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<?php
namespace MediaWiki\CommentFormatter;
use MediaWiki\Linker\Linker;
use MediaWiki\Linker\LinkTarget;
use MediaWiki\Permissions\Authority;
use MediaWiki\Revision\RevisionRecord;
use Traversable;
/**
* This is the main service interface for converting single-line comments from
* various DB comment fields into HTML.
*
* @since 1.38
*/
class CommentFormatter {
/** @var CommentParserFactory */
protected $parserFactory;
/**
* @internal Use MediaWikiServices::getCommentFormatter()
*
* @param CommentParserFactory $parserFactory
*/
public function __construct( CommentParserFactory $parserFactory ) {
$this->parserFactory = $parserFactory;
}
/**
* Format comments using a fluent interface.
*
* @return CommentBatch
*/
public function createBatch() {
return new CommentBatch( $this );
}
/**
* Format a single comment. Similar to the old Linker::formatComment().
*
* @param string $comment
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @return string
*/
public function format( string $comment, ?LinkTarget $selfLinkTarget = null,
$samePage = false, $wikiId = false
) {
return $this->formatInternal( $comment, true, false, false,
$selfLinkTarget, $samePage, $wikiId );
}
/**
* Wrap a comment in standard punctuation and formatting if
* it's non-empty, otherwise return an empty string.
*
* @param string $comment
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @param bool $useParentheses
* @return string
*/
public function formatBlock( string $comment, ?LinkTarget $selfLinkTarget = null,
$samePage = false, $wikiId = false, $useParentheses = true
) {
return $this->formatInternal( $comment, true, true, $useParentheses,
$selfLinkTarget, $samePage, $wikiId );
}
/**
* Format a comment, passing through HTML in the input to the output.
* This is unsafe and exists only for backwards compatibility with
* Linker::formatLinksInComment().
*
* In new code, use formatLinks() or createBatch()->disableSectionLinks().
*
* @internal
*
* @param string $comment
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @return string
*/
public function formatLinksUnsafe( string $comment, ?LinkTarget $selfLinkTarget = null,
$samePage = false, $wikiId = false
) {
$parser = $this->parserFactory->create();
$preprocessed = $parser->preprocessUnsafe( $comment, $selfLinkTarget,
$samePage, $wikiId, false );
return $parser->finalize( $preprocessed );
}
/**
* Format links in a comment, ignoring section links in C-style comments.
*
* @param string $comment
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @return string
*/
public function formatLinks( string $comment, ?LinkTarget $selfLinkTarget = null,
$samePage = false, $wikiId = false
) {
return $this->formatInternal( $comment, false, false, false,
$selfLinkTarget, $samePage, $wikiId );
}
/**
* Format a single comment with many ugly boolean parameters.
*
* @param string $comment
* @param bool $enableSectionLinks
* @param bool $useBlock
* @param bool $useParentheses
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @return string|string[]
*/
private function formatInternal( $comment, $enableSectionLinks, $useBlock, $useParentheses,
$selfLinkTarget = null, $samePage = false, $wikiId = false
) {
$parser = $this->parserFactory->create();
$preprocessed = $parser->preprocess( $comment, $selfLinkTarget, $samePage, $wikiId,
$enableSectionLinks );
$output = $parser->finalize( $preprocessed );
if ( $useBlock ) {
$output = $this->wrapCommentWithBlock( $output, $useParentheses );
}
return $output;
}
/**
* Format comments which are provided as strings and all have the same
* self-link target and other options.
*
* If you need a different title for each comment, use createBatch().
*
* @param string[] $strings
* @param LinkTarget|null $selfLinkTarget The title used for fragment-only
* and section links, formerly $title.
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param string|false|null $wikiId ID of the wiki to link to (if not the local
* wiki), as used by WikiMap.
* @return string[]
*/
public function formatStrings( $strings, ?LinkTarget $selfLinkTarget = null,
$samePage = false, $wikiId = false
) {
$parser = $this->parserFactory->create();
$outputs = [];
foreach ( $strings as $i => $comment ) {
$outputs[$i] = $parser->preprocess( $comment, $selfLinkTarget, $samePage, $wikiId );
}
return $parser->finalize( $outputs );
}
/**
* Wrap and format the given revision's comment block, if the specified
* user is allowed to view it.
*
* This method produces HTML that requires CSS styles in mediawiki.interface.helpers.styles.
*
* NOTE: revision comments are special. This is not the same as getting a
* revision comment as a string and then formatting it with format().
*
* @param RevisionRecord $revision The revision to extract the comment and
* title from. The title should always be populated, to avoid an additional
* DB query.
* @param Authority $authority The user viewing the comment
* @param bool $samePage If true, self links are rendered with a fragment-
* only URL. Formerly $local.
* @param bool $isPublic Show only if all users can see it
* @param bool $useParentheses Whether the comment is wrapped in parentheses
* @return string
*/
public function formatRevision(
RevisionRecord $revision,
Authority $authority,
$samePage = false,
$isPublic = false,
$useParentheses = true
) {
$parser = $this->parserFactory->create();
return $parser->finalize( $this->preprocessRevComment(
$parser, $authority, $revision, $samePage, $isPublic, $useParentheses ) );
}
/**
* Format multiple revision comments.
