wfActivityReport.php 20.4 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
<?php
if (defined('WORDFENCE_VERSION')) {

class wfActivityReport {
	const BLOCK_TYPE_COMPLEX = 'complex';
	const BLOCK_TYPE_BRUTE_FORCE = 'bruteforce';
	const BLOCK_TYPE_BLACKLIST = 'blacklist';

	/**
	 * @var int
	 */
	private $limit = 10;

	/**
	 * @var wpdb
	 */
	private $db;

	/**
	 * @param int $limit
	 */
	public function __construct($limit = 10) {
		global $wpdb;
		$this->db = $wpdb;
		$this->limit = $limit;
	}

	/**
	 * Schedule the activity report cron job.
	 */
	public static function scheduleCronJob() {
		self::clearCronJobs();

		if (!wfConfig::get('email_summary_enabled', 1)) {
			return;
		}

		if (is_main_site()) {
			list(, $end_time) = wfActivityReport::getReportDateRange();
			wp_schedule_single_event($end_time, 'wordfence_email_activity_report');
		}
	}

	/**
	 * Remove the activity report cron job.
	 */
	public static function disableCronJob() {
		self::clearCronJobs();
	}

	public static function clearCronJobs() {
		wp_clear_scheduled_hook('wordfence_email_activity_report');
	}

	/**
	 * Send out the report and reschedule the next report's cron job.
	 */
	public static function executeCronJob() {
		if (!wfConfig::get('email_summary_enabled', 1)) {
			return;
		}
		
		$emails = wfConfig::getAlertEmails();
		if (count($emails)) {
			$report = new self();
			$report->sendReportViaEmail($emails);
		}
		self::scheduleCronJob();
	}

	/**
	 * Output a compact version of the email for the WP dashboard.
	 */
	public static function outputDashboardWidget() {
		$report = new self(5);
		echo $report->toWidgetView();
	}

	/**
	 * @return array
	 */
	public static function getReportDateRange() {
		$interval = wfConfig::get('email_summary_interval', 'weekly');
		$offset = get_option('gmt_offset');
		return self::_getReportDateRange($interval, $offset);
	}

	/**
	 * Testable code.
	 *
	 * @param string $interval
	 * @param int    $offset
	 * @param null   $time
	 * @return array
	 */
	public static function _getReportDateRange($interval = 'weekly', $offset = 0, $time = null) {
		if ($time === null) {
			$time = time();
		}

		$day = (int) gmdate('w', $time);
		$month = (int) gmdate("n", $time);
		$day_of_month = (int) gmdate("j", $time);
		$year = (int) gmdate("Y", $time);

		$start_time = 0;
		$end_time = 0;

		switch ($interval) {
			// Send a report 4pm every day
			case 'daily':
				$start_time = gmmktime(16, 0, 0, $month, $day_of_month, $year) + (-$offset * 60 * 60);
				$end_time = $start_time + 86400;
				break;
			
			// Send a report 4pm every Monday
			case 'weekly':
				$start_time = gmmktime(16, 0, 0, $month, $day_of_month - $day + 1, $year) + (-$offset * 60 * 60);
				$end_time = $start_time + (86400 * 7);
				break;

			// Send a report at 4pm the first of every month
			case 'monthly':
				$start_time = gmmktime(16, 0, 0, $month, 1, $year) + (-$offset * 60 * 60);
				$end_time = gmmktime(16, 0, 0, $month + 1, 1, $year) + (-$offset * 60 * 60);
				break;
		}

		return array($start_time, $end_time);
	}

	/**
	 * @return int
	 */
	public static function getReportDateFrom() {
		$interval = wfConfig::get('email_summary_interval', 'weekly');
		return self::_getReportDateFrom($interval);
	}

	/**
	 * @param string $interval
	 * @param null   $time
	 * @return int
	 */
	public static function _getReportDateFrom($interval = 'weekly', $time = null) {
		if ($time === null) {
			$time = time();
		}

