mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
synced 2024-11-28 10:11:45 +00:00
1080 lines
35 KiB
PHP
1080 lines
35 KiB
PHP
<?php
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namespace MediaWiki\Extension\DiscussionTools;
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use Config;
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use DateInterval;
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use DateTime;
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use DateTimeImmutable;
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use DateTimeZone;
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use DOMElement;
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use DOMNode;
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use DOMText;
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use DOMXPath;
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use IP;
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use Language;
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use MediaWiki\MediaWikiServices;
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use stdClass;
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use Title;
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// TODO maybe make a class for ranges?
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// TODO make a class for comments
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// TODO clean up static vs non-static
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// TODO consider rewriting as single traversal, without XPath
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// TODO consider making timestamp parsing not a returned function
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class CommentParser {
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private const SIGNATURE_SCAN_LIMIT = 100;
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/**
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* @param Language $language Content language
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* @param Config $config
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* @param array $data
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*/
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public function __construct( Language $language, Config $config, array $data = [] ) {
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$this->language = $language;
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$this->config = $config;
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$this->dateFormat = $this->language->getDateFormatString(
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'both',
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$this->language->dateFormat( false )
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);
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// TODO: We probably shouldn't assume that each digit can be represented by a single BMP
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// codepoint in every language (although it seems to be true right now).
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$this->digits = $this->config->get( 'TranslateNumerals' ) ?
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$this->language->formatNum( '0123456789', true ) :
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null;
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$this->digitsRegexp = $this->config->get( 'TranslateNumerals' ) ?
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'[' . $this->language->formatNum( '0123456789', true ) . ']' :
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'\\d';
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// TODO: Instead of passing data used for mocking, mock the methods that fetch the data.
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$this->data = $data;
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$this->localTimezone = $this->config->get( 'Localtimezone' );
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$this->timezoneAbbrs = $this->computeTimezoneAbbrs();
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}
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public static function newFromGlobalState() : CommentParser {
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return new static(
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MediaWikiServices::getInstance()->getContentLanguage(),
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MediaWikiServices::getInstance()->getMainConfig()
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);
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}
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/**
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* Build the timezone abbreviations map for the local timezone.
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* @return array Associative array mapping localized timezone abbreviations to IANA abbreviations
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*/
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private function computeTimezoneAbbrs() : array {
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// Return only timezone abbreviations for the local timezone (there will often be two, for
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// non-DST and DST timestamps, and sometimes more due to historical data, but that's okay).
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$timezoneAbbrs = array_keys( array_filter(
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DateTimeZone::listAbbreviations(),
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function ( $timezones ) {
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foreach ( $timezones as $tz ) {
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if ( $tz['timezone_id'] === $this->localTimezone ) {
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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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return array_combine(
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array_map( function ( $tzMsg ) {
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// MWTimestamp::getTimezoneMessage()
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// Parser::pstPass2()
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// Messages used here: 'timezone-utc' and so on
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$key = 'timezone-' . strtolower( trim( $tzMsg ) );
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$msg = wfMessage( $key )->inLanguage( $this->language );
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// TODO: This probably causes a similar issue to https://phabricator.wikimedia.org/T221294,
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// but we *must* check the message existence in the database, because the messages are not
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// actually defined by MediaWiki core for any timezone other than UTC...
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if ( $msg->exists() ) {
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return $this->getMessages( [ $key ] )[0];
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}
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return strtoupper( $tzMsg );
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}, $timezoneAbbrs ),
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array_map( 'strtoupper', $timezoneAbbrs )
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);
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}
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/**
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* Get a MediaWiki page title from a URL
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* @param string $url
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* @return Title|null
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*/
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private function getTitleFromUrl( string $url ) : ?Title {
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// TODO: Set the correct base in the document?
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if ( strpos( $url, './' ) === 0 ) {
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$url = 'https://local/wiki/' . substr( $url, 2 );
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} elseif ( strpos( $url, '://' ) === false ) {
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$url = 'https://local' . $url;
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}
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$bits = wfParseUrl( $url );
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$query = wfCgiToArray( $bits['query'] ?? '' );
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if ( isset( $query['title'] ) ) {
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return Title::newFromText( $query['title'] );
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}
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$articlePathRegexp = '/' . str_replace(
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preg_quote( '$1', '/' ),
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'(.*)',
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preg_quote( $this->config->get( 'ArticlePath' ), '/' )
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) . '/';
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$matches = null;
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if ( preg_match( $articlePathRegexp, $url, $matches ) ) {
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return Title::newFromText( urldecode( $matches[1] ) );
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}
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return null;
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}
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/**
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* Return the next leaf node in the tree order that is not an empty or whitespace-only text node.
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*
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* In other words, this returns a text node with content other than whitespace, or an element node
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* with no children, that follows the given node.
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*
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* @param DOMNode $node Node to start searching at. This node's children are ignored.
