mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
synced 2024-12-18 02:51:26 +00:00
778 lines
24 KiB
PHP
778 lines
24 KiB
PHP
<?php
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namespace MediaWiki\Extension\DiscussionTools;
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use Config;
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use LogicException;
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use MediaWiki\Extension\DiscussionTools\ThreadItem\ContentCommentItem;
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use MediaWiki\Extension\DiscussionTools\ThreadItem\ContentThreadItem;
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use MediaWiki\MainConfigNames;
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use Title;
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use Wikimedia\Assert\Assert;
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use Wikimedia\Parsoid\DOM\Comment;
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use Wikimedia\Parsoid\DOM\Element;
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use Wikimedia\Parsoid\DOM\Node;
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use Wikimedia\Parsoid\DOM\Text;
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use Wikimedia\Parsoid\Utils\DOMCompat;
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class CommentUtils {
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private function __construct() {
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}
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private static $blockElementTypes = [
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'div', 'p',
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// Tables
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'table', 'tbody', 'thead', 'tfoot', 'caption', 'th', 'tr', 'td',
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// Lists
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'ul', 'ol', 'li', 'dl', 'dt', 'dd',
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// HTML5 heading content
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'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hgroup',
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// HTML5 sectioning content
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'article', 'aside', 'body', 'nav', 'section', 'footer', 'header', 'figure',
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'figcaption', 'fieldset', 'details', 'blockquote',
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// Other
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'hr', 'button', 'canvas', 'center', 'col', 'colgroup', 'embed',
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'map', 'object', 'pre', 'progress', 'video'
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];
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/**
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* @param Node $node
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* @return bool Node is a block element
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*/
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public static function isBlockElement( Node $node ): bool {
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return $node instanceof Element &&
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in_array( strtolower( $node->tagName ), static::$blockElementTypes, true );
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}
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private const SOL_TRANSPARENT_LINK_REGEX =
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'/(?:^|\s)mw:PageProp\/(?:Category|redirect|Language)(?=$|\s)/D';
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/**
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* @param Node $node
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* @return bool Node is considered a rendering-transparent node in Parsoid
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*/
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public static function isRenderingTransparentNode( Node $node ): bool {
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$nextSibling = $node->nextSibling;
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return (
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$node instanceof Comment ||
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$node instanceof Element && (
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strtolower( $node->tagName ) === 'meta' ||
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(
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strtolower( $node->tagName ) === 'link' &&
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preg_match( static::SOL_TRANSPARENT_LINK_REGEX, $node->getAttribute( 'rel' ) ?? '' )
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) ||
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// Empty inline templates, e.g. tracking templates. (T269036)
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// But not empty nodes that are just the start of a non-empty template about-group. (T290940)
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(
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strtolower( $node->tagName ) === 'span' &&
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in_array( 'mw:Transclusion', explode( ' ', $node->getAttribute( 'typeof' ) ?? '' ), true ) &&
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!static::htmlTrim( DOMCompat::getInnerHTML( $node ) ) &&
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(
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!$nextSibling || !( $nextSibling instanceof Element ) ||
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// Maybe we should be checking all of the about-grouped nodes to see if they're empty,
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// but that's prooobably not needed in practice, and it leads to a quadratic worst case.
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$nextSibling->getAttribute( 'about' ) !== $node->getAttribute( 'about' )
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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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* @param Node $node
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* @return bool Node was added to the page by DiscussionTools
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*/
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public static function isOurGeneratedNode( Node $node ): bool {
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return $node instanceof Element && (
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DOMCompat::getClassList( $node )->contains( 'ext-discussiontools-init-replylink-buttons' ) ||
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$node->hasAttribute( 'data-mw-comment-start' ) ||
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$node->hasAttribute( 'data-mw-comment-end' )
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);
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}
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/**
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* Elements which can't have element children (but some may have text content).
