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<?php |
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/** |
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* PDF Receipt Generator. |
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* |
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* Generates PDF donation receipts using the mPDF library. |
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* |
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* @package SureDonation |
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*/ |
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|
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namespace SureDonation\Inc\Pdf; |
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|
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use SureDonation\Inc\Database\Tables\Donations; |
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use SureDonation\Inc\Database\Tables\Donors; |
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use SureDonation\Inc\Helper; |
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|
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// Exit if accessed directly. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Receipt_Generator class. |
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* |
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* @since 1.0.0 |
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*/ |
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class Receipt_Generator { |
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/** |
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* Get an existing receipt PDF or generate a new one. |
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* |
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* @param int $donation_id Donation ID. |
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* @return string|false File path on success, false on failure. |
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* @since 1.0.0 |
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*/ |
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public static function get_or_generate( $donation_id ) { |
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$donation = Donations::get( $donation_id ); |
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|
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if ( ! $donation ) { |
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return false; |
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} |
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|
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// Check if a cached PDF exists. |
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$existing_relative = $donation['receipt_pdf_url'] ?? ''; |
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|
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if ( ! empty( $existing_relative ) ) { |
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$existing_path = self::relative_to_path( Helper::get_string_value( $existing_relative ) ); |
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|
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if ( $existing_path && file_exists( $existing_path ) ) { |
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return $existing_path; |
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} |
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} |
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|
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return self::generate( $donation_id ); |
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} |
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|
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/** |
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* Generate a PDF receipt for a donation. |
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* |
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* @param int $donation_id Donation ID. |
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* @return string|false File path on success, false on failure. |
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* @since 1.0.0 |
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*/ |
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public static function generate( $donation_id ) { |
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if ( ! Pdf_Utils::check_if_library_exists() || ! Pdf_Utils::is_php_compatible() ) { |
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return false; |
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} |
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|
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// Load the mPDF autoloader. |
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require_once Pdf_Utils::get_library_path() . '/vendor/autoload.php'; |
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|
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$donation = Donations::get( $donation_id ); |
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|
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if ( ! $donation ) { |
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return false; |
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} |
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|
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$donor_id = Helper::get_integer_value( $donation['donor_id'] ?? 0 ); |
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$donor = $donor_id ? Donors::get( $donor_id ) : null; |
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|
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$campaign_id = Helper::get_integer_value( $donation['campaign_id'] ?? 0 ); |
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$campaign_title = $campaign_id ? (string) get_the_title( $campaign_id ) : ''; |
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|
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// Build the receipt HTML. |
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$html = self::build_receipt_html( $donation, $donor, $campaign_title ); |
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|
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/** |
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* Filter the receipt HTML before PDF generation. |
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* |
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* SECURITY NOTE: The returned HTML is passed directly to mPDF's WriteHTML(). |
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* mPDF can process <img> tags with file:// URIs and load external resources. |
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* Ensure any modifications only use trusted, escaped content. |
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* |
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* @param string $html Receipt HTML. |
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* @param array $donation Donation data. |
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* @param array|null $donor Donor data. |
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* @since 1.0.0 |
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*/ |
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$html = apply_filters( 'suredonation_receipt_html', $html, $donation, $donor ); |
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|
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// Ensure receipts directory exists. |
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Pdf_Utils::ensure_receipts_dir(); |
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|
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$receipts_dir = Pdf_Utils::get_receipts_dir(); |
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$filename = sprintf( 'suredonation-receipt-%d-%s.pdf', $donation_id, wp_generate_password( 8, false ) ); |
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$filepath = $receipts_dir . '/' . $filename; |
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|
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try { |
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$mpdf = new \Mpdf\Mpdf( self::get_mpdf_config() ); |
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$mpdf->WriteHTML( $html ); |
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$mpdf->Output( $filepath, \Mpdf\Output\Destination::FILE ); |
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} catch ( \Exception $e ) { |
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return false; |
