--- /dev/null
+<?php
+
+/**
+ * See docs/magicword.txt.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Parser
+ */
+
+use MediaWiki\Logger\LoggerFactory;
+
+/**
+ * Class for handling an array of magic words
+ * @ingroup Parser
+ */
+class MagicWordArray {
+ /** @var array */
+ public $names = [];
+
+ /** @var array */
+ private $hash;
+
+ private $baseRegex;
+
+ private $regex;
+
+ /**
+ * @param array $names
+ */
+ public function __construct( $names = [] ) {
+ $this->names = $names;
+ }
+
+ /**
+ * Add a magic word by name
+ *
+ * @param string $name
+ */
+ public function add( $name ) {
+ $this->names[] = $name;
+ $this->hash = $this->baseRegex = $this->regex = null;
+ }
+
+ /**
+ * Add a number of magic words by name
+ *
+ * @param array $names
+ */
+ public function addArray( $names ) {
+ $this->names = array_merge( $this->names, array_values( $names ) );
+ $this->hash = $this->baseRegex = $this->regex = null;
+ }
+
+ /**
+ * Get a 2-d hashtable for this array
+ * @return array
+ */
+ public function getHash() {
+ if ( is_null( $this->hash ) ) {
+ global $wgContLang;
+ $this->hash = [ 0 => [], 1 => [] ];
+ foreach ( $this->names as $name ) {
+ $magic = MagicWord::get( $name );
+ $case = intval( $magic->isCaseSensitive() );
+ foreach ( $magic->getSynonyms() as $syn ) {
+ if ( !$case ) {
+ $syn = $wgContLang->lc( $syn );
+ }
+ $this->hash[$case][$syn] = $name;
+ }
+ }
+ }
+ return $this->hash;
+ }
+
+ /**
+ * Get the base regex
+ * @return array
+ */
+ public function getBaseRegex() {
+ if ( is_null( $this->baseRegex ) ) {
+ $this->baseRegex = [ 0 => '', 1 => '' ];
+ $allGroups = [];
+ foreach ( $this->names as $name ) {
+ $magic = MagicWord::get( $name );
+ $case = intval( $magic->isCaseSensitive() );
+ foreach ( $magic->getSynonyms() as $i => $syn ) {
+ // Group name must start with a non-digit in PCRE 8.34+
+ $it = strtr( $i, '0123456789', 'abcdefghij' );
+ $groupName = $it . '_' . $name;
+ $group = '(?P<' . $groupName . '>' . preg_quote( $syn, '/' ) . ')';
+ // look for same group names to avoid same named subpatterns in the regex
+ if ( isset( $allGroups[$groupName] ) ) {
+ throw new MWException(
+ __METHOD__ . ': duplicate internal name in magic word array: ' . $name
+ );
+ }
+ $allGroups[$groupName] = true;
+ if ( $this->baseRegex[$case] === '' ) {
+ $this->baseRegex[$case] = $group;
+ } else {
+ $this->baseRegex[$case] .= '|' . $group;
+ }
+ }
+ }
+ }
+ return $this->baseRegex;
+ }
+
+ /**
+ * Get an unanchored regex that does not match parameters
+ * @return array
+ */
+ public function getRegex() {
+ if ( is_null( $this->regex ) ) {
+ $base = $this->getBaseRegex();
+ $this->regex = [ '', '' ];
+ if ( $this->baseRegex[0] !== '' ) {
+ $this->regex[0] = "/{$base[0]}/iuS";
+ }
+ if ( $this->baseRegex[1] !== '' ) {
+ $this->regex[1] = "/{$base[1]}/S";
+ }
+ }
+ return $this->regex;
+ }
+
+ /**
+ * Get a regex for matching variables with parameters
+ *
+ * @return string
+ */
+ public function getVariableRegex() {
+ return str_replace( "\\$1", "(.*?)", $this->getRegex() );
+ }
+
+ /**
+ * Get a regex anchored to the start of the string that does not match parameters
+ *
+ * @return array
+ */
+ public function getRegexStart() {
+ $base = $this->getBaseRegex();
+ $newRegex = [ '', '' ];
+ if ( $base[0] !== '' ) {
+ $newRegex[0] = "/^(?:{$base[0]})/iuS";
+ }
+ if ( $base[1] !== '' ) {
+ $newRegex[1] = "/^(?:{$base[1]})/S";
+ }
+ return $newRegex;
+ }
+
+ /**
+ * Get an anchored regex for matching variables with parameters
+ *
+ * @return array
+ */
+ public function getVariableStartToEndRegex() {
+ $base = $this->getBaseRegex();
+ $newRegex = [ '', '' ];
+ if ( $base[0] !== '' ) {
+ $newRegex[0] = str_replace( "\\$1", "(.*?)", "/^(?:{$base[0]})$/iuS" );
+ }
+ if ( $base[1] !== '' ) {
+ $newRegex[1] = str_replace( "\\$1", "(.*?)", "/^(?:{$base[1]})$/S" );
+ }
+ return $newRegex;
+ }
+
+ /**
+ * @since 1.20
+ * @return array
+ */
+ public function getNames() {
+ return $this->names;
+ }
+
+ /**
+ * Parse a match array from preg_match
+ * Returns array(magic word ID, parameter value)
+ * If there is no parameter value, that element will be false.
