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<?php |
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declare(strict_types=1); |
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|
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namespace Imagify\CDN; |
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|
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use Imagify\EventManagement\SubscriberInterface; |
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|
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/** |
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* CDN subscriber |
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*/ |
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class CDN implements SubscriberInterface { |
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/** |
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* Array of events this subscriber listens to |
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* |
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* @return array |
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*/ |
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public static function get_subscribed_events() { |
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return [ |
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'imagify_cdn_source_url' => 'get_cdn_source', |
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]; |
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} |
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|
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/** |
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* Get the CDN "source". |
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* |
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* @since 1.9.3 |
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* |
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* @param string $option_url An URL to use instead of the one stored in the option. It is used only if no constant/filter. |
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* |
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* @return array { |
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* @type string $source Where does it come from? Possible values are 'constant', 'filter', or 'option'. |
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* @type string $name Who? Can be a constant name, a plugin name, or an empty string. |
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* @type string $url The CDN URL, with a trailing slash. An empty string if no URL is set. |
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* } |
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*/ |
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public function get_cdn_source( $option_url = '' ) { |
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if ( defined( 'IMAGIFY_CDN_URL' ) && IMAGIFY_CDN_URL && is_string( IMAGIFY_CDN_URL ) ) { |
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// Use a constant. |
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$source = [ |
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'source' => 'constant', |
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'name' => 'IMAGIFY_CDN_URL', |
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'url' => IMAGIFY_CDN_URL, |
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]; |
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} else { |
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// Maybe use a filter. |
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$filter_source = [ |
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'name' => null, |
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'url' => null, |
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]; |
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|
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/** |
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* Provide a custom CDN source. |
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* |
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* @since 1.9.3 |
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* |
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* @param array $filter_source { |
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* @type $name string The name of which provides the URL (plugin name, etc). |
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* @type $url string The CDN URL. |
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* } |
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*/ |
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$filter_source = apply_filters( 'imagify_cdn_source', $filter_source ); |
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|
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if ( ! empty( $filter_source['url'] ) ) { |
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$source = [ |
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'source' => 'filter', |
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'name' => ! empty( $filter_source['name'] ) ? $filter_source['name'] : '', |
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'url' => $filter_source['url'], |
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]; |
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} |
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} |
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|
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if ( empty( $source['url'] ) ) { |
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// No constant, no filter: use the option. |
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$source = [ |
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'source' => 'option', |
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'name' => '', |
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'url' => $option_url && is_string( $option_url ) ? $option_url : get_imagify_option( 'cdn_url' ), |
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]; |
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} |
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|
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if ( empty( $source['url'] ) ) { |
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// Nothing set. |
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return [ |
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'source' => 'option', |
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'name' => '', |
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'url' => '', |
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]; |
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} |
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|
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$source['url'] = $this->sanitize_cdn_url( $source['url'] ); |
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|
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if ( empty( $source['url'] ) ) { |
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// Not an URL. |
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return [ |
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'source' => 'option', |
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'name' => '', |
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'url' => '', |
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]; |
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} |
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|
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return $source; |
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} |
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|
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/** |
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* Sanitize the CDN URL value. |
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* |
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* @since 1.9.3 |
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* |
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* @param string $url The URL to sanitize. |
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* |
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* @return string |
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*/ |
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public function sanitize_cdn_url( $url ) { |
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$url = sanitize_text_field( $url ); |
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|
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if ( ! $url || ! preg_match( '@^https?://.+\.[^.]+@i', $url ) ) { |
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// Not an URL. |
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return ''; |
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} |
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|
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return trailingslashit( $url ); |
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} |
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} |
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|