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* @param DOMElement $rootNode Node to stop searching at
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* @return DOMNode|null
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*/
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private function nextInterestingLeafNode( DOMNode $node, DOMElement $rootNode ) : ?DOMNode {
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$n = $node;
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do {
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if ( $n->firstChild && ( $node === $rootNode || $n !== $node ) ) {
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$n = $n->firstChild;
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} elseif ( $n->nextSibling ) {
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$n = $n->nextSibling;
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} else {
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while ( $n && $n !== $rootNode && !$n->nextSibling ) {
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$n = $n->parentNode;
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}
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$n = $n->nextSibling;
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}
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if (
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$n && (
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(
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$n->nodeType === XML_TEXT_NODE &&
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CommentUtils::htmlTrim( $n->nodeValue ) !== ''
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) ||
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(
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$n->nodeType === XML_CDATA_SECTION_NODE &&
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CommentUtils::htmlTrim( $n->nodeValue ) !== ''
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) ||
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( $n->nodeType === XML_ELEMENT_NODE && !$n->firstChild )
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)
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) {
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return $n;
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}
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} while ( $n && $n !== $rootNode );
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return null;
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}
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/**
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* @param string[] $values Values to match
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* @return string Regular expression
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*/
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private static function regexpAlternateGroup( array $values ) : string {
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return '(' . implode( '|', array_map( function ( $x ) {
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return preg_quote( $x, '/' );
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}, $values ) ) . ')';
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}
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/**
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* @param string[] $messageKeys Message keys
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* @return string[] Message values
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*/
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private function getMessages( array $messageKeys ) : array {
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return array_map( function ( $key ) {
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return isset( $this->data['contLangMessages'][$key] ) ?
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$this->data['contLangMessages'][$key] :
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wfMessage( $key )->inLanguage( $this->language )->text();
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}, $messageKeys );
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}
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/**
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* Get a regexp that matches timestamps generated using the given date format.
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*
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* This only supports format characters that are used by the default date format in any of
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* MediaWiki's languages, namely: D, d, F, G, H, i, j, l, M, n, Y, xg, xkY (and escape characters),
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* and only dates when MediaWiki existed, let's say 2000 onwards (Thai dates before 1941 are
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* complicated).
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*
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* @param string $format Date format
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* @param string $digitsRegexp Regular expression matching a single localized digit, e.g. '[0-9]'
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* @param array $tzAbbrs Associative array mapping localized timezone abbreviations to
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* IANA abbrevations, for the local timezone, e.g. [ 'EDT' => 'EDT', 'EST' => 'EST' ]
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* @return string Regular expression
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*/
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private function getTimestampRegexp(
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string $format, string $digitsRegexp, array $tzAbbrs
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) : string {
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$formatLength = strlen( $format );
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$s = '';
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// Adapted from Language::sprintfDate()
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for ( $p = 0; $p < $formatLength; $p++ ) {
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$num = false;
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$code = $format[ $p ];
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if ( $code === 'x' && $p < $formatLength - 1 ) {
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$code .= $format[++$p];
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}
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if ( $code === 'xk' && $p < $formatLength - 1 ) {
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$code .= $format[++$p];
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}
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switch ( $code ) {
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case 'xx' :
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$s .= 'x';
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break;
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case 'xg':
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$s .= self::regexpAlternateGroup(
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$this->getMessages( Language::MONTH_GENITIVE_MESSAGES )
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);
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break;
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case 'd':
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$num = '2';
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break;
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case 'D':
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$s .= self::regexpAlternateGroup(
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$this->getMessages( Language::WEEKDAY_ABBREVIATED_MESSAGES )
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);
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break;
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case 'j':
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$num = '1,2';
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break;
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case 'l':
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$s .= self::regexpAlternateGroup(
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$this->getMessages( Language::WEEKDAY_MESSAGES )
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);
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break;
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case 'F':
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$s .= self::regexpAlternateGroup(
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$this->getMessages( Language::MONTH_MESSAGES )
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);
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break;
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case 'M':
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$s .= self::regexpAlternateGroup(
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$this->getMessages( Language::MONTH_ABBREVIATED_MESSAGES )
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);
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break;
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case 'n':
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$num = '1,2';
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break;
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case 'Y':
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$num = '4';
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break;
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case 'xkY':
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$num = '4';
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break;
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case 'G':
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$num = '1,2';
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break;
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case 'H':
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$num = '2';
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break;
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case 'i':
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$num = '2';
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break;
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case '\\':
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// Backslash escaping
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if ( $p < $formatLength - 1 ) {
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$s .= preg_quote( $format[++$p], '/' );
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} else {
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$s .= preg_quote( '\\', '/' );
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}
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break;
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case '"':
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// Quoted literal
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if ( $p < $formatLength - 1 ) {
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$endQuote = strpos( $format, '"', $p + 1 );
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if ( $endQuote === false ) {
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// No terminating quote, assume literal "
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$s .= '"';
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} else {
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$s .= preg_quote( substr( $format, $p + 1, $endQuote - $p - 1 ), '/' );
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$p = $endQuote;
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}
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} else {
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# Quote at end of string, assume literal "
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$s .= '"';
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}
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break;
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default:
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$s .= preg_quote( $format[$p], '/' );
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}
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if ( $num !== false ) {
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$s .= '(' . $digitsRegexp . '{' . $num . '})';
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}
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}
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$tzRegexp = self::regexpAlternateGroup( array_keys( $tzAbbrs ) );
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// Hardcoded parentheses and space like in Parser::pstPass2
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// Ignore some invisible Unicode characters that often sneak into copypasted timestamps (T245784)
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// \uNNNN syntax can only be used from PHP 7.3
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return '/' . $s . '[\\x{200E}\\x{200F}]? [\\x{200E}\\x{200F}]?\\(' . $tzRegexp . '\\)/u';
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}
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/**
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* Get a function that parses timestamps generated using the given date format, based on the result
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* of matching the regexp returned by getTimestampRegexp()
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*
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* @param string $format Date format, as used by MediaWiki
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* @param string|null $digits Localised digits from 0 to 9, e.g. `0123456789`
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* @param string $localTimezone Local timezone IANA name, e.g. `America/New_York`
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* @param array $tzAbbrs Map of localised timezone abbreviations to IANA abbreviations
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* for the local timezone, e.g. [ 'EDT' => 'EDT', 'EST' => 'EST' ]
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* @return function Parser function
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*/
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private function getTimestampParser(
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string $format, ?string $digits, string $localTimezone, array $tzAbbrs
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) : callable {
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$untransformDigits = function ( string $text ) use ( $digits ) {
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if ( !$digits ) {
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return $text;
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}
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return preg_replace_callback(
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'/[' . $digits . ']/',
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function ( $m ) use ( $digits ) {
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return strpos( $digits, $m[0] );
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},
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$text
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);
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};
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$formatLength = strlen( $format );
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$matchingGroups = [];
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for ( $p = 0; $p < $formatLength; $p++ ) {
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$code = $format[$p];
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if ( $code === 'x' && $p < $formatLength - 1 ) {
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$code .= $format[++$p];
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}
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if ( $code === 'xk' && $p < $formatLength - 1 ) {
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$code .= $format[++$p];
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}
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switch ( $code ) {
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case 'xx':
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break;
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case 'xg':
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case 'd':
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case 'j':
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case 'D':
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case 'l':
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case 'F':
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case 'M':
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case 'n':
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case 'Y':
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case 'xkY':
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case 'G':
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case 'H':
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case 'i':
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$matchingGroups[] = $code;
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break;
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case '\\':
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// Backslash escaping
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if ( $p < $formatLength - 1 ) {
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$p++;
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}
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break;
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case '"':
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// Quoted literal
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if ( $p < $formatLength - 1 ) {
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$endQuote = strpos( $format, '"', $p + 1 );
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if ( $endQuote !== false ) {
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$p = $endQuote;
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}
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}
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break;
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default:
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break;
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}
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}
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return function ( array $match ) use (
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$matchingGroups, $untransformDigits, $localTimezone, $tzAbbrs
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) {
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if ( is_array( $match[0] ) ) {
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// Strip PREG_OFFSET_CAPTURE data
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$match = array_map( function ( $tuple ) {
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return $tuple[0];
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}, $match );
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}
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$year = 0;
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$monthIdx = 0;
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$day = 0;
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$hour = 0;
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$minute = 0;
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foreach ( $matchingGroups as $i => $code ) {
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$text = $match[$i + 1];
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switch ( $code ) {
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case 'xg':
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$monthIdx = array_search( $text, $this->getMessages( Language::MONTH_GENITIVE_MESSAGES ) );
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break;
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case 'd':
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case 'j':
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$day = intval( $untransformDigits( $text ) );
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break;
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case 'D':
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case 'l':
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// Day of the week - unused
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break;
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case 'F':
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$monthIdx = array_search( $text, $this->getMessages( Language::MONTH_MESSAGES ) );
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break;
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case 'M':
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$monthIdx = array_search( $text, $this->getMessages( Language::MONTH_ABBREVIATED_MESSAGES ) );
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break;
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case 'n':
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$monthIdx = intval( $untransformDigits( $text ) ) - 1;
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break;
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case 'Y':
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$year = intval( $untransformDigits( $text ) );
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break;
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case 'xkY':
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// Thai year
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$year = intval( $untransformDigits( $text ) ) - 543;
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break;
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case 'G':
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case 'H':
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$hour = intval( $untransformDigits( $text ) );
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break;
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case 'i':
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$minute = intval( $untransformDigits( $text ) );
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break;
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default:
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// TODO throw NotImplementedException or whatever it's called
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throw new MWException( 'Not implemented' );
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}
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}
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// The last matching group is the timezone abbreviation
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$tzAbbr = $tzAbbrs[ end( $match ) ];
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// Most of the time, the timezone abbreviation is not necessary to parse the date, since we
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// can assume all times are in the wiki's local timezone.
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$date = new DateTime();
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// setTimezone must be called before setDate/setTime
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$date->setTimezone( new DateTimeZone( $localTimezone ) );
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$date->setDate( $year, $monthIdx + 1, $day );
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$date->setTime( $hour, $minute, 0 );
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// But during the "fall back" at the end of DST, some times will happen twice.
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// Since the timezone abbreviation disambiguates the DST/non-DST times, we can detect
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// when PHP chose the wrong one, and then try the other one. It appears that PHP always
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// uses the later (non-DST) hour, but that behavior isn't documented, so we account for both.