+ *
+ * @param array $m
+ *
+ * @throws MWException
+ * @return array
+ */
+ public function parseMatch( $m ) {
+ reset( $m );
+ while ( list( $key, $value ) = each( $m ) ) {
+ if ( $key === 0 || $value === '' ) {
+ continue;
+ }
+ $parts = explode( '_', $key, 2 );
+ if ( count( $parts ) != 2 ) {
+ // This shouldn't happen
+ // continue;
+ throw new MWException( __METHOD__ . ': bad parameter name' );
+ }
+ list( /* $synIndex */, $magicName ) = $parts;
+ $paramValue = next( $m );
+ return [ $magicName, $paramValue ];
+ }
+ // This shouldn't happen either
+ throw new MWException( __METHOD__ . ': parameter not found' );
+ }
+
+ /**
+ * Match some text, with parameter capture
+ * Returns an array with the magic word name in the first element and the
+ * parameter in the second element.
+ * Both elements are false if there was no match.
+ *
+ * @param string $text
+ *
+ * @return array
+ */
+ public function matchVariableStartToEnd( $text ) {
+ $regexes = $this->getVariableStartToEndRegex();
+ foreach ( $regexes as $regex ) {
+ if ( $regex !== '' ) {
+ $m = [];
+ if ( preg_match( $regex, $text, $m ) ) {
+ return $this->parseMatch( $m );
+ }
+ }
+ }
+ return [ false, false ];
+ }
+
+ /**
+ * Match some text, without parameter capture
+ * Returns the magic word name, or false if there was no capture
+ *
+ * @param string $text
+ *
+ * @return string|bool False on failure
+ */
+ public function matchStartToEnd( $text ) {
+ $hash = $this->getHash();
+ if ( isset( $hash[1][$text] ) ) {
+ return $hash[1][$text];
+ }
+ global $wgContLang;
+ $lc = $wgContLang->lc( $text );
+ if ( isset( $hash[0][$lc] ) ) {
+ return $hash[0][$lc];
+ }
+ return false;
+ }
+
+ /**
+ * Returns an associative array, ID => param value, for all items that match
+ * Removes the matched items from the input string (passed by reference)
+ *
+ * @param string &$text
+ *
+ * @return array
+ */
+ public function matchAndRemove( &$text ) {
+ $found = [];
+ $regexes = $this->getRegex();
+ foreach ( $regexes as $regex ) {
+ if ( $regex === '' ) {
+ continue;
+ }
+ $matches = [];
+ $res = preg_match_all( $regex, $text, $matches, PREG_SET_ORDER );
+ if ( $res === false ) {
+ LoggerFactory::getInstance( 'parser' )->warning( 'preg_match_all returned false', [
+ 'code' => preg_last_error(),
+ 'regex' => $regex,
+ 'text' => $text,
+ ] );
+ } elseif ( $res ) {
+ foreach ( $matches as $m ) {
+ list( $name, $param ) = $this->parseMatch( $m );
+ $found[$name] = $param;
+ }
+ }
+ $res = preg_replace( $regex, '', $text );
+ if ( $res === null ) {
+ LoggerFactory::getInstance( 'parser' )->warning( 'preg_replace returned null', [
+ 'code' => preg_last_error(),
+ 'regex' => $regex,
+ 'text' => $text,
+ ] );
+ }
+ $text = $res;
+ }
+ return $found;
+ }
+
+ /**
+ * Return the ID of the magic word at the start of $text, and remove
+ * the prefix from $text.
+ * Return false if no match found and $text is not modified.
+ * Does not match parameters.
+ *
+ * @param string &$text
+ *
+ * @return int|bool False on failure
+ */
+ public function matchStartAndRemove( &$text ) {
+ $regexes = $this->getRegexStart();
+ foreach ( $regexes as $regex ) {
+ if ( $regex === '' ) {
+ continue;
+ }
+ if ( preg_match( $regex, $text, $m ) ) {
+ list( $id, ) = $this->parseMatch( $m );
+ if ( strlen( $m[0] ) >= strlen( $text ) ) {
+ $text = '';
+ } else {
+ $text = substr( $text, strlen( $m[0] ) );
+ }
+ return $id;
+ }
+ }
+ return false;
+ }
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff