refactor: implement connection pooling and state management for remote explorers

app.go

@@ -16,6 +16,7 @@ import (
 	"goexplore/internal/transfer"
 	"os"
 	"path/filepath"
+	"sync"
 
 	"github.com/google/uuid"
 	"github.com/wailsapp/wails/v2/pkg/runtime"
@@ -25,6 +26,8 @@ type App struct {
 	ctx             context.Context
 	cfg             *config.Config
 	transferManager *transfer.Manager
+	explorers       map[string]explorer.Explorer
+	explorersMu     sync.Mutex
 }
 
 func NewApp() *App {
@@ -38,6 +41,7 @@ func NewApp() *App {
 	return &App{
 		cfg:             cfg,
 		transferManager: transfer.NewManager(3),
+		explorers:       make(map[string]explorer.Explorer),
 	}
 }
 
@@ -123,6 +127,41 @@ func (a *App) ReorderConnections(ids []string) error {
 	return config.SaveConfig(a.cfg)
 }
 
+func (a *App) getConnection(id string) (explorer.Explorer, error) {
+	if id == "local" {
+		return local.New(), nil
+	}
+	
+	a.explorersMu.Lock()
+	defer a.explorersMu.Unlock()
+
+	if exp, ok := a.explorers[id]; ok {
+		return exp, nil
+	}
+
+	exp, err := a.getExplorerForConnection(id)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := exp.Connect(); err != nil {
+		return nil, err
+	}
+
+	a.explorers[id] = exp
+	return exp, nil
+}
+
+func (a *App) DisconnectConnection(id string) {
+	a.explorersMu.Lock()
+	defer a.explorersMu.Unlock()
+
+	if exp, ok := a.explorers[id]; ok {
+		exp.Disconnect()
+		delete(a.explorers, id)
+	}
+}
+
 func (a *App) getExplorerForConnection(id string) (explorer.Explorer, error) {
 	if id == "local" {
 		return local.New(), nil
@@ -160,38 +199,26 @@ func (a *App) getExplorerForConnection(id string) (explorer.Explorer, error) {
 }
 
 func (a *App) ListDir(connId, path string) ([]explorer.FileEntry, error) {
-	exp, err := a.getExplorerForConnection(connId)
+	exp, err := a.getConnection(connId)
 	if err != nil {
 		return nil, err
 	}
-	if err := exp.Connect(); err != nil {
-		return nil, err
-	}
-	defer exp.Disconnect()
 	return exp.ListDir(path)
 }
 
 func (a *App) MkDir(connId, path string) error {
-	exp, err := a.getExplorerForConnection(connId)
+	exp, err := a.getConnection(connId)
 	if err != nil {
 		return err
 	}
-	if err := exp.Connect(); err != nil {
-		return err
-	}
-	defer exp.Disconnect()
 	return exp.MkDir(path)
 }
 
 func (a *App) Delete(connId, path string) error {
-	exp, err := a.getExplorerForConnection(connId)
+	exp, err := a.getConnection(connId)
 	if err != nil {
 		return err
 	}
-	if err := exp.Connect(); err != nil {
-		return err
-	}
-	defer exp.Disconnect()
 	return exp.Delete(path)
 }
 
@@ -225,14 +252,10 @@ func (a *App) ClearTransfers() {
 }
 
 func (a *App) Rename(connId, src, dst string) error {
-	exp, err := a.getExplorerForConnection(connId)
+	exp, err := a.getConnection(connId)
 	if err != nil {
 		return err
 	}
-	if err := exp.Connect(); err != nil {
-		return err
-	}
-	defer exp.Disconnect()
 	return exp.Rename(src, dst)
 }
 

frontend/wailsjs/go/main/App.d.ts

@@ -11,6 +11,8 @@ export function Delete(arg1:string,arg2:string):Promise<void>;
 
 export function DeleteConnection(arg1:string):Promise<void>;
 
+export function DisconnectConnection(arg1:string):Promise<void>;
+
 export function GetConnections():Promise<Array<config.ConnectionConfig>>;
 
 export function GetTransfers():Promise<Array<transfer.Transfer>>;

frontend/wailsjs/go/main/App.js

@@ -14,6 +14,10 @@ export function DeleteConnection(arg1) {
   return window['go']['main']['App']['DeleteConnection'](arg1);
 }
 
+export function DisconnectConnection(arg1) {
+  return window['go']['main']['App']['DisconnectConnection'](arg1);
+}
+
 export function GetConnections() {
   return window['go']['main']['App']['GetConnections']();
 }

internal/protocols/sftp/sftp.go

@@ -9,10 +9,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pkg/sftp"
-	"golang.org/x/crypto/ssh"
 	"goexplore/internal/config"
 	"goexplore/internal/explorer"
+
+	"github.com/pkg/sftp"
+	"golang.org/x/crypto/ssh"
 )
 
 type SFTPExplorer struct {
@@ -102,9 +103,17 @@ func (e *SFTPExplorer) Disconnect() error {
 
 func (e *SFTPExplorer) ListDir(path string) ([]explorer.FileEntry, error) {
 	if path == "" {
-		path = "."
+		if e.cfg.Bucket != "" {
+			path = e.cfg.Bucket
+		} else {
+			path = "/"
 		}
+	} else if path == "." {
+		path = "/"
+	}
+
 	files, err := e.client.ReadDir(path)
+
 	if err != nil {
 		return nil, err
 	}

main.go

@@ -27,6 +27,12 @@ func installLinux() {
 		return
 	}
 
+	for _, arg := range os.Args {
+		if arg == "--debug" {
+			return
+		}
+	}
+
 	exe, err := os.Executable()
 	if err != nil {
 		return