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implement keyword filter for referer blacklist (closes #15)

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In addition to the pre-existing normal and regular expression filters a
keyword mode is added. This filter matches if the referer string
contains a given keyword (case insensitive).
This commit is contained in:
Stefan Kalscheuer
2019-03-12 19:37:22 +01:00
parent 0822537f0e
commit b7c3b51873
5 changed files with 174 additions and 47 deletions
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24
inc/class-statifyblacklist-admin.php
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@ -20,9 +20,6 @@ if ( ! defined( 'ABSPATH' ) ) {
* @since 1.0.0
*/
class StatifyBlacklist_Admin extends StatifyBlacklist {
const MODE_NORMAL = 0;
const MODE_REGEX = 1;
const MODE_REGEX_CI = 2;
/**
* Initialize admin-only components of the plugin.
@ -96,7 +93,7 @@ class StatifyBlacklist_Admin extends StatifyBlacklist {
'sanitized' => $sanitized_referer,
'diff' => array_diff( $given_referer, $sanitized_referer ),
],
'target' => [
'target' => [
'sanitized' => $sanitized_target,
'diff' => array_diff( $given_target, $sanitized_target ),
],
@ -334,4 +331,23 @@ class StatifyBlacklist_Admin extends StatifyBlacklist {
}
);
}
/**
* Validate regular expressions, i.e. remove duplicates and empty values and validate others.
*
* @since 1.5.0 #13
*
* @param array $expressions Given pre-sanitized array of regular expressions.
*
* @return array Array of invalid expressions.
*/
private static function sanitize_regex( $expressions ) {
return array_filter(
$expressions,
function ( $re ) {
// Check of preg_match() fails (warnings suppressed).
return false === @preg_match( $re, null );
}
);
}
}