# Database Manager Kivy App

A simple Kivy application for managing a MariaDB database with two columns (id and mass) for the `offsystemsCounting` table.

## Features

- **Search**: Look up records by ID
- **Add/Update**: Add new records or update existing ones
- **Delete**: Remove records from the database
- **View All**: Display all records in the database
- **Auto-create**: Table is created automatically if it doesn't exist

## Prerequisites

### MariaDB Server Setup

1. **Install MariaDB server** (if not already installed):
   ```bash
   sudo apt update
   sudo apt install mariadb-server
   ```

2. **Start MariaDB service**:
   ```bash
   sudo systemctl start mariadb
   sudo systemctl enable mariadb
   ```

3. **Secure MariaDB installation**:
   ```bash
   sudo mysql_secure_installation
   ```

4. **Create the database and user**:
   ```bash
   sudo mysql -u root -p
   ```
   
   Then run these SQL commands:
   ```sql
   CREATE DATABASE cantare_injectie;
   CREATE USER 'omron'@'localhost' IDENTIFIED BY 'Initial01!';
   GRANT ALL PRIVILEGES ON cantare_injectie.* TO 'omron'@'localhost';
   FLUSH PRIVILEGES;
   EXIT;
   ```

5. **Test the connection**:
   ```bash
   mysql -u omron -p cantare_injectie
   ```
   Enter password: `Initial01!`

## Installation

1. Install Python 3.7+ if not already installed
2. Install the required dependencies:
   ```bash
   pip install -r requirements.txt
   ```
   Or using virtual environment:
   ```bash
   python3 -m venv venv
   source venv/bin/activate
   pip install -r requirements.txt
   ```

## Usage

1. **Make sure MariaDB server is running**:
   ```bash
   sudo systemctl status mariadb
   ```

2. **Run the application**:
   ```bash
   python main.py
   ```
   Or:
   ```bash
   chmod +x run_app.sh
   ./run_app.sh
   ```

3. **To search for a record:**
   - Enter an ID in the "ID" field (max 20 characters)
   - Click "Search"
   - If found, the mass will be displayed in the "Mass" field

4. **To add or update a record:**
   - Enter both ID and mass value
   - Click "Add/Update"
   - If the ID exists, it will be updated; otherwise, a new record will be created

5. **To delete a record:**
   - Enter the ID to delete
   - Click "Delete"
   - Confirm the deletion in the popup

6. **To refresh the display:**
   - Click "Refresh All" to reload all data from the database

## Database Structure

The app connects to MariaDB database `cantare_injectie` with the following table structure:

```sql
CREATE TABLE offsystemsCounting (
    id VARCHAR(20) PRIMARY KEY,
    mass REAL NOT NULL
)
```

## Files

- `main.py`: Main Kivy application
- `database_manager.py`: MariaDB database operations class
- `requirements.txt`: Python dependencies
- `test_database.py`: Test script for database operations
- `run_app.sh`: Startup script
- `README.md`: This documentation

## Connection Settings

The application connects to MariaDB with these settings:
- **Host**: localhost
- **Database**: cantare_injectie
- **User**: omron
- **Password**: Initial01!
- **Table**: offsystemsCounting

## Troubleshooting

1. **Connection Error 1698**: 
   - Make sure MariaDB is running: `sudo systemctl start mariadb`
   - Verify user exists and has correct password
   - Check database exists: `SHOW DATABASES;`

2. **Access Denied**:
   - Verify user permissions: `SHOW GRANTS FOR 'omron'@'localhost';`
   - Reset password if needed: `ALTER USER 'omron'@'localhost' IDENTIFIED BY 'Initial01!';`

3. **Database/Table doesn't exist**:
   - The application will create the table automatically
   - Make sure the database `cantare_injectie` exists

## Notes

- IDs must be unique and max 20 characters
- Mass values must be valid decimal numbers
- The app includes comprehensive error handling and user feedback
- All database operations use parameterized queries for security