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if ( $date->format( 'T' ) !== $tzAbbr ) {
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$altDate = clone $date;
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if ( $date->format( 'I' ) ) {
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// Parsed time is DST, try non-DST by advancing one hour
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$altDate->add( new DateInterval( 'PT1H' ) );
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} else {
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// Parsed time is non-DST, try DST by going back one hour
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$altDate->sub( new DateInterval( 'PT1H' ) );
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}
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if ( $altDate->format( 'T' ) === $tzAbbr ) {
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$date = $altDate;
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}
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// else: neither DST nor non-DST gives us the expected timezone
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// TODO log a warning in this case?
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}
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// Now set the timezone back to UTC for formatting
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$date->setTimezone( new DateTimeZone( 'UTC' ) );
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$date = DateTimeImmutable::createFromMutable( $date );
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return $date;
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};
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}
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/**
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* Get a regular expression that matches timestamps in the local date format.
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*
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* This calls getTimestampRegexp() with predefined data for the current wiki.
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*
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* @return string Regular expression
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*/
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public function getLocalTimestampRegexp() : string {
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return self::getTimestampRegexp(
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$this->dateFormat,
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$this->digitsRegexp,
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$this->timezoneAbbrs
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);
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}
|
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|
|
/**
|
|
* Get a function that parses timestamps in the local date format, based on the result
|
|
* of matching the regexp returned by getLocalTimestampRegexp().
|
|
*
|
|
* This calls getTimestampParser() with predefined data for the current wiki.
|
|
*
|
|
* @return function Parser function
|
|
*/
|
|
private function getLocalTimestampParser() : callable {
|
|
return $this->getTimestampParser(
|
|
$this->dateFormat,
|
|
$this->digits,
|
|
$this->localTimezone,
|
|
$this->timezoneAbbrs
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Get the indent level of $node, relative to $rootNode.
|
|
*
|
|
* The indent level is the number of lists inside of which it is nested.
|
|
*
|
|
* @param DOMNode $node
|
|
* @param DOMElement $rootNode
|
|
* @return int
|
|
*/
|
|
private function getIndentLevel( DOMNode $node, DOMElement $rootNode ) : int {
|
|
$indent = 0;
|
|
while ( $node ) {
|
|
if ( $node === $rootNode ) {
|
|
break;
|
|
}
|
|
$nodeName = strtolower( $node->nodeName );
|
|
if ( $nodeName === 'li' || $nodeName === 'dd' ) {
|
|
$indent++;
|
|
}
|
|
$node = $node->parentNode;
|
|
}
|
|
return $indent;
|
|
}
|
|
|
|
/**
|
|
* Find a user signature preceding a timestamp.
|
|
*
|
|
* The signature includes the timestamp node.
|
|
*
|
|
* A signature must contain at least one link to the user's userpage, discussion page or
|
|
* contributions (and may contain other links). The link may be nested in other elements.
|
|
*
|
|
* This function returns a two-element array. The first element is an array of sibling nodes
|
|
* comprising the signature, with $timestampNode as the last element. The second element
|
|
* is the username (null for unsigned comments).
|
|
*
|
|
* @param DOMText $timestampNode Text node
|
|
* @param DOMNode|null $until Node to stop searching at
|
|
* @return array [ nodes, username ]
|
|
*/
|
|
private function findSignature( DOMText $timestampNode, ?DOMNode $until = null ) : array {
|
|
$node = $timestampNode;
|
|
$sigNodes = [ $node ];
|
|
$sigUsername = null;
|
|
$length = 0;
|
|
$lastLinkNode = $timestampNode;
|
|
while (
|
|
( $node = $node->previousSibling ) && $length < self::SIGNATURE_SCAN_LIMIT && $node !== $until
|
|
) {
|
|
$sigNodes[] = $node;
|
|
$length += $node->textContent ? strlen( $node->textContent ) : 0;
|
|
if ( $node->nodeType === XML_TEXT_NODE ) {
|
|
// FIXME use proper constant, or proper isText check
|
|
continue;
|
|
}
|
|
|
|
$links = [];
|
|
if ( strtolower( $node->nodeName ) === 'a' ) {
|
|
$links = [ $node ];
|
|
} elseif ( $node->nodeType === XML_ELEMENT_NODE ) {
|
|
// Handle links nested in formatting elements.
|
|
// Helpful accidental feature: users whose signature is not detected in full (due to
|
|
// text formatting) can just wrap it in a <span> to fix that.
|
|
// "Ten Pound Hammer • (What did I screw up now?)"