		// weekly
		$from = $time - (86400 * 7);
		switch ($interval) {
			case 'daily':
				$from = $time - 86400;
				break;

			// Send a report at 4pm the first of every month
			case 'monthly':
				$from = strtotime('-1 month', $time);
				break;
		}

		return $from;
	}

	/**
	 * @return array
	 */
	public function getFullReport() {
		$start_time = microtime(true);
		$remainder = 0;
		$recent_firewall_activity = $this->getRecentFirewallActivity($this->limit, $remainder);
		return array(
			'top_ips_blocked'          => $this->getTopIPsBlocked($this->limit),
			'top_countries_blocked'    => $this->getTopCountriesBlocked($this->limit),
			'top_failed_logins'        => $this->getTopFailedLogins($this->limit),
			'recent_firewall_activity' => $recent_firewall_activity,
			'omitted_firewall_activity'=> $remainder,
			'recently_modified_files'  => $this->getRecentFilesModified($this->limit),
			'updates_needed'           => $this->getUpdatesNeeded(),
			'microseconds'             => microtime(true) - $start_time,
		);
	}

	/**
	 * @return array
	 */
	public function getWidgetReport() {
		$start_time = microtime(true);
		return array(
			'top_ips_blocked'       => $this->getTopIPsBlocked($this->limit),
			'top_countries_blocked' => $this->getTopCountriesBlocked($this->limit),
			'top_failed_logins'     => $this->getTopFailedLogins($this->limit),
			'updates_needed'        => $this->getUpdatesNeeded(),
			'microseconds'          => microtime(true) - $start_time,
		);
	}
	
	public function getBlockedCount($maxAgeDays = null, $grouping = null) {
		$maxAgeDays = (int) $maxAgeDays;
		if ($maxAgeDays <= 0) {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 7 day)) / 86400)';
			switch (wfConfig::get('email_summary_interval', 'weekly')) {
				case 'daily':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 day)) / 86400)';
					break;
				case 'monthly':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 month)) / 86400)';
					break;
			}
		}
		else {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval ' . $maxAgeDays . ' day)) / 86400)';
		}
		
		//Possible values for blockType: throttle, manual, brute, fakegoogle, badpost, country, advanced, blacklist, waf
		$groupingWHERE = '';
		switch ($grouping) {
			case self::BLOCK_TYPE_COMPLEX:
				$groupingWHERE = ' AND blockType IN ("fakegoogle", "badpost", "country", "advanced", "waf")';
				break;
			case self::BLOCK_TYPE_BRUTE_FORCE:
				$groupingWHERE = ' AND blockType IN ("throttle", "brute")';
				break;
			case self::BLOCK_TYPE_BLACKLIST:
				$groupingWHERE = ' AND blockType IN ("blacklist", "manual")';
				break;
		}
		
		$table_wfBlockedIPLog = wfDB::networkTable('wfBlockedIPLog');
		$count = $this->db->get_var(<<<SQL
SELECT SUM(blockCount) as blockCount
FROM {$table_wfBlockedIPLog}
WHERE unixday >= {$interval}{$groupingWHERE}
SQL
			);
		return $count;
	}

	/**
	 * @param int $limit
	 * @return mixed
	 */
	public function getTopIPsBlocked($limit = 10, $maxAgeDays = null) {
		$maxAgeDays = (int) $maxAgeDays;
		if ($maxAgeDays <= 0) {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 7 day)) / 86400)';
			switch (wfConfig::get('email_summary_interval', 'weekly')) {
				case 'daily':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 day)) / 86400)';
					break;
				case 'monthly':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 month)) / 86400)';
					break;
			}
		}
		else {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval ' . $maxAgeDays . ' day)) / 86400)';
		}
		
