fix: Replace Prawn with Grover for PDF ticket generation
- Replace Prawn PDF generation with Grover (Chrome headless) for better compatibility - Add HTML-based ticket template with embedded CSS styling - Implement robust Grover loading with fallback to HTML download - Add QR code generation methods to Ticket model - Remove legacy TicketPdfGenerator service and tests - Update PDF generation in TicketsController with proper error handling The new implementation provides: - Better HTML/CSS rendering for ticket layouts - More reliable PDF generation using Chrome engine - Fallback mechanism for better user experience - Cleaner separation of template rendering and PDF conversion 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
kbe
141
app/assets/stylesheets/pdf.css
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141
app/assets/stylesheets/pdf.css
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/* PDF Styles for Ticket Generation */
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body {
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font-family: Helvetica, Arial, sans-serif;
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font-size: 12px;
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color: #000000;
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margin: 0;
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padding: 20px;
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background-color: #ffffff;
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}
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.ticket-container {
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max-width: 350px;
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margin: 0 auto;
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padding: 20px;
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border: 1px solid #e5e7eb;
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border-radius: 10px;
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background-color: #ffffff;
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}
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/* Header */
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.header {
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text-align: center;
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margin-bottom: 10px;
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}
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.header h1 {
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color: #2D1B69;
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font-size: 24px;
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font-weight: bold;
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margin: 0;
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}
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/* Event name */
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.event-name {
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text-align: center;
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margin-bottom: 20px;
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}
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.event-name h2 {
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color: #000000;
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font-size: 18px;
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font-weight: bold;
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margin: 0;
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}
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/* Ticket info box */
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.ticket-info-box {
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background-color: #F9FAFB;
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border: 1px solid #E5E7EB;
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border-radius: 10px;
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padding: 15px;
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margin-bottom: 20px;
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}
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.info-row {
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margin-bottom: 8px;
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}
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.info-row:last-child {
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margin-bottom: 0;
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}
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.info-label {
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font-weight: bold;
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color: #000000;
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display: inline-block;
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width: 100px;
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}
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.info-value {
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display: inline-block;
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color: #000000;
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}
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/* Venue information */
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.venue-info {
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margin-bottom: 20px;
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}
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.venue-info h3 {
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color: #374151;
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font-size: 14px;
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font-weight: bold;
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margin: 0 0 8px 0;
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}
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.venue-details {
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font-size: 11px;
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}
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.venue-name {
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font-weight: bold;
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margin-bottom: 4px;
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}
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.venue-address {
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color: #000000;
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}
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/* QR Code */
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.qr-code-section {
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text-align: center;
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margin-bottom: 15px;
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}
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.qr-code-section h3 {
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color: #000000;
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font-size: 14px;
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font-weight: bold;
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margin: 0 0 10px 0;
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}
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.qr-code-container {
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text-align: center;
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margin: 0 auto 10px auto;
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width: 120px;
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height: 120px;
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}
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.qr-code-text {
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font-size: 8px;
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color: #6B7280;
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}
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/* Footer */
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.footer {
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border-top: 1px solid #E5E7EB;
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padding-top: 15px;
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text-align: center;
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font-size: 8px;
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color: #6B7280;
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}
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.footer p {
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margin: 0 0 5px 0;
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}
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.generated-date {
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margin-top: 5px;
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}
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@@ -74,18 +74,89 @@ class TicketsController < ApplicationController
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return
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end
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# Generate PDF
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pdf_content = @ticket.to_pdf
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# Send PDF as download
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send_data pdf_content,
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filename: "ticket_#{@ticket.id}_#{@ticket.event.name.parameterize}.pdf",
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type: "application/pdf",
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disposition: "attachment"
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rescue ActiveRecord::RecordNotFound
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# Generate PDF using Grover
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begin
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Rails.logger.info "Starting PDF generation for ticket ID: #{@ticket.id}"
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# Render the HTML template
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html = render_to_string(
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partial: "tickets/pdf_ticket",
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layout: false,
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locals: { ticket: @ticket }
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)
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Rails.logger.info "HTML template rendered successfully, length: #{html.length}"
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# Try to load and use Grover
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begin
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Rails.logger.info "Attempting to load Grover gem"
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# Try different approaches to load grover
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begin
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require 'bundler'
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Bundler.require(:default, Rails.env)
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Rails.logger.info "Bundler required gems successfully"
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rescue => bundler_error
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Rails.logger.warn "Bundler require failed: #{bundler_error.message}"
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end
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# Direct path approach using bundle show
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grover_gem_path = `bundle show grover`.strip
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grover_path = File.join(grover_gem_path, 'lib', 'grover')
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if File.exist?(grover_path + '.rb')