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*
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* @var string[]
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*/
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private static array $noElementChildrenElementTypes = [
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// https://html.spec.whatwg.org/multipage/syntax.html#elements-2
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// Void elements
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'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input',
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'link', 'meta', 'param', 'source', 'track', 'wbr',
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// Raw text elements
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'script', 'style',
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// Escapable raw text elements
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'textarea', 'title',
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// Foreign elements
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'math', 'svg',
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// Treated like text when scripting is enabled in the parser
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// https://html.spec.whatwg.org/#the-noscript-element
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'noscript',
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// Replaced elements (that aren't already included above)
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// https://html.spec.whatwg.org/multipage/rendering.html#replaced-elements
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// They might allow element children, but they aren't rendered on the page.
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'audio', 'canvas', 'iframe', 'object', 'video',
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];
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/**
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* @param Node $node
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* @return bool If true, node can't have element children. If false, it's complicated.
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*/
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public static function cantHaveElementChildren( Node $node ): bool {
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return (
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$node instanceof Comment ||
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$node instanceof Element && (
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in_array( strtolower( $node->tagName ), static::$noElementChildrenElementTypes, true ) ||
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// Thumbnail wrappers generated by MediaTransformOutput::linkWrap (T301427),
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// for compatibility with TimedMediaHandler.
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// There is no better way to detect them, and we can't insert markers here,
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// because the media DOM CSS depends on specific tag names and their order :(
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// TODO See if we can remove this condition when wgParserEnableLegacyMediaDOM=false
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// is enabled everywhere.
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(
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in_array( strtolower( $node->tagName ), [ 'a', 'span' ], true ) &&
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$node->firstChild &&
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// We always step inside a child node so this can't be infinite, silly Phan
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// @phan-suppress-next-line PhanInfiniteRecursion
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static::cantHaveElementChildren( $node->firstChild )
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) ||
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// Do not insert anything inside figures when using wgParserEnableLegacyMediaDOM=false,
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// because their CSS can't handle it (T320285).
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strtolower( $node->tagName ) === 'figure'
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)
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);
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}
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/**
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* Check whether the node is a comment separator (instead of a part of the comment).
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*
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* @param Node $node
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* @return bool
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*/
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public static function isCommentSeparator( Node $node ): bool {
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return $node instanceof Element && (
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// Empty paragraphs (`<p><br></p>`) between indented comments mess up indentation detection
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strtolower( $node->tagName ) === 'br' ||
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// Horizontal line
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strtolower( $node->tagName ) === 'hr' ||
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// TemplateStyles followed by any of the others
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(
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in_array( strtolower( $node->tagName ), [ 'style', 'link' ], true ) &&
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// @phan-suppress-next-line PhanInfiniteRecursion
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$node->nextSibling && self::isCommentSeparator( $node->nextSibling )
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) ||
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// {{outdent}} templates
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DOMCompat::getClassList( $node )->contains( 'outdent-template' ) ||
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// {{tracked}} templates (T313097)
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DOMCompat::getClassList( $node )->contains( 'mw-trackedTemplate' ) ||
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// Wikitext definition list term markup (`;`) when used as a fake heading (T265964)
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(
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strtolower( $node->nodeName ) === 'dl' &&
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count( $node->childNodes ) === 1 &&
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$node->firstChild instanceof Element &&
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strtolower( $node->firstChild->nodeName ) === 'dt'
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)
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);
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}
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/**
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* Check whether the node is a comment content. It's a little vague what this means…
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*
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* @param Node $node Node, should be a leaf node (a node with no children)
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* @return bool
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*/
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public static function isCommentContent( Node $node ): bool {
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return (
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$node instanceof Text &&
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static::htmlTrim( $node->nodeValue ?? '' ) !== ''
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) ||
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(
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static::cantHaveElementChildren( $node )
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);
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}
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/**
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* Get the index of $child in its parent
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*
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* @param Node $child
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* @return int
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*/
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public static function childIndexOf( Node $child ): int {
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$i = 0;
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while ( ( $child = $child->previousSibling ) ) {
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$i++;
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}
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return $i;
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}
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/**
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* Check whether a Node contains (is an ancestor of) another Node (or is the same node)
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*
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* @param Node $ancestor
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* @param Node $descendant
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* @return bool
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*/
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public static function contains( Node $ancestor, Node $descendant ): bool {
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// TODO can we use Node->compareDocumentPosition() here maybe?
