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MDL-50891 useragent: Move web crawler checks to useragent class

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This commit is contained in:
Andrew Nicols 2015-08-05 15:20:23 +08:00
parent 6d392b3027
commit 34c6ec1869
6 changed files with 283 additions and 90 deletions
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24
lib/classes/useragent.php
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@ -71,7 +71,7 @@ class core_useragent {
self::DEVICETYPE_DEFAULT,
self::DEVICETYPE_LEGACY,
self::DEVICETYPE_MOBILE,
self::DEVICETYPE_TABLET
self::DEVICETYPE_TABLET,
);
/**
@ -201,6 +201,7 @@ class core_useragent {
/**
* Returns true if the user appears to be on a tablet.
*
* @return int
*/
protected function is_useragent_tablet() {
@ -208,6 +209,16 @@ class core_useragent {
return (preg_match($tabletregex, $this->useragent));
}
/**
* Whether the user agent relates to a web crawler.
* This includes all types of web crawler.
* @return bool
*/
protected function is_useragent_web_crawler() {
$regex = '/Googlebot|google\.com|Yahoo! Slurp|\[ZSEBOT\]|msnbot|bingbot|BingPreview|Yandex|AltaVista|Baiduspider|Teoma/';
return (preg_match($regex, $this->useragent));
}
/**
* Gets a list of known device types.
*
@ -926,4 +937,15 @@ class core_useragent {
// This browser does not support json.
return false;
}
/**
* Returns true if the client appears to be some kind of web crawler.
* This may include other types of crawler.
*
* @return bool
*/
public static function is_web_crawler() {
$instance = self::instance();
return (bool) $instance->is_useragent_web_crawler();
}
}