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} |
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|
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// Store the relative path in the donation record (portable across domain changes). |
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$upload_dir = wp_upload_dir(); |
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$relative_path = str_replace( $upload_dir['basedir'] . '/', '', $filepath ); |
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Donations::update( $donation_id, [ 'receipt_pdf_url' => $relative_path ] ); |
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|
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return $filepath; |
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} |
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|
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/** |
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* Get the mPDF configuration. |
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* |
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* @return array<string,mixed> |
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* @since 1.0.0 |
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*/ |
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private static function get_mpdf_config() { |
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return [ |
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'mode' => 'utf-8', |
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'format' => 'A4', |
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'orientation' => 'P', |
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'margin_left' => 15, |
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'margin_right' => 15, |
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'margin_top' => 15, |
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'margin_bottom' => 15, |
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'default_font' => 'dejavusans', |
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'tempDir' => Pdf_Utils::get_temp_dir(), |
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// mPDF defaults allow <img src="file:///..."> and remote http(s) |
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// resource fetching. The receipt HTML is server-templated with |
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// escaped fields, but the suredonation_receipt_html filter (and |
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// any future ucfirst-only gateway label) would still surface |
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// donor / gateway data into HTML that mPDF processes. Disable |
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// the dangerous resource-loading defaults so a malicious string |
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// in any rendered field can't become SSRF (remote fetch) or |
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// LFI (local file read into the PDF) regardless of the source. |
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'allow_remote_dir_in_links_filesystem' => false, |
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'curlAllowUnsafeSslRequests' => false, |
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]; |
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} |
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|
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/** |
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* Build the receipt HTML template. |
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* |
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* @param array<string, mixed> $donation Donation data. |
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* @param array<string, mixed>|null $donor Donor data. |
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* @param string $campaign_title Campaign title. |
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* @return string HTML content. |
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* @since 1.0.0 |
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*/ |
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private static function build_receipt_html( $donation, $donor, $campaign_title ) { |
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$site_name = esc_html( get_bloginfo( 'name' ) ); |
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$site_url = esc_url( site_url() ); |
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|
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$donation_id = Helper::get_integer_value( $donation['id'] ?? 0 ); |
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$donor_name = esc_html( Helper::get_string_value( $donor['name'] ?? '' ) ); |
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$donor_email = esc_html( Helper::get_string_value( $donor['email'] ?? '' ) ); |
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$payment_status = esc_html( ucfirst( Helper::get_string_value( $donation['payment_status'] ?? '' ) ) ); |
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$payment_method = esc_html( ucfirst( Helper::get_string_value( $donation['gateway'] ?? '' ) ) ); |
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$transaction_id = esc_html( Helper::get_string_value( $donation['transaction_id'] ?? '' ) ); |
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$currency = Helper::get_string_value( $donation['currency'] ?? 'USD' ); |
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$total = Helper::get_float_value( $donation['amount'] ?? 0 ); |
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$fees_covered = Helper::get_float_value( $donation['fees_covered'] ?? 0 ); |
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$amount = $total - $fees_covered; |
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$date = Helper::get_string_value( $donation['created_at'] ?? '' ); |
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|
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if ( ! empty( $date ) ) { |
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$date_format = Helper::get_string_value( get_option( 'date_format' ) ); |
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$timestamp = strtotime( $date ); |
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$formatted_date = false !== $timestamp ? wp_date( $date_format, $timestamp ) : false; |
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$date = is_string( $formatted_date ) ? $formatted_date : $date; |
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} |
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|
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$campaign_title = esc_html( $campaign_title ); |
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|
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// Format amounts. |
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$formatted_amount = self::format_currency( $amount, $currency ); |
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$formatted_fees = self::format_currency( $fees_covered, $currency ); |
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$formatted_total = self::format_currency( $total, $currency ); |
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|
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// Build transaction ID row. |
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$transaction_row = ''; |
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if ( ! empty( $transaction_id ) ) { |
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$transaction_row = sprintf( |
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'<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">%s</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">%s</td></tr>', |
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esc_html__( 'Transaction ID', 'suredonation' ), |
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$transaction_id |
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); |
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} |
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|
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// Build fees row. |
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$fees_row = ''; |
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if ( $fees_covered > 0 ) { |
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$fees_row = sprintf( |
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'<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">%s</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">%s</td></tr>', |
