fix bug: generating dart code error (#1090)

tools/goctl/api/dartgen/util.go

@@ -1,6 +1,8 @@
 package dartgen
 
 import (
+	"errors"
+	"fmt"
 	"os"
 	"strings"
 
@@ -82,3 +84,91 @@ func fileExists(path string) bool {
 	_, err := os.Stat(path)
 	return !os.IsNotExist(err)
 }
+
+func buildSpecType(tp spec.Type, name string) spec.Type {
+	switch v := tp.(type) {
+	case spec.PrimitiveType:
+		return spec.PrimitiveType{RawName: name}
+	case spec.MapType:
+		return spec.MapType{RawName: name, Key: v.Key, Value: v.Value}
+	case spec.ArrayType:
+		return spec.ArrayType{RawName: name, Value: v.Value}
+	case spec.InterfaceType:
+		return spec.InterfaceType{RawName: name}
+	case spec.PointerType:
+		return spec.PointerType{RawName: name, Type: v.Type}
+	}
+	return tp
+}
+
+func specTypeToDart(tp spec.Type) (string, error) {
+	switch v := tp.(type) {
+	case spec.DefineStruct:
+		return tp.Name(), nil
+	case spec.PrimitiveType:
+		r, ok := primitiveType(tp.Name())
+		if !ok {
+			return "", errors.New("unsupported primitive type " + tp.Name())
+		}
+		return r, nil
+	case spec.MapType:
+		valueType, err := specTypeToDart(v.Value)
+		if err != nil {
+			return "", err
+		}
+
+		return fmt.Sprintf("Map<String, %s>", valueType), nil
+	case spec.ArrayType:
+		if tp.Name() == "[]byte" {
+			return "List<int>", nil
+		}
+
+		valueType, err := specTypeToDart(v.Value)
+		if err != nil {
+			return "", err
+		}
+
+		s := getBaseType(valueType)
+		if len(s) == 0 {
+			return s, errors.New("unsupported primitive type " + tp.Name())
+		}
+
+		return s, nil
+	case spec.InterfaceType:
+		return "Object", nil
+	case spec.PointerType:
+		return specTypeToDart(v.Type)
+	}
+
+	return "", errors.New("unsupported primitive type " + tp.Name())
+}
+
+func getBaseType(valueType string) string {
+	switch valueType {
+	case "int":
+		return "List<int>"
+	case "double":
+		return "List<double>"
+	case "boolean":
+		return "List<bool>"
+	case "String":
+		return "List<String>"
+	default:
+		return ""
+	}
+}
+
+func primitiveType(tp string) (string, bool) {
+	switch tp {
+	case "string":
+		return "String", true
+	case "int", "int8", "int16", "int32", "int64", "uint", "uint8", "uint16", "uint32", "uint64", "rune":
+		return "int", true
+	case "float32", "float64":
+		return "double", true
+	case "bool":
+		return "bool", true
+	}
+
+	return "", false
+}