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<?php |
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use setasign\FpdiProtection\FpdiProtection; |
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|
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require_once __DIR__ . '/bootstrap.php'; |
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|
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if (!function_exists('ebook_store_rc4_supported')) { |
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function ebook_store_rc4_supported() { |
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if (!function_exists('openssl_encrypt') || !function_exists('openssl_get_cipher_methods')) { |
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return false; |
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} |
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$methods = array_map('strtolower', openssl_get_cipher_methods()); |
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if (!in_array('rc4-40', $methods, true) && !in_array('rc4', $methods, true)) { |
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return false; |
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} |
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if (defined('OPENSSL_VERSION_NUMBER') && OPENSSL_VERSION_NUMBER >= 0x30000000 && PHP_VERSION_ID < 80100) { |
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$out = @openssl_encrypt('SetaPDF', 'rc4-40', 'check-for-support-key', OPENSSL_RAW_DATA, ''); |
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if ($out === false) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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|
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if (!function_exists('ebook_store_should_use_arcfour_fallback')) { |
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function ebook_store_should_use_arcfour_fallback() { |
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static $fallback = null; |
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if ($fallback === null) { |
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$fallback = !ebook_store_rc4_supported(); |
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if ($fallback) { |
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error_log('Ebook Store: Falling back to internal RC4 implementation for PDF encryption (OpenSSL RC4 unavailable).'); |
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} |
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} |
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return $fallback; |
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} |
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} |
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|
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|
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global $ebook_store_page_counter; |
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$ebook_store_page_counter = 0; |
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|
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if (!function_exists('ebook_store_raise_pdf_memory')) { |
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/** |
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* Make sure there is enough memory to load and re-write a PDF before TCPDF |
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* pulls the whole source into memory. Watermarking a large (multi-MB) book |
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* can peak well above the default front-end limit, so raise it toward a safe |
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* floor — but only ever upward, never lowering a host that already allows more. |
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* |
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* @param int $floor_mb Minimum megabytes the encryption pass should have. |
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*/ |
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function ebook_store_raise_pdf_memory($floor_mb = 256) { |
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$current = trim((string) @ini_get('memory_limit')); |
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if ($current === '' || $current === '-1') { |
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return; // Unlimited already. |
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} |
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$unit = strtolower(substr($current, -1)); |
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$value = (int) $current; |
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if ($unit === 'g') { |
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$bytes = $value * 1024 * 1024 * 1024; |
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} elseif ($unit === 'm') { |
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$bytes = $value * 1024 * 1024; |
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} elseif ($unit === 'k') { |
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$bytes = $value * 1024; |
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} else { |
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$bytes = $value; |
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} |
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if ($bytes < $floor_mb * 1024 * 1024) { |
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@ini_set('memory_limit', $floor_mb . 'M'); |
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} |
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} |
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} |
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|
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if (!function_exists('ebook_store_text_is_rtl')) { |
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/** |
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* Does this text contain right-to-left script (Hebrew or Arabic)? |
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* |
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* @param string $text UTF-8 text. |
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* @return bool |
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*/ |
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function ebook_store_text_is_rtl($text) { |
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return (bool) preg_match('/[\x{0590}-\x{05FF}\x{0600}-\x{06FF}\x{0700}-\x{074F}\x{0750}-\x{077F}\x{08A0}-\x{08FF}\x{FB1D}-\x{FDFF}\x{FE70}-\x{FEFF}]/u', (string) $text); |
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} |
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} |
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|
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if (!function_exists('ebook_store_pdf_watermark_font')) { |
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/** |
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* Pick a bundled Unicode font that covers the watermark text. |
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* |
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* DejaVu Sans covers Latin, Cyrillic, Greek and Hebrew; FreeSerif adds |
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* Arabic (with joining/shaping), so it is used when Arabic is present. |
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* |
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* @param string $text UTF-8 text. |
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* @return string TCPDF font family. |
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*/ |
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function ebook_store_pdf_watermark_font($text) { |
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if (preg_match('/[\x{0600}-\x{06FF}\x{0750}-\x{077F}\x{08A0}-\x{08FF}\x{FB50}-\x{FDFF}\x{FE70}-\x{FEFF}]/u', (string) $text)) { |
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return 'freeserif'; |
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} |
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return 'dejavusans'; |
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} |
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} |
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|
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/** |
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* Watermark + encryption document, built on TCPDF (via its FPDI adapter). |
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* |
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* TCPDF replaces the old FPDF core-font engine so the buyer watermark can be |
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* drawn in any script — Cyrillic, Hebrew, Arabic, CJK — with an embedded |
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* Unicode font and proper right-to-left ordering. The QR code is drawn natively |
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* as vectors (no external QR service, no GD, no allow_url_fopen), and TCPDF's |
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* own SetProtection() handles encryption, so fpdi-protection is no longer used. |
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*/ |
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class QRPDF extends \setasign\Fpdi\Tcpdf\Fpdi { |
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|
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/** @var string UTF-8 watermark line, already merged with buyer data. */ |
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public $watermarkText = ''; |
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|