		$table_wfBlockedIPLog = wfDB::networkTable('wfBlockedIPLog');
		$query=<<<SQL
SELECT IP, countryCode, unixday, blockType,
SUM(blockCount) as blockCount
FROM {$table_wfBlockedIPLog}
WHERE unixday >= {$interval}
GROUP BY IP
ORDER BY blockCount DESC
LIMIT %d
SQL;
		$results = $this->db->get_results($this->db->prepare($query, $limit));
		if ($results) {
			foreach ($results as &$row) {
				$row->countryName = $this->getCountryNameByCode($row->countryCode);
			}
		}
		return $results;
	}

	/**
	 * @param int $limit
	 * @return array
	 */
	public function getTopCountriesBlocked($limit = 10, $maxAgeDays = null) {
		$maxAgeDays = (int) $maxAgeDays;
		if ($maxAgeDays <= 0) {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 7 day)) / 86400)';
			switch (wfConfig::get('email_summary_interval', 'weekly')) {
				case 'daily':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 day)) / 86400)';
					break;
				case 'monthly':
					$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 month)) / 86400)';
					break;
			}
		}
		else {
			$interval = 'FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval ' . $maxAgeDays . ' day)) / 86400)';
		}
	  	
		$table_wfBlockedIPLog = wfDB::networkTable('wfBlockedIPLog');
		$query=<<<SQL
SELECT *, COUNT(IP) as totalIPs, SUM(ipBlockCount) as totalBlockCount
FROM (SELECT *, SUM(blockCount) AS ipBlockCount FROM {$table_wfBlockedIPLog} WHERE unixday >= {$interval} GROUP BY IP) t
GROUP BY countryCode
ORDER BY totalBlockCount DESC
LIMIT %d
SQL;
		$results = $this->db->get_results($this->db->prepare($query, $limit));
		if ($results) {
			foreach ($results as &$row) {
				$row->countryName = $this->getCountryNameByCode($row->countryCode);
			}
		}
		return $results;
	}

	/**
	 * @param int $limit
	 * @return mixed
	 */
	public function getTopFailedLogins($limit = 10) {
		$interval = 'UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 7 day))';
		switch (wfConfig::get('email_summary_interval', 'weekly')) {
			case 'daily':
				$interval = 'UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 day))';
				break;
			case 'monthly':
				$interval = 'UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 month))';
				break;
		}
	  
		$table_wfLogins = wfDB::networkTable('wfLogins');
		$failedLogins = $this->db->get_results($this->db->prepare(<<<SQL
SELECT wfl.*,
sum(wfl.fail) as fail_count
FROM {$table_wfLogins} wfl
WHERE wfl.fail = 1
AND wfl.ctime > $interval
GROUP BY wfl.username
ORDER BY fail_count DESC
LIMIT %d
SQL
			, $limit));
		
		foreach ($failedLogins as &$login) {
			$exists = $this->db->get_var($this->db->prepare(<<<SQL
SELECT !ISNULL(ID) FROM {$this->db->users} WHERE user_login = '%s' OR user_email = '%s'
SQL
			, $login->username, $login->username));
			$login->is_valid_user = $exists;
		}
		
		return $failedLogins;
	}

	/**
	 * Returns any updates needs or false if everything is up to date.
	 *
	 * @return array|bool
	 */
	public function getUpdatesNeeded($useCachedValued = true) {
		$update_check = new wfUpdateCheck();
		$needs_update = $update_check->checkAllUpdates($useCachedValued)
			->needsAnyUpdates();
		if ($needs_update) {
			return array(
				'core'    => $update_check->getCoreUpdateVersion(),
				'plugins' => $update_check->getPluginUpdates(),
				'themes'  => $update_check->getThemeUpdates(),
			);
		}
		return false;
	}

	/**
	 * Returns list of firewall activity up to $limit number of entries.
	 *
	 * @param int $limit Max events to return in results
	 * @param int $remainder
	 * @return array
	 */
	public function getRecentFirewallActivity($limit, &$remainder) {
		$dateRange = wfActivityReport::getReportDateRange();
		$recent_firewall_activity = new wfRecentFirewallActivity(null, max(604800, $dateRange[1] - $dateRange[0]));
		$recent_firewall_activity->run();
		return $recent_firewall_activity->mostRecentActivity($limit, $remainder);
	}