|
|
// "« Saper // dyskusja »"
|
|
$links = $node->getElementsByTagName( 'a' );
|
|
}
|
|
if ( !count( $links ) ) {
|
|
continue;
|
|
}
|
|
|
|
// Find the earliest link that links to the user's user page
|
|
foreach ( $links as $link ) {
|
|
$username = null;
|
|
$title = $this->getTitleFromUrl( $link->getAttribute( 'href' ) );
|
|
if ( !$title ) {
|
|
continue;
|
|
}
|
|
if ( $title->getNamespace() === NS_USER || $title->getNamespace() === NS_USER_TALK ) {
|
|
$username = $title->getText();
|
|
if ( strpos( $username, '/' ) !== false ) {
|
|
continue;
|
|
}
|
|
} elseif ( $title->isSpecial( 'Contributions' ) ) {
|
|
$parts = explode( '/', $title->getText(), 2 );
|
|
if ( !isset( $parts[1] ) ) {
|
|
continue;
|
|
}
|
|
// Normalize the username: users may link to their contributions with an unnormalized name
|
|
$userpage = Title::makeTitleSafe( NS_USER, $parts[1] );
|
|
if ( !$userpage ) {
|
|
continue;
|
|
}
|
|
$username = $userpage->getText();
|
|
}
|
|
if ( !$username ) {
|
|
continue;
|
|
}
|
|
if ( IP::isIPv6( $username ) ) {
|
|
// Bot-generated links "Preceding unsigned comment added by" have non-standard case
|
|
$username = strtoupper( $username );
|
|
}
|
|
|
|
// Accept the first link to the user namespace, then only accept links to that user
|
|
if ( $sigUsername === null ) {
|
|
$sigUsername = $username;
|
|
}
|
|
if ( $username === $sigUsername ) {
|
|
$lastLinkNode = $node;
|
|
break;
|
|
}
|
|
}
|
|
// Keep looking if a node with links wasn't a link to a user page
|
|
// "Doc James (talk · contribs · email)"
|
|
}
|
|
// Pop excess text nodes
|
|
while ( end( $sigNodes ) !== $lastLinkNode ) {
|
|
array_pop( $sigNodes );
|
|
}
|
|
return [ $sigNodes, $sigUsername ];
|
|
}
|
|
|
|
/**
|
|
* Find all timestamps within a DOM subtree.
|
|
*
|
|
* @param DOMElement $rootNode
|
|
* @return array Array of [node, matchData] pairs
|
|
*/
|
|
public function findTimestamps( DOMElement $rootNode ) : array {
|
|
$xpath = new DOMXPath( $rootNode->ownerDocument );
|
|
$textNodes = $xpath->query( '//text()', $rootNode );
|
|
$matches = [];
|
|
$timestampRegex = self::getLocalTimestampRegexp();
|
|
foreach ( $textNodes as $node ) {
|
|
$startNode = $node;
|
|
$nodeText = '';
|
|
|
|
while ( $node ) {
|
|
$nodeText .= $node->nodeValue;
|
|
|
|
// In Parsoid HTML, entities are represented as a 'mw:Entity' node, rather than normal HTML
|
|
// entities. On Arabic Wikipedia, the "UTC" timezone name contains some non-breaking spaces,
|
|
// which apparently are often turned into entities by buggy editing tools. To handle
|
|
// this, we must piece together the text, so that our regexp can match those timestamps.
|
|
if (
|
|
$node->nextSibling &&
|
|
$node->nextSibling->nodeType === XML_ELEMENT_NODE &&
|
|
$node->nextSibling->getAttribute( 'typeof' ) === 'mw:Entity'
|
|
) {
|
|
$nodeText .= $node->nextSibling->firstChild->nodeValue;
|
|
|
|
// If the entity is followed by more text, do this again
|
|
if (
|
|
$node->nextSibling->nextSibling &&
|
|
$node->nextSibling->nextSibling->nodeType === XML_TEXT_NODE
|
|
) {
|
|
$node = $node->nextSibling->nextSibling;
|
|
} else {
|
|
$node = null;
|
|
}
|
|
} else {
|
|
$node = null;
|
|
}
|
|
}
|
|
|
|
$matchData = null;
|
|
// Allows us to mimic match.index in #getComments
|
|
if ( preg_match( $timestampRegex, $nodeText, $matchData, PREG_OFFSET_CAPTURE ) ) {
|
|
$matches[] = [ $startNode, $matchData ];
|
|
}
|
|
}
|
|
return $matches;
|
|
}
|
|
|
|
/**
|
|
* Get all discussion comments (and headings) within a DOM subtree.
|
|
*
|
|
* This returns a flat list, use groupThreads() to associate replies to original messages and
|
|
* get a tree structure starting at section headings.
|
|
*
|
|
* For example, for a MediaWiki discussion like this (we're dealing with HTML DOM here,
|
|
* the wikitext syntax is just for illustration):
|
|
*
|
|
* == A ==
|
|
* B. ~~~~
|
|
* : C.
|
|
* : C. ~~~~
|
|
* :: D. ~~~~
|
|
* ::: E. ~~~~
|
|
* ::: F. ~~~~
|
|
* : G. ~~~~
|
|
* H. ~~~~
|
|
* : I. ~~~~
|
|
*
|
|
* This function would return a structure like:
|
|
*
|
|
* [
|
|
* [ 'type' => 'heading', 'level' => 0, 'range' => (h2: A) },
|
|
* [ 'type' => 'comment', 'level' => 1, 'range' => (p: B) },
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: C, li: C) },
|
|
* [ 'type' => 'comment', 'level' => 3, 'range' => (li: D) },
|
|
* [ 'type' => 'comment', 'level' => 4, 'range' => (li: E) },
|
|
* [ 'type' => 'comment', 'level' => 4, 'range' => (li: F) },
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: G) },
|
|
* [ 'type' => 'comment', 'level' => 1, 'range' => (p: H) },
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: I) }
|
|
* ]
|
|
*
|
|
* The elements of the array are stdClass objects with the following fields:
|
|
* - 'type' (string): 'heading' or 'comment'
|
|
* - 'range' (array): The extent of the comment, including the signature and timestamp.
