| 1 |
<?php |
| 2 |
/** |
| 3 |
* WaterMark Handler Class |
| 4 |
* |
| 5 |
* Handles all watermark related operations with improved organization and caching |
| 6 |
*/ |
| 7 |
class WaterMarkHandler { |
| 8 |
/** @var string */ |
| 9 |
private $cache_dir; |
| 10 |
|
| 11 |
/** @var string */ |
| 12 |
private $font_dir; |
| 13 |
|
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/** @var array */ |
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private $options; |
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|
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/** |
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* Constructor |
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* |
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* @param array $options Watermark options |
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*/ |
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public function __construct(array $options) { |
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$this->options = $options; |
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$this->cache_dir = plugin_dir_path(__FILE__) . 'cache/'; |
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$this->font_dir = plugin_dir_path(__FILE__) . 'fonts/'; |
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|
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// Ensure cache directory exists |
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if (!file_exists($this->cache_dir)) { |
| 29 |
wp_mkdir_p($this->cache_dir); |
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} |
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} |
| 32 |
|
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/** |
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* Generate cache key for watermark options |
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* |
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* @param string $img_url |
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* @param array $options |
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* @return string |
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*/ |
| 40 |
private function generateCacheKey(string $img_url, array $options): string { |
| 41 |
return md5($img_url . serialize($options)); |
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} |
| 43 |
|
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/** |
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* Check if cached version exists |
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* |
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* @param string $cache_key |
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* @return string|false |
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*/ |
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private function getCachedImage(string $cache_key) { |
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$cache_file = $this->cache_dir . $cache_key . '.jpg'; |
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if (file_exists($cache_file) && (time() - filemtime($cache_file) < 3600)) { |
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return $cache_file; |
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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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* Create text watermark with improved error handling and caching |
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* |
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* @param string $img_url |
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* @param string $new_img_url |
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* @param string $text |
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* @param array $options |
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* @return bool |
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*/ |
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public function createTextWatermark(string $img_url, string $new_img_url, string $text, array $options = []): bool { |
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try { |
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// Generate cache key |
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$cache_key = $this->generateCacheKey($img_url, array_merge($this->options, $options)); |
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|
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// Check cache |
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$cached_file = $this->getCachedImage($cache_key); |
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if ($cached_file) { |
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copy($cached_file, $new_img_url); |
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return true; |
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} |
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|
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// Validate image |
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$img_size = getimagesize($img_url); |
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if (empty($img_size)) { |
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throw new Exception('Invalid image file'); |
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} |
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|
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// Validate dimensions |
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if ($img_size[0] < $this->options['watermark_min_width'] || |
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$img_size[1] < $this->options['watermark_min_height']) { |
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throw new Exception('Image dimensions too small for watermark'); |
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} |
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|
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// Create image resource |
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$im = $this->createImageResource($img_url, $img_size['mime']); |
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if (!$im) { |
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throw new Exception('Failed to create image resource'); |
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} |
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|
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// Apply text watermark |
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$text_color = $this->parseColor($options['text_color'] ?? $this->options['text_color']); |
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$font_file = $this->font_dir . ($options['text_font'] ?? $this->options['text_font']); |
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|
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if (!file_exists($font_file)) { |
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throw new Exception('Font file not found'); |
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} |
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|
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$text_color = imagecolorallocate($im, $text_color['r'], $text_color['g'], $text_color['b']); |
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$position = $this->calculatePosition($options['position'] ?? $this->options['watermark_position'], |
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$img_size[0], |
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$img_size[1], |
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$text); |
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|
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// Add watermark |
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imagettftext( |
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$im, |
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$options['text_size'] ?? $this->options['text_size'], |
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$options['text_angle'] ?? $this->options['text_angle'], |
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$position['x'], |
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$position['y'], |
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$text_color, |
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$font_file, |
