(Added) path checking function.

tui_rsync/models/models.py

@@ -18,6 +18,7 @@
 ################################################################################
 
 from peewee import *
+import os
 
 db = SqliteDatabase('sync.db')
 
@@ -34,6 +35,9 @@ class Path(BaseModel):
     def __repr__(self) -> str:
         return f"Path({self.path})"
 
+    def is_exists(self) -> bool:
+        return os.path.exists(self.path)
+
 class SyncCommand(BaseModel):
     command = CharField()