PreloadService.php — Presto Player 4.3.1

presto-player / inc / Services / PreloadService.php

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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