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$text |
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); |
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|
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// Save image |
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$this->saveImage($im, $new_img_url, $img_size['mime']); |
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|
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// Cache result |
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copy($new_img_url, $this->cache_dir . $cache_key . '.jpg'); |
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|
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imagedestroy($im); |
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return true; |
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|
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} catch (Exception $e) { |
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error_log('WaterMark Error: ' . $e->getMessage()); |
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return false; |
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} |
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} |
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|
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/** |
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* Create image watermark with improved error handling and caching |
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* |
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* @param string $img_url |
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* @param string $watermark_url |
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* @param string $new_img_url |
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* @param array $options |
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* @return bool |
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*/ |
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public function createImageWatermark(string $img_url, string $watermark_url, string $new_img_url, array $options = []): bool { |
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try { |
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// Generate cache key |
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$cache_key = $this->generateCacheKey($img_url, array_merge($this->options, $options)); |
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|
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// Check cache |
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$cached_file = $this->getCachedImage($cache_key); |
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if ($cached_file) { |
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copy($cached_file, $new_img_url); |
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return true; |
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} |
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|
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// Validate image |
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$img_size = getimagesize($img_url); |
| 161 |
if (empty($img_size)) { |
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throw new Exception('Invalid image file'); |
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} |
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|
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// Validate dimensions |
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if ($img_size[0] < $this->options['watermark_min_width'] || |
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$img_size[1] < $this->options['watermark_min_height']) { |
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throw new Exception('Image dimensions too small for watermark'); |
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} |
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|
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// Create image resource |
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$im = $this->createImageResource($img_url, $img_size['mime']); |
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if (!$im) { |
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throw new Exception('Failed to create image resource'); |
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} |
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|
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// Load watermark image |
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$watermark_size = getimagesize($watermark_url); |
| 179 |
if (!$watermark_size) { |
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throw new Exception('Invalid watermark image'); |
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} |
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|
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$watermark = $this->createImageResource($watermark_url, $watermark_size['mime']); |
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if (!$watermark) { |
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throw new Exception('Failed to create watermark resource'); |
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} |
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|
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// Calculate position |
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$position = $this->calculatePosition( |
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$options['watermark_position'] ?? $this->options['watermark_position'], |
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$img_size[0], |
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$img_size[1], |
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'', |
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$watermark_size[0], |
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$watermark_size[1] |
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); |
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|
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// Set transparency |
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$opacity = ($options['watermark_diaphaneity'] ?? $this->options['watermark_diaphaneity']) / 100; |
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imagealphablending($watermark, true); |
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imagesavealpha($watermark, true); |
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|
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// Apply watermark |
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$this->imagecopymerge_alpha($im, $watermark, $position['x'], $position['y'], 0, 0, |
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$watermark_size[0], $watermark_size[1], $opacity * 100); |
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|
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// Save image |
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$this->saveImage($im, $new_img_url, $img_size['mime']); |
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|
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// Cache result |
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copy($new_img_url, $this->cache_dir . $cache_key . '.jpg'); |
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|
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// Clean up |
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imagedestroy($im); |
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imagedestroy($watermark); |
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|
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return true; |
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|
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} catch (Exception $e) { |
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error_log('WaterMark Error: ' . $e->getMessage()); |
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return false; |
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} |
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} |
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|
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/** |
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* Helper function to create image resource |
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* |
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* @param string $img_url |