|
|
* Comments can start or end in the middle of a DOM node.
|
|
* Keys: 'startContainer', 'startOffset', 'endContainer' and 'endOffset'
|
|
* - 'level' (int): Indentation level of the comment. Headings are 0, comments start at 1.
|
|
* - 'timestamp' (string): Timestamp (TODO in what format?). Not set for headings.
|
|
* - 'author' (string|null): Comment author's username, null for unsigned comments.
|
|
* Not set for headings.
|
|
*
|
|
* @param DOMElement $rootNode
|
|
* @return stdClass[] Results. Each result is an object.
|
|
*/
|
|
public function getComments( DOMElement $rootNode ) : array {
|
|
$timestamps = $this->findTimestamps( $rootNode );
|
|
|
|
$xpath = new DOMXPath( $rootNode->ownerDocument );
|
|
$allNodes = $xpath->query( '//text()|//node()', $rootNode );
|
|
$tocNode = $rootNode->ownerDocument->getElementById( 'toc' );
|
|
$comments = [];
|
|
$dfParser = $this->getLocalTimestampParser();
|
|
|
|
// Placeholder heading in case there are comments in the 0th section
|
|
$range = (object)[
|
|
'startContainer' => $rootNode,
|
|
'startOffset' => 0,
|
|
'endContainer' => $rootNode,
|
|
'endOffset' => 0
|
|
];
|
|
$fakeHeading = (object)[
|
|
'placeholderHeading' => true,
|
|
'type' => 'heading',
|
|
'range' => $range,
|
|
'level' => 0
|
|
];
|
|
|
|
$curComment = $fakeHeading;
|
|
|
|
$nextTimestamp = 0;
|
|
foreach ( $allNodes as $node ) {
|
|
// Skip nodes inside <div id="toc">
|
|
if ( $tocNode && CommentUtils::contains( $tocNode, $node ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( $node->nodeType === XML_ELEMENT_NODE && preg_match( '/^h[1-6]$/i', $node->nodeName ) ) {
|
|
$range = (object)[
|
|
'startContainer' => $node,
|
|
'startOffset' => 0,
|
|
'endContainer' => $node,
|
|
'endOffset' => $node->childNodes->length
|
|
];
|
|
$curComment = (object)[
|
|
'type' => 'heading',
|
|
'range' => $range,
|
|
'level' => 0
|
|
];
|
|
$comments[] = $curComment;
|
|
} elseif ( isset( $timestamps[$nextTimestamp] ) && $node === $timestamps[$nextTimestamp][0] ) {
|
|
$foundSignature = $this->findSignature( $node, $curComment->range->endContainer );
|
|
$author = $foundSignature[1];
|
|
$firstSigNode = end( $foundSignature[0] );
|
|
|
|
if ( !$author ) {
|
|
// Ignore timestamps for which we couldn't find a signature. It's probably not a real
|
|
// comment, but just a false match due to a copypasted timestamp.
|
|
$nextTimestamp++;
|
|
continue;
|
|
}
|
|
|
|
// Everything from the last comment up to here is the next comment
|
|
$startNode = $this->nextInterestingLeafNode( $curComment->range->endContainer, $rootNode );
|
|
$match = $timestamps[$nextTimestamp][1];
|
|
$range = (object)[
|
|
'startContainer' => $startNode->parentNode,
|
|
'startOffset' => CommentUtils::childIndexOf( $startNode ),
|
|
'endContainer' => $node,
|
|
'endOffset' => $match[0][1] + strlen( $match[0][0] )
|
|
];
|
|
$sigRange = (object)[
|
|
'startContainer' => $firstSigNode->parentNode,
|
|
'startOffset' => CommentUtils::childIndexOf( $firstSigNode ),
|
|
'endContainer' => $node,
|
|
'endOffset' => $match[0][1] + strlen( $match[0][0] )
|
|
];
|
|
|
|
$startLevel = $this->getIndentLevel( $startNode, $rootNode ) + 1;
|
|
$endLevel = $this->getIndentLevel( $node, $rootNode ) + 1;
|
|
if ( $startLevel !== $endLevel ) {
|
|
// TODO warn: 'Comment starts and ends with different indentation'
|
|
}
|
|
|
|
// Avoid generating multiple comments when there is more than one signature on a single "line".
|
|
// Often this is done when someone edits their comment later and wants to add a note about that.
|
|
// (Or when another person corrects a typo, or strikes out a comment, etc.) Multiple comments
|
|
// within one paragraph/listitem result in a confusing double "Reply" button, and we also have
|
|
// no way to indicate which one you're replying to (this might matter in the future for
|
|
// notifications or something).
|
|
if (
|
|
$curComment->type === 'comment' &&
|
|
(
|
|
CommentUtils::closestElement(
|
|
$node, [ 'li', 'dd', 'p' ]
|
|
) ?? $node->parentNode
|
|
) ===
|
|
(
|
|
CommentUtils::closestElement(
|
|
$curComment->range->endContainer, [ 'li', 'dd', 'p' ]
|
|
) ?? $curComment->range->endContainer->parentNode
|
|
)
|
|
) {
|
|
// Merge this with the previous comment. Use that comment's author and timestamp.
