Add crud_operation

Author: Wilondja243

crud_operation/.gitignore

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crud_operation/LICENSE

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+MIT License
+
+Copyright (c) 2025 Luckson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

crud_operation/README.md

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+# User Management System (CLI)
+
+A lightweight **Command Line Interface (CLI)** application built with Python to manage user records using **CRUD** (Create, Read, Update, Delete) operations. This project features a dynamic typewriter effect with ANSI color support for enhanced user experience.
+
+---
+
+## 🚀 Features
+
+* **Full CRUD Operations:** View, Add, Update, and Delete users.
+* **Dynamic UI:** Includes a "typewriter" animation effect for console output.
+* **Color-Coded Feedback:**
+    * 🟢 **Green:** Success messages.
+    * 🔴 **Red:** Error messages and exit alerts.
+* **Input Validation:** Ensures only numeric inputs are processed for actions.
+* **Error Handling:** Robust `try-except` blocks to prevent crashes during runtime.
+
+---
+
+## 🛠️ Project Structure
+
+```text
+├── main.py              # Entry point of the application
+├── crud/
+│   └── views.py         # User model and view logic
+└── services/
+    └── action.py        # Logic mapping inputs to CRUD functions
+
+```
+
+---
+
+## 💻 Installation & Usage
+
+1. **Clone the repository:**
+```bash
+git clone [https://github.com/yourusername/user-management-python.git](https://github.com/yourusername/user-management-python.git)
+cd user-management-python
+
+```
+
+
+2. **Run the application:**
+```bash
+python main.py
+
+```
+
+## 📖 Menu Options
+
+Upon launching, select an option by typing the corresponding number:
+
+| Option | Action | Description |
+| --- | --- | --- |
+| **1** | **Show users list** | Displays all registered users. |
+| **2** | **Add user** | Opens a prompt to create a new user profile. |
+| **3** | **Update user** | Modifies existing user details. |
+| **4** | **Delete user** | Removes a user from the system. |
+| **5** | **Quit** | Safely closes the application. |
+
+---
+
+## ⚙️ Technical Highlights
+
+### Visual Effects
+
+The system uses the `sys.stdout` buffer to print characters one by one for a typewriter effect, combined with **ANSI escape codes** for coloring:
+
+* **Green (`\033[92m`)**: Used for successful operations.
+* **Red (`\033[91m`)**: Used for errors and exit messages.
+
+### Logic Flow
+
+The program verifies that the input is a digit before processing, preventing common input errors.
+
+```python
+if action.isdigit():
+    actions(action, User)
+else:
+    print("Enter the action number.")
+
+```
+
+---
+
+## 📝 License
+
+This project is open-source and available under the **MIT License**.

crud_operation/crud/__init__.py

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+import sqlite3
+
+def db_connection():
+    con = sqlite3.connect("db/users.db")
+    cursor = con.cursor()
+
+    return con, cursor

crud_operation/crud/db.py

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+from crud.db import db_connection
+
+class Model:
+    def user(self):
+        con, cursor = db_connection()
+
+        cursor.execute(
+            """
+                CREATE TABLE IF NOT EXISTS Users(
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    first_name TEXT NOT NULL,
+                    last_name TEXT NOT NULL,
+                    age INTEGER NOT NULL,
+                    email TEXT NOT NULL,
+                    UNIQUE(email)
+                )
+            """
+        )
+
+        con.commit()