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6
1<?php
2/**
3 * WordPress Site Health integration for the Jetpack Connection package.
4 *
5 * @package automattic/jetpack-connection
6 */
7
8namespace Automattic\Jetpack\Connection;
9
10/**
11 * Integrates connection health tests into WordPress Site Health.
12 *
13 * This class defers to the Jetpack plugin's own debugger integration when it
14 * is present (old Jetpack versions). When no legacy integration is detected,
15 * it registers the connection health tests directly.
16 *
17 * @since 8.5.0
18 */
19class Site_Health {
20
21    /**
22     * Whether the class has been initialized.
23     *
24     * @var bool
25     */
26    private static $initialized = false;
27
28    /**
29     * Initialize Site Health integration.
30     *
31     * Should be called once, typically from the package's actions.php via a plugins_loaded hook.
32     *
33     * @since 8.5.0
34     */
35    public static function init() {
36        if ( self::$initialized ) {
37            return;
38        }
39        self::$initialized = true;
40
41        add_action( 'admin_init', array( __CLASS__, 'maybe_register_site_health' ), 1 );
42
43        // Deliberately hooked to the cron-only `jetpack_heartbeat` action (end of
44        // Heartbeat::cron_exec()) and not `jetpack_heartbeat_stats_array`, which
45        // also fires in synchronous request contexts (XML-RPC, REST, WP-CLI) where
46        // a remote test would be slow and an amplification vector.
47        add_action( 'jetpack_heartbeat', array( __CLASS__, 'do_daily_connection_check' ) );
48    }
49
50    /**
51     * Runs the WP.com connection test once a day on the heartbeat cron.
52     *
53     * The test result itself is discarded: the point is the test's side effects,
54     * which keep the Error_Handler state for failures that WP.com cannot report
55     * through a request of its own (the site blocking WP.com requests; the site's
56     * SSL certificate failing verification) fresh — reported while the condition
57     * persists, cleared once it resolves. Without this, the errors would only
58     * update on Site Health page visits and Core's weekly Site Health cron, and
59     * would expire (ERROR_LIFE_TIME) while still unresolved.
60     *
61     * @since 8.10.0
62     */
63    public static function do_daily_connection_check() {
64        if ( ! ( new Manager() )->is_connected() ) {
65            return;
66        }
67
68        ( new Connection_Health_Tests() )->run_test( 'test__wpcom_connection_test' );
69    }
70
71    /**
72     * Conditionally register Site Health hooks.
73     *
74     * Checks whether the legacy Jetpack debugger has already registered its
75     * Site Health hooks. If so, we defer to avoid duplicate tests.
76     *
77     * @since 8.5.0
78     */
79    public static function maybe_register_site_health() {
80        // Defer to the old Jetpack plugin's debugger if it has already registered
81        // its Site Health filter. Old Jetpack versions add this filter during plugin
82        // loading, so by admin_init it is already present.
83        if ( has_filter( 'site_status_tests', 'jetpack_debugger_site_status_tests' ) ) {
84            return;
85        }
86
87        add_filter( 'site_status_tests', array( __CLASS__, 'register_site_health_tests' ) );
88        add_action( 'wp_ajax_health-check-jetpack-connection-health', array( __CLASS__, 'ajax_local_testing_suite' ) );
89    }
90
91    /**
92     * Register connection tests with WordPress Site Health.
93     *
94     * @since 8.5.0
95     *
96     * @param array $core_tests Array of tests from Core's Site Health.
97     *
98     * @return array Modified array of tests.
99     */
100    public static function register_site_health_tests( $core_tests ) {
101        $cxn_tests = new Connection_Health_Tests();
102        $tests     = $cxn_tests->list_tests( 'direct' );
103
104        foreach ( $tests as $test ) {
105            $core_tests['direct'][ $test['name'] ] = array(
106                'label' => __( 'Jetpack: ', 'jetpack-connection' ) . $test['name'],
107                'test'  => self::make_site_health_callback( $test, $cxn_tests ),
108            );
109        }
110
111        $core_tests['async']['jetpack_connection_test_suite'] = array(
112            'label' => __( 'Jetpack Connection Tests', 'jetpack-connection' ),
113            'test'  => 'jetpack-connection-health',
114        );
115
116        return $core_tests;
117    }
118
119    /**
120     * Human-readable headings for the built-in connection tests.
121     *
122     * Used when a test result carries no label of its own, so Site Health does not
123     * derive a title from the method name (e.g. "Wpcom Connection Test").
124     *
125     * A heading here has to read sensibly for a pass, a fail, and a skip alike, so
126     * these name what was tested rather than stating an outcome. Results that want
127     * to state an outcome set their own label, which takes precedence.
128     *
129     * @since 9.4.0
130     *
131     * @return array Map of test name => label.
