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Dashboard
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 get_cdn_asset_cache_buster
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1<?php
2/**
3 * A class that adds a Blaze dashboard to wp-admin.
4 *
5 * @since 0.7.0
6 *
7 * @package automattic/jetpack-blaze
8 */
9
10namespace Automattic\Jetpack\Blaze;
11
12use Automattic\Jetpack\Assets;
13
14/**
15 * Responsible for adding a Blaze dashboard menu to wp-admin.
16 * The screen content itself is rendered remotely.
17 */
18class Dashboard {
19    /**
20     * Package version.
21     *
22     * @var string
23     */
24    const PACKAGE_VERSION = '0.27.4';
25
26    /**
27     * List of dependencies needed to render the dashboard in wp-admin.
28     *
29     * @var array
30     */
31    const JS_DEPENDENCIES = array( 'lodash', 'react', 'react-dom', 'wp-components', 'wp-compose', 'wp-i18n', 'wp-is-shallow-equal', 'wp-primitives', 'wp-url', 'moment' );
32
33    /**
34     * URL where we load the Blaze dashboard remotely.
35     *
36     * @var string
37     */
38    const CDN_URL = 'https://widgets.wp.com/blaze-dashboard/%s/%s';
39
40    /**
41     * Script handle for the JS file we enqueue in the dashboard page.
42     *
43     * @var string
44     */
45    const SCRIPT_HANDLE = 'jetpack-blaze-dashboard';
46
47    /**
48     * We bump the asset version when the Jetpack back end is not compatible anymore.
49     *
50     * @var string
51     */
52    const BLAZEDASH_VERSION = 'v1';
53
54    /**
55     * Cache key for the cache buster.
56     *
57     * @var string
58     */
59    const BLAZEDASH_CACHE_BUSTER_CACHE_KEY = 'jetpack_blaze_admin_asset_cache_buster';
60
61    /**
62     * Blaze dashboard admin page. Default is tools.php.
63     *
64     * @var string
65     */
66    private $admin_page;
67
68    /**
69     * Blaze dashboard menu slug. Default is 'advertising'.
70     *
71     * @var string
72     */
73    private $menu_slug;
74
75    /**
76     * Blaze dashboard css prefix. Default is 'jp-blaze'.
77     *
78     * @var string
79     */
80    private $css_prefix;
81
82    /**
83     * Dashboard constructor.
84     *
85     * @param string $admin_page Dashboard admin page. Default is tools.php.
86     * @param string $menu_slug Dashboard menu slug. Default is 'advertising'.
87     * @param string $css_prefix Dashboard css prefix. Default is 'jp-blaze'.
88     */
89    public function __construct( $admin_page = 'tools.php', $menu_slug = 'advertising', $css_prefix = 'jp-blaze' ) {
90        $this->admin_page = $admin_page;
91        $this->menu_slug  = $menu_slug;
92        $this->css_prefix = $css_prefix;
93    }
94
95    /**
96     * Override render funtion
97     *
98     * @return void
99     */
100    public function render() {
101        ?>
102        <div id="wpcom" class="<?php echo esc_attr( $this->css_prefix ); ?>-dashboard" style="min-height: calc(100vh - 100px);">
103        <div class="hide-if-js"><?php esc_html_e( 'Your Jetpack Blaze dashboard requires JavaScript to function properly.', 'jetpack-blaze' ); ?></div>
104            <div class="hide-if-no-js" style="height: 100%">
105                <img
106                    class="<?php echo esc_attr( $this->css_prefix ); ?>-dashboard-loading-spinner"
107                    width="32"
108                    height="32"
109                    style="position: absolute; left: 50%; top: 50%;"
110                    alt=<?php echo esc_attr( __( 'Loading', 'jetpack-blaze' ) ); ?>
111                    src="//en.wordpress.com/i/loading/loading-64.gif"
112                />
113            </div>
114        </div>
115        <script>
116            jQuery(document).ready(function($) {
117                // Load SVG sprite.
