qr-code_manager/app/routes/api.py

"""
API routes for QR Code Manager
"""

import os
import io
import base64
import uuid
from datetime import datetime
from flask import Blueprint, request, jsonify, send_file, redirect, Response, current_app
from app.utils.auth import login_required
from app.utils.qr_generator import QRCodeGenerator
from app.utils.link_manager import LinkPageManager
from app.utils.data_manager import QRDataManager

bp = Blueprint('api', __name__)

# Initialize managers
qr_generator = QRCodeGenerator()
link_manager = LinkPageManager()
data_manager = QRDataManager()

# Configuration for file uploads - use paths relative to app root
UPLOAD_FOLDER = os.path.join(os.path.dirname(__file__), '..', 'static', 'qr_codes')
LOGOS_FOLDER = os.path.join(os.path.dirname(__file__), '..', 'static', 'logos')
UPLOAD_FOLDER = os.path.abspath(UPLOAD_FOLDER)
LOGOS_FOLDER = os.path.abspath(LOGOS_FOLDER)
os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(LOGOS_FOLDER, exist_ok=True)

@bp.route('/generate', methods=['POST'])
@login_required
def generate_qr():
    """Generate QR code API endpoint"""
    try:
        data = request.json
        
        # Extract QR code content
        qr_type = data.get('type', 'text')
        content = data.get('content', '')
        
        # Process content based on type
        if qr_type == 'url':
            qr_content = content if content.startswith(('http://', 'https://')) else f'https://{content}'
        elif qr_type == 'wifi':
            wifi_data = data.get('wifi', {})
            qr_content = f"WIFI:T:{wifi_data.get('security', 'WPA')};S:{wifi_data.get('ssid', '')};P:{wifi_data.get('password', '')};H:{wifi_data.get('hidden', 'false')};;"
        elif qr_type == 'email':
            email_data = data.get('email', {})
            qr_content = f"mailto:{email_data.get('email', '')}?subject={email_data.get('subject', '')}&body={email_data.get('body', '')}"
        elif qr_type == 'phone':
            qr_content = f"tel:{content}"
        elif qr_type == 'sms':
            sms_data = data.get('sms', {})
            qr_content = f"smsto:{sms_data.get('phone', '')}:{sms_data.get('message', '')}"
        elif qr_type == 'vcard':
            vcard_data = data.get('vcard', {})
            qr_content = f"""BEGIN:VCARD
VERSION:3.0
FN:{vcard_data.get('name', '')}
ORG:{vcard_data.get('organization', '')}
TEL:{vcard_data.get('phone', '')}
EMAIL:{vcard_data.get('email', '')}
URL:{vcard_data.get('website', '')}
END:VCARD"""
        else:  # text
            qr_content = content
        
        # Extract styling options
        settings = {
            'size': data.get('size', 10),
            'border': data.get('border', 4),
            'foreground_color': data.get('foreground_color', '#000000'),
            'background_color': data.get('background_color', '#FFFFFF'),
            'style': data.get('style', 'square')
        }
        
        # Generate QR code
        qr_img = qr_generator.generate_qr_code(qr_content, settings)
        
        # Add logo if provided
        logo_path = data.get('logo_path')
        if logo_path and os.path.exists(logo_path):
            qr_img = qr_generator.add_logo(qr_img, logo_path)
        
        # Convert to base64
        img_buffer = io.BytesIO()
        qr_img.save(img_buffer, format='PNG')
        img_buffer.seek(0)
        img_base64 = base64.b64encode(img_buffer.getvalue()).decode()
        
        # Save QR code record
        qr_id = data_manager.save_qr_record(qr_type, qr_content, settings, img_base64)
        
        # Save image file
        img_path = os.path.join(UPLOAD_FOLDER, f'{qr_id}.png')
        qr_img.save(img_path)
        
        return jsonify({
            'success': True,
            'qr_id': qr_id,
            'image_data': f'data:image/png;base64,{img_base64}',
            'download_url': f'/api/download/{qr_id}'
        })
        
    except Exception as e:
        return jsonify({'success': False, 'error': str(e)}), 500

@bp.route('/download/<qr_id>')
@login_required
def download_qr(qr_id):
    """Download QR code in PNG format"""
    try:
        img_path = os.path.join(UPLOAD_FOLDER, f'{qr_id}.png')
        if os.path.exists(img_path):
            return send_file(img_path, as_attachment=True, download_name=f'qr_code_{qr_id}.png')
        else:
            return jsonify({'error': 'QR code not found'}), 404
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/download/<qr_id>/svg')
@login_required
def download_qr_svg(qr_id):
    """Download QR code in SVG format"""
    try:
        # Get QR code data from database
        qr_data = data_manager.get_qr_code(qr_id)
        if not qr_data:
            return jsonify({'error': 'QR code not found'}), 404
        
