From 2ab17147fb6c58187c4e02948a4687cc6a25a647 Mon Sep 17 00:00:00 2001
From: oscar <oscarzhou0727@icloud.com>
Date: Wed, 21 Sep 2022 17:00:10 +1200
Subject: [PATCH] config: initialize and read config file

---
 go/configs/config.go | 147 +++++++++++++++++++++++++++++++++++++++++++
 go/utils/prompt.go   |  15 ++++-
 2 files changed, 159 insertions(+), 3 deletions(-)
 create mode 100644 go/configs/config.go

diff --git a/go/configs/config.go b/go/configs/config.go
new file mode 100644
index 0000000..6534be0
--- /dev/null
+++ b/go/configs/config.go
@@ -0,0 +1,147 @@
+package configs
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+)
+
+const (
+	ConfigFileName string = ".devtool"
+)
+
+var (
+	ErrConfigNotInitialized error = errors.New("Config file is not initialized")
+)
+
+type Config struct {
+	// ProjectPath is where all git repositories will be downloaded to
+	ProjectPath string
+	// VolumePath is where all the persisitant data will be saved to
+	VolumePath string
+	//
+	LoginCredential LoginCredential
+	//
+	RepositoryConfig map[string]RepositoryConfig
+}
+
+// LoginCredential stores the user credential for API request
+type LoginCredential struct {
+	Username string
+	Password string
+	Address  string
+}
+
+type RepositoryConfig struct {
+	Name        string
+	URL         string
+	Directory   string
+	Private     bool
+	GitUsername string
+	GitPassword string
+}
+
+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 getConfig(file)
+}
+
+func initializeConfig(w io.WriteCloser) (*Config, error) {
+	config := &Config{}
+	fmt.Printf("Set the project path: ")
+	fmt.Scanf("%s", &(config.ProjectPath))
+
+	fmt.Printf("Set the volume path: ")
+	fmt.Scanf("%s", &(config.VolumePath))
+
+	var loginCredential LoginCredential
+	fmt.Printf("Set login credential username(admin): ")
+	fmt.Scanf("%s", &(loginCredential.Username))
+	if loginCredential.Username == "" {
+		loginCredential.Username = "admin"
+	}
+
+	for {
+		fmt.Printf("Set login credential password(******): ")
+		fmt.Scanf("%s", &(loginCredential.Password))
+		if loginCredential.Password != "" {
+			break
+		}
+
+		fmt.Println("Login credential password must be provided")
+	}
+
+	fmt.Printf("Set login address(127.0.0.1): ")
+	fmt.Scanf("%s", &(loginCredential.Address))
+	if loginCredential.Address == "" {
+		loginCredential.Address = "http://127.0.0.1:9000/api/auth"
+	} else {
+		loginCredential.Address = fmt.Sprintf("http://%s:9000/api/auth", loginCredential.Address)
+	}
+
+	config.LoginCredential = loginCredential
+
+	// able to configure multiple project
+	// if utils.PromptConfirm("Do you want to configure the repository now?") {
+	// 	// configure repository
+	// }
+
+	bytes, err := json.Marshal(config)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = w.Write(bytes)
+	if err != nil {
+		return nil, err
+	}
+	return config, nil
+}
+
+func getConfig(f io.Reader) (*Config, error) {
+	config := &Config{}
+	bytes := make([]byte, 0)
+	_, err := f.Read(bytes)
+	if err != nil {
+		return nil, err
+	}
+
+	err = json.Unmarshal(bytes, &config)
+	if err != nil {
+		return nil, err
+	}
+	return config, nil
+}
+
+// getConfigFile get the config file handler
+func getConfigFile(name string) (*os.File, error) {
+	_, err := os.Stat(name)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			//create file
+			file, err := os.Create(name)
+			if err != nil {
+				return nil, fmt.Errorf("fail to create config file: %w", err)
+			}
+
+			// first set up the git project path and volume path
+			// git credential
+
+			return file, err
+		} else {
+			return nil, err
+		}
+	}
+	return os.OpenFile(name, os.O_RDWR, 0644)
+}
diff --git a/go/utils/prompt.go b/go/utils/prompt.go
index 8fd6eed..827881e 100644
--- a/go/utils/prompt.go
+++ b/go/utils/prompt.go
@@ -14,11 +14,20 @@ func PromptContinue() bool {
 	return false
 }
 
-func PromptMenu(listMenu func()) int {
+func PromptConfirm(question string) bool {
+	ret := fmt.Sprintf("%s (y/n)?", question)
+	if ret == "y" || ret == "yes" {
+		return true
+	}
+
+	return false
+}
+
+func PromptMenu(listMenu func()) string {
 	listMenu()
 
-	var option int
-	fmt.Scanf("%d", &option)
+	var option string
+	fmt.Scanf("%s", &option)
 	return option
 }