Implement todos functionality

Author: Sahil

todo_cli/app.py

@@ -46,7 +46,8 @@ def main():
       else:
         print('Successfuly chosen this list...')
         current_list = file_name
-    elif (command[0] == 'todo'):
+    elif (command.split()[0] == 'todo'):
+      # todo type of command
       command_args.insert(0, current_list)
       commands_dict[command_name](command_args)
     else:

todo_cli/commands/todos.py

@@ -1,22 +1,112 @@
+import json
+from datetime import datetime
+
 def set_list(list_name):
   if (list_name == ''):
     print('Please select a given list before this action')
-    return
+  return list_name
+
+def get_data(list_file_name):
+  """
+  Get the deserialized data from the todo list json file
+  """
+  with open(f'lists/{list_file_name}', 'r') as json_file:
+    data = json.load(json_file)
+  return data
+
+def update_data(list_file_name, new_data):
+  """
+  Update the content of the todo list json file
+  with the serialized version of 'new_data'
+  """
+  with open(f'lists/{list_file_name}', 'w') as json_file:
+    json.dump(new_data, json_file, sort_keys=True, indent=True)
 
 def add_item(args):
-  set_list(args[0])
+  """
+  Adds a todo item to the todo list
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  title = args[1]
+  data = get_data(list_name)
+  new_todo = {
+    'title': title,
+    'created_at': datetime.now().strftime("%d/%m/%Y %H:%M:%S"),
+    'completed': False
+  }
+  data.append(new_todo)
+  update_data(list_name, data)
 
 def show_items(args):
-  set_list(args[0])
+  """
+  Prints all the todo items in the currently chosen todo list
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  data = get_data(list_name)
+  complete = 0
+  if (len(data) == 0):
+    print('No todos in the list, why dont you add one?')
+  else:
+    for index, todo_item in enumerate(data):
+      print(index + 1, todo_item['title'])
+      if (todo_item['completed']):
+        complete += 1
+    print(f'{complete}/{len(data)} completed!')
 
 def edit_item(args):
-  set_list(args[0])
+  """
+  Edit a particular todo item
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  item_id = int(args[1])
+  new_title = args[2]
+  data = get_data(list_name)
+  updated_todo = {
+    'title': new_title,
+    'created_at': datetime.now().strftime("%d/%m/%Y %H:%M:%S"),
+    'completed': False
+  }
+  data[item_id - 1] = updated_todo
+  update_data(list_name, data)
 
 def remove_item(args):
-  set_list(args[0])
+  """
+  Remove a todo item
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  item_id = int(args[1])
+  data = get_data(list_name)
+  data.pop(item_id - 1)
+  update_data(list_name, data)
 
 def complete_item(args):
-  set_list(args[0])
+  """
+  Mark a todo item as completed
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  item_id = int(args[1])
+  data = get_data(list_name)
+  data[item_id - 1]['completed'] = True
+  update_data(list_name, data)
 
 def incomplete_item(args):
-  set_list(args[0])
+  """
+  Mark a todo item as incomplete
+  """
+  list_name = set_list(args[0])
+  if (not list_name):
+    return
+  item_id = int(args[1])
+  data = get_data(list_name)
+  data[item_id - 1]['completed'] = False
+  update_data(list_name, data)