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Rails.logger.info "Loading Grover from direct path: #{grover_path}"
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require grover_path
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else
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Rails.logger.error "Grover not found at path: #{grover_path}"
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raise LoadError, "Grover gem not available at expected path"
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end
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Rails.logger.info "Creating Grover instance with options"
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grover = Grover.new(html,
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format: 'A6',
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margin: {
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top: '10mm',
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bottom: '10mm',
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left: '10mm',
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right: '10mm'
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},
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prefer_css_page_size: true,
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emulate_media: 'print',
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cache: false,
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launch_args: ['--no-sandbox', '--disable-setuid-sandbox'] # For better compatibility
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)
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Rails.logger.info "Grover instance created successfully"
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pdf_content = grover.to_pdf
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Rails.logger.info "PDF generated successfully, length: #{pdf_content.length}"
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# Send PDF as download
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send_data pdf_content,
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filename: "ticket_#{@ticket.id}_#{@ticket.event.name.parameterize}.pdf",
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type: "application/pdf",
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disposition: "attachment"
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rescue LoadError => grover_error
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Rails.logger.error "Failed to load Grover: #{grover_error.message}"
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# Fallback: return HTML instead of PDF
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send_data html,
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filename: "ticket_#{@ticket.id}_#{@ticket.event.name.parameterize}.html",
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type: "text/html",
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disposition: "attachment"
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end
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rescue => e
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Rails.logger.error "Error generating ticket PDF with Grover:"
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Rails.logger.error "Message: #{e.message}"
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Rails.logger.error "Backtrace: #{e.backtrace.join("\n")}"
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redirect_to dashboard_path, alert: "Erreur lors de la génération du billet"
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end
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rescue ActiveRecord::RecordNotFound => e
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Rails.logger.error "ActiveRecord::RecordNotFound error: #{e.message}"
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redirect_to dashboard_path, alert: "Billet non trouvé"
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rescue => e
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Rails.logger.error "Error generating ticket PDF: #{e.message}"
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Rails.logger.error "Unexpected error in download_ticket action:"
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Rails.logger.error "Message: #{e.message}"
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Rails.logger.error "Backtrace: #{e.backtrace.join("\n")}"
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redirect_to dashboard_path, alert: "Erreur lors de la génération du billet"
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end
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@@ -27,6 +27,29 @@ class Ticket < ApplicationRecord
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TicketPdfGenerator.new(self).generate
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end
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# Generate QR code data for ticket validation
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def to_qr_data
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{
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ticket_id: id,
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qr_code: qr_code,
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event_id: event&.id,
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user_id: user&.id
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}.compact.to_json
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end
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# Generate QR code as SVG
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def generate_qr_svg
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require 'rqrcode'
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qrcode = RQRCode::QRCode.new(to_qr_data)
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qrcode.as_svg(
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offset: 0,
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color: '000',
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shape_rendering: 'crispEdges',
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module_size: 4,
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standalone: true
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)
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end
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# Price in euros (formatted)
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def price_euros
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price_cents / 100.0
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@@ -1,118 +0,0 @@
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require "prawn"
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require "prawn/qrcode"
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require "rqrcode"
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# PDF ticket generator service using Prawn
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#
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# Generates PDF tickets with QR codes for event entry validation
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# Includes event details, venue information, and unique QR code for each ticket
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class TicketPdfGenerator
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# Suppress Prawn's internationalization warning for built-in fonts
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Prawn::Fonts::AFM.hide_m17n_warning = true
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attr_reader :ticket
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def initialize(ticket)
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@ticket = ticket
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end
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def generate
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Prawn::Document.new(page_size: [ 350, 600 ], margin: 20) do |pdf|
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# Header
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pdf.fill_color "2D1B69"
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pdf.font "Helvetica", style: :bold, size: 24
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pdf.text "ApéroNight", align: :center
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pdf.move_down 10
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# Event name
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pdf.fill_color "000000"
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pdf.font "Helvetica", style: :bold, size: 18
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pdf.text ticket.event.name, align: :center
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pdf.move_down 20
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# Ticket info box
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pdf.stroke_color "E5E7EB"
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pdf.fill_color "F9FAFB"
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pdf.rounded_rectangle [ 0, pdf.cursor ], 310, 150, 10
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pdf.fill_and_stroke
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pdf.move_down 10
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pdf.fill_color "000000"
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pdf.font "Helvetica", size: 12
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# Customer name
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pdf.text "Ticket Holder:", style: :bold
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pdf.text "#{ticket.first_name} #{ticket.last_name}"
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pdf.move_down 8
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# Ticket details
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pdf.text "Ticket Type:", style: :bold
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pdf.text ticket.ticket_type.name
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pdf.move_down 8
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pdf.text "Price:", style: :bold
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pdf.text "€#{ticket.price_euros}"
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pdf.move_down 8
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pdf.text "Date & Time:", style: :bold
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pdf.text ticket.event.start_time.strftime("%B %d, %Y at %I:%M %p")
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pdf.move_down 20
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# Venue information
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pdf.fill_color "374151"
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pdf.font "Helvetica", style: :bold, size: 14
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pdf.text "Venue Information"
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pdf.move_down 8
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pdf.font "Helvetica", size: 11
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pdf.text ticket.event.venue_name, style: :bold
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pdf.text ticket.event.venue_address
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pdf.move_down 20
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# QR Code
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pdf.fill_color "000000"
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pdf.font "Helvetica", style: :bold, size: 14
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pdf.text "Ticket QR Code", align: :center
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pdf.move_down 10
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# Ensure all required data is present before generating QR code
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if ticket.qr_code.blank?
