Fix startup bug and prefix bug

codupoc/todo.py

@@ -1,11 +1,20 @@
+import random
+
 from base64_random import gen_random_base64
 
+ALPH = 'abcdefghijklmnopqrstuvwxyABCDEFGHIJKLMNOPQRSTUVWXY'
+
+def gen_safe_lid() -> str:
+    main_part = gen_random_base64(10)
+    prefix = random.choice(ALPH)
+    return prefix + main_part
+
 
 class Todo:
     def __init__(self, item: str, checked: bool):
         self.item = item
         self.checked = checked
-        self.lid = gen_random_base64(10)
+        self.lid = gen_safe_lid()
 
     def __str__(self):
         checkmark = "X" if self.checked else " "

codupoc/todomanager.py

@@ -13,8 +13,8 @@ class TodoManager:
     def does_todo_file_exist(self):
         return path.exists(self.filename)
 
-    def open_todo_file(self):
+    def open_todo_file(self, filemode="r+"):
-        self.file = open(self.filename, "r+")
+        self.file = open(self.filename, filemode)
         return self.file
 
     def read_todos(self) -> list[Todo]:
@@ -33,7 +33,7 @@ class TodoManager:
 
     def get_todos(self) -> dict[str, Todo]:
         if not self.does_todo_file_exist():
-            self.open_todo_file()
+            self.open_todo_file(filemode="w")
             return {}
 
         todos = self.read_todos()