wip 0.0.5

cmd/cli/tools/prompt/credentials/credentials.go

@@ -2,14 +2,48 @@ package credentials
 
 import (
 	"bufio"
+	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"golang.org/x/term"
 )
 
-func Read() (string, string, error) {
+type (
+	credential struct {
+		Username string `json:"username"`
+		Password string `json:"password"`
+	}
+
+	credentialsStore struct {
+		Store map[string]credential `json:"store"`
+	}
+)
+
+var (
+	datastorePath string
+)
+
+func init() {
+	roaming, err := os.UserConfigDir()
+	if err != nil {
+		panic("failed to get user config path: " + err.Error())
+	}
+	datastorePath = filepath.Join(roaming, "cloudsave")
+}
+
+func Read(server string) (string, string, error) {
+	var err error
+	store, err := load()
+	if err == nil {
+		if c, ok := store[server]; ok {
+			return c.Username, c.Password, nil
+		}
+	}
+
 	fmt.Print("Enter username: ")
 	reader := bufio.NewReader(os.Stdin)
 	username, _ := reader.ReadString('\n')
@@ -24,3 +58,66 @@ func Read() (string, string, error) {
 
 	return username, string(password), nil
 }
+
+func Login(username, password, server string) error {
+	store, err := load()
+	if err != nil {
+		return err
+	}
+
+	store[server] = credential{
+		Username: username,
+		Password: password,
+	}
+
+	return save(store)
+}
+
+func Logout(server string) error {
+	store, err := load()
+	if err != nil {
+		return err
+	}
+
+	delete(store, server)
+
+	return save(store)
+}
+
+func save(store map[string]credential) error {
+	c := credentialsStore{
+		Store: store,
+	}
+
+	f, err := os.OpenFile(filepath.Join(datastorePath, "credential.json"), os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0740)
+	if err != nil {
+		return fmt.Errorf("failed to open datastore: %w", err)
+	}
+	defer f.Close()
+
+	e := json.NewEncoder(f)
+	if err := e.Encode(c); err != nil {
+		return fmt.Errorf("failed to encode data: %w", err)
+	}
+
+	return nil
+}
+
+func load() (map[string]credential, error) {
+	f, err := os.OpenFile(filepath.Join(datastorePath, "credential.json"), os.O_RDONLY, 0)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return make(map[string]credential), nil
+		}
+		return nil, fmt.Errorf("failed to open datastore: %w", err)
+	}
+	defer f.Close()
+
+	var c credentialsStore
+	d := json.NewDecoder(f)
+	if err := d.Decode(&c); err != nil {
+		return nil, fmt.Errorf("failed to decode data: %w", err)
+	}
+
+	return c.Store, nil
+}