mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/AbuseFilter.git
synced 2024-11-29 00:10:26 +00:00
284ab234fd
This feature was never implemented. I'm not sure whether we need a way to compare array and other types of variables (left as ToDo), since e.g. in PHP it's always false. Bug: T179238 Change-Id: I5d2c33fd117e69cbc84c0b04b6cb82edbdcadf16
484 lines
11 KiB
PHP
484 lines
11 KiB
PHP
<?php
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class AFPData {
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// Datatypes
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const DINT = 'int';
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const DSTRING = 'string';
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const DNULL = 'null';
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const DBOOL = 'bool';
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const DFLOAT = 'float';
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const DLIST = 'list';
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// Translation table mapping shell-style wildcards to PCRE equivalents.
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// Derived from <http://www.php.net/manual/en/function.fnmatch.php#100207>
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private static $wildcardMap = [
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'\*' => '.*',
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'\+' => '\+',
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'\-' => '\-',
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'\.' => '\.',
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'\?' => '.',
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'\[' => '[',
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'\[\!' => '[^',
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'\\' => '\\\\',
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'\]' => ']',
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];
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public $type;
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public $data;
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/**
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* @param string $type
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* @param null $val
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*/
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public function __construct( $type = self::DNULL, $val = null ) {
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$this->type = $type;
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$this->data = $val;
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}
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/**
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* @param mixed $var
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* @return AFPData
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* @throws AFPException
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*/
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public static function newFromPHPVar( $var ) {
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if ( is_string( $var ) ) {
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return new AFPData( self::DSTRING, $var );
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} elseif ( is_int( $var ) ) {
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return new AFPData( self::DINT, $var );
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} elseif ( is_float( $var ) ) {
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return new AFPData( self::DFLOAT, $var );
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} elseif ( is_bool( $var ) ) {
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return new AFPData( self::DBOOL, $var );
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} elseif ( is_array( $var ) ) {
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$result = [];
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foreach ( $var as $item ) {
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$result[] = self::newFromPHPVar( $item );
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}
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return new AFPData( self::DLIST, $result );
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} elseif ( is_null( $var ) ) {
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return new AFPData();
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} else {
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throw new AFPException(
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'Data type ' . gettype( $var ) . ' is not supported by AbuseFilter'
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);
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}
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}
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/**
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* @return AFPData
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*/
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public function dup() {
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return new AFPData( $this->type, $this->data );
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}
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/**
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* @param AFPData $orig
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* @param string $target
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* @return AFPData
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*/
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public static function castTypes( $orig, $target ) {
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if ( $orig->type == $target ) {
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return $orig->dup();
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}
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if ( $target == self::DNULL ) {
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return new AFPData();
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}
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if ( $orig->type == self::DLIST ) {
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if ( $target == self::DBOOL ) {
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return new AFPData( self::DBOOL, (bool)count( $orig->data ) );
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}
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if ( $target == self::DFLOAT ) {
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return new AFPData( self::DFLOAT, floatval( count( $orig->data ) ) );
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}
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if ( $target == self::DINT ) {
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return new AFPData( self::DINT, intval( count( $orig->data ) ) );
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}
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if ( $target == self::DSTRING ) {
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$s = '';
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foreach ( $orig->data as $item ) {
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$s .= $item->toString() . "\n";
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}
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return new AFPData( self::DSTRING, $s );
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}
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}
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if ( $target == self::DBOOL ) {
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return new AFPData( self::DBOOL, (bool)$orig->data );
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}
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if ( $target == self::DFLOAT ) {
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return new AFPData( self::DFLOAT, floatval( $orig->data ) );
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}
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if ( $target == self::DINT ) {
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return new AFPData( self::DINT, intval( $orig->data ) );
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}
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if ( $target == self::DSTRING ) {
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return new AFPData( self::DSTRING, strval( $orig->data ) );
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}
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if ( $target == self::DLIST ) {
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return new AFPData( self::DLIST, [ $orig ] );
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}
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}
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/**
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* @param AFPData $value
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* @return AFPData
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*/
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public static function boolInvert( $value ) {
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return new AFPData( self::DBOOL, !$value->toBool() );
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}
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/**
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* @param AFPData $base
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* @param AFPData $exponent
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* @return AFPData
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*/
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public static function pow( $base, $exponent ) {
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return new AFPData( self::DFLOAT, pow( $base->toFloat(), $exponent->toFloat() ) );
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @return AFPData
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*/
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public static function keywordIn( $a, $b ) {
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$a = $a->toString();
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$b = $b->toString();
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if ( $a == '' || $b == '' ) {
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return new AFPData( self::DBOOL, false );
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}
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return new AFPData( self::DBOOL, strpos( $b, $a ) !== false );
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @return AFPData
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*/
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public static function keywordContains( $a, $b ) {
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$a = $a->toString();
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$b = $b->toString();
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if ( $a == '' || $b == '' ) {
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return new AFPData( self::DBOOL, false );
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}
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return new AFPData( self::DBOOL, strpos( $a, $b ) !== false );
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}
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/**
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* @param string $value
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* @param mixed $list
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* @return bool
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*/
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public static function listContains( $value, $list ) {
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// Should use built-in PHP function somehow
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foreach ( $list->data as $item ) {
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if ( self::equals( $value, $item ) ) {
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return true;
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}
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}
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return false;
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}
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/**
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* @ToDo Should we also build a proper system to compare arrays with different types?