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/** @var string URL the QR code should point at. */ |
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public $qrText = ''; |
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|
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/** @var int How many pages have been stamped so far. */ |
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public $stampCount = 0; |
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|
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public function __construct($orientation = 'P', $unit = 'mm', $size = 'A4') { |
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parent::__construct($orientation, $unit, $size, true, 'UTF-8', false); |
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$this->setPrintHeader(false); |
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$this->setPrintFooter(false); |
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$this->SetAutoPageBreak(false, 0); |
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$this->SetMargins(0, 0, 0); |
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$this->setCellPaddings(0, 0, 0, 0); |
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$this->setCellMargins(0, 0, 0, 0); |
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// Keep imported pages pixel-faithful. |
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$this->setImageScale(1); |
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// Embed only the glyphs actually used in the watermark, so a delivered |
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// PDF grows by a few KB rather than the whole ~600 KB Unicode font. |
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$this->setFontSubsetting(true); |
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} |
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|
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/** |
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* Draw the QR code and buyer watermark onto the current (already-imported) |
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* page. Call once per page, right after useTemplate(). |
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*/ |
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public function stampCurrentPage() { |
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// "First page only" mode: skip everything after the first stamp. |
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if (get_option('ebook_store_watermark_mode', 'every') === 'first' && $this->stampCount >= 1) { |
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$this->stampCount++; |
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return; |
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} |
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|
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$pw = $this->getPageWidth(); |
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$ph = $this->getPageHeight(); |
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|
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if (get_option('qr_code') && $this->qrText !== '') { |
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$box = 18; |
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$style = array( |
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'border' => 0, |
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'vpadding' => 0, |
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'hpadding' => 0, |
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'fgcolor' => array(0, 0, 0), |
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'bgcolor' => false, |
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'module_width' => 1, |
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'module_height' => 1, |
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); |
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$this->write2DBarcode($this->qrText, 'QRCODE,M', $pw - $box - 4, $ph - $box - 4, $box, $box, $style, 'N'); |
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} |
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|
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if (get_option('buyer_info') && $this->watermarkText !== '') { |
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$this->SetFont(ebook_store_pdf_watermark_font($this->watermarkText), '', 11); |
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|
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$rgb = sscanf((string) get_option('ebook_store_watermark_color_hex', '#FF0000'), '#%02x%02x%02x'); |
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$this->SetTextColor((int) $rgb[0], (int) $rgb[1], (int) $rgb[2]); |
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|
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// TCPDF re-orders right-to-left text correctly when RTL mode is on. |
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$this->setRTL(ebook_store_text_is_rtl($this->watermarkText)); |
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|
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$position = get_option('ebook_store_buyer_info_position', 'top'); |
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if ($position === 'bottom') { |
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$y = $ph - 12; |
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} elseif ($position === 'middle') { |
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$y = ($ph / 2) - 4; |
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} else { |
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$y = 4; |
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} |
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|
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$this->SetXY(0, $y); |
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$this->Cell(0, 8, $this->watermarkText, 0, 0, 'C'); |
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$this->setRTL(false); |
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} |
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|
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$this->stampCount++; |
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} |
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|
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/** |
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* Apply the reader restrictions and passwords, mapping the plugin's options |
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* to TCPDF's permission model (a list of GRANTED permissions). |
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* |
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* @param string $user_password Password the reader types to open the file. |
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* @param string $owner_password Password that can change the restrictions. |
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*/ |
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public function applyProtection($user_password, $owner_password) { |
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$granted = array('print', 'modify', 'copy', 'annot-forms', 'fill-forms', 'extract', 'assemble', 'print-high'); |
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|
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if (get_option('disable_pdf_printing') == 1) { |
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$granted = array_diff($granted, array('print', 'print-high')); |
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} |
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if (get_option('disable_pdf_copy') == 1) { |
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$granted = array_diff($granted, array('copy', 'extract')); |
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} |
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if (get_option('disable_pdf_modify') == 1) { |
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$granted = array_diff($granted, array('modify', 'assemble')); |
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} |
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if (get_option('disable_annot-forms') == 1) { |
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$granted = array_diff($granted, array('annot-forms', 'fill-forms')); |
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} |
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|
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// TCPDF: SetProtection(permissions_granted, user_pass, owner_pass). |
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// An owner password is required for the restrictions to be enforceable. |
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$this->SetProtection( |
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array_values($granted), |
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(string) $user_password, |
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$owner_password !== '' ? (string) $owner_password : null |
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); |
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} |
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} |
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|
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class QRClass{ |
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|
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|
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|
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/* Plain text */ |
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|