        # Regenerate QR code as SVG
        settings = qr_data.get('settings', {})
        content = qr_data.get('content', '')
        
        # Generate SVG QR code
        svg_string = qr_generator.generate_qr_code_svg_string(content, settings)
        
        # Create a response with SVG content
        response = Response(svg_string, mimetype='image/svg+xml')
        response.headers['Content-Disposition'] = f'attachment; filename=qr_code_{qr_id}.svg'
        
        return response
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/qr_codes')
@login_required
def list_qr_codes():
    """List all generated QR codes"""
    return jsonify(data_manager.list_qr_codes())

@bp.route('/qr_codes/<qr_id>')
@login_required
def get_qr_code(qr_id):
    """Get specific QR code details"""
    qr_data = data_manager.get_qr_record(qr_id)
    if qr_data:
        return jsonify(qr_data)
    else:
        return jsonify({'error': 'QR code not found'}), 404

@bp.route('/qr_codes/<qr_id>', methods=['DELETE'])
@login_required
def delete_qr_code(qr_id):
    """Delete QR code"""
    try:
        if data_manager.qr_exists(qr_id):
            # Remove from database
            data_manager.delete_qr_record(qr_id)
            
            # Remove image file
            img_path = os.path.join(UPLOAD_FOLDER, f'{qr_id}.png')
            if os.path.exists(img_path):
                os.remove(img_path)
            
            return jsonify({'success': True})
        else:
            return jsonify({'error': 'QR code not found'}), 404
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/upload_logo', methods=['POST'])
@login_required
def upload_logo():
    """Upload logo for QR code"""
    try:
        if 'logo' not in request.files:
            return jsonify({'error': 'No logo file provided'}), 400
        
        file = request.files['logo']
        if file.filename == '':
            return jsonify({'error': 'No file selected'}), 400
        
        # Save logo
        logo_id = str(uuid.uuid4())
        logo_extension = file.filename.rsplit('.', 1)[1].lower()
        logo_filename = f'{logo_id}.{logo_extension}'
        logo_path = os.path.join(LOGOS_FOLDER, logo_filename)
        file.save(logo_path)
        
        return jsonify({
            'success': True,
            'logo_path': logo_path,
            'logo_id': logo_id
        })
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500

# Dynamic Link Pages API Routes

@bp.route('/create_link_page', methods=['POST'])
@login_required
def create_link_page():
    """Create a new dynamic link page and QR code"""
    try:
        data = request.json
        title = data.get('title', 'My Links')
        description = data.get('description', 'Collection of useful links')
        
        # Create the link page
        page_id = link_manager.create_link_page(title, description)
        
        # Create the original page URL
        original_page_url = f"{request.url_root}links/{page_id}"
        
        # Automatically create a short URL for the link page
        short_result = link_manager.create_standalone_short_url(
            original_page_url, 
            title=f"Link Page: {title}",
            custom_code=None
        )
        short_page_url = short_result['short_url']
        
        # Store the short URL info with the page
        link_manager.set_page_short_url(page_id, short_page_url, short_result['short_code'])
        
        settings = {
            'size': data.get('size', 10),
            'border': data.get('border', 4),
            'foreground_color': data.get('foreground_color', '#000000'),
            'background_color': data.get('background_color', '#FFFFFF'),
            'style': data.get('style', 'square')
        }
        
        # Generate QR code pointing to the SHORT URL (not the original long URL)
        qr_img = qr_generator.generate_qr_code(short_page_url, settings)
        
        # Convert to base64
        img_buffer = io.BytesIO()
        qr_img.save(img_buffer, format='PNG')
        img_buffer.seek(0)
        img_base64 = base64.b64encode(img_buffer.getvalue()).decode()
        
        # Save QR code record with the short URL
        qr_id = data_manager.save_qr_record('link_page', short_page_url, settings, img_base64, page_id)
        
        # Save image file
        img_path = os.path.join(UPLOAD_FOLDER, f'{qr_id}.png')
        qr_img.save(img_path)
        
        return jsonify({
            'success': True,
            'qr_id': qr_id,
            'page_id': page_id,
            'page_url': short_page_url,  # Return the short URL as the main page URL
            'original_url': original_page_url,  # Keep original for reference
            'short_code': short_result['short_code'],
            'edit_url': f"{request.url_root}edit/{page_id}",
            'image_data': f'data:image/png;base64,{img_base64}',
            'download_url': f'/api/download/{qr_id}'
        })
        
    except Exception as e:
        return jsonify({'success': False, 'error': str(e)}), 500