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* @param AFPData $d1
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* @param AFPData $d2
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* @param bool $strict whether to also check types
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* @return bool
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*/
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public static function equals( $d1, $d2, $strict = false ) {
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if ( $d1->type != self::DLIST && $d2->type != self::DLIST ) {
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$typecheck = $d1->type == $d2->type || !$strict;
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return $typecheck && $d1->toString() === $d2->toString();
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} elseif ( $d1->type == self::DLIST && $d2->type == self::DLIST ) {
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$data1 = $d1->data;
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$data2 = $d2->data;
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if ( count( $data1 ) !== count( $data2 ) ) {
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return false;
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}
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$length = count( $data1 );
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for ( $i = 0; $i < $length; $i++ ) {
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$result = self::equals( $data1[$i], $data2[$i], $strict );
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if ( $result === false ) {
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return false;
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}
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}
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return true;
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} else {
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// Trying to compare an array to something else
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return false;
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}
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}
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/**
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* @param AFPData $str
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* @param AFPData $pattern
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* @return AFPData
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*/
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public static function keywordLike( $str, $pattern ) {
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$str = $str->toString();
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$pattern = '#^' . strtr( preg_quote( $pattern->toString(), '#' ), self::$wildcardMap ) . '$#u';
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Wikimedia\suppressWarnings();
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$result = preg_match( $pattern, $str );
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Wikimedia\restoreWarnings();
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return new AFPData( self::DBOOL, (bool)$result );
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}
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/**
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* @param AFPData $str
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* @param AFPData $regex
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* @param int $pos
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* @param bool $insensitive
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* @return AFPData
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* @throws Exception
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*/
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public static function keywordRegex( $str, $regex, $pos, $insensitive = false ) {
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$str = $str->toString();
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$pattern = $regex->toString();
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$pattern = preg_replace( '!(\\\\\\\\)*(\\\\)?/!', '$1\/', $pattern );
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$pattern = "/$pattern/u";
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if ( $insensitive ) {
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$pattern .= 'i';
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}
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Wikimedia\suppressWarnings();
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$result = preg_match( $pattern, $str );
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Wikimedia\restoreWarnings();
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if ( $result === false ) {
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throw new AFPUserVisibleException(
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'regexfailure',
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$pos,
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[ 'unspecified error in preg_match()', $pattern ]
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);
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}
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return new AFPData( self::DBOOL, (bool)$result );
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}
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/**
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* @param string $str
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* @param string $regex
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* @param int $pos
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* @return AFPData
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*/
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public static function keywordRegexInsensitive( $str, $regex, $pos ) {
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return self::keywordRegex( $str, $regex, $pos, true );
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}
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/**
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* @param AFPData $data
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* @return AFPData
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*/
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public static function unaryMinus( $data ) {
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if ( $data->type == self::DINT ) {
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return new AFPData( $data->type, -$data->toInt() );
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} else {
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return new AFPData( $data->type, -$data->toFloat() );
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}
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @param string $op
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* @return AFPData
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* @throws AFPException
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*/
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public static function boolOp( $a, $b, $op ) {
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$a = $a->toBool();
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$b = $b->toBool();
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if ( $op == '|' ) {
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return new AFPData( self::DBOOL, $a || $b );
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}
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if ( $op == '&' ) {
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return new AFPData( self::DBOOL, $a && $b );
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}
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if ( $op == '^' ) {
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return new AFPData( self::DBOOL, $a xor $b );
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}
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throw new AFPException( "Invalid boolean operation: {$op}" ); // Should never happen.
