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1<?php
2
3namespace NewfoldLabs\WP\Module\Performance\Cache\Types;
4
5use NewfoldLabs\WP\Module\Performance\Cache\Purgeable;
6use NewfoldLabs\WP\ModuleLoader\Container;
7
8/**
9 * Cloudflare cache type.
10 */
11class Cloudflare extends CacheBase implements Purgeable {
12
13    /**
14     * Dependency injection container.
15     *
16     * @var Container
17     */
18    protected $container;
19
20    /**
21     * Cloudflare constructor.
22     *
23     * @param Container $container Dependency injection container.
24     */
25    public function __construct( Container $container ) {
26        $this->container = $container;
27    }
28
29    /**
30     * Whether or not the code for this cache type should be loaded.
31     *
32     * @param Container $container Method container.
33     * @return bool True if the cache type should be enabled, false otherwise.
34     */
35    public static function should_enable( Container $container ) {
36        return (bool) \get_option( 'endurance_cloudflare_enabled', false );
37    }
38
39    /**
40     * Check if Cloudflare is enabled.
41     *
42     * @return bool True if Cloudflare is enabled, false otherwise.
43     */
44    public function isCoudflareEnabled() {
45        return $this->getCloudflareTier() !== 0;
46    }
47
48    /**
49     * Get the Cloudflare tier.
50     *
51     * @return int|string The Cloudflare tier.
52     */
53    public function getCloudflareTier() {
54        $tier = \get_option( 'endurance_cloudflare_enabled', false );
55
56        if ( ! $tier ) {
57            return 0;
58        }
59
60        switch ( $tier ) {
61            case 'hostgator':
62                return 'hostgator';
63            case 'india':
64                return 'india';
65            case 'premium':
66                return 'premium';
67            default:
68                return 'basic';
69        }
70    }
71
72    /**
73     * Purge all Cloudflare cache.
74     */
75    public function purge_all() {
76        if ( $this->isCoudflareEnabled() ) {
77            $this->purgeRequest();
78        }
79    }
80
81    /**
82     * Purge a URL from Cloudflare cache.
83     *
84     * @param string $url URL to purge.
85     */
86    public function purge_url( $url ) {
87        if ( $this->isCoudflareEnabled() ) {
88            $this->purgeRequest( array( $url ) );
89        }
90    }
91
92    /**
93     * Purge multiple URLs from the Cloudflare cache.
94     *
95     * @link https://confluence.newfold.com/pages/viewpage.action?spaceKey=UDEV&title=Cache+Purge+API
96     *
97     * @param array $urls URLs to purge.
98     */
99    protected function purgeRequest( $urls = array() ) {
100        global $wp_version;
101
102        $queryString = http_build_query( array( 'cf' => $this->getCloudflareTier() ), '', '&' );
103        $host        = wp_parse_url( \home_url(), PHP_URL_HOST );
104
105        $plugin_brand   = $this->container->plugin()->get( 'id' );
106        $plugin_version = $this->container->plugin()->version;
107
108        $headerName = 'X-' . strtoupper( $plugin_brand ) . '-PLUGIN-PURGE';
109
110        $body = array(
111            'hosts' => array( $host ),
112        );
113
114        if ( $urls ) {
115            $body['assets'] = $urls;
116        }
117
118        $args = array(
119            'body'       => wp_json_encode( $body ),
120            'compress'   => true,
121            'headers'    => array(
122                $headerName    => 1,
123                'Content-Type' => 'application/json',
124            ),
125            'sslverify'  => false,
126            'user-agent' => "WordPress/{$wp_version}; {$host}; {$plugin_brand}/v{$plugin_version}",
127        );
128
129        // If WP_DEBUG is enabled, we want to wait for a response.
130        if ( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) {
131            $args['blocking'] = false;
132            $args['timeout']  = 0.01;
133        }
134
135        wp_remote_post( 'https://cachepurge.bluehost.com/v0/purge?' . $queryString, $args );
136    }
137}