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| 1 | <?php |
| 2 | /** |
| 3 | * ExistingImageRedirectFragment |
| 4 | * |
| 5 | * Renders .htaccess rules that prefer serving a `.webp` variant when both the |
| 6 | * original image and the `.webp` version exist on disk. |
| 7 | * Example: If both `/images/hero.jpg` and `/images/hero.webp` exist, rewrite |
| 8 | * to serve `/images/hero.webp`. |
| 9 | * |
| 10 | * Uses the centralized Htaccess fragment system to ensure single, debounced writes. |
| 11 | * |
| 12 | * @package NewfoldLabs\WP\Module\Performance\Images\Fragments |
| 13 | * @since 1.0.0 |
| 14 | */ |
| 15 | |
| 16 | namespace NewfoldLabs\WP\Module\Performance\Images\Fragments; |
| 17 | |
| 18 | use NewfoldLabs\WP\Module\Htaccess\Fragment; |
| 19 | use NewfoldLabs\WP\Module\Htaccess\Context; |
| 20 | |
| 21 | /** |
| 22 | * Fragment: WebP Existing Image Redirect |
| 23 | * |
| 24 | * If the requested original image exists and a `.webp` variant also exists, |
| 25 | * this fragment rewrites to the `.webp` file (prefer optimized). |
| 26 | * |
| 27 | * @since 1.0.0 |
| 28 | */ |
| 29 | final class ExistingImageRedirectFragment implements Fragment { |
| 30 | |
| 31 | /** |
| 32 | * Globally-unique fragment identifier used by the registry. |
| 33 | * |
| 34 | * @var string |
| 35 | */ |
| 36 | private $id; |
| 37 | |
| 38 | /** |
| 39 | * Human-friendly marker text printed in BEGIN/END comments. |
| 40 | * |
| 41 | * @var string |
| 42 | */ |
| 43 | private $marker_label; |
| 44 | |
| 45 | /** |
| 46 | * Constructor. |
| 47 | * |
| 48 | * @since 1.0.0 |
| 49 | * |
| 50 | * @param string $id Unique fragment ID used by the registry. |
| 51 | * @param string $marker_label Marker label shown in BEGIN/END comments. |
| 52 | */ |
| 53 | public function __construct( $id, $marker_label ) { |
| 54 | $this->id = (string) $id; |
| 55 | $this->marker_label = (string) $marker_label; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Get the unique fragment ID. |
| 60 | * |
| 61 | * @since 1.0.0 |
| 62 | * |
| 63 | * @return string Fragment identifier. |
| 64 | */ |
| 65 | public function id() { |
| 66 | return $this->id; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Get the execution priority relative to other fragments. |
| 71 | * |
| 72 | * Runs after the core WordPress rules. |
| 73 | * |
| 74 | * @since 1.0.0 |
| 75 | * |
| 76 | * @return int Priority constant. |
| 77 | */ |
| 78 | public function priority() { |
| 79 | return self::PRIORITY_POST_WP; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Whether this fragment is exclusive (only a single instance may render). |
| 84 | * |
| 85 | * @since 1.0.0 |
| 86 | * |
| 87 | * @return bool True if exclusive. |
| 88 | */ |
| 89 | public function exclusive() { |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Whether this fragment is enabled for the given context. |
| 95 | * |
| 96 | * Upper-layer logic (register/unregister) controls enablement; once |
| 97 | * instantiated, this always returns true. |
| 98 | * |
| 99 | * @since 1.0.0 |
| 100 | * |
| 101 | * @param Context $context Context snapshot (unused). |
| 102 | * @return bool True when enabled. |
| 103 | */ |
| 104 | public function is_enabled( $context ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 105 | return true; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Render the .htaccess rules for existing-image → prefer .webp redirects. |
| 110 | * |
| 111 | * @since 1.0.0 |
| 112 | * |
| 113 | * @param Context $context Context snapshot (unused). |
| 114 | * @return string Rendered fragment including BEGIN/END comments. |
| 115 | */ |
| 116 | public function render( $context ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 117 | $lines = array(); |
| 118 | $lines[] = '# BEGIN ' . $this->marker_label; |
| 119 | $lines[] = '<IfModule mod_rewrite.c>'; |
| 120 | $lines[] = "\tRewriteEngine On"; |
| 121 | $lines[] = "\tRewriteCond %{REQUEST_FILENAME} -f"; |
| 122 | $lines[] = "\tRewriteCond %{REQUEST_URI} (.+)\\.(gif|bmp|jpg|jpeg|png|tiff|svg|webp)$ [NC]"; |
| 123 | $lines[] = "\tRewriteCond %{DOCUMENT_ROOT}%1.webp -f"; |
| 124 | $lines[] = "\tRewriteRule ^(.+)\\.(gif|bmp|jpg|jpeg|png|tiff|svg|webp)$ $1.webp [T=image/webp,E=WEBP_REDIRECT:1,L]"; |
| 125 | $lines[] = '</IfModule>'; |
| 126 | $lines[] = '# END ' . $this->marker_label; |
| 127 | |
| 128 | return implode( "\n", $lines ); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Optional regex patches (none for this fragment). |
| 133 | * |
| 134 | * @param Context $context Context snapshot (unused). |
| 135 | * @return array |
| 136 | */ |
| 137 | public function patches( $context ) { |
| 138 | return array(); |
| 139 | } |
| 140 | } |