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @param string $op
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* @return AFPData
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* @throws AFPException
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*/
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public static function compareOp( $a, $b, $op ) {
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if ( $op == '==' || $op == '=' ) {
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return new AFPData( self::DBOOL, self::equals( $a, $b ) );
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}
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if ( $op == '!=' ) {
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return new AFPData( self::DBOOL, !self::equals( $a, $b ) );
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}
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if ( $op == '===' ) {
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return new AFPData( self::DBOOL, self::equals( $a, $b, true ) );
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}
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if ( $op == '!==' ) {
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return new AFPData( self::DBOOL, !self::equals( $a, $b, true ) );
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}
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$a = $a->toString();
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$b = $b->toString();
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if ( $op == '>' ) {
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return new AFPData( self::DBOOL, $a > $b );
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}
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if ( $op == '<' ) {
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return new AFPData( self::DBOOL, $a < $b );
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}
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if ( $op == '>=' ) {
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return new AFPData( self::DBOOL, $a >= $b );
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}
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if ( $op == '<=' ) {
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return new AFPData( self::DBOOL, $a <= $b );
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}
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throw new AFPException( "Invalid comparison operation: {$op}" ); // Should never happen
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @param string $op
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* @param int $pos
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* @return AFPData
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* @throws AFPUserVisibleException
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* @throws AFPException
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*/
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public static function mulRel( $a, $b, $op, $pos ) {
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// Figure out the type.
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if ( $a->type == self::DFLOAT || $b->type == self::DFLOAT ||
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$a->toFloat() != $a->toString() || $b->toFloat() != $b->toString()
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) {
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$type = self::DFLOAT;
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$a = $a->toFloat();
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$b = $b->toFloat();
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} else {
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$type = self::DINT;
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$a = $a->toInt();
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$b = $b->toInt();
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}
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if ( $op != '*' && $b == 0 ) {
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throw new AFPUserVisibleException( 'dividebyzero', $pos, [ $a ] );
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}
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if ( $op == '*' ) {
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$data = $a * $b;
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} elseif ( $op == '/' ) {
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$data = $a / $b;
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} elseif ( $op == '%' ) {
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$data = $a % $b;
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} else {
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// Should never happen
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throw new AFPException( "Invalid multiplication-related operation: {$op}" );
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}
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if ( $type == self::DINT ) {
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$data = intval( $data );
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} else {
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$data = floatval( $data );
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}
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return new AFPData( $type, $data );
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @return AFPData
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*/
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public static function sum( $a, $b ) {
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if ( $a->type == self::DSTRING || $b->type == self::DSTRING ) {
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return new AFPData( self::DSTRING, $a->toString() . $b->toString() );
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} elseif ( $a->type == self::DLIST && $b->type == self::DLIST ) {
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return new AFPData( self::DLIST, array_merge( $a->toList(), $b->toList() ) );
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} else {
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return new AFPData( self::DFLOAT, $a->toFloat() + $b->toFloat() );
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}
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}
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/**
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* @param AFPData $a
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* @param AFPData $b
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* @return AFPData
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*/
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public static function sub( $a, $b ) {
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return new AFPData( self::DFLOAT, $a->toFloat() - $b->toFloat() );
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}
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/** Convert shorteners */
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/**
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* @throws MWException
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* @return mixed
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*/
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public function toNative() {
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switch ( $this->type ) {
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case self::DBOOL:
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return $this->toBool();
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case self::DSTRING:
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return $this->toString();
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case self::DFLOAT:
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return $this->toFloat();
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case self::DINT:
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return $this->toInt();
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case self::DLIST:
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$input = $this->toList();
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$output = [];
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foreach ( $input as $item ) {
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$output[] = $item->toNative();
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}
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return $output;
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case self::DNULL:
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return null;
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default:
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throw new MWException( "Unknown type" );
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}
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}
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/**
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* @return bool
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*/
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public function toBool() {
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return self::castTypes( $this, self::DBOOL )->data;
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}
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/**
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* @return string
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*/
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public function toString() {
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return self::castTypes( $this, self::DSTRING )->data;
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}
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/**
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* @return float
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*/
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public function toFloat() {
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return self::castTypes( $this, self::DFLOAT )->data;
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}
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/**
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* @return int
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*/
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public function toInt() {
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return self::castTypes( $this, self::DINT )->data;
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}
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public function toList() {
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return self::castTypes( $this, self::DLIST )->data;
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}
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}
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