty")
+			tsType = goTypeToTSType(goType, false)
+			if isOptional && paramTypes[tsType+" | null"] {
+				tsType += " | null"
+			}
+		}
+
+		if isOptional {
+			fieldName += "?"
+		}
+		params = append(params, fmt.Sprintf("%s: %s", fieldName, tsType))
+	}
+
+	returnSignature := "any"
+	if fnType.Kind() == reflect.Func && fnType.NumOut() > 0 {
+		lastIndex := fnType.NumOut() - 1
+		lastType := fnType.Out(lastIndex)
+
+		if lastType.Implements(reflect.TypeOf((*error)(nil)).Elem()) {
+			if fnType.NumOut() > 1 {
+				returnType := fnType.Out(0)
+				returnSignature = goTypeToTSType(returnType, returnType.Kind() == reflect.Pointer)
+			}
+		} else {
+			returnSignature = goTypeToTSType(lastType, lastType.Kind() == reflect.Pointer)
+		}
+	}
+
+	if isPromise {
+		returnSignature = fmt.Sprintf("Promise<%s>", returnSignature)
+	}
+
+	return fmt.Sprintf("declare function %s(%s): %s;", name, strings.Join(params, ", "), returnSignature)
+}