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| 1 | <?php |
| 2 | /** |
| 3 | * Class used to retrieve WAF stats |
| 4 | * |
| 5 | * @package automattic/jetpack-waf |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Waf; |
| 9 | |
| 10 | use Automattic\Jetpack\IP\Utils as IP_Utils; |
| 11 | |
| 12 | /** |
| 13 | * Retrieves WAF stats. |
| 14 | */ |
| 15 | class Waf_Stats { |
| 16 | |
| 17 | /** |
| 18 | * Retrieve blocked requests from database |
| 19 | * |
| 20 | * @return array |
| 21 | */ |
| 22 | public static function get_blocked_requests() { |
| 23 | return array( |
| 24 | 'current_day' => Waf_Blocklog_Manager::get_current_day_block_count(), |
| 25 | 'thirty_days' => Waf_Blocklog_Manager::get_thirty_days_block_counts(), |
| 26 | 'all_time' => Waf_Blocklog_Manager::get_all_time_block_count(), |
| 27 | ); |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * Get IP allow list count |
| 32 | * |
| 33 | * @return int The number of valid IP addresses in the allow list |
| 34 | * |
| 35 | * @deprecated 0.20.1 Use Automattic\Jetpack\Waf\Waf_Blocklog_Manager API instead. |
| 36 | */ |
| 37 | public static function get_ip_allow_list_count() { |
| 38 | _deprecated_function( __METHOD__, 'waf-0.20.1', 'Automattic\Jetpack\Waf\Waf_Blocklog_Manager' ); |
| 39 | |
| 40 | $ip_allow_list = get_option( Waf_Rules_Manager::IP_ALLOW_LIST_OPTION_NAME ); |
| 41 | |
| 42 | if ( ! $ip_allow_list ) { |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | $results = IP_Utils::get_ip_addresses_from_string( $ip_allow_list ); |
| 47 | |
| 48 | return count( $results ); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Get IP block list count |
| 53 | * |
| 54 | * @return int The number of valid IP addresses in the block list |
| 55 | * |
| 56 | * @deprecated 0.20.1 Use Automattic\Jetpack\Waf\Waf_Blocklog_Manager API instead. |
| 57 | */ |
| 58 | public static function get_ip_block_list_count() { |
| 59 | _deprecated_function( __METHOD__, 'waf-0.20.1', 'Automattic\Jetpack\Waf\Waf_Blocklog_Manager' ); |
| 60 | |
| 61 | $ip_block_list = get_option( Waf_Rules_Manager::IP_BLOCK_LIST_OPTION_NAME ); |
| 62 | |
| 63 | if ( ! $ip_block_list ) { |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | $results = IP_Utils::get_ip_addresses_from_string( $ip_block_list ); |
| 68 | |
| 69 | return count( $results ); |
| 70 | } |
| 71 | |
| 72 | /** The global stats cache |
| 73 | * |
| 74 | * @var array|null |
| 75 | */ |
| 76 | public static $global_stats = null; |
| 77 | |
| 78 | /** |
| 79 | * Get Rules version |
| 80 | * |
| 81 | * @return bool|string False if value is not found. The current stored rules version if cache is found. |
| 82 | * |
| 83 | * @deprecated 0.12.3 Use Automattic\Jetpack\Waf\Waf_Stats::get_automatic_rules_last_updated() to version the rules instead. |
| 84 | */ |
| 85 | public static function get_rules_version() { |
| 86 | _deprecated_function( __METHOD__, 'waf-0.12.3', 'Automattic\Jetpack\Waf\Waf_Stats::get_automatic_rules_last_updated' ); |
| 87 | |
| 88 | return get_option( Waf_Rules_Manager::VERSION_OPTION_NAME ); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Get Automatic Rules last updated timestamp |
| 93 | * |
| 94 | * @return bool|string False if value is not found. The timestamp the current stored rules was last updated if cache is found. |
| 95 | */ |
| 96 | public static function get_automatic_rules_last_updated() { |
| 97 | return get_option( Waf_Rules_Manager::AUTOMATIC_RULES_LAST_UPDATED_OPTION_NAME ); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Checks if the current cached global stats is expired and should be renewed |
| 102 | * |
| 103 | * @return boolean |
| 104 | */ |
| 105 | public static function is_global_stats_cache_expired() { |
| 106 | $option_timestamp = get_option( 'jetpack_protect_global_stats_timestamp' ); |
| 107 | |
| 108 | if ( ! $option_timestamp ) { |
| 109 | return true; |
| 110 | } |
| 111 | |
| 112 | return time() > (int) $option_timestamp; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Checks if we should consider the stored cache or bypass it |
| 117 | * |
| 118 | * @return boolean |
| 119 | */ |
| 120 | public static function should_use_global_stats_cache() { |
| 121 | return ! ( defined( 'JETPACK_PROTECT_DEV__BYPASS_CACHE' ) && JETPACK_PROTECT_DEV__BYPASS_CACHE ); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Get the global stats from the API endpoint |
| 126 | */ |
| 127 | public static function fetch_global_stats_from_api() { |
| 128 | $url = esc_url_raw( 'https://public-api.wordpress.com/wpcom/v2/jetpack-protect-global-stats' ); |
| 129 | $response = wp_remote_get( $url ); |
| 130 | |
| 131 | $response_code = wp_remote_retrieve_response_code( $response ); |
| 132 | |
| 133 | if ( is_wp_error( $response ) || 200 !== $response_code || empty( $response['body'] ) ) { |
| 134 | return new \WP_Error( 'failed_fetching_global_stats', 'Failed to fetch global stats data from the server', array( 'status' => $response_code ) ); |
| 135 | } |
| 136 | |
| 137 | $body = json_decode( wp_remote_retrieve_body( $response ) ); |
| 138 | |
| 139 | update_option( 'jetpack_protect_global_stats', maybe_serialize( $body ) ); |
| 140 | update_option( 'jetpack_protect_global_stats_timestamp', time() + 86400 ); // Caches expires after 24 hours. |
| 141 | |
| 142 | return $body; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Gets the current cached global stats |
| 147 | * |
| 148 | * @return bool|array False if value is not found. Array with values if cache is found. |
| 149 | */ |
| 150 | public static function get_global_stats_from_options() { |
| 151 | return maybe_unserialize( get_option( 'jetpack_protect_global_stats' ) ); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Get the global stats |
| 156 | * If the cache is expired, it will fetch the data from the API |
| 157 | * If the cache is not expired, it will return the cached data |
| 158 | * |
| 159 | * @param bool $refresh_from_wpcom Whether to refresh the data from the API. |
| 160 | * @return array|\WP_Error |
| 161 | */ |
| 162 | public static function get_global_stats( $refresh_from_wpcom = false ) { |
| 163 | if ( self::$global_stats !== null ) { |
| 164 | return self::$global_stats; |
| 165 | } |
| 166 | |
| 167 | if ( $refresh_from_wpcom || ! self::should_use_global_stats_cache() || self::is_global_stats_cache_expired() ) { |
| 168 | $global_stats = self::fetch_global_stats_from_api(); |
| 169 | } else { |
| 170 | $global_stats = self::get_global_stats_from_options(); |
| 171 | } |
| 172 | |
| 173 | // Ensure that $global_stats is of the correct type |
| 174 | if ( ( ! is_object( $global_stats ) && ! ( $global_stats instanceof \WP_Error ) ) ) { |
| 175 | return new \WP_Error( 'unexpected_type', 'Unexpected type or null returned for global stats' ); |
| 176 | } |
| 177 | |
| 178 | return $global_stats; |
| 179 | } |
| 180 | } |