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<?php |
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/** |
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* Services: Image Service. |
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* |
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* Add support for 16x9, 4x3 and 1x1 images as requested by Google specs. |
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* |
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* @see https://github.com/insideout10/wordlift-plugin/issues/830. |
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* @see https://developers.google.com/search/docs/data-types/article. |
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* |
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* @since 3.19.4 |
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* @package Wordlift |
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* @subpackage Wordlift/includes |
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*/ |
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/** |
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* Define the Wordlift_Image_Service class. |
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* |
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* @since 3.19.4 |
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*/ |
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class Wordlift_Image_Service { |
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/** |
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* The image ratios and sizes. |
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* |
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* @since 3.19.4 |
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* @access public |
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* @var array $sizes The image ratios and sizes. |
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*/ |
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public static $sizes = array( |
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'16x9' => array( 1200, 675 ), |
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'4x3' => array( 1200, 900 ), |
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'1x1' => array( 1200, 1200 ), |
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); |
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/** |
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* Create a {@link Wordlift_Image_Service} instance. |
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* |
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* @since 3.19.4 |
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*/ |
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public function __construct() { |
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// Add hook to define the image sizes. Since we're a plugin, we cannot use the |
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// `after_theme_setup` hook. |
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add_action( 'init', array( $this, 'after_theme_setup' ) ); |
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} |
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/** |
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* Hook `after_theme_setup`: add our own image sizes. |
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* |
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* @since 3.19.4 |
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*/ |
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public function after_theme_setup() { |
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foreach ( self::$sizes as $ratio => $sizes ) { |
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add_image_size( "wl-$ratio", $sizes[0], $sizes[1], true ); |
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} |
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} |
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/** |
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* Get the sources for the specified attachment. |
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* |
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* @since 3.19.4 |
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* |
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* @param int $attachment_id The attachment id. |
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* |
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* @return array { |
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* An array of image sources. |
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* |
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* @type string $url The attachment URL. |
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* @type int $width The attachment width. |
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* @type int $height The attachment height. |
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* } |
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*/ |
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public static function get_sources( $attachment_id ) { |
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// Get the source for the specified image sizes. |
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$sources = array_map( function ( $ratio ) use ( $attachment_id ) { |
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// Get the source of the specified ratio. |
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$source = wp_get_attachment_image_src( $attachment_id, "wl-$ratio" ); |
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// Get the size for the specified ratio. |
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$size = Wordlift_Image_Service::$sizes[ $ratio ]; |
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// Check that the source has an image, and the required size. |
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if ( empty( $source[0] ) || $size[0] !== $source[1] || $size[1] !== $source[2] ) { |
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return null; |
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} |
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// Return the source. |
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return $source; |
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}, array_keys( self::$sizes ) ); |
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// Filter unavailable sources. |
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$sources_1200 = array_filter( $sources ); |
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// Make the results unique. |
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return $sources_1200; |
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} |
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} |
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insideout10 /
wordlift-plugin
