Dan is an interactive text-based desktop todo list app for managing tasks, optimized for use via a Command Line Interface (CLI) Never forget another task again with Dan 👻 👻 👻!

• Words in UPPER_CASE are the parameters to be supplied by the user, e.g. in todo TODO_NAME, TODO_NAME is a parameter which can be used as todo clean room.
• Commands enclosed in square brackets [INPUT] are optional arguments that can be entered by the user, separated by spaces.
• dd/MM/yyyy HHmm refers to the standard date-time format, e.g. 31/12/2022 1900. Invalid dates or dates that are not in this format won't be accepted.
• If parameters are specified for commands that do not take in parameters, the input will be rejected and error message will be shown.

• list
• todo TODO_NAME
• deadline DEADLINE_NAME /by dd/MM/yyyy HHmm
• event EVENT_NAME /at dd/MM/yyyy HHmm
• mark TASK_NUMBER [TASK_NUMBERS]
• unmark TASK_NUMBER [TASK_NUMBERS]
• delete TASK_NUMBER [TASK_NUMBERS]
• find KEYWORD [KEYWORDS]
• help
• bye

Adds a todo task to Dan the ghost.

Format: todo TODO_NAME

Examples:

• todo Clean my room
• todo study for midterms

Adds a deadline task to Dan the ghost.

Format: deadline DEADLINE_NAME /by dd/MM/yyyy HHmm

• An error will be shown if the input satisfies one of the three conditions below
  • " /by " separator is not found
  • Datetime is not valid
  • Datetime is not in format dd/MM/yyyy HHmm

Examples:

• deadline Submit iP /by 16/09/2022 2359
• deadline complete cs3243 project 1 /by 18/09/2022 2359

Adds an event task to Dan the ghost.

Format: event EVENT_NAME /at dd/MM/yyyy HHmm

• An error will be shown if the input satisfies one of the three conditions below
  • " /at " separator is not found
  • Datetime is not valid
  • Datetime is not in format dd/MM/yyyy HHmm

Examples:

• event birthday party /at 18/09/2022 2000
• event definitely an event /at 31/12/2022 0000

Shows a list of all tasks Dan the ghost is playing with.

Format: list

• An error will be shown if the command is followed by parameters

Marks a task stored with Dan the ghost as completed.

Format: mark TASK_NUMBER [TASK_NUMBERS]

• An error will be shown if TASK_NUMBER satisfies one of the three conditions below
  • Not an integer
  • Non-positive number
  • Exceeds the number of tasks with Dan the ghost

Examples:

• mark 1
• mark 8
• mark 10 12 3 1

Marks a task stored with Dan the ghost as not completed.

Format: unmark TASK_NUMBER [TASK_NUMBERS]

• An error will be shown if TASK_NUMBER satisfies one of the three conditions below
  • Not an integer
  • Non-positive number
  • Exceeds the number of tasks with Dan the ghost

Examples:

• unmark 1
• unmark 8
• unmark 10 12 3 1

Deletes a task stored with Dan the ghost.

Format: delete TASK_NUMBER [TASK_NUMBERS]

• An error will be shown if TASK_NUMBER satisfies one of the three conditions below
  • Not an integer
  • Non-positive number
  • Exceeds the number of tasks with Dan the ghost

Examples:

• delete 1
• delete 8
• delete 10 12 3 1

Finds a task stored with Dan the ghost. Task with matching and partially matching descriptions will be shown. Regular expressions can be used as well. Refer to this regex documentation page for more details

Format: find KEYWORD [KEYWORDS]

Examples:

• find clean
• find cle exam mid final
• find [bp]ear \d [a-zA-Z]

Ghost-busts Dan the ghost. Guess we will see him another time ♫ ☺ ♫

Format: bye

• An error will be shown if the command is followed by parameters