🗂️ Task Manager

A command-line task manager built with Python. Tasks are stored in mytasks.json and managed through a simple chatbot-style interface.

🚀 Features

• 📂 Persistent JSON storage
• 👤 Personalized greeting using the user's name
• 🤖 Natural-language style commands such as add, show, done, and delete
• 📝 Task fields for ID, description, status, due date, and priority
• 📋 Filters for all, completed, pending, and overdue tasks
• 💾 Auto-save after add, update, and delete actions

🧰 Requirements

• Python 3.10+
• dateparser
• Works on Windows, macOS, and Linux

📦 Installation

Install dependencies:

pip install -r requirements.txt

▶️ Run

Start the app with:

python main.py

You will be prompted for your name, then the app loads mytasks.json. If the file does not exist, it is created automatically.

📁 Project Files

• main.py - entry point and interactive loop
• task_manager.py - task storage and task operations
• chatbot.py - regex-based command parsing
• util.py - due date calculations
• mytasks.json - persisted task data

🤖 Chatbot Commands

The chatbot recognizes intent from text, not only fixed commands.

• 👋 Greeting: hi, hello, hey
• ➕ Add task: messages containing add or new
• 📋 Show tasks: show, display
• ✅ Mark complete: mark, complete, done with a task number
• 🗑️ Delete task: delete, remove, erase, cancel with a task number
• 👋 Exit: exit, quit, bye, end

➕ Add Task Format

Adding a task currently requires:

• 📝 A task description
• 📅 A due date the parser can understand
• 🏷️ An optional priority: high, medium, low, or normal
• 🔢 An optional task ID; otherwise the app assigns the next number

Examples:

add finish report due tomorrow high
add buy groceries by 2026-03-15 low
add submit assignment id 7 due today medium

If no due date is provided, the task will not be added.

📋 Display Filters

The app supports these display modes through chatbot input:

• show or display - all tasks
• show completed - completed tasks
• show pending - pending tasks
• show overdue - overdue tasks
• show menu - menu output

💬 Demo Conversation

The chatbot uses random reply variants for greetings, add, delete, mark-complete, and error messages, so the exact wording may differ. The conversation below is a realistic sample based on the current code.

Program: 👤 Enter your name: Kedar
Program: 📂 Task data loaded successfully!

Program: ✨ Welcome Kedar to the TO-DO Assistant ✨

You: hello
Bot: Welcome back Kedar! ✨

You: show
Bot: 💭 No tasks available. Add one!

You: show menu
Bot: 💭 No tasks available. Add one!

You: add finish python assignment
Bot: ⚠️ Please enter valid date!

You: add finish python assignment due tomorrow high
Bot: 🚀 Task added successfully!

You: add buy groceries by 2026-03-15 low
Bot: Your task has been added!

You: add renew passport id 7 due 2025-01-01 medium
Bot: Done! Task saved successfully.

You: show
Bot:
 📋 Your Task List
 ------------------------------------------------------------------------------------------
 Task  Description                   Priority        Status              Due Time
 ------------------------------------------------------------------------------------------
 1     finish python assignment      🔴              ⏳ Pending           0d 12h 0m left
 ------------------------------------------------------------------------------------------
 2     buy groceries                 🟢              ⏳ Pending           4d 6h 0m left
 ------------------------------------------------------------------------------------------
 7     renew passport                🟡              ❌ Overdue           -
 ------------------------------------------------------------------------------------------

You: show pending
Bot:
 📋 Your Task List
 ------------------------------------------------------------------------------------------
 Task  Description                   Priority        Status              Due Time
 ------------------------------------------------------------------------------------------
 1     finish python assignment      🔴              ⏳ Pending           0d 12h 0m left
 ------------------------------------------------------------------------------------------
 2     buy groceries                 🟢              ⏳ Pending           4d 6h 0m left
 ------------------------------------------------------------------------------------------
 7     renew passport                🟡              ❌ Overdue           -
 ------------------------------------------------------------------------------------------

You: show overdue
Bot:
 📋 Your Task List
 ------------------------------------------------------------------------------------------
 Task  Description                   Priority        Status              Due Time
 ------------------------------------------------------------------------------------------
 7     renew passport                🟡              ❌ Overdue           -
 ------------------------------------------------------------------------------------------

You: done 2
Bot: Task successfully completed.

You: show completed
Bot:
 📋 Your Task List
 ------------------------------------------------------------------------------------------
 Task  Description                   Priority        Status              Due Time
 ------------------------------------------------------------------------------------------
 2     buy groceries                 🟢              ✅ Done              -
 ------------------------------------------------------------------------------------------

You: done 1 7
Bot: I've marked that task as finished.
Bot: Task successfully completed.

You: show completed
Bot:
 📋 Your Task List
 ------------------------------------------------------------------------------------------
 Task  Description                   Priority        Status              Due Time
 ------------------------------------------------------------------------------------------
 1     finish python assignment      🔴              ✅ Done              -
 ------------------------------------------------------------------------------------------
 2     buy groceries                 🟢              ✅ Done              -
 ------------------------------------------------------------------------------------------
 7     renew passport                🟡              ✅ Done           -
 ------------------------------------------------------------------------------------------

You: show menu
Bot:
 📌 [MENU]
 +----------------------------+
 | 1️⃣  Add a new task         |
 | 2️⃣  Display all tasks      |
 | 3️⃣  Mark task completed    |
 | 4️⃣  Delete task            |
 | 5️⃣  Exit program           |
 +----------------------------+

You: remove 7
Bot: Task removed successfully. 🗑️

You: tell me a joke
Bot: Sorry, I didn't understand that. 🤔

You: quit
Program: 💾 Task list updated successfully!
Program: 👋 Goodbye Kedar!

Notes about the current behavior:

• show menu only displays the menu when at least one task already exists.
• show pending also includes overdue tasks, because overdue tasks still have Status = false.
• The exact remaining-time text changes based on the current date and time.

📁 JSON Structure

Tasks are stored like this: You: delete 1 2 Bot: Deleted! Your list looks cleaner now. Alright, that task is deleted.

You: show Bot: 💭 No tasks available. Add one!

{
  "tasks": [
    {
      "Task_No": 1,
      "Description": "Buy groceries",
      "Status": false,
      "Due_Date": "2026-03-15 18:00",
      "Priority": "symbol for selected priority"
    }
  ]
}

🛠️ Implementation Notes

• The application stores priority internally as a symbol, even though the user types high, medium, low, or normal.
• Overdue and remaining time are calculated when tasks are displayed.
• done 1 7 and delete 1 2 work because the chatbot extracts every number in the message and applies the action to each one.
• You can delete or mark multiple tasks.
• Some console text in the current source files shows encoding issues on some terminals, but the core functionality still runs.

🧠 What This Project Demonstrates

1. Object-oriented Python design
2. JSON file handling
3. Input parsing with regular expressions
4. Basic validation and persistence
5. CLI-based task management