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$node = $descendant;
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while ( $node && $node !== $ancestor ) {
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$node = $node->parentNode;
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}
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return $node === $ancestor;
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}
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/**
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* Find closest ancestor element using one of the given tag names.
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*
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* @param Node $node
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* @param string[] $tagNames
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* @return Element|null
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*/
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public static function closestElement( Node $node, array $tagNames ): ?Element {
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do {
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if (
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$node instanceof Element &&
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in_array( strtolower( $node->tagName ), $tagNames, true )
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) {
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return $node;
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}
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$node = $node->parentNode;
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} while ( $node );
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return null;
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}
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/**
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* Find closest ancestor element that has sibling nodes
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*
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* @param Node $node
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* @param string $direction Can be 'next', 'previous', or 'either'
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* @return Element|null
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*/
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public static function closestElementWithSibling( Node $node, string $direction ): ?Element {
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do {
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if (
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$node instanceof Element && (
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( $node->nextSibling && ( $direction === 'next' || $direction == 'either' ) ) ||
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( $node->previousSibling && ( $direction === 'previous' || $direction == 'either' ) )
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)
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) {
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return $node;
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}
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$node = $node->parentNode;
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} while ( $node );
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return null;
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}
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/**
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* Find the transclusion node which rendered the current node, if it exists.
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*
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* 1. Find the closest ancestor with an 'about' attribute
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* 2. Find the main node of the about-group (first sibling with the same 'about' attribute)
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* 3. If this is an mw:Transclusion node, return it; otherwise, go to step 1
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*
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* @param Node $node
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* @return Element|null Transclusion node, null if not found
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*/
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public static function getTranscludedFromElement( Node $node ): ?Element {
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while ( $node ) {
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// 1.
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if (
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$node instanceof Element &&
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$node->getAttribute( 'about' ) &&
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preg_match( '/^#mwt\d+$/', $node->getAttribute( 'about' ) ?? '' )
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) {
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$about = $node->getAttribute( 'about' );
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// 2.
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while (
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( $previousSibling = $node->previousSibling ) &&
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$previousSibling instanceof Element &&
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$previousSibling->getAttribute( 'about' ) === $about
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) {
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$node = $previousSibling;
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}
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// 3.
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if (
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$node->getAttribute( 'typeof' ) &&
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in_array( 'mw:Transclusion', explode( ' ', $node->getAttribute( 'typeof' ) ?? '' ), true )
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) {
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break;
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}
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}
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$node = $node->parentNode;
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}
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return $node;
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}
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/**
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* Given a heading node, return the node on which the ID attribute is set.
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*
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* Also returns the offset within that node where the heading text starts.
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*
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* @param Element $heading Heading node (`<h1>`-`<h6>`)
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* @return array Array containing a 'node' (Element) and offset (int)
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*/
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public static function getHeadlineNodeAndOffset( Element $heading ): array {
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// This code assumes that $wgFragmentMode is [ 'html5', 'legacy' ] or [ 'html5' ]
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$headline = $heading;
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$offset = 0;
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if ( $headline->hasAttribute( 'data-mw-comment-start' ) ) {
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$headline = $headline->parentNode;
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Assert::precondition( $headline !== null, 'data-mw-comment-start was attached to a heading' );
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}
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if ( !$headline->getAttribute( 'id' ) ) {
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// PHP HTML: Find the child with .mw-headline
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$headline = DOMCompat::querySelector( $headline, '.mw-headline' );
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if ( !$headline ) {
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$headline = $heading;
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}
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}
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return [
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'node' => $headline,
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'offset' => $offset,
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];
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}
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/**
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* Trim ASCII whitespace, as defined in the HTML spec.