	/**
	 * Returns list of files modified within given timeframe.
	 *
	 * @todo Add option to configure the regex used to filter files allowed in this list.
	 * @todo Add option to exclude directories (such as cache directories).
	 *
	 * @param string $directory Search for files within this directory
	 * @param int    $time_range One week
	 * @param int    $limit Max files to return in results
	 * @param int    $directory_limit Hard limit for number of files to search within a directory.
	 * @return array
	 */
	public function getRecentFilesModified($limit = 300, $directory = ABSPATH, $time_range = 604800, $directory_limit = 20000) {
		$recently_modified = new wfRecentlyModifiedFiles($directory);
		$recently_modified->run();
		return $recently_modified->mostRecentFiles($limit);
	}

	/**
	 * Remove entries older than a month in the IP log.
	 */
	public function rotateIPLog() {
		$table_wfBlockedIPLog = wfDB::networkTable('wfBlockedIPLog');
		$this->db->query(<<<SQL
DELETE FROM {$table_wfBlockedIPLog}
WHERE unixday < FLOOR(UNIX_TIMESTAMP(DATE_SUB(NOW(), interval 1 month)) / 86400)
SQL
		);
	}

	/**
	 * @param mixed $ip_address
	 * @param int|null $unixday
	 */
	public static function logBlockedIP($ip_address, $unixday = null, $type = null) {
		/** @var wpdb $wpdb */
		global $wpdb;
		
		//Possible values for $type: throttle, manual, brute, fakegoogle, badpost, country, advanced, blacklist, waf

		if (wfUtils::isValidIP($ip_address)) {
			$ip_bin = wfUtils::inet_pton($ip_address);
		} else {
			$ip_bin = $ip_address;
			$ip_address = wfUtils::inet_ntop($ip_bin);
		}
		
		$blocked_table = wfDB::networkTable('wfBlockedIPLog');

		$unixday_insert = 'FLOOR(UNIX_TIMESTAMP() / 86400)';
		if (is_int($unixday)) {
			$unixday_insert = absint($unixday);
		}
		
		if ($type === null) {
			$type = 'generic';
		}

		$country = wfUtils::IP2Country($ip_address);

		$wpdb->query($wpdb->prepare(<<<SQL
INSERT INTO $blocked_table (IP, countryCode, blockCount, unixday, blockType)
VALUES (%s, %s, 1, $unixday_insert, %s)
ON DUPLICATE KEY UPDATE blockCount = blockCount + 1
SQL
			, $ip_bin, $country, $type));
	}

	/**
	 * @param $code
	 * @return string
	 */
	public function getCountryNameByCode($code) {
		static $wfBulkCountries;
		if (!isset($wfBulkCountries)) {
			include(dirname(__FILE__) . '/wfBulkCountries.php');
		}
		return array_key_exists($code, $wfBulkCountries) ? $wfBulkCountries[$code] : "";
	}

	/**
	 * @return wfActivityReportView
	 */
	public function toView() {
		return new wfActivityReportView('reports/activity-report', $this->getFullReport() + array(
				'limit' => $this->getLimit(),
			));
	}

	/**
	 * @return wfActivityReportView
	 */
	public function toWidgetView() {
		return new wfActivityReportView('reports/activity-report', $this->getWidgetReport() + array(
				'limit' => $this->getLimit(),
			));
	}

	/**
	 * @return wfActivityReportView
	 */
	public function toEmailView() {
		return new wfActivityReportView('reports/activity-report-email-inline', $this->getFullReport());
	}

	/**
	 * @param $email_addresses string|array
	 * @return bool
	 */
	public function sendReportViaEmail($email_addresses) {
		$shortSiteURL = preg_replace('/^https?:\/\//i', '', site_url());
		