132     */
133    private static function get_default_test_labels() {
134        return array(
135            'test__blog_token_if_exists'           => __( 'Site Token', 'jetpack-connection' ),
136            'test__check_if_connected'             => __( 'WordPress.com Connection', 'jetpack-connection' ),
137            'test__master_user_exists_on_site'     => __( 'Connection Owner', 'jetpack-connection' ),
138            'test__master_user_can_manage_options' => __( 'Connection Owner Permissions', 'jetpack-connection' ),
139            'test__identity_crisis'                => __( 'Site Address', 'jetpack-connection' ),
140            'test__connection_token_health'        => __( 'Connection Tokens', 'jetpack-connection' ),
141            'test__wpcom_connection_test'          => __( 'Requests from WordPress.com', 'jetpack-connection' ),
142            // Only registered when the jetpack_debugger_run_self_test filter returns true.
143            'test__wpcom_self_test'                => __( 'Site XML-RPC Endpoint', 'jetpack-connection' ),
144            'test__server_port_value'              => __( 'Server Port', 'jetpack-connection' ),
145            'test__xml_parser_available'           => __( 'PHP XML Support', 'jetpack-connection' ),
146        );
147    }
148
149    /**
150     * Get the heading for a test whose result carries no label of its own.
151     *
152     * Falls back to deriving a title from the method name, which is the last resort
153     * for tests other plugins register through the jetpack_connection_tests_loaded
154     * action and which therefore cannot appear in the map.
155     *
156     * @since 9.4.0
157     *
158     * @param string $test_name Test name, e.g. "test__blog_token_if_exists".
159     *
160     * @return string The heading to display.
161     */
162    private static function get_default_test_label( $test_name ) {
163        $labels = self::get_default_test_labels();
164
165        if ( isset( $labels[ $test_name ] ) ) {
166            return $labels[ $test_name ];
167        }
168
169        return ucwords(
170            str_replace(
171                '_',
172                ' ',
173                str_replace( 'test__', '', $test_name )
174            )
175        );
176    }
177
178    /**
179     * Create a closure for a Site Health direct test.
180     *
181     * @since 8.5.0
182     *
183     * @param array                   $test      Test definition array.
184     * @param Connection_Health_Tests $cxn_tests Test suite instance.
185     *
186     * @return callable The Site Health test callback.
187     */
188    private static function make_site_health_callback( $test, $cxn_tests ) {
189        $default_label = self::get_default_test_label( $test['name'] );
190
191        return function () use ( $test, $cxn_tests, $default_label ) {
192            $results = $cxn_tests->run_test( $test['name'] );
193            if ( is_wp_error( $results ) ) {
194                return;
195            }
196
197            $label = $results['label'] ? $results['label'] : $default_label;
198
199            if ( $results['long_description'] ) {
200                $description = $results['long_description'];
201            } elseif ( $results['short_description'] ) {
202                $description = sprintf(
203                    '<p>%s</p>',
204                    $results['short_description']
205                );
206            } else {
207                $description = sprintf(
208                    '<p>%s</p>',
209                    __( 'This test successfully passed!', 'jetpack-connection' )
210                );
211            }
212
213            $badge_label = $cxn_tests->get_site_health_badge_label();
214
215            $return = array(
216                'label'       => $label,
217                'status'      => 'good',
218                'badge'       => array(
219                    'label' => $badge_label,
220                    'color' => 'green',
221                ),
222                'description' => $description,
223                'actions'     => '',
224                'test'        => 'jetpack_' . $test['name'],
225            );
226
227            if ( false === $results['pass'] ) {
228                $return['status'] = $results['severity'];
229                if ( ! empty( $results['action'] ) ) {
230                    $return['actions'] = sprintf(
231                        '<a href="%1$s" target="_blank" rel="noopener noreferrer">%2$s <span class="screen-reader-text">%3$s</span><span aria-hidden="true" class="dashicons dashicons-external"></span></a>',
232                        esc_url( $results['action'] ),
233                        $results['action_label'],
234                        /* translators: accessibility text */
235                        __( '(opens in a new tab)', 'jetpack-connection' )
236                    );
237                }
238            }
239
240            return $return;
241        };
242    }
243
244    /**
245     * AJAX handler for async Site Health tests.
246     *
247     * @since 8.5.0
248     */
249    public static function ajax_local_testing_suite() {
250        check_ajax_referer( 'health-check-site-status' );
251        if ( ! current_user_can( 'manage_options' ) ) {
252            // @phan-suppress-next-line PhanTypeMismatchArgumentProbablyReal
253            wp_send_json_error( null, null, JSON_UNESCAPED_SLASHES );
254        }
255        $tests = new Connection_Health_Tests();
256        // @phan-suppress-next-line PhanTypeMismatchArgumentProbablyReal
257        wp_send_json_success( $tests->output_results_for_core_async_site_health(), null, JSON_UNESCAPED_SLASHES );
258    }
259}