From 9c56cf4687250ded908ee7a3f5d56596b67a5fee Mon Sep 17 00:00:00 2001
From: "takahiro.tominaga" <tt.300607@gmail.com>
Date: Tue, 7 Feb 2023 23:11:15 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=E7=B0=A1=E6=98=93=E7=9A=84=E3=81=AA?=
 =?UTF-8?q?=E3=83=AD=E3=82=B0=E3=82=A4=E3=83=B3=E3=82=B3=E3=83=9E=E3=83=B3?=
 =?UTF-8?q?=E3=83=89=E3=82=92=E8=BF=BD=E5=8A=A0=20(#13)?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 cmd/login.go   | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++
 cmd/root.go    |  2 ++
 util/config.go | 12 ++++---
 3 files changed, 99 insertions(+), 4 deletions(-)
 create mode 100644 cmd/login.go

diff --git a/cmd/login.go b/cmd/login.go
new file mode 100644
index 0000000..b8dba0d
--- /dev/null
+++ b/cmd/login.go
@@ -0,0 +1,89 @@
+package cmd
+
+import (
+	"bufio"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/android-project-46group/sgi-cli/util"
+	"github.com/spf13/cobra"
+)
+
+// Add login command to rootCmd
+func addLoginCmd() {
+	loginCmd := &cobra.Command{
+		Use:   "login",
+		Short: "login",
+		Long:  `For now, it just receives information from the user and stores it in a file.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Please provide your login information.\n\n")
+			err := login()
+			if err != nil {
+				fmt.Println(err)
+				os.Exit(1)
+			}
+		},
+	}
+
+	rootCmd.AddCommand(loginCmd)
+}
+
+// login is the main logic of the login function.
+//
+// Currently, it only reads the information entered by the user
+// and saves it to the file.
+func login() error {
+	fmt.Printf(" BaseURL: ")
+	url, err := readFromTerminal()
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf(" APIKey: ")
+	key, err := readFromTerminal()
+	if err != nil {
+		return err
+	}
+
+	ac := util.Account{
+		BaseURL: url,
+		APIKey:  key,
+	}
+	acJson, err := json.MarshalIndent(ac, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+
+	// Make the [util.CliDir] directory if needed.
+	err = os.Mkdir(filepath.Join(home, util.CliDir), os.ModePerm)
+	if err != nil && !errors.Is(err, os.ErrExist) {
+		return err
+	}
+
+	joined := filepath.Join(home, util.CliDir, util.AccountFile)
+	if err = os.WriteFile(joined, acJson, 0644); err != nil {
+		return err
+	}
+	fmt.Printf("\nLogin succeeded!\n")
+	fmt.Printf("Your information is stored at: %s\n", joined)
+	return nil
+}
+
+// readFromTerminal reads user's input from the terminal.
+func readFromTerminal() (string, error) {
+	reader := bufio.NewReader(os.Stdin)
+	input, err := reader.ReadString('\n')
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSuffix(input, "\n"), nil
+}
diff --git a/cmd/root.go b/cmd/root.go
index e915a58..49b278a 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -23,6 +23,8 @@ var rootCmd = &cobra.Command{
 func Execute(config util.Config, api api.ApiCaller) {
 	addVersionCmd(config.Version)
 
+	addLoginCmd()
+
 	// Before commands which need API call, validation will be executed.
 	addMemberCmd(api, config)
 	addGroupCmd(api, config)
diff --git a/util/config.go b/util/config.go
index ced2a8f..38a4c52 100644
--- a/util/config.go
+++ b/util/config.go
@@ -31,12 +31,16 @@ type Account struct {
 }
 
 var (
-	// Path to an account setting file from HOME directory
-	accountPath = ".sgi/account.json"
+	// Path to Working directory related to CLI tools.
+	// The path is described relative to the HOME directory.
+	CliDir = ".sgi"
+
+	// Name of the file where the account information is stored.
+	AccountFile = "account.json"
 )
 
 // NewConfig returns a new [Config] instance.
-// The configuration value is obtained from accountPath under the ${HOME} directory.
+// The configuration value is obtained from [AccountFile] under the ${HOME} directory.
 // You need to pass the cli version as an argument.
 func NewConfig(version string) (Config, error) {
 
@@ -48,7 +52,7 @@ func NewConfig(version string) (Config, error) {
 	if err != nil {
 		return cfg, err
 	}
-	joined := filepath.Join(home, accountPath)
+	joined := filepath.Join(home, CliDir, AccountFile)
 
 	f, err := os.Open(joined)
 	if err != nil {