@bp.route('/link_pages/<page_id>/links', methods=['POST'])
@login_required
def add_link_to_page(page_id):
    """Add a link to a page"""
    try:
        data = request.json
        title = data.get('title', '')
        url = data.get('url', '')
        description = data.get('description', '')
        enable_shortener = data.get('enable_shortener', False)
        custom_short_code = data.get('custom_short_code', None)
        
        if not title or not url:
            return jsonify({'error': 'Title and URL are required'}), 400
        
        success = link_manager.add_link(
            page_id, title, url, description, 
            enable_shortener=enable_shortener, 
            custom_short_code=custom_short_code
        )
        
        if success:
            return jsonify({'success': True})
        else:
            return jsonify({'error': 'Page not found'}), 404
            
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/link_pages/<page_id>/links/<link_id>', methods=['PUT'])
@login_required
def update_link_in_page(page_id, link_id):
    """Update a link in a page"""
    try:
        data = request.json
        title = data.get('title')
        url = data.get('url')
        description = data.get('description')
        enable_shortener = data.get('enable_shortener')
        custom_short_code = data.get('custom_short_code')
        
        success = link_manager.update_link(
            page_id, link_id, title, url, description, 
            enable_shortener=enable_shortener, 
            custom_short_code=custom_short_code
        )
        
        if success:
            return jsonify({'success': True})
        else:
            return jsonify({'error': 'Page or link not found'}), 404
            
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/link_pages/<page_id>/links/<link_id>', methods=['DELETE'])
@login_required
def delete_link_from_page(page_id, link_id):
    """Delete a link from a page"""
    try:
        success = link_manager.delete_link(page_id, link_id)
        
        if success:
            return jsonify({'success': True})
        else:
            return jsonify({'error': 'Page or link not found'}), 404
            
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/link_pages/<page_id>')
@login_required
def get_link_page(page_id):
    """Get link page data"""
    page_data = link_manager.get_page(page_id)
    if page_data:
        return jsonify(page_data)
    else:
        return jsonify({'error': 'Page not found'}), 404

# URL Shortener API Routes

@bp.route('/shorten', methods=['POST'])
@login_required
def create_short_url():
    """Create a shortened URL"""
    try:
        data = request.json
        url = data.get('url', '')
        title = data.get('title', '')
        custom_code = data.get('custom_code', None)
        
        if not url:
            return jsonify({'error': 'URL is required'}), 400
        
        result = link_manager.create_standalone_short_url(url, title, custom_code)
        
        return jsonify({
            'success': True,
            'short_url': result['short_url'],
            'short_code': result['short_code'],
            'original_url': result['original_url']
        })
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/short_urls')
@login_required
def list_short_urls():
    """List all shortened URLs"""
    try:
        urls = link_manager.list_all_short_urls()
        return jsonify({'success': True, 'urls': urls})
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/short_urls/<short_code>/stats')
@login_required
def get_short_url_stats(short_code):
    """Get statistics for a short URL"""
    try:
        stats = link_manager.get_short_url_stats(short_code)
        if stats:
            return jsonify({'success': True, 'stats': stats})
        else:
            return jsonify({'error': 'Short URL not found'}), 404
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@bp.route('/generate_shortened_qr', methods=['POST'])
@login_required
def generate_shortened_qr():
    """Generate QR code for a shortened URL"""
    try:
        data = request.json
        shortener_data = data.get('shortener', {})
        url = shortener_data.get('url', '')
        title = shortener_data.get('title', '')
        custom_code = shortener_data.get('custom_code', '').strip() or None
        
        if not url:
            return jsonify({'error': 'URL is required'}), 400
        
        # Create shortened URL
        result = link_manager.create_standalone_short_url(url, title, custom_code)
        short_url = result['short_url']
        
        # Generate QR code for the short URL
        settings = {
            'size': data.get('size', 10),
            'border': data.get('border', 4),
            'foreground_color': data.get('foreground_color', '#000000'),
            'background_color': data.get('background_color', '#FFFFFF'),
            'style': data.get('style', 'square')
        }
        
        qr_img = qr_generator.generate_qr_code(short_url, settings)
        
        # Convert to base64
        img_buffer = io.BytesIO()
        qr_img.save(img_buffer, format='PNG')
        img_buffer.seek(0)
        img_base64 = base64.b64encode(img_buffer.getvalue()).decode()
        
        # Save QR code record
        qr_id = data_manager.save_qr_record('url_shortener', short_url, settings, img_base64)
        
        # Save image file
        img_path = os.path.join(UPLOAD_FOLDER, f'{qr_id}.png')
        qr_img.save(img_path)
        
        return jsonify({
            'success': True,
            'qr_id': qr_id,
            'short_url': short_url,
            'short_code': result['short_code'],
            'original_url': result['original_url'],
            'image_data': f'data:image/png;base64,{img_base64}',
            'download_url': f'/api/download/{qr_id}'
        })
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500