|
|
$curComment->range->endContainer = $range->endContainer;
|
|
$curComment->range->endOffset = $range->endOffset;
|
|
$curComment->signatureRanges[] = $sigRange;
|
|
$curComment->level = min( min( $startLevel, $endLevel ), $curComment->level );
|
|
|
|
$nextTimestamp++;
|
|
continue;
|
|
}
|
|
|
|
$curComment = (object)[
|
|
'type' => 'comment',
|
|
// Almost DateTimeInterface::RFC3339_EXTENDED
|
|
'timestamp' => $dfParser( $match )->format( 'Y-m-d\TH:i:s.v\Z' ),
|
|
'author' => $author,
|
|
'range' => $range,
|
|
'signatureRanges' => [ $sigRange ],
|
|
// Should this use the indent level of $startNode or $node?
|
|
'level' => min( $startLevel, $endLevel )
|
|
];
|
|
$comments[] = $curComment;
|
|
$nextTimestamp++;
|
|
}
|
|
}
|
|
|
|
// Insert the fake placeholder heading if there are any comments in the 0th section
|
|
// (before the first real heading)
|
|
if ( count( $comments ) && $comments[ 0 ]->type !== 'heading' ) {
|
|
array_unshift( $comments, $fakeHeading );
|
|
}
|
|
|
|
return $comments;
|
|
}
|
|
|
|
/**
|
|
* Group discussion comments into threads and associate replies to original messages.
|
|
*
|
|
* Each thread must begin with a heading. Original messages in the thread are treated as replies to
|
|
* its heading. Other replies are associated based on the order and indentation level.
|
|
*
|
|
* Note that the objects in `comments` are extended in-place with the additional data.
|
|
*
|
|
* For example, for a MediaWiki discussion like this (we're dealing with HTML DOM here,
|
|
* the wikitext syntax is just for illustration):
|
|
*
|
|
* == A ==
|
|
* B. ~~~~
|
|
* : C.
|
|
* : C. ~~~~
|
|
* :: D. ~~~~
|
|
* ::: E. ~~~~
|
|
* ::: F. ~~~~
|
|
* : G. ~~~~
|
|
* H. ~~~~
|
|
* : I. ~~~~
|
|
*
|
|
* This function would return a structure like:
|
|
*
|
|
* [
|
|
* [ 'type' => 'heading', 'level' => 0, 'range' => (h2: A), 'replies' => [
|
|
* [ 'type' => 'comment', 'level' => 1, 'range' => (p: B), 'replies' => [
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: C, li: C), 'replies' => [
|
|
* [ 'type' => 'comment', 'level' => 3, 'range' => (li: D), 'replies' => [
|
|
* [ 'type' => 'comment', 'level' => 4, 'range' => (li: E), 'replies' => [] ],
|
|
* [ 'type' => 'comment', 'level' => 4, 'range' => (li: F), 'replies': [] ],
|
|
* ] ],
|
|
* ] ],
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: G), 'replies' => [] ],
|
|
* ] ],
|
|
* [ 'type' => 'comment', 'level' => 1, 'range' => (p: H), 'replies' => [
|
|
* [ 'type' => 'comment', 'level' => 2, 'range' => (li: I), 'replies' => [] ],
|
|
* ] ],
|
|
* ] ],
|
|
* ]
|
|
*
|
|
* @param stdClass[] &$comments Result of #getComments, will be modified to add more properties
|
|
* @return stdClass[] Tree structure of comments, using the same objects as `comments`. Top-level
|
|
* items are the headings. The following properties are added:
|
|
* - id: Unique ID (within the page) for this comment, intended to be used to
|
|
* find this comment in other revisions of the same page
|
|
* - replies: Comment objects which are replies to this comment
|
|
* - parent: Comment object which this is a reply to (null for headings)
|
|
*/
|
|
public function groupThreads( array &$comments ) : array {
|
|
$threads = [];
|
|
$replies = [];
|
|
$commentsById = [];
|
|
|
|
foreach ( $comments as &$comment ) {
|
|
if ( $comment->level === 0 ) {
|
|
// We don't need ids for section headings right now, but we might in the future
|
|
// e.g. if we allow replying directly to sections (adding top-level comments)
|
|
$id = null;
|
|
} else {
|
|
$id = ( $comment->author ?? '' ) . '|' . $comment->timestamp;
|
|
|
|
// If there would be multiple comments with the same ID (i.e. the user left multiple comments
|
|
// in one edit, or within a minute), append sequential numbers
|
|
$number = 0;
|
|
while ( isset( $commentsById["$id|$number"] ) ) {
|
|
$number++;
|
|
}
|
|
$id = "$id|$number";
|
|
}
|
|
if ( $id !== null ) {
|
|
$commentsById[$id] = $comment;
|
|
}
|
|
|
|
// This modifies the original objects in $comments!
|
|
$comment->id = $id;
|
|
$comment->replies = [];
|
|
$comment->parent = null;
|
|
|
|
if ( count( $replies ) < $comment->level ) {
|
|
// Someone skipped an indentation level (or several). Pretend that the previous reply
|
|
// covers multiple indentation levels, so that following comments get connected to it.