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*
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* @param string $str
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* @return string
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*/
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public static function htmlTrim( string $str ): string {
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// https://infra.spec.whatwg.org/#ascii-whitespace
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return trim( $str, "\t\n\f\r " );
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}
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/**
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* Get the indent level of $node, relative to $rootNode.
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*
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* The indent level is the number of lists inside of which it is nested.
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*
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* @param Node $node
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* @param Element $rootNode
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* @return int
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*/
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public static function getIndentLevel( Node $node, Element $rootNode ): int {
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$indent = 0;
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while ( $node ) {
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if ( $node === $rootNode ) {
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break;
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}
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$tagName = $node instanceof Element ? strtolower( $node->tagName ) : null;
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if ( $tagName === 'li' || $tagName === 'dd' ) {
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$indent++;
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}
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$node = $node->parentNode;
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}
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return $indent;
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}
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/**
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* Get an array of sibling nodes that contain parts of the given range.
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*
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* @param ImmutableRange $range
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* @return Node[]
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*/
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public static function getCoveredSiblings( ImmutableRange $range ): array {
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$ancestor = $range->commonAncestorContainer;
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// Convert to array early because apparently NodeList acts like a linked list
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// and accessing items by index is slow
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$siblings = iterator_to_array( $ancestor->childNodes );
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$start = 0;
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$end = count( $siblings ) - 1;
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// Find first of the siblings that contains the item
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if ( $ancestor === $range->startContainer ) {
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$start = $range->startOffset;
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} else {
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while ( !static::contains( $siblings[ $start ], $range->startContainer ) ) {
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$start++;
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}
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}
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// Find last of the siblings that contains the item
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if ( $ancestor === $range->endContainer ) {
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$end = $range->endOffset - 1;
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} else {
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while ( !static::contains( $siblings[ $end ], $range->endContainer ) ) {
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$end--;
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}
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}
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return array_slice( $siblings, $start, $end - $start + 1 );
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}
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/**
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* Get the nodes (if any) that contain the given thread item, and nothing else.
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*
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* @param ContentThreadItem $item
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* @param ?Node $excludedAncestorNode Node that shouldn't be included in the result, even if it
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* contains the item and nothing else. This is intended to avoid traversing outside of a node
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* which is a container for all the thread items.
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* @return Node[]|null
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*/
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public static function getFullyCoveredSiblings(
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ContentThreadItem $item, ?Node $excludedAncestorNode = null
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): ?array {
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$siblings = static::getCoveredSiblings( $item->getRange() );
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$makeRange = static function ( $siblings ) {
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return new ImmutableRange(
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$siblings[0]->parentNode,
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CommentUtils::childIndexOf( $siblings[0] ),
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end( $siblings )->parentNode,
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CommentUtils::childIndexOf( end( $siblings ) ) + 1
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);
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};
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$matches = static::compareRanges( $makeRange( $siblings ), $item->getRange() ) === 'equal';
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if ( $matches ) {
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// If these are all of the children (or the only child), go up one more level
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while (
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( $parent = $siblings[ 0 ]->parentNode ) &&
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$parent !== $excludedAncestorNode &&
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static::compareRanges( $makeRange( [ $parent ] ), $item->getRange() ) === 'equal'
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) {
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$siblings = [ $parent ];
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}
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return $siblings;
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}
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return null;
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}
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/**
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* Unwrap Parsoid sections
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*
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* @param Element $element Parent element, e.g. document body
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*/
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public static function unwrapParsoidSections( Element $element ): void {
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$sections = DOMCompat::querySelectorAll( $element, 'section[data-mw-section-id]' );
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foreach ( $sections as $section ) {
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$parent = $section->parentNode;
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while ( $section->firstChild ) {
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$parent->insertBefore( $section->firstChild, $section );
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}
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$parent->removeChild( $section );
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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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*
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* @param string $url
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* @param Config $config
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* @return string|null
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*/
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public static function getTitleFromUrl( string $url, Config $config ): ?string {
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$bits = parse_url( $url );
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$query = wfCgiToArray( $bits['query'] ?? '' );
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if ( isset( $query['title'] ) ) {
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return $query['title'];
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}
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// TODO: Set the correct base in the document?