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raise "Ticket QR code is missing"
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end
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qr_code_data = {
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ticket_id: ticket.id,
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qr_code: ticket.qr_code,
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event_id: ticket.event&.id,
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user_id: ticket.user&.id
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}.compact.to_json
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# Validate QR code data before creating QR code
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if qr_code_data.blank? || qr_code_data == "{}"
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raise "QR code data is empty or invalid"
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end
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# Generate QR code - prawn-qrcode expects the data string directly
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pdf.print_qr_code(qr_code_data, extent: 120, align: :center)
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pdf.move_down 15
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# QR code text
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pdf.font "Helvetica", size: 8
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pdf.fill_color "6B7280"
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pdf.text "QR Code: #{ticket.qr_code[0..7]}...", align: :center
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# Footer
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pdf.move_down 30
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pdf.stroke_color "E5E7EB"
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pdf.horizontal_line 0, 310
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pdf.move_down 10
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pdf.font "Helvetica", size: 8
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pdf.fill_color "6B7280"
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pdf.text "This ticket is valid for one entry only.", align: :center
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pdf.text "Present this ticket at the venue entrance.", align: :center
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pdf.move_down 5
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pdf.text "Generated on #{Time.current.strftime('%B %d, %Y at %I:%M %p')}", align: :center
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end.render
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end
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end
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11
app/views/layouts/pdf.html.erb
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11
app/views/layouts/pdf.html.erb
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@@ -0,0 +1,11 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title><%= yield :title %></title>
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<%= stylesheet_link_tag "pdf" %>
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</head>
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<body>
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<%= yield %>
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</body>
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</html>
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98
app/views/tickets/_pdf_ticket.html.erb
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98
app/views/tickets/_pdf_ticket.html.erb
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@@ -0,0 +1,98 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Ticket #<%= ticket.id %></title>
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<style>
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body {
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font-family: Helvetica, Arial, sans-serif;
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font-size: 12px;
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color: #000000;
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margin: 0;
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padding: 20px;
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background-color: #ffffff;
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}
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.ticket-container {
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max-width: 350px;
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margin: 0 auto;
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padding: 20px;
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border: 1px solid #e5e7eb;
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border-radius: 10px;
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background-color: #ffffff;
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}
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.header {
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text-align: center;
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margin-bottom: 20px;
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}
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.header h1 {
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color: #2D1B69;
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font-size: 24px;
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font-weight: bold;
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margin: 0;
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}
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.event-name {
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text-align: center;
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margin-bottom: 20px;
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}
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.event-name h2 {
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color: #000000;
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font-size: 18px;
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font-weight: bold;
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margin: 0;
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}
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.ticket-info {
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margin-bottom: 20px;
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}
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.info-row {
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margin-bottom: 8px;
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font-size: 14px;
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}
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.qr-code-section {
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text-align: center;
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margin-top: 20px;
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}
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.qr-code-container svg {
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width: 120px;
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height: 120px;
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}
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</style>
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</head>
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<body>
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<div class="ticket-container">
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<div class="header">
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<h1>ApéroNight</h1>
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</div>
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<div class="event-name">
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<h2><%= ticket.event.name %></h2>
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</div>
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<div class="ticket-info">
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<div class="info-row">
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<strong>Ticket Holder:</strong> <%= ticket.first_name %> <%= ticket.last_name %>
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</div>
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<div class="info-row">
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<strong>Ticket Type:</strong> <%= ticket.ticket_type.name %>
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</div>
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<div class="info-row">
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<strong>Price:</strong> €<%= ticket.price_euros %>
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</div>
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</div>
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<div class="qr-code-section">
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<div class="qr-code-container">
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<%= raw ticket.generate_qr_svg %>
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</div>
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</div>
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</div>
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</body>
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</html>
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14
app/views/tickets/show.pdf.erb
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14
app/views/tickets/show.pdf.erb
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@@ -0,0 +1,14 @@
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<% content_for :title, "Ticket ##{ticket.id}" %>
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<div style="font-family: Arial, sans-serif; max-width: 350px; margin: 20px auto; padding: 20px; border: 1px solid #ccc;">
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<div style="text-align: center;">
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<h1 style="color: #2D1B69;">ApéroNight</h1>
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</div>
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<h2><%= ticket.event.name %></h2>
|
||||
<p>Ticket Holder: <%= ticket.first_name %> <%= ticket.last_name %></p>
|
||||
<p>Ticket Type: <%= ticket.ticket_type.name %></p>
|
||||
<p>Price: €<%= ticket.price_euros %></p>
|
||||
<div style="text-align: center; margin-top: 20px;">
|
||||
<%= raw ticket.generate_qr_svg %>
|
||||
</div>
|
||||
</div>
|
||||
Reference in New Issue
Block a user