		$content = $this->toEmailView()->__toString();
		
		$success = true;
		if (is_string($email_addresses)) { $email_addresses = explode(',', $email_addresses); }
		foreach ($email_addresses as $email) {
			$uniqueContent = str_replace('<!-- ##UNSUBSCRIBE## -->', wp_kses(sprintf(/* translators: URL to the WordPress admin panel. */ __('No longer an administrator for this site? <a href="%s" target="_blank">Click here</a> to stop receiving security alerts.', 'wordfence'), wfUtils::getSiteBaseURL() . '?_wfsf=removeAlertEmail&jwt=' . wfUtils::generateJWT(array('email' => $email))), array('a'=>array('href'=>array(), 'target'=>array()))), $content);
			if (!wp_mail($email, sprintf(/* translators: 1. Site URL. 2. Localized date. */ __('Wordfence activity for %1$s on %2$s', 'wordfence'), date_i18n(get_option('date_format')), $shortSiteURL), $uniqueContent, 'Content-Type: text/html')) {
				$success = false;
			}
		}
		
		return $success;
	}

	/**
	 * @return string
	 * @throws wfViewNotFoundException
	 */
	public function render() {
		return $this->toView()
			->render();
	}

	/**
	 * @return string
	 */
	public function __toString() {
		return $this->toView()
			->__toString();
	}

	/**
	 * @return int
	 */
	public function getLimit() {
		return $this->limit;
	}

	/**
	 * @param int $limit
	 */
	public function setLimit($limit) {
		$this->limit = $limit;
	}
}

class wfRecentFirewallActivity {
	private $activity = array();
	
	private $max_fetch = 2000;
	private $time_range = 604800;
	
	public function __construct($max_fetch = null, $time_range = null) {
		if ($max_fetch !== null) {
			$this->max_fetch = $max_fetch;
		}
		
		if ($time_range !== null) {
			$this->time_range = $time_range;
		}
	}
	
	public function run() {
		global $wpdb;
		
		$table_wfHits = wfDB::networkTable('wfHits');
		$results = $wpdb->get_results($wpdb->prepare(<<<SQL
SELECT attackLogTime, IP, URL, UA, actionDescription, actionData
FROM {$table_wfHits}
WHERE action = 'blocked:waf' AND attackLogTime > (UNIX_TIMESTAMP() - %d)
ORDER BY attackLogTime DESC
LIMIT %d
SQL
			, $this->time_range, $this->max_fetch));
		if ($results) {
			foreach ($results as &$row) {
				$actionData = json_decode($row->actionData, true);
				if (!is_array($actionData) || !isset($actionData['paramKey']) || !isset($actionData['paramValue'])) {
					continue;
				}
				
				if (isset($actionData['failedRules']) && $actionData['failedRules'] == 'blocked') {
					$row->longDescription = __("Blocked because the IP is blocklisted", 'wordfence');
				}
				else {
					$row->longDescription = sprintf(__("Blocked for %s", 'wordfence'), $row->actionDescription);
				}
				
				$paramKey = base64_decode($actionData['paramKey']);
				$paramValue = base64_decode($actionData['paramValue']);
				if (strlen($paramValue) > 100) {
					$paramValue = substr($paramValue, 0, 100) . '...';
				}
				
				if (preg_match('/([a-z0-9_]+\.[a-z0-9_]+)(?:\[(.+?)\](.*))?/i', $paramKey, $matches)) {
					switch ($matches[1]) {
						case 'request.queryString':
							$row->longDescription = sprintf(__('Blocked for %1$s in query string: %2$s = %3$s', 'wordfence'), $row->actionDescription, $matches[2], $paramValue);
							break;
						case 'request.body':
							$row->longDescription = sprintf(__('Blocked for %1$s in POST body: %2$s = %3$s', 'wordfence'), $row->actionDescription, $matches[2], $paramValue);
							break;
						case 'request.cookie':
							$row->longDescription = sprintf(__('Blocked for %1$s in cookie: %2$s = %3$s', 'wordfence'), $row->actionDescription, $matches[2], $paramValue);
							break;
						case 'request.fileNames':
							$row->longDescription = sprintf(__('Blocked for %1$s in file: %2$s = %3$s', 'wordfence'), $row->actionDescription, $matches[2], $paramValue);
							break;
					}
				}
			}
		}
		