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if ( str_starts_with( $url, './' ) ) {
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$url = substr( $url, 2 );
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$url = 'https://local' . str_replace( '$1', $url, $config->get( MainConfigNames::ArticlePath ) );
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} elseif ( !str_contains( $url, '://' ) ) {
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$url = 'https://local' . $url;
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}
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$articlePathRegexp = '/' . str_replace(
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preg_quote( '$1', '/' ),
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'([^?]*)',
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preg_quote( $config->get( MainConfigNames::ArticlePath ), '/' )
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) . '/';
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$matches = null;
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if ( preg_match( $articlePathRegexp, $url, $matches ) ) {
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return 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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* Traverse the document in depth-first order, calling the callback whenever entering and leaving
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* a node. The walk starts before the given node and ends when callback returns a truthy value, or
|
|
* after reaching the end of the document.
|
|
*
|
|
* You might also think about this as processing XML token stream linearly (rather than XML
|
|
* nodes), as if we were parsing the document.
|
|
*
|
|
* @param Node $node Node to start at
|
|
* @param callable $callback Function accepting two arguments: $event ('enter' or 'leave') and
|
|
* $node (Node)
|
|
* @return mixed Final return value of the callback
|
|
*/
|
|
public static function linearWalk( Node $node, callable $callback ) {
|
|
$result = null;
|
|
[ $withinNode, $beforeNode ] = [ $node->parentNode, $node ];
|
|
|
|
while ( $beforeNode || $withinNode ) {
|
|
if ( $beforeNode ) {
|
|
$result = $callback( 'enter', $beforeNode );
|
|
[ $withinNode, $beforeNode ] = [ $beforeNode, $beforeNode->firstChild ];
|
|
} else {
|
|
$result = $callback( 'leave', $withinNode );
|
|
[ $withinNode, $beforeNode ] = [ $withinNode->parentNode, $withinNode->nextSibling ];
|
|
}
|
|
|
|
if ( $result ) {
|
|
return $result;
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Like #linearWalk, but it goes backwards.
|
|
*
|
|
* @inheritDoc ::linearWalk()
|
|
*/
|
|
public static function linearWalkBackwards( Node $node, callable $callback ) {
|
|
$result = null;
|
|
[ $withinNode, $beforeNode ] = [ $node->parentNode, $node ];
|
|
|
|
while ( $beforeNode || $withinNode ) {
|
|
if ( $beforeNode ) {
|
|
$result = $callback( 'enter', $beforeNode );
|
|
[ $withinNode, $beforeNode ] = [ $beforeNode, $beforeNode->lastChild ];
|
|
} else {
|
|
$result = $callback( 'leave', $withinNode );
|
|
[ $withinNode, $beforeNode ] = [ $withinNode->parentNode, $withinNode->previousSibling ];
|
|
}
|
|
|
|
if ( $result ) {
|
|
return $result;
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @param ImmutableRange $range (must not be collapsed)
|
|
* @return Node
|
|
*/
|
|
public static function getRangeFirstNode( ImmutableRange $range ): Node {
|
|
Assert::precondition( !$range->collapsed, 'Range is not collapsed' );
|
|
// PHP bug: childNodes can be null
|
|
return $range->startContainer->childNodes && $range->startContainer->childNodes->length ?
|
|
$range->startContainer->childNodes[ $range->startOffset ] :
|
|
$range->startContainer;
|
|
}
|
|
|
|
/**
|
|
* @param ImmutableRange $range (must not be collapsed)
|
|
* @return Node
|
|
*/
|
|
public static function getRangeLastNode( ImmutableRange $range ): Node {
|
|
Assert::precondition( !$range->collapsed, 'Range is not collapsed' );
|
|
// PHP bug: childNodes can be null
|
|
return $range->endContainer->childNodes && $range->endContainer->childNodes->length ?
|
|
$range->endContainer->childNodes[ $range->endOffset - 1 ] :
|
|
$range->endContainer;
|
|
}
|
|
|
|
/**
|
|
* Check whether two ranges overlap, and how.
|
|
*
|
|
* Includes a hack to check for "almost equal" ranges (whose start/end boundaries only differ by
|
|
* "uninteresting" nodes that we ignore when detecting comments), and treat them as equal.
|
|
*
|
|
* Illustration of return values:
|
|
* [ equal ]
|
|
* |[ contained ]|
|
|
* [ | contains | ]
|
|
* [overlap|start] |
|
|
* | [overlap|end]
|
|
* [before] | |
|
|
* | | [after]
|
|
*
|
|
* @param ImmutableRange $a
|
|
* @param ImmutableRange $b
|
|
* @return string One of:
|
|
* - 'equal': Ranges A and B are equal
|
|
* - 'contains': Range A contains range B
|
|
* - 'contained': Range A is contained within range B
|
|
* - 'after': Range A is before range B
|
|
* - 'before': Range A is after range B
|
|
* - 'overlapstart': Start of range A overlaps range B
|
|
* - 'overlapend': End of range A overlaps range B
|
|
*/
|
|
public static function compareRanges( ImmutableRange $a, ImmutableRange $b ): string {
|
|
// Compare the positions of: start of A to start of B, start of A to end of B, and so on.
|
|
// Watch out, the constant names are the opposite of what they should be.
|
|
$startToStart = $a->compareBoundaryPoints( ImmutableRange::START_TO_START, $b );
|
|
$startToEnd = $a->compareBoundaryPoints( ImmutableRange::END_TO_START, $b );
|
|
$endToStart = $a->compareBoundaryPoints( ImmutableRange::START_TO_END, $b );
|
|
$endToEnd = $a->compareBoundaryPoints( ImmutableRange::END_TO_END, $b );
|
|
|
|
// Handle almost equal ranges: When start or end boundary points of the two ranges are different,
|
|
// but only differ by "uninteresting" nodes, treat them as equal instead.
|
|
if (
|
|
( $startToStart < 0 && static::compareRangesAlmostEqualBoundaries( $a, $b, 'start' ) ) ||
|
|
( $startToStart > 0 && static::compareRangesAlmostEqualBoundaries( $b, $a, 'start' ) )
|
|
) {
|
|
$startToStart = 0;
|
|
}
|
|
if (
|
|
( $endToEnd < 0 && static::compareRangesAlmostEqualBoundaries( $a, $b, 'end' ) ) ||
|
|
( $endToEnd > 0 && static::compareRangesAlmostEqualBoundaries( $b, $a, 'end' ) )
|
|
) {
|
|
$endToEnd = 0;
|
|
}
|
|
|
|
if ( $startToStart === 0 && $endToEnd === 0 ) {
|
|
return 'equal';
|
|
}
|
|
if ( $startToStart <= 0 && $endToEnd >= 0 ) {
|
|
return 'contains';
|
|
}
|
|
if ( $startToStart >= 0 && $endToEnd <= 0 ) {
|
|
return 'contained';
|
|
}
|
|
if ( $startToEnd >= 0 ) {
|
|
return 'after';
|
|
}
|
|
if ( $endToStart <= 0 ) {
|
|
return 'before';
|
|
}
|
|
if ( $startToStart > 0 && $startToEnd < 0 && $endToEnd >= 0 ) {
|
|
return 'overlapstart';
|
|
}
|
|
if ( $endToEnd < 0 && $endToStart > 0 && $startToStart <= 0 ) {
|
|
return 'overlapend';
|
|
}
|
|
|
|
throw new LogicException( 'Unreachable' );
|
|
}
|
|
|
|
/**
|
|
* Check if the given boundary points of ranges A and B are almost equal (only differing by
|
|
* uninteresting nodes).
|
|
*
|
|
* Boundary of A must be before the boundary of B in the tree.
|
|
*
|
|
* @param ImmutableRange $a
|
|
* @param ImmutableRange $b
|
|
* @param string $boundary 'start' or 'end'
|
|
* @return bool
|
|
*/
|
|
private static function compareRangesAlmostEqualBoundaries(
|
|
ImmutableRange $a, ImmutableRange $b, string $boundary
|
|
): bool {
|
|
// This code is awful, but several attempts to rewrite it made it even worse.
|
|
// You're welcome to give it a try.
|
|
|
|
$from = $boundary === 'end' ? static::getRangeLastNode( $a ) : static::getRangeFirstNode( $a );
|
|
$to = $boundary === 'end' ? static::getRangeLastNode( $b ) : static::getRangeFirstNode( $b );
|
|
|
|
$skipNode = null;
|
|
if ( $boundary === 'end' ) {
|
|
$skipNode = $from;
|
|
}
|
|
|
|
$foundContent = false;
|
|
static::linearWalk(
|
|
$from,
|
|
static function ( string $event, Node $n ) use (
|
|
$from, $to, $boundary, &$skipNode, &$foundContent
|
|
) {
|
|
if ( $n === $to && $event === ( $boundary === 'end' ? 'leave' : 'enter' ) ) {
|
|
return true;
|
|
}
|
|
if ( $skipNode ) {
|
|
if ( $n === $skipNode && $event === 'leave' ) {
|
|
$skipNode = null;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if ( $event === 'enter' ) {
|
|
if (
|
|
CommentUtils::isCommentSeparator( $n ) ||
|
|
CommentUtils::isRenderingTransparentNode( $n ) ||
|
|
CommentUtils::isOurGeneratedNode( $n )
|
|
) {
|
|
$skipNode = $n;
|
|
|
|
} elseif (
|
|
CommentUtils::isCommentContent( $n )
|
|
) {
|
|
$foundContent = true;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
);
|
|
|
|
return !$foundContent;
|
|
}
|
|
|
|
/**
|
|
* Assuming that the thread item set contains exactly one comment (or multiple comments with
|
|
* identical signatures, plus optional heading), check whether that comment is properly signed by
|
|
* the expected author (that is: there is a signature, and either there's nothing following the
|
|
* signature, or there's some text within the same paragraph that was detected as part of the same
|
|
* comment).
|
|
*
|
|
* @param ContentThreadItemSet $itemSet
|
|
* @param string $author
|
|
* @param Element $rootNode
|
|
* @return bool
|
|
*/
|
|
public static function isSingleCommentSignedBy(
|
|
ContentThreadItemSet $itemSet,
|
|
string $author,
|
|
Element $rootNode
|
|
): bool {
|
|
$items = $itemSet->getThreadItems();
|
|
|
|
if ( $items ) {
|
|
$lastItem = end( $items );
|
|
// Check that we've detected a comment first, not just headings (T304377)
|
|
if ( !( $lastItem instanceof ContentCommentItem && $lastItem->getAuthor() === $author ) ) {
|
|
return false;
|
|
}
|
|
|
|
// Range covering all of the detected items (to account for a heading, and for multiple
|
|
// signatures resulting in multiple comments)
|
|
$commentsRange = new ImmutableRange(
|
|
$items[0]->getRange()->startContainer,
|
|
$items[0]->getRange()->startOffset,
|
|
$lastItem->getRange()->endContainer,
|
|
$lastItem->getRange()->endOffset
|
|
);
|
|
$bodyRange = new ImmutableRange(
|
|
$rootNode, 0, $rootNode, count( $rootNode->childNodes )
|
|
);
|
|
|
|
if ( static::compareRanges( $commentsRange, $bodyRange ) === 'equal' ) {
|
|
// New comment includes a signature in the proper place
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get the ID for a new topics subscription from a page title
|
|
*
|
|
* @param Title $title Page title
|
|
* @return string ID for a new topics subscription
|
|
*/
|
|
public static function getNewTopicsSubscriptionId( Title $title ) {
|
|
return "p-topics-{$title->getNamespace()}:{$title->getDBkey()}";
|
|
}
|
|
}
|