118                $.get("https://widgets.wp.com/blaze-dashboard/common/gridicons-506499ddac13811fee8e.svg", function(data) {
119                    var div = document.createElement("div");
120                    div.innerHTML = new XMLSerializer().serializeToString(data.documentElement);
121                    div.style = 'display: none';
122                    document.body.insertBefore(div, document.body.childNodes[0]);
123                });
124                // we intercept on all anchor tags and change it to hashbang style.
125                $("#wpcom").on('click', 'a', function (e) {
126                    const link = e && e.currentTarget && e.currentTarget.attributes && e.currentTarget.attributes.href && e.currentTarget.attributes.href.value;
127                    if (link && link.startsWith( '/<?php echo esc_attr( $this->menu_slug ); ?>' ) ) {
128                        location.hash = `#!${link}`;
129                        return false;
130                    }
131                });
132            });
133        </script>
134        <?php
135    }
136
137    /**
138     * Initialize the admin resources.
139     */
140    public function admin_init() {
141        add_action( 'admin_enqueue_scripts', array( $this, 'load_admin_scripts' ) );
142    }
143
144    /**
145     * Load the admin scripts.
146     *
147     * @param string $hook The current admin page.
148     */
149    public function load_admin_scripts( $hook ) {
150        if ( ! str_ends_with( $hook, 'page_' . $this->menu_slug ) ) {
151            return;
152        }
153
154        $asset_handle = self::SCRIPT_HANDLE;
155        $asset_name   = 'build.min';
156
157        $dashboard_config = new Dashboard_Config_Data( $this->admin_page, $this->menu_slug );
158
159        $config_data = $dashboard_config->get_data();
160
161        if ( file_exists( __DIR__ . "/../dist/{$asset_name}.js" ) ) {
162            // Load local assets for the convenience of development.
163            Assets::register_script(
164                $asset_handle,
165                "../dist/{$asset_name}.js",
166                __FILE__,
167                array(
168                    'enqueue'    => true,
169                    'in_footer'  => true,
170                    'textdomain' => 'jetpack-blaze',
171                )
172            );
173        } else {
174            $css_url    = $asset_name . ( is_rtl() ? '.rtl' : '' ) . '.css';
175            $css_handle = $asset_handle . '-style';
176
177            wp_enqueue_script(
178                $asset_handle,
179                sprintf( self::CDN_URL, self::BLAZEDASH_VERSION, "{$asset_name}.js" ),
180                self::JS_DEPENDENCIES,
181                $this->get_cdn_asset_cache_buster(),
182                true
183            );
184            wp_enqueue_style(
185                $css_handle,
186                sprintf( self::CDN_URL, self::BLAZEDASH_VERSION, $css_url ),
187                array(),
188                $this->get_cdn_asset_cache_buster()
189            );
190        }
191
192        wp_add_inline_script(
193            $asset_handle,
194            $dashboard_config->get_js_config_data( $config_data ),
195            'before'
196        );
197    }
198
199    /**
200     * Returns cache buster string for assets.
201     * Development mode doesn't need this, as it's handled by `Assets` class.
202     */
203    protected function get_cdn_asset_cache_buster() {
204        // Use cached cache buster in production.
205        $remote_asset_version = get_transient( self::BLAZEDASH_CACHE_BUSTER_CACHE_KEY );
206        if ( ! empty( $remote_asset_version ) ) {
207            return $remote_asset_version;
208        }
209
210        // If no cached cache buster, we fetch it from CDN and set to transient.
211        $response = wp_remote_get( sprintf( self::CDN_URL, self::BLAZEDASH_VERSION, 'build_meta.json' ), array( 'timeout' => 5 ) );
212
213        if ( is_wp_error( $response ) ) {
214            // fallback to the package version.
215            return self::PACKAGE_VERSION;
216        }
217
218        $build_meta = json_decode( wp_remote_retrieve_body( $response ), true );
219        if ( ! empty( $build_meta['cache_buster'] ) ) {
220            // Cache the cache buster for 15 mins.
221            set_transient( self::BLAZEDASH_CACHE_BUSTER_CACHE_KEY, $build_meta['cache_buster'], 15 * MINUTE_IN_SECONDS );
222            return $build_meta['cache_buster'];
223        }
224
225        // fallback to the package version.
226        return self::PACKAGE_VERSION;
227    }
228}