*
* @see CommentFormatter::formatRevision()
*
* @param iterable<RevisionRecord> $revisions
* @param Authority $authority
* @param bool $samePage
* @param bool $isPublic
* @param bool $useParentheses
* @param bool $indexById
* @return string|string[]
*/
public function formatRevisions(
$revisions,
Authority $authority,
$samePage = false,
$isPublic = false,
$useParentheses = true,
$indexById = false
) {
$parser = $this->parserFactory->create();
$outputs = [];
foreach ( $revisions as $i => $rev ) {
if ( $indexById ) {
$key = $rev->getId();
} else {
$key = $i;
}
// @phan-suppress-next-line PhanTypeMismatchDimAssignment getId does not return null here
$outputs[$key] = $this->preprocessRevComment(
$parser, $authority, $rev, $samePage, $isPublic, $useParentheses );
}
return $parser->finalize( $outputs );
}
/**
* Format a batch of revision comments using a fluent interface.
*
* @return RevisionCommentBatch
*/
public function createRevisionBatch() {
return new RevisionCommentBatch( $this );
}
/**
* Format an iterator over CommentItem objects
*
* A shortcut for createBatch()->comments()->execute() for when you
* need to pass no other options.
*
* @param iterable<CommentItem>|Traversable $items
* @return string[]
*/
public function formatItems( $items ) {
return $this->formatItemsInternal( $items );
}
/**
* @internal For use by CommentBatch
*
* Format comments with nullable batch options.
*
* @param iterable<CommentItem> $items
* @param LinkTarget|null $selfLinkTarget
* @param bool|null $samePage
* @param string|false|null $wikiId
* @param bool|null $enableSectionLinks
* @param bool|null $useBlock
* @param bool|null $useParentheses
* @return string[]
*/
public function formatItemsInternal( $items, $selfLinkTarget = null,
$samePage = null, $wikiId = null, $enableSectionLinks = null,
$useBlock = null, $useParentheses = null
) {
$outputs = [];
$parser = $this->parserFactory->create();
foreach ( $items as $index => $item ) {
$preprocessed = $parser->preprocess(
$item->comment,
$item->selfLinkTarget ?? $selfLinkTarget,
$item->samePage ?? $samePage ?? false,
$item->wikiId ?? $wikiId ?? false,
$enableSectionLinks ?? true
);
if ( $useBlock ?? false ) {
$preprocessed = $this->wrapCommentWithBlock(
$preprocessed,
$useParentheses ?? true
);
}
$outputs[$index] = $preprocessed;
}
return $parser->finalize( $outputs );
}
/**
* Wrap a comment in standard punctuation and formatting if
* it's non-empty, otherwise return empty string.
*
* @param string $formatted
* @param bool $useParentheses Whether the comment is wrapped in parentheses
*
* @return string
*/
protected function wrapCommentWithBlock(
$formatted, $useParentheses
) {
// '*' used to be the comment inserted by the software way back
// in antiquity in case none was provided, here for backwards
// compatibility, acc. to [brooke] -ævar
if ( $formatted == '' || $formatted == '*' ) {
return '';
}
if ( $useParentheses ) {
$formatted = wfMessage( 'parentheses' )->rawParams( $formatted )->escaped();
$classNames = 'comment';
} else {
$classNames = 'comment comment--without-parentheses';
}
return " <span class=\"$classNames\">$formatted</span>";
}
/**
* Preprocess and wrap a revision comment.
*
* @param CommentParser $parser
* @param Authority $authority
* @param RevisionRecord $revRecord
* @param bool $samePage Whether section links should refer to local page
* @param bool $isPublic Show only if all users can see it
* @param bool $useParentheses (optional) Wrap comments in parentheses where needed
* @return string HTML fragment with link markers
*/
private function preprocessRevComment(
CommentParser $parser,
Authority $authority,
RevisionRecord $revRecord,
$samePage = false,
$isPublic = false,
$useParentheses = true
) {
if ( $revRecord->getComment( RevisionRecord::RAW ) === null ) {
return "";
}
if ( $revRecord->audienceCan(
RevisionRecord::DELETED_COMMENT,
$isPublic ? RevisionRecord::FOR_PUBLIC : RevisionRecord::FOR_THIS_USER,
$authority )
) {
$comment = $revRecord->getComment( RevisionRecord::FOR_THIS_USER, $authority );
$block = $parser->preprocess(
$comment ? $comment->text : '',
$revRecord->getPageAsLinkTarget(),
$samePage,
null,
true
);
$block = $this->wrapCommentWithBlock( $block, $useParentheses );
} else {
$block = " <span class=\"comment\">" . wfMessage( 'rev-deleted-comment' )->escaped() . "</span>";
}
if ( $revRecord->isDeleted( RevisionRecord::DELETED_COMMENT ) ) {
$class = Linker::getRevisionDeletedClass( $revRecord );
return " <span class=\"$class comment\">$block</span>";
}
return $block;
}
}