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esc_html__( 'Fees Covered', 'suredonation' ), |
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$formatted_fees |
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); |
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} |
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|
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return ' |
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<div style="max-width:560px;margin:0 auto;font-family:DejaVu Sans,sans-serif;color:#111827;"> |
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<div style="text-align:center;margin-bottom:24px;padding-bottom:20px;border-bottom:2px solid #e5e7eb;"> |
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<h1 style="font-size:20px;margin:0 0 4px;color:#111827;">' . $site_name . '</h1> |
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<p style="color:#6b7280;font-size:13px;margin:0;">' . esc_html__( 'Donation Receipt', 'suredonation' ) . '</p> |
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</div> |
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|
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<p style="color:#6b7280;font-size:12px;margin:0 0 16px;text-align:right;">' |
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. esc_html__( 'Receipt', 'suredonation' ) . ' #' . $donation_id . '</p> |
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|
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<table style="width:100%;border-collapse:collapse;margin-bottom:20px;border:1px solid #e5e7eb;border-radius:6px;"> |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;width:40%;">' |
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. esc_html__( 'Donor Name', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $donor_name . '</td></tr> |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">' |
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. esc_html__( 'Donor Email', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $donor_email . '</td></tr> |
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</table> |
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|
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<table style="width:100%;border-collapse:collapse;margin-bottom:20px;border:1px solid #e5e7eb;border-radius:6px;"> |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;width:40%;">' |
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. esc_html__( 'Campaign Name', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $campaign_title . '</td></tr> |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">' |
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. esc_html__( 'Payment Status', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $payment_status . '</td></tr> |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">' |
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. esc_html__( 'Payment Method', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $payment_method . '</td></tr> |
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' . $transaction_row . ' |
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<tr><td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;color:#6b7280;font-size:13px;">' |
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. esc_html__( 'Donation Amount', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;border-bottom:1px solid #e5e7eb;font-size:13px;color:#111827;">' . $formatted_amount . '</td></tr> |
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' . $fees_row . ' |
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<tr><td style="padding:10px 12px;background:#f9fafb;font-weight:bold;color:#111827;font-size:13px;">' |
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. esc_html__( 'Donation Total', 'suredonation' ) . '</td> |
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<td style="padding:10px 12px;background:#f9fafb;font-weight:bold;font-size:13px;color:#111827;">' . $formatted_total . '</td></tr> |
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</table> |
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|
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<p style="color:#6b7280;font-size:12px;margin:0 0 4px;">' |
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. esc_html__( 'Date', 'suredonation' ) . ': ' . esc_html( $date ) . '</p> |
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|
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<div style="margin-top:30px;padding-top:16px;border-top:1px solid #e5e7eb;text-align:center;"> |
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<p style="color:#9ca3af;font-size:11px;margin:0;">' |
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. sprintf( |
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/* translators: 1: Site name, 2: Site URL. */ |
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esc_html__( 'Generated by %1$s · %2$s', 'suredonation' ), |
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$site_name, |
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$site_url |
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) . '</p> |
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</div> |
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</div>'; |
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} |
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|
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/** |
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* Format a monetary amount with currency symbol. |
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* |
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* @param float $amount Amount to format. |
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* @param string $currency Currency code. |
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* @return string Formatted amount. |
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* @since 1.0.0 |
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*/ |
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private static function format_currency( $amount, $currency = 'USD' ) { |
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$symbols = [ |
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'USD' => '$', |
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'EUR' => '€', |
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'GBP' => '£', |
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'CAD' => 'CA$', |
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'AUD' => 'A$', |
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'INR' => '₹', |
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'JPY' => '¥', |
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]; |
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|
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$symbol = $symbols[ strtoupper( $currency ) ] ?? esc_html( $currency ) . ' '; |
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|
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return $symbol . number_format( $amount, 2 ); |
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} |
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|
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/** |
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* Convert a relative path to an absolute file path. |
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* |
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* @param string $relative_path Relative path within the uploads directory. |
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* @return string|false Absolute file path or false. |
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* @since 1.0.0 |
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*/ |
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private static function relative_to_path( $relative_path ) { |
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if ( empty( $relative_path ) ) { |
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return false; |
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} |
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|
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$upload_dir = wp_upload_dir(); |
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|
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return $upload_dir['basedir'] . '/' . $relative_path; |
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} |
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} |
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|
