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1 year ago
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3 weeks ago
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PreloadService.php
141 lines
| 1 | <?php |
| 2 | /** |
| 3 | * PreloadService class file. |
| 4 | * |
| 5 | * This file contains the PreloadService class which handles preloading of components. |
| 6 | * |
| 7 | * @package PrestoPlayer |
| 8 | * @subpackage Services |
| 9 | */ |
| 10 | |
| 11 | namespace PrestoPlayer\Services; |
| 12 | |
| 13 | use PrestoPlayer\Support\Utility; |
| 14 | |
| 15 | /** |
| 16 | * Class PreloadService |
| 17 | * |
| 18 | * Handles the preloading of components for Presto Player. |
| 19 | */ |
| 20 | class PreloadService { |
| 21 | |
| 22 | /** |
| 23 | * The stats file path. |
| 24 | * |
| 25 | * @var string |
| 26 | */ |
| 27 | protected $stats_file = PRESTO_PLAYER_PLUGIN_DIR . 'dist/components/stats.json'; |
| 28 | |
| 29 | /** |
| 30 | * Components to preload. |
| 31 | * |
| 32 | * @var array |
| 33 | */ |
| 34 | protected $components = array(); |
| 35 | |
| 36 | /** |
| 37 | * Bootstrap the preload. |
| 38 | * |
| 39 | * @return void |
| 40 | */ |
| 41 | public function bootstrap() { |
| 42 | // Preload components. |
| 43 | add_action( 'wp_head', array( $this, 'renderComponents' ) ); |
| 44 | add_action( 'wp_footer', array( $this, 'renderComponents' ) ); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Render the components |
| 49 | * |
| 50 | * @return void |
| 51 | */ |
| 52 | public function renderComponents() { |
| 53 | if ( ! empty( $this->components ) ) { |
| 54 | $this->renderTag( $this->components ); |
| 55 | $this->components = array(); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Render the preload tags. |
| 61 | * |
| 62 | * @param array $components An array of components. |
| 63 | * @param string $format The format. |
| 64 | * @param string $path The path to the component javascript file. |
| 65 | * |
| 66 | * @return void |
| 67 | */ |
| 68 | public function renderTag( $components, $format = 'esmBrowser', $path = 'dist/components/web-components/' ) { |
| 69 | if ( empty( $components ) ) { |
| 70 | return; |
| 71 | } |
| 72 | |
| 73 | $names = $this->getFileNames( $components, $format ); |
| 74 | |
| 75 | if ( empty( $names ) ) { |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | foreach ( $names as $name ) { |
| 80 | echo "<link rel='modulepreload' href='" . esc_url( trailingslashit( PRESTO_PLAYER_PLUGIN_URL ) . trailingslashit( $path ) . $name ) . "' as='script' crossorigin />\n"; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Get the bundle stats file. |
| 86 | * |
| 87 | * @return object|false; |
| 88 | */ |
| 89 | protected function getStatsFile() { |
| 90 | if ( ! file_exists( $this->stats_file ) ) { |
| 91 | return false; |
| 92 | } |
| 93 | return wp_json_file_decode( $this->stats_file, array( 'associative' => true ) ); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Get the filenames from the stats. |
| 98 | * |
| 99 | * @param array $components An array of component names. |
| 100 | * @param string $format The format we are using. |
| 101 | * |
| 102 | * @return array |
| 103 | */ |
| 104 | public function getFileNames( $components, $format = 'esmBrowser' ) { |
| 105 | $json = $this->getStatsFile(); |
| 106 | $entries = $json['formats'][ $format ] ?? array(); |
| 107 | |
| 108 | $set = array_map( |
| 109 | function ( $element ) use ( $entries ) { |
| 110 | $files = array(); |
| 111 | $collection_bundles = array_filter( |
| 112 | $entries, |
| 113 | function ( $entry ) use ( $element ) { |
| 114 | return in_array( $element, $entry['components'], true ); |
| 115 | } |
| 116 | ); |
| 117 | |
| 118 | foreach ( $collection_bundles as $bundle ) { |
| 119 | $files = array_merge( array( $bundle['fileName'] ), $bundle['imports'] ); |
| 120 | } |
| 121 | |
| 122 | return $files; |
| 123 | }, |
| 124 | $components |
| 125 | ); |
| 126 | |
| 127 | return array_unique( Utility::flatten( $set ) ); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Add preload components. |
| 132 | * |
| 133 | * @param array $components Component names. |
| 134 | * |
| 135 | * @return void |
| 136 | */ |
| 137 | public function add( $components ) { |
| 138 | $this->components = array_filter( array_unique( array_merge( $this->components, $components ) ) ); |
| 139 | } |
| 140 | } |
| 141 |