Add base support for internalizing the SFTP server

sftp/server.go

@@ -0,0 +1,30 @@
+package sftp
+
+import (
+	"github.com/patrickmn/go-cache"
+	sftpserver "github.com/pterodactyl/sftp-server/src/server"
+	"github.com/pterodactyl/wings/config"
+	"path"
+	"time"
+)
+
+func Initialize(config *config.Configuration) error {
+	c := sftpserver.Configuration{
+		Data:  []byte("{}"),
+		Cache: cache.New(5*time.Minute, 10*time.Minute),
+		User: sftpserver.SftpUser{
+			Uid: config.System.User.Uid,
+			Gid: config.System.User.Gid,
+		},
+		Settings: sftpserver.Settings{
+			BasePath:         config.System.Data,
+			ReadOnly:         config.System.Sftp.ReadOnly,
+			BindAddress:      config.System.Sftp.Address,
+			BindPort:         config.System.Sftp.Port,
+			ServerDataFolder: path.Join(config.System.Data, "/servers"),
+			DisableDiskCheck: config.System.Sftp.DisableDiskChecking,
+		},
+	}
+
+	return c.Initalize()
+}