(goctl): support nested struct

tools/goctl/api/dartgen/gendata.go

@@ -1,15 +1,16 @@
 package dartgen
 
 import (
+	"bytes"
 	"os"
 	"strings"
 	"text/template"
 
 	"github.com/zeromicro/go-zero/tools/goctl/api/spec"
 )
 
-const dataTemplate = `// --{{with .Info}}{{.Title}}{{end}}--
-{{ range .Types}}
+const dataTemplate = `// --{{with .APISpec.Info}}{{.Title}}{{end}}--
+{{ range .APISpec.Types}}
 class {{.Name}}{
 	{{range .Members}}
 	/// {{.Comment}}
@@ -28,12 +29,16 @@ class {{.Name}}{
 			'{{getPropertyFromMember .}}': {{if isDirectType .Type.Name}}{{lowCamelCase .Name}}{{else if isClassListType .Type.Name}}{{lowCamelCase .Name}}.map((i) => i.toJson()){{else}}{{lowCamelCase .Name}}.toJson(){{end}},{{end}}
 		};
 	}
+
+	{{ range $.InnerClassList}}
+	{{.}}
+	{{end}}
 }
 {{end}}
 `
 
-const dataTemplateV2 = `// --{{with .Info}}{{.Title}}{{end}}--
-{{ range .Types}}
+const dataTemplateV2 = `// --{{with .APISpec.Info}}{{.Title}}{{end}}--
+{{ range .APISpec.Types}}
 class {{.Name}} {
 	{{range .Members}}
 	{{if .Comment}}{{.Comment}}{{end}}
@@ -73,9 +78,18 @@ class {{.Name}} {
 			,{{end}}
 		};
 	}
+
+	{{ range $.InnerClassList}}
+	{{.}}
+	{{end}}
 }
 {{end}}`
 
+type DartSpec struct {
+	APISpec        *spec.ApiSpec
+	InnerClassList []string
+}
+
 func genData(dir string, api *spec.ApiSpec, isLegacy bool) error {
 	err := os.MkdirAll(dir, 0o755)
 	if err != nil {
@@ -104,12 +118,12 @@ func genData(dir string, api *spec.ApiSpec, isLegacy bool) error {
 		return err
 	}
 
-	err = convertDataType(api)
+	err, dartSpec := convertDataType(api, isLegacy)
 	if err != nil {
 		return err
 	}
 
-	return t.Execute(file, api)
+	return t.Execute(file, dartSpec)
 }
 
 func genTokens(dir string, isLeagcy bool) error {
@@ -132,24 +146,61 @@ func genTokens(dir string, isLeagcy bool) error {
 	return err
 }
 
-func convertDataType(api *spec.ApiSpec) error {
+func convertDataType(api *spec.ApiSpec, isLegacy bool) (error, *DartSpec) {
+	var result DartSpec
 	types := api.Types
 	if len(types) == 0 {
-		return nil
+		return nil, &result
 	}
 
 	for _, ty := range types {
 		defineStruct, ok := ty.(spec.DefineStruct)
 		if ok {
 			for index, member := range defineStruct.Members {
-				tp, err := specTypeToDart(member.Type)
-				if err != nil {
-					return err
+				structMember, ok := member.Type.(spec.DefineStruct)
+				if ok && structMember.IsNestedStruct() {
+					defineStruct.Members[index].Type = spec.PrimitiveType{RawName: member.Name}
+					t := template.New("dataTemplate")
+					t = t.Funcs(funcMap)
+					tpl := dataTemplateV2
+					if isLegacy {
+						tpl = dataTemplate
+					}
+					t, err := t.Parse(tpl)
+					if err != nil {
+						return err, nil
+					}
+
+					var innerClassSpec = &spec.ApiSpec{
+						Types: []spec.Type{
+							spec.DefineStruct{
+								RawName: member.Name,
+								Members: structMember.Members,
+							},
+						},
+					}
+					err, dartSpec := convertDataType(innerClassSpec, isLegacy)
+					if err != nil {
+						return err, nil
+					}
+
+					writer := bytes.NewBuffer(nil)
+					err = t.Execute(writer, dartSpec)
+					if err != nil {
+						return err, nil
+					}
+					result.InnerClassList = append(result.InnerClassList, writer.String())
+				} else {
+					tp, err := specTypeToDart(member.Type)
+					if err != nil {
+						return err, nil
+					}
+					defineStruct.Members[index].Type = buildSpecType(member.Type, tp)
 				}
-				defineStruct.Members[index].Type = buildSpecType(member.Type, tp)
 			}
 		}
 	}
+	result.APISpec = api
 
-	return nil
+	return nil, &result
 }

tools/goctl/api/gogen/gen_test.go

@@ -57,6 +57,8 @@ var (
 	importTwiceApi string
 	//go:embed testdata/another_import_api.api
 	anotherImportApi string
+	//go:embed testdata/example.api
+	exampleApi string
 )
 
 func TestParser(t *testing.T) {
@@ -316,15 +318,32 @@ func TestCamelStyle(t *testing.T) {
 	validateWithCamel(t, filename, "GoZero")
 }
 
+func TestExampleGen(t *testing.T) {
+	env.Set(t, env.GoctlExperimental, env.ExperimentalOn)
+	filename := "greet.api"
+	err := os.WriteFile(filename, []byte(exampleApi), os.ModePerm)
+	assert.Nil(t, err)
+	t.Cleanup(func() {
+		_ = os.Remove(filename)
+	})
+
+	spec, err := parser.Parse(filename)
+	assert.Nil(t, err)
+	assert.Equal(t, len(spec.Types), 10)
+
+	validate(t, filename)
+}
+
 func validate(t *testing.T, api string) {
 	validateWithCamel(t, api, "gozero")
 }
 
 func validateWithCamel(t *testing.T, api, camel string) {
 	dir := "workspace"
-	defer func() {
-		os.RemoveAll(dir)
-	}()
+	t.Cleanup(func() {
+		_ = os.RemoveAll(dir)
+	})
+
 	err := pathx.MkdirIfNotExist(dir)
 	assert.Nil(t, err)
 	err = initMod(dir)

tools/goctl/api/gogen/gentypes.go

@@ -74,8 +74,21 @@ func writeType(writer io.Writer, tp spec.Type) error {
 		return fmt.Errorf("unspport struct type: %s", tp.Name())
 	}
 
-	fmt.Fprintf(writer, "type %s struct {\n", util.Title(tp.Name()))
-	for _, member := range structType.Members {
+	_, err := fmt.Fprintf(writer, "type %s struct {\n", util.Title(tp.Name()))
+	if err != nil {
+		return err
+	}
+
+	if err := writeMember(writer, structType.Members); err != nil {
+		return err
+	}
+
+	_, err = fmt.Fprintf(writer, "}")
+	return err
+}
+
+func writeMember(writer io.Writer, members []spec.Member) error {
+	for _, member := range members {
 		if member.IsInline {
 			if _, err := fmt.Fprintf(writer, "%s\n", strings.Title(member.Type.Name())); err != nil {
 				return err
@@ -88,6 +101,5 @@ func writeType(writer io.Writer, tp spec.Type) error {
 			return err
 		}
 	}
-	fmt.Fprintf(writer, "}")
 	return nil
 }

tools/goctl/api/gogen/testdata/example.api

@@ -0,0 +1,99 @@
+syntax = "v1"
+
+info(
+    title: "demo title"
+    desc: "demo desc"
+    author: "keson.an"
+    date: "2024-06-25"
+    version: "v1"
+)
+
+// empty structure
+type Foo {
+}
+
+// type lit
+type Bar {
+    Foo int `json:"foo"`
+    Bar bool `json:"bar"`
+    Baz []string `json:"baz"`
+    Qux map[string]string `json:"qux"`
+}
+
+type Baz {
+    Foo    `json:"foo"`
+    // array type
+    Arr [2]int `json:"arr"`
+    // nested type
+    Bar {
+        Foo string `json:"foo"`
+        Bar bool `json:"bar"`
+        Baz {
+            Foo string `json:"foo"`
+            Bar bool `json:"bar"`
+        }
+        Qux {
+            Foo string `json:"foo"`
+            Bar bool `json:"bar"`
+        } `json:"qux"`
+    } `json:"bar"`
+}
+
+
+type UpdateReq {
+    Arg1 string `json:"arg1"`
+}
+
+type ListItem {
+    Value1 string `json:"value1"`
+}
+
+type LoginReq {
+    Username string `json:"username"`
+    Password string `json:"password"`
+}
+
+type LoginResp {
+    Name string `json:"name"`
+}
+
+type FormExampleReq {
+    Name string `form:"name"`
+}
+
+type PathExampleReq {
+    ID string `path:"id"`
+}
+
+type PathExampleResp {
+    Name string `json:"name"`
+}
+
+@server(
+    jwt: Auth
+    prefix:     /v1
+    group: g1
+    timeout:    3s
+    middleware: AuthInterceptor
+    maxBytes:   1048576
+)
+service Foo {
+    @handler ping
+    get /ping
+
+    @handler update
+    post /update (UpdateReq)
+
+    @handler list
+    get /list returns ([]ListItem)
+
+    @handler login
+    post /login (LoginReq) returns (LoginResp)
+
+    @handler formExample
+    post /form/example (FormExampleReq)
+
+    @handler pathExample
+    get /path/example/:id (PathExampleReq) returns (PathExampleResp)
+}
+

tools/goctl/api/gogen/util.go

@@ -59,16 +59,59 @@ func genFile(c fileGenConfig) error {
 
 func writeProperty(writer io.Writer, name, tag, comment string, tp spec.Type, indent int) error {
 	util.WriteIndent(writer, indent)
-	var err error
+	var (
+		err            error
+		isNestedStruct bool
+	)
+	structType, ok := tp.(spec.DefineStruct)
+	if ok && structType.IsNestedStruct() {
+		isNestedStruct = true
+	}
 	if len(comment) > 0 {
 		comment = strings.TrimPrefix(comment, "//")
 		comment = "//" + comment
-		_, err = fmt.Fprintf(writer, "%s %s %s %s\n", strings.Title(name), tp.Name(), tag, comment)
+	}
+
+	if isNestedStruct {
+		_, err = fmt.Fprintf(writer, "%s struct {\n", strings.Title(name))
+		if err != nil {
+			return err
+		}
+
+		if err := writeMember(writer, structType.Members); err != nil {
+			return err
+		}
+
+		_, err := fmt.Fprintf(writer, "} %s", tag)
+		if err != nil {
+			return err
+		}
+
+		if len(comment) > 0 {
+			_, err = fmt.Fprintf(writer, " %s", comment)
+			if err != nil {
+				return err
+			}
+		}
+		_, err = fmt.Fprint(writer, "\n")
+		if err != nil {
+			return err
+		}
 	} else {
-		_, err = fmt.Fprintf(writer, "%s %s %s\n", strings.Title(name), tp.Name(), tag)
+		if len(comment) > 0 {
+			_, err = fmt.Fprintf(writer, "%s %s %s %s\n", strings.Title(name), tp.Name(), tag, comment)
+			if err != nil {
+				return err
+			}
+		} else {
+			_, err = fmt.Fprintf(writer, "%s %s %s\n", strings.Title(name), tp.Name(), tag)
+			if err != nil {
+				return err
+			}
+		}
 	}
 
-	return err
+	return nil
 }
 
 func getAuths(api *spec.ApiSpec) []string {

tools/goctl/api/parser/g4/ast/import.go

@@ -1,8 +1,6 @@
 package ast
 
-import (
-	"github.com/zeromicro/go-zero/tools/goctl/api/parser/g4/gen/api"
-)
+import "github.com/zeromicro/go-zero/tools/goctl/api/parser/g4/gen/api"
 
 // ImportExpr defines import syntax for api
 type ImportExpr struct {