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* @param string $mime_type |
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* @return resource|false |
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*/ |
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private function createImageResource(string $img_url, string $mime_type) { |
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$create_functions = [ |
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'image/jpeg' => 'imagecreatefromjpeg', |
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'image/png' => 'imagecreatefrompng', |
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'image/gif' => 'imagecreatefromgif' |
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]; |
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|
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if (isset($create_functions[$mime_type])) { |
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return call_user_func($create_functions[$mime_type], $img_url); |
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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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* Helper function to save image |
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* |
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* @param resource $im |
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* @param string $filename |
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* @param string $mime_type |
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* @return bool |
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*/ |
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private function saveImage($im, string $filename, string $mime_type): bool { |
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$save_functions = [ |
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'image/jpeg' => 'imagejpeg', |
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'image/png' => 'imagepng', |
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'image/gif' => 'imagegif' |
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]; |
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|
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if (isset($save_functions[$mime_type])) { |
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return call_user_func($save_functions[$mime_type], $im, $filename); |
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} |
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|
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return false; |
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} |
| 267 |
|
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/** |
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* Parse hex color to RGB |
| 270 |
*/ |
| 271 |
private function parseColor($hex_color) { |
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$hex_color = ltrim($hex_color, '#'); |
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return [ |
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'r' => hexdec(substr($hex_color, 0, 2)), |
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'g' => hexdec(substr($hex_color, 2, 2)), |
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'b' => hexdec(substr($hex_color, 4, 2)) |
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]; |
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} |
| 279 |
|
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/** |
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* Helper function for alpha-enabled imagecopymerge |
| 282 |
* |
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* @param resource $dst_im |
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* @param resource $src_im |
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* @param int $dst_x |
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* @param int $dst_y |
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* @param int $src_x |
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* @param int $src_y |
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* @param int $src_w |
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* @param int $src_h |
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* @param int $pct |
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* @return void |
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*/ |
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private function imagecopymerge_alpha($dst_im, $src_im, int $dst_x, int $dst_y, int $src_x, int $src_y, int $src_w, int $src_h, int $pct): void { |
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// Create a new transparent image |
| 296 |
$cut = imagecreatetruecolor($src_w, $src_h); |
| 297 |
imagealphablending($cut, false); |
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imagesavealpha($cut, true); |
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|
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// Copy source image |
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imagecopy($cut, $dst_im, 0, 0, intval($dst_x), intval($dst_y), $src_w, $src_h); |
| 302 |
|
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// Copy watermark with transparency |
| 304 |
imagecopy($cut, $src_im, 0, 0, intval($src_x), intval($src_y), $src_w, $src_h); |
| 305 |
imagecopymerge($dst_im, $cut, intval($dst_x), intval($dst_y), 0, 0, $src_w, $src_h, intval($pct)); |
| 306 |
|
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imagedestroy($cut); |
| 308 |
} |
| 309 |
|
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/** |
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* Calculate watermark position |
| 312 |
* |
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* @param string $position |
| 314 |
* @param int $img_width |
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* @param int $img_height |
| 316 |
* @param string $text |
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* @param int $mark_width |
| 318 |
* @param int $mark_height |
| 319 |
* @return array{x: int, y: int} |
| 320 |
*/ |
| 321 |
private function calculatePosition(string $position, int $img_width, int $img_height, string $text = '', int $mark_width = 0, int $mark_height = 0): array { |
| 322 |
$margin = intval($this->options['watermark_margin']); |
| 323 |
|
| 324 |
// For text watermark |
| 325 |
if ($text !== '') { |
| 326 |
$font_size = $this->options['text_size']; |
| 327 |
$font_file = $this->font_dir . $this->options['text_font']; |
| 328 |
$text_box = imagettfbbox($font_size, 0, $font_file, $text); |
| 329 |
$mark_width = abs($text_box[4] - $text_box[0]); |
| 330 |
$mark_height = abs($text_box[1] - $text_box[5]); |
| 331 |
} |
| 332 |
|
| 333 |
// Calculate position |
| 334 |
switch ($position) { |
| 335 |
case 'top-left': |
| 336 |
return [ |
| 337 |
'x' => $margin, |
| 338 |
'y' => $margin + $mark_height |
| 339 |
]; |
| 340 |
|
| 341 |
case 'top-center': |
| 342 |
return [ |
| 343 |
'x' => intval(($img_width - $mark_width) / 2), |
| 344 |
'y' => $margin + $mark_height |
| 345 |
]; |
| 346 |
|
| 347 |
case 'top-right': |
| 348 |
return [ |
| 349 |
'x' => $img_width - $mark_width - $margin, |
| 350 |
'y' => $margin + $mark_height |
| 351 |
]; |
| 352 |
|
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case 'middle-left': |
| 354 |
return [ |
| 355 |
'x' => $margin, |
| 356 |
'y' => intval(($img_height + $mark_height) / 2) |
| 357 |
]; |
| 358 |
|
| 359 |
case 'middle-center': |
| 360 |
return [ |
| 361 |
'x' => intval(($img_width - $mark_width) / 2), |
| 362 |
'y' => intval(($img_height + $mark_height) / 2) |
| 363 |
]; |
| 364 |
|
| 365 |
case 'middle-right': |
| 366 |
return [ |
| 367 |
'x' => $img_width - $mark_width - $margin, |
| 368 |
'y' => intval(($img_height + $mark_height) / 2) |
| 369 |
]; |
| 370 |
|
| 371 |
case 'bottom-left': |
| 372 |
return [ |
| 373 |
'x' => $margin, |
| 374 |
'y' => $img_height - $margin - $mark_height |
| 375 |
]; |
| 376 |
|
| 377 |
case 'bottom-center': |
| 378 |
return [ |
| 379 |
'x' => intval(($img_width - $mark_width) / 2), |
| 380 |
'y' => $img_height - $margin - $mark_height |
| 381 |
]; |
| 382 |
|
| 383 |
case 'bottom-right': |
| 384 |
default: |
| 385 |
return [ |
| 386 |
'x' => $img_width - $mark_width - $margin, |
| 387 |
'y' => $img_height - $margin - $mark_height |
| 388 |
]; |
| 389 |
} |
| 390 |
} |
| 391 |
} |
