task: add the task selection skeleton

go/configs/config.go

@@ -47,16 +47,31 @@ func GetConfig() (*Config, error) {
 	file, err := getConfigFile(ConfigFileName)
 	if err != nil {
 		if err == ErrConfigNotInitialized {
-			config, err := initializeConfig(file)
-			if err != nil {
-				return config, err
-			}
+			return initializeConfig(file)
 		}
+		return nil, err
 	}
 
+	defer file.Close()
+
 	return getConfig(file)
 }
 
+func (config *Config) Summarize() {
+	fmt.Printf("The project path is %s\nThe volume path is %s\n", config.ProjectPath, config.VolumePath)
+	if config.LoginCredential.Username != "" && config.LoginCredential.Password != "" {
+		fmt.Printf("Login credential [%s] is configured\n", config.LoginCredential.Username)
+	}
+
+	if len(config.RepositoryConfig) > 0 {
+		for name := range config.RepositoryConfig {
+			fmt.Printf("Repository [%s] is added\n", name)
+		}
+	} else {
+		fmt.Println("No repository is added")
+	}
+}
+
 func initializeConfig(w io.WriteCloser) (*Config, error) {
 	config := &Config{}
 	fmt.Printf("Set the project path: ")
@@ -109,13 +124,23 @@ func initializeConfig(w io.WriteCloser) (*Config, error) {
 	return config, nil
 }
 
-func getConfig(f io.Reader) (*Config, error) {
+func getConfig(f *os.File) (*Config, error) {
 	config := &Config{}
-	bytes := make([]byte, 0)
-	_, err := f.Read(bytes)
+
+	info, err := f.Stat()
 	if err != nil {
 		return nil, err
 	}
+	bytes := make([]byte, info.Size())
+	n, err := f.Read(bytes)
+	if err != nil {
+		return nil, err
+	}
+
+	if n == 0 {
+		// The file exists, but it's empty file, so we need to initalize
+		return initializeConfig(f)
+	}
 
 	err = json.Unmarshal(bytes, &config)
 	if err != nil {

go/main.go

@@ -5,6 +5,7 @@ import (
 	"ocl/portainer-devtool/configs"
 	"ocl/portainer-devtool/tasks"
 	"ocl/portainer-devtool/utils"
+	"strconv"
 )
 
 func main() {
@@ -14,6 +15,8 @@ func main() {
 		log.Fatalln(err)
 	}
 
+	config.Summarize()
+
 	// Init tasks
 
 	taskItems := []tasks.Tasker{
@@ -34,8 +37,23 @@ func main() {
 			//  5. Quit`)
 		}
 
-		utils.PromptMenu(printMainMenu)
+		option := utils.SelectMenuItem(printMainMenu)
 
+		index, err := strconv.Atoi(option)
+		if err != nil {
+			log.Printf("please type the option number\n")
+			continue
+		}
+
+		if index < 1 || index > len(taskItems) {
+			log.Printf("no such option %s, please select again\n", option)
+			continue
+		}
+
+		err = taskItems[index-1].Execute()
+		if err != nil {
+			log.Fatalln(err)
+		}
 	}
 
 }

go/tasks/jwt_token_gen.go

@@ -1,11 +1,22 @@
 package tasks
 
-import "ocl/portainer-devtool/configs"
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"ocl/portainer-devtool/configs"
+)
 
 type GenerateJwtTokenTask struct {
 	Config *configs.Config
 }
 
+type GenerateJwtTokenResponse struct {
+	JWT string `json:"jwt"`
+}
+
 func NewGenerateJwtTokenTask(cfg *configs.Config) *GenerateJwtTokenTask {
 	return &GenerateJwtTokenTask{
 		Config: cfg,
@@ -13,6 +24,31 @@ func NewGenerateJwtTokenTask(cfg *configs.Config) *GenerateJwtTokenTask {
 }
 
 func (task *GenerateJwtTokenTask) Execute() error {
+	postBody, _ := json.Marshal(map[string]string{
+		"username": task.Config.LoginCredential.Username,
+		"password": task.Config.LoginCredential.Password,
+	})
+
+	responseBody := bytes.NewBuffer(postBody)
+	resp, err := http.Post(task.Config.LoginCredential.Address, "application/json", responseBody)
+	if err != nil {
+		return fmt.Errorf("http requset error: %s", err.Error())
+	}
+	defer resp.Body.Close()
+
+	//Read the response body
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to parse the response body: %s", err.Error())
+	}
+
+	var ret GenerateJwtTokenResponse
+	err = json.Unmarshal(body, &ret)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("jwt token is:\n%s\n", ret.JWT)
 	return nil
 }
 

go/utils/prompt.go

@@ -23,7 +23,7 @@ func PromptConfirm(question string) bool {
 	return false
 }
 
-func PromptMenu(listMenu func()) string {
+func SelectMenuItem(listMenu func()) string {
 	listMenu()
 
 	var option string