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<?php
namespace MediaWiki\Extension\DiscussionTools;
use InvalidArgumentException;
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\Context\IContextSource;
use MediaWiki\Extension\DiscussionTools\ThreadItem\DatabaseThreadItem;
use MediaWiki\Html\Html;
use MediaWiki\Linker\Linker;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\Pager\TablePager;
use MediaWiki\Title\Title;
use OOUI;
class TopicSubscriptionsPager extends TablePager {
/**
* Map of our field names (see ::getFieldNames()) to the column names actually used for
* pagination. This is needed to ensure that the values are unique, and that pagination
* won't get "stuck" when e.g. 50 subscriptions are all created within a second.
*/
private const INDEX_FIELDS = [
// The auto-increment ID will almost always have the same order as sub_created
// and the field already has an index.
'_topic' => [ 'sub_id' ],
'sub_created' => [ 'sub_id' ],
// TODO Add indexes that cover these fields to enable sorting by them
// 'sub_state' => [ 'sub_state', 'sub_item' ],
// 'sub_created' => [ 'sub_created', 'sub_item' ],
// 'sub_notified' => [ 'sub_notified', 'sub_item' ],
];
private LinkBatchFactory $linkBatchFactory;
private ThreadItemStore $threadItemStore;
private ThreadItemFormatter $threadItemFormatter;
/** @var array<string,DatabaseThreadItem[]> */
private array $threadItemsByName = [];
public function __construct(
IContextSource $context,
LinkRenderer $linkRenderer,
LinkBatchFactory $linkBatchFactory,
ThreadItemStore $threadItemStore,
ThreadItemFormatter $threadItemFormatter
) {
parent::__construct( $context, $linkRenderer );
$this->linkBatchFactory = $linkBatchFactory;
$this->threadItemStore = $threadItemStore;
$this->threadItemFormatter = $threadItemFormatter;
}
/**
* @inheritDoc
*/
public function preprocessResults( $result ) {
if ( !$result->numRows() ) {
return;
}
$lb = $this->linkBatchFactory->newLinkBatch();
$itemNames = [];
foreach ( $result as $row ) {
$lb->add( $row->sub_namespace, $row->sub_title );
$itemNames[] = $row->sub_item;
}
$lb->execute();
// Increased limit to allow finding and skipping over some bad permalinks
$threadItems = $this->threadItemStore->findNewestRevisionsByName( $itemNames, $this->mLimit * 5 );
foreach ( $threadItems as $threadItem ) {
$this->threadItemsByName[ $threadItem->getName() ][] = $threadItem;
}
}
/**
* @inheritDoc
*/
protected function getFieldNames() {
return [
'_topic' => $this->msg( 'discussiontools-topicsubscription-pager-topic' )->text(),
'_page' => $this->msg( 'discussiontools-topicsubscription-pager-page' )->text(),
'sub_created' => $this->msg( 'discussiontools-topicsubscription-pager-created' )->text(),
'sub_notified' => $this->msg( 'discussiontools-topicsubscription-pager-notified' )->text(),
'_unsubscribe' => $this->msg( 'discussiontools-topicsubscription-pager-actions' )->text(),
];
}
/**
* @inheritDoc
*/
public function formatValue( $field, $value ) {
/** @var stdClass $row */
$row = $this->mCurrentRow;
switch ( $field ) {
case '_topic':
return $this->formatValueTopic( $row );
case '_page':
return $this->formatValuePage( $row );
case 'sub_created':
return htmlspecialchars( $this->getLanguage()->userTimeAndDate( $value, $this->getUser() ) );
case 'sub_notified':
return $value ?
htmlspecialchars( $this->getLanguage()->userTimeAndDate( $value, $this->getUser() ) ) :
$this->msg( 'discussiontools-topicsubscription-pager-notified-never' )->escaped();
case '_unsubscribe':
$title = Title::makeTitleSafe( $row->sub_namespace, $row->sub_title );
if ( !$title ) {
// Handle invalid titles (T345648)
// The title isn't checked when unsubscribing, as long as it's a valid title,
// so specify something to make it possible to unsubscribe from the buggy entries.
$title = Title::newMainPage();
}
return (string)new OOUI\ButtonWidget( [
'label' => $this->msg( 'discussiontools-topicsubscription-pager-unsubscribe-button' )->text(),
'classes' => [ 'ext-discussiontools-special-unsubscribe-button' ],
'framed' => false,
'flags' => [ 'destructive' ],
'data' => [
'item' => $row->sub_item,
'title' => $title->getPrefixedText(),
],
'href' => $title->getLinkURL( [
'action' => 'dtunsubscribe',
'commentname' => $row->sub_item,
] ),
'infusable' => true,
] );
default:
throw new InvalidArgumentException( "Unknown field '$field'" );
}
}
/**
* Format items as a HTML list, unless there's just one item, in which case return it unwrapped.
* @param string[] $list HTML
* @return string HTML
*/
private function maybeFormatAsList( array $list ): string {
if ( count( $list ) === 1 ) {
return $list[0];
} else {
foreach ( $list as &$item ) {
$item = Html::rawElement( 'li', [], $item );
}
return Html::rawElement( 'ul', [], implode( '', $list ) );
}
}
private function formatValuePage( \stdClass $row ): string {
$linkRenderer = $this->getLinkRenderer();
if ( isset( $this->threadItemsByName[ $row->sub_item ] ) ) {
$items = [];
foreach ( $this->threadItemsByName[ $row->sub_item ] as $threadItem ) {
if ( $threadItem->isCanonicalPermalink() ) {
$items[] = $this->threadItemFormatter->formatLine( $threadItem, $this );
}
}
if ( $items ) {
return $this->maybeFormatAsList( $items );
}
// Found items in the permalink database, but they're not good permalinks.
// TODO: We could link to the full list on Special:FindComment here
// (but we don't link it from the mw.notify message either, at the moment).
}
// Permalink not available - display a plain link to the page title at the time of subscription
$title = Title::makeTitleSafe( $row->sub_namespace, $row->sub_title );
if ( !$title ) {
// Handle invalid titles (T345648)
return Html::element( 'span', [ 'class' => 'mw-invalidtitle' ],
Linker::getInvalidTitleDescription(
$this->getContext(), $row->sub_namespace, $row->sub_title )
);
}
return $linkRenderer->makeLink( $title );
}
private function formatValueTopic( \stdClass $row ): string {
$linkRenderer = $this->getLinkRenderer();
$sectionText = $row->sub_section;
$sectionLink = $row->sub_section;
// Detect truncated section titles: either intentionally truncated by SubscriptionStore,
// or incorrect multibyte truncation of old entries (T345648).
$last = mb_substr( $sectionText, -1 );
if ( $last !== '' && ( $last === "\x1f" || mb_ord( $last ) === false ) ) {
$sectionText = substr( $sectionText, 0, -strlen( $last ) ) . $this->msg( 'ellipsis' )->text();
$sectionLink = null;
}
if ( str_starts_with( $row->sub_item, 'p-topics-' ) ) {
return '<em>' .
$this->msg( 'discussiontools-topicsubscription-pager-newtopics-label' )->escaped() .
'</em>';
}
if ( isset( $this->threadItemsByName[ $row->sub_item ] ) ) {
$items = [];
foreach ( $this->threadItemsByName[ $row->sub_item ] as $threadItem ) {
if ( $threadItem->isCanonicalPermalink() ) {
// TODO: Can we extract the current topic title out of $threadItem->getId() sometimes,
// instead of always using the topic title at the time of subscription? (T295431)
$items[] = $this->threadItemFormatter->makeLink( $threadItem, $sectionText );
}
}
if ( $items ) {
return $this->maybeFormatAsList( $items );
}
// Found items in the permalink database, but they're not good permalinks.
// TODO: We could link to the full list on Special:FindComment here
// (but we don't link it from the mw.notify message either, at the moment).
}
// Permalink not available - display a plain link to the section at the time of subscription
if ( !$sectionLink ) {
// We can't link to the section correctly, since the only link we have is truncated
return htmlspecialchars( $sectionText );
}
$titleSection = Title::makeTitleSafe( $row->sub_namespace, $row->sub_title, $sectionLink );
if ( !$titleSection ) {
// Handle invalid titles of any other kind, just in case
return htmlspecialchars( $sectionText );
}
return $linkRenderer->makeLink( $titleSection, $sectionText );
}
/**
* @inheritDoc
*/
protected function getCellAttrs( $field, $value ) {
$attrs = parent::getCellAttrs( $field, $value );
if ( $field === '_unsubscribe' ) {
$attrs['style'] = 'text-align: center;';
}
return $attrs;
}
/**
* @inheritDoc
*/
public function getQueryInfo() {
return [
'tables' => [
'discussiontools_subscription',
],
'fields' => [
'sub_id',
'sub_item',
'sub_namespace',
'sub_title',
'sub_section',
'sub_created',
'sub_notified',
],
'conds' => [
'sub_user' => $this->getUser()->getId(),
$this->getDatabase()->expr( 'sub_state', '!=', SubscriptionStore::STATE_UNSUBSCRIBED ),
],
];
}
/**
* @inheritDoc
*/
public function getDefaultSort() {
return 'sub_created';
}
/**
* @inheritDoc
*/
public function getDefaultDirections() {
return static::DIR_DESCENDING;
}
/**
* @inheritDoc
*/
public function getIndexField() {
return [ static::INDEX_FIELDS[$this->mSort] ];
}
/**
* @inheritDoc
*/
protected function isFieldSortable( $field ) {
// Hide the sort button for "Topic" as it is more accurately shown as "Created"
return isset( static::INDEX_FIELDS[$field] ) && $field !== '_topic';
}
}