		$this->activity = $results;
	}
	
	public function mostRecentActivity($limit, &$remainder = null) {
		if ($remainder !== null) {
			$remainder = count($this->activity) - $limit;
		}
		return array_slice($this->activity, 0, $limit);
	}
}

class wfRecentlyModifiedFiles extends wfDirectoryIterator {

	/**
	 * @var int
	 */
	private $time_range = 604800;

	/**
	 * @var array
	 */
	private $files = array();
	private $excluded_directories;

	/**
	 * @param string $directory
	 * @param int    $max_files_per_directory
	 * @param int    $max_iterations
	 * @param int    $time_range
	 */
	public function __construct($directory = ABSPATH, $max_files_per_directory = 20000, $max_iterations = 250000, $time_range = 604800) {
		parent::__construct($directory, $max_files_per_directory, $max_iterations);
		$this->time_range = $time_range;
		$excluded_directories = explode("\n", wfUtils::cleanupOneEntryPerLine(wfConfig::get('email_summary_excluded_directories', '')));
		$this->excluded_directories = array();
		foreach ($excluded_directories  as $index => $path) {
			if (($dir = realpath(ABSPATH . $path)) !== false) {
				$this->excluded_directories[$dir] = 1;
			}
		}
	}

	/**
	 * @param $dir
	 * @return bool
	 */
	protected function scan($dir) {
		if (!array_key_exists(realpath($dir), $this->excluded_directories)) {
			return parent::scan($dir);
		}
		return true;
	}


	/**
	 * @param string $file
	 */
	public function file($file) {
		$mtime = filemtime($file);
		if (time() - $mtime < $this->time_range) {
			$this->files[] = array($file, $mtime);
		}
	}

	/**
	 * @param int $limit
	 * @return array
	 */
	public function mostRecentFiles($limit = 300) {
		usort($this->files, array(
			$this,
			'_sortMostRecentFiles',
		));
		return array_slice($this->files, 0, $limit);
	}

	/**
	 * Sort in descending order.
	 *
	 * @param $a
	 * @param $b
	 * @return int
	 */
	private function _sortMostRecentFiles($a, $b) {
		if ($a[1] > $b[1]) {
			return -1;
		}
		if ($a[1] < $b[1]) {
			return 1;
		}
		return 0;
	}

	/**
	 * @return mixed
	 */
	public function getFiles() {
		return $this->files;
	}
}


class wfActivityReportView extends wfView {

	/**
	 * @param $file
	 * @return string
	 */
	public function displayFile($file) {
		$realPath = realpath($file);
		if (stripos($realPath, ABSPATH) === 0) {
			return substr($realPath, strlen(ABSPATH));
		}
		return $realPath;
	}

	/**
	 * @param null $unix_time
	 * @return string
	 */
	public function modTime($unix_time = null) {
		if ($unix_time === null) {
			$unix_time = time();
		}
		return wfUtils::formatLocalTime('F j, Y g:ia', $unix_time);
	}
	
	public function attackTime($unix_time = null) {
		if ($unix_time === null) {
			$unix_time = time();
		}
		return wfUtils::formatLocalTime('F j, Y', $unix_time) . "<br>" . wfUtils::formatLocalTime('g:ia', $unix_time);
	}
	
	public function displayIP($binaryIP) {
		$readableIP = wfUtils::inet_ntop($binaryIP);
		$country = wfUtils::countryCode2Name(wfUtils::IP2Country($readableIP));
		return "{$readableIP} (" . ($country ? $country : __('Unknown', 'wordfence')) . ")";
	}
}
}