# PDF Rename Sort

A Python web application built with Flask that automatically renames PDF files based on form field data extracted from within the PDFs. Designed for batch processing of fillable PDFs, extracting "Last Name" and "First Name" to create standardized filenames.

## Features

- **Web-Based Interface**: Clean, responsive web UI for easy file uploads
- **Batch Processing**: Handle multiple PDFs or ZIP archives containing PDFs
- **Form Field Extraction**: Uses PyPDF2 to read PDF form fields
- **Intelligent Renaming**: Renames files to "LastName_FirstName.pdf" format
- **Duplicate Handling**: Automatically appends counters for duplicate names
- **ZIP Support**: Upload ZIP files and download processed results as ZIP
- **Job Management**: Background processing with job status tracking and history
- **Authentication**: Microsoft Entra ID and local admin login support
- **Error Handling**: Gracefully skips files that can't be processed

## Prerequisites

- Python 3.6 or higher
- Virtual environment (recommended)
- Microsoft Entra ID (Azure AD) tenant with app registration

## Microsoft Entra ID Setup

**Detailed setup instructions**: See [ENTRA_SETUP.md](ENTRA_SETUP.md) for comprehensive step-by-step guide to configure Microsoft Entra ID authentication.

### Quick Setup:
1. Register application in Azure Portal (optional for admin login)
2. Get Tenant ID, Client ID, and Client Secret (for Entra login)
3. Set environment variables:
   ```bash
   # For Entra ID login (optional)
   export TENANT_ID="your-tenant-id"
   export CLIENT_ID="your-client-id"
   export CLIENT_SECRET="your-client-secret"
   
   # For admin login
   export ADMIN_USERNAME="trbcit"
   export ADMIN_PASSWORD="atdrmbicn"
   
   # Required
   export SECRET_KEY="your-random-secret-key"
   ```

## Authentication

The application supports two authentication methods:

1. **Microsoft Entra ID**: OAuth2 authentication with Azure AD
2. **Admin Login**: Local username/password authentication

Users can choose their preferred login method on the login page.

## Installation

1. **Clone the repository**:
   ```bash
   git clone https://gitlab.com/trbc-dev/pdf-rename-sort.git
   cd pdf-rename-sort
   ```

2. **Create and activate virtual environment**:
   ```bash
   python -m venv .venv
   # On Windows:
   & .venv/Scripts/Activate.ps1
   # On macOS/Linux:
   source .venv/bin/activate
   ```

3. **Install dependencies**:
   ```bash
   pip install -r requirements.txt
   ```

## Usage

1. **Set environment variables** (see Entra ID Setup above)

2. **Run the application**:
   ```bash
   python pdf_renamer.py
   ```

3. **Access the web interface**:
   - Open `http://127.0.0.1:3000/`
   - Authenticate using Microsoft Entra ID or admin login

4. **Upload files**:
   - Select individual PDF files or ZIP archives containing PDFs
   - Click "Process PDFs" - this creates a background job

5. **Monitor jobs**:
   - Click "View Jobs" to see processing status and history
   - Jobs show as "Queued", "Processing", or "Completed"

6. **Download results**:
   - When complete, download the ZIP file from the jobs page
   - Review any skipped files listed for each job

## How It Works

1. **File Upload**: Accepts PDFs or ZIPs via web form
2. **Extraction**: If ZIP, extracts PDFs to temporary directory
3. **Processing**: For each PDF, reads form fields using PyPDF2
4. **Renaming**: Extracts "Last Name" and "First Name" values
5. **Packaging**: Creates a ZIP archive of renamed PDFs
6. **Download**: Provides secure download link for results

## Important Notes

- PDFs must contain fillable form fields named exactly "Last Name" and "First Name"
- Files without these fields or with extraction errors will be skipped
- All processing happens server-side with temporary file storage
- Maximum upload size is limited to 100MB

## Development

To contribute or modify:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

## License

This project is licensed under the MIT License - see the LICENSE file for details.

## Support

For issues or questions, please open an issue on the GitLab repository.