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|
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|
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public function text($text, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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// return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl='.urlencode($text); |
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return 'https://api.qrserver.com/v1/create-qr-code/?size='.$size_w.'x'.$size_h.'&data='.urlencode($text); |
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|
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|
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|
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} |
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|
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|
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|
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/* E-mail addresses */ |
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|
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|
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|
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function email($email, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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//return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl=mailto%3A'.urlencode($email); |
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return 'https://api.qrserver.com/v1/create-qr-code/?size='.$size_w.'x'.$size_h.'&data='.urlencode($text); |
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|
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|
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|
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} |
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|
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|
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|
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/* Phone numbers */ |
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|
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|
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|
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function phone_numbers($number, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl=tel%3A'.urlencode($number); |
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|
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|
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|
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} |
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|
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|
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|
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/* URL */ |
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|
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|
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|
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function url($url, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl='.urlencode($url); |
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|
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|
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|
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} |
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|
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|
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|
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/* SMS */ |
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|
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|
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|
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function sms($receiver, $message, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl=smsto%3A'.urlencode($receiver).'%3A'.urlencode($message); |
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|
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|
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|
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} |
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|
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|
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|
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/* Wifi network */ |
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|
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|
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|
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function wifi($ssid, $password, $type, $size_h = 350, $size_w = 350) { |
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|
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|
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|
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return 'http://chart.apis.google.com/chart?cht=qr&chs='.$size_w.'x'.$size_h.'&chl=WIFI%3AS%3A'.$ssid.'%3BT%3A'.$type.'%3BP%3A'.$password.'%3B%3B'; |
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|
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|
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|
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} |
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|
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|
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|
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/* Save image */ |
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|
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|
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|
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function save($image, $destination) { |
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|
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|
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|
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if(file_exists($destination)) { |
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|
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|
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|
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return FALSE; |
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|
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|
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|
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} else { |
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|
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|
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//wp_die(' IMG PATH ' . $image); |
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|
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|
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$fp = fopen ($destination, 'w+'); // open file handle |
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|
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$ch = curl_init($image); |
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// curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want |
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curl_setopt($ch, CURLOPT_FILE, $fp); // output to file |
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); |
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curl_setopt($ch, CURLOPT_TIMEOUT, 1000); // some large value to allow curl to run for a long time |
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curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36'); |
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// curl_setopt($ch, CURLOPT_VERBOSE, true); // Enable this line to see debug prints |
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curl_exec($ch); |
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|
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curl_close($ch); // closing curl handle |
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fclose($fp); |
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|
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|
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//$img = imagecreatefrompng($image); |
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|
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//imagepng($img, $destination); |
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|
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//file_put_contents($destination,file_get_contents($image)); |
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|
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return TRUE; |
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|
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|
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|
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} |
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|
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|
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|
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} |
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|
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|
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|
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|
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|
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} |
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|
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|
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|
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?> |
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|