|
|
// TODO warn: 'Comment skips indentation level'
|
|
while ( count( $replies ) < $comment->level ) {
|
|
// FIXME this will clone the reply, not just set a reference
|
|
$replies[] = end( $replies );
|
|
}
|
|
}
|
|
|
|
if ( $comment->level === 0 ) {
|
|
// New root (thread)
|
|
$threads[] = $comment;
|
|
} elseif ( isset( $replies[ $comment->level - 1 ] ) ) {
|
|
// Add as a reply to the closest less-nested comment
|
|
$comment->parent = $replies[ $comment->level - 1 ];
|
|
$comment->parent->replies[] = $comment;
|
|
} else {
|
|
// TODO warn: 'Comment could not be connected to a thread'
|
|
}
|
|
|
|
$replies[ $comment->level ] = $comment;
|
|
// Cut off more deeply nested replies
|
|
// TODO look up if there's a more convenient function to truncate arrays
|
|
array_splice( $replies, $comment->level + 1, count( $replies ) - $comment->level - 1 );
|
|
}
|
|
|
|
return $threads;
|
|
}
|
|
|
|
/**
|
|
* Get the list of authors involved in a comment and its replies.
|
|
*
|
|
* You probably want to pass a thread root here (a heading).
|
|
*
|
|
* @param stdClass $comment Comment object, as returned by #groupThreads
|
|
* @return string[] Author usernames
|
|
*/
|
|
public function getAuthors( stdClass $comment ) : array {
|
|
$authors = [];
|
|
$getAuthorSet = function ( $comment ) use ( &$authors, &$getAuthorSet ) {
|
|
if ( $comment->author ?? false ) {
|
|
$authors[ $comment->author ] = true;
|
|
}
|
|
// Get the set of authors in the same format from each reply
|
|
array_map( $getAuthorSet, $comment->replies );
|
|
};
|
|
|
|
$getAuthorSet( $comment );
|
|
|
|
ksort( $authors );
|
|
return array_keys( $authors );
|
|
}
|
|
|
|
/**
|
|
* Get the name of the page from which this comment is transcluded (if any).
|
|
*
|
|
* @param stdClass $comment Comment object, as returned by #groupThreads
|
|
* @return string|bool `false` if this comment is not transcluded. A string if it's transcluded
|
|
* from a single page (the page title, in text form with spaces). `true` if it's transcluded, but
|
|
* we can't determine the source.
|
|
*/
|
|
public function getTranscludedFrom( stdClass $comment ) {
|
|
// If some template is used within the comment (e.g. {{ping|…}} or {{tl|…}}), that *does not* mean
|
|
// the comment is transcluded. We only want to consider comments to be transcluded if the wrapper
|
|
// element (usually <li> or <p>) is marked as part of a transclusion.
|
|
// TODO: This seems to work fine but I'm having a hard time explaining why it is correct...
|
|
$node = $comment->range->endContainer;
|
|
|
|
// Find the node containing information about the transclusion:
|
|
// 1. Find the closest ancestor with an 'about' attribute
|
|
// 2. Find the main node of the about-group (first sibling with the same 'about' attribute)
|
|
// 3. If this is an mw:Transclusion node, return it; otherwise, go to step 1
|
|
while ( $node ) {
|
|
// 1.
|
|
if (
|
|
$node->nodeType === XML_ELEMENT_NODE &&
|
|
$node->getAttribute( 'about' ) &&
|
|
preg_match( '/^#mwt\d+$/', $node->getAttribute( 'about' ) )
|
|
) {
|
|
$about = $node->getAttribute( 'about' );
|
|
|
|
// 2.
|
|
while (
|
|
$node->previousSibling &&
|
|
$node->previousSibling->nodeType === XML_ELEMENT_NODE &&
|
|
$node->previousSibling->getAttribute( 'about' ) === $about
|
|
) {
|
|
$node = $node->previousSibling;
|
|
}
|
|
|
|
// 3.
|
|
if (
|
|
$node->getAttribute( 'typeof' ) &&
|
|
inArray( 'mw:Transclusion', explode( ' ', $node->getAttribute( 'typeof' ) ) )
|
|
) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
$node = $node->parentNode;
|
|
}
|
|
|
|
if ( !$node ) {
|
|
// No mw:Transclusion node found, this comment is not transcluded
|
|
return false;
|
|
}
|
|
|
|
$dataMw = json_decode( $node->getAttribute( 'data-mw' ), true );
|
|
|
|
// Only return a page name if this is a simple single-template transclusion.
|
|
if (
|
|
$dataMw['parts'] &&
|
|
count( $dataMw['parts'] ) === 1 &&
|
|
$dataMw['parts'][0]['template'] &&
|
|
$dataMw['parts'][0]['template']['target']['href']
|
|
) {
|
|
// TODO: Slice off the './' prefix and convert to text form (underscores to spaces, URL-decoded)
|
|
return $dataMw['parts'][0]['template']['target']['href'];
|
|
}
|
|
|
|
// Multi-template transclusion, or a parser function call, or template-affected wikitext outside
|
|
// of a template call, or a mix of the above
|
|
return true;
|
|
}
|
|
}
|