mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Echo
synced 2024-12-01 02:46:46 +00:00
395 lines
11 KiB
PHP
395 lines
11 KiB
PHP
<?php
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/**
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* Class that returns structured data based
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* on the provided event.
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*/
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// @todo: once PHP5.3 is no longer supported, this can implement JsonSerializable
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abstract class EchoEventPresentationModel {
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/**
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* Recommended length of usernames included in messages
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*/
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const USERNAME_RECOMMENDED_LENGTH = 30;
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/**
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* Recommended length of page names included in messages
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*/
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const PAGE_NAME_RECOMMENDED_LENGTH = 50;
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/**
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* Recommended length of section titles included in messages
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*/
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const SECTION_TITLE_RECOMMENDED_LENGTH = 30;
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/**
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* @var EchoEvent
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*/
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protected $event;
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/**
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* @var Language
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*/
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protected $language;
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/**
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* @var string
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*/
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protected $type;
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/**
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* @var User for permissions checking
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*/
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private $user;
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/**
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* @var EchoEvent[]|null
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*/
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private $bundledEvents;
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/**
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* @param EchoEvent $event
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* @param Language|string $language
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* @param User $user Only used for permissions checking and GENDER
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*/
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protected function __construct( EchoEvent $event, $language, User $user ) {
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$this->event = $event;
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$this->type = $event->getType();
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$this->language = wfGetLangObj( $language );
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$this->user = $user;
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}
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/**
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* Convenience function to detect whether the event type
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* has been updated to use the presentation model system
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*
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* @param string $type event type
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* @return bool
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*/
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public static function supportsPresentationModel( $type ) {
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global $wgEchoNotifications;
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return isset( $wgEchoNotifications[$type]['presentation-model'] );
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}
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/**
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* @param EchoEvent $event
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* @param Language|string $language
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* @param User $user
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* @return EchoEventPresentationModel
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*/
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public static function factory( EchoEvent $event, $language, User $user ) {
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global $wgEchoNotifications;
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// @todo don't depend upon globals
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$class = $wgEchoNotifications[$event->getType()]['presentation-model'];
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return new $class( $event, $language, $user );
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}
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/**
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* Equivalent to IContextSource::msg for the current
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* language
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*
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* @return Message
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*/
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protected function msg( /* ,,, */ ) {
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/**
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* @var Message $msg
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*/
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$msg = call_user_func_array( 'wfMessage', func_get_args() );
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$msg->inLanguage( $this->language );
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return $msg;
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}
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/**
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* @return EchoEvent[]
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*/
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final protected function getBundledEvents() {
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if ( !$this->event->getBundleHash() ) {
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return array();
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}
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if ( $this->bundledEvents !== null ) {
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return $this->bundledEvents;
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}
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// FIXME: We really shouldn't be making db queries like this
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// in the presentation model
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$eventMapper = new EchoEventMapper();
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$this->bundledEvents = $eventMapper->fetchByUserBundleHash(
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$this->user,
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$this->event->getBundleHash()
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// default params: web, DESC, limit=250
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);
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return $this->bundledEