stubs for codegen

kitcom/gogen.go

@@ -1 +1,9 @@
 package main
+
+type GoApiGenerator struct {
+}
+
+func (g *GoApiGenerator) Generate(api *Api, destFile string) error {
+	//TODO implement me
+	panic("implement me")
+}

kitcom/goparser.go

@@ -19,14 +19,14 @@ type apiStruct struct {
 type GoApiParser struct {
 }
 
-func (g *GoApiParser) Parse(sourceFile string) (Api, error) {
+func (g *GoApiParser) Parse(sourceFile string) (*Api, error) {
 
 	var apiStructs []*apiStruct
 
 	fileSet := token.NewFileSet()
 	astFile, err := parser.ParseFile(fileSet, sourceFile, nil, parser.ParseComments|parser.SkipObjectResolution)
 	if err != nil {
-		return Api{}, fmt.Errorf("parse file: %w", err)
+		return nil, fmt.Errorf("parse file: %w", err)
 	}
 
 	pkgName := astFile.Name.Name
@@ -65,11 +65,11 @@ func (g *GoApiParser) Parse(sourceFile string) (Api, error) {
 	}
 
 	if len(apiStructs) == 0 {
-		return Api{}, fmt.Errorf("no api struct found")
+		return nil, fmt.Errorf("no api struct found")
 	}
 
 	if len(apiStructs) > 1 {
-		return Api{}, fmt.Errorf("multiple api struct found")
+		return nil, fmt.Errorf("multiple api struct found")
 	}
 
 	for _, decl := range astFile.Decls {
@@ -106,5 +106,5 @@ func (g *GoApiParser) Parse(sourceFile string) (Api, error) {
 		}
 	}
 
-	return Api{}, nil
+	return nil, nil
 }

kitcom/main.go

@@ -31,7 +31,11 @@ type Api struct {
 }
 
 type ApiParser interface {
-	Parse(sourceFile string) (Api, error)
+	Parse(sourceFile string) (*Api, error)
+}
+
+type ApiGenerator interface {
+	Generate(api *Api, destFile string) error
 }
 
 func main() {
@@ -51,9 +55,10 @@ func main() {
 		log.Panic(err)
 	}
 
-	//Dest, err = filepath.Abs(Dest)
-	//if err != nil {
-	//}
+	destAbs, err := filepath.Abs(Dest)
+	if err != nil {
+		log.Panic(err)
+	}
 
 	if err := checkIsFile(srcAbs); err != nil {
 		log.Panic(err)
@@ -64,10 +69,19 @@ func main() {
 		log.Panic(err)
 	}
 
-	_, err = apiParser.Parse(srcAbs)
+	api, err := apiParser.Parse(srcAbs)
 	if err != nil {
 		log.Panic(err)
 	}
+
+	apiGenerator, err := apiGeneratorByExt(destAbs)
+	if err != nil {
+		log.Panic(err)
+	}
+
+	if err := apiGenerator.Generate(api, destAbs); err != nil {
+		log.Panic(err)
+	}
 }
 
 func checkIsFile(src string) error {
@@ -95,3 +109,18 @@ func apiParserByExt(src string) (ApiParser, error) {
 		return nil, fmt.Errorf("unsupported file extension: %s", path.Ext(src))
 	}
 }
+
+func apiGeneratorByExt(dest string) (ApiGenerator, error) {
+	switch path.Ext(dest) {
+	case ".go":
+		return &GoApiGenerator{}, nil
+	case ".ts":
+		return &TypescriptApiGenerator{}, nil
+	case ".js":
+		return nil, fmt.Errorf("vanilla javascript is not supported and never will be")
+	case "":
+		return nil, fmt.Errorf("could not find file extension for %s", dest)
+	default:
+		return nil, fmt.Errorf("unsupported file extension: %s", path.Ext(dest))
+	}
+}

kitcom/tsgen.go

@@ -1 +1,9 @@
 package main
+
+type TypescriptApiGenerator struct {
+}
+
+func (g *TypescriptApiGenerator) Generate(api *Api, destFile string) error {
+	//TODO implement me
+	panic("implement me")
+}

kitcom/tsparser.go

@@ -21,17 +21,17 @@ type TypescriptApiParser struct {
 type apiClass struct {
 }
 
-func (t *TypescriptApiParser) Parse(sourceFilePath string) (Api, error) {
+func (t *TypescriptApiParser) Parse(sourceFilePath string) (*Api, error) {
 
 	f, err := os.Open(sourceFilePath)
 	if err != nil {
-		return Api{}, fmt.Errorf("failed to open file: %w", err)
+		return nil, fmt.Errorf("failed to open file: %w", err)
 	}
 	defer f.Close()
 
 	fileContents, err := io.ReadAll(f)
 	if err != nil {
-		return Api{}, fmt.Errorf("failed to read file: %w", err)
+		return nil, fmt.Errorf("failed to read file: %w", err)
 	}
 
 	sourceFile := parser.ParseSourceFile(ast.SourceFileParseOptions{
@@ -74,12 +74,12 @@ func (t *TypescriptApiParser) Parse(sourceFilePath string) (Api, error) {
 	})
 
 	if len(apiClasses) == 0 {
-		return Api{}, fmt.Errorf("no api class found")
+		return nil, fmt.Errorf("no api class found")
 	}
 
 	if len(apiClasses) > 1 {
-		return Api{}, fmt.Errorf("multiple api classes found")
+		return nil, fmt.Errorf("multiple api classes found")
 	}
 
-	return Api{}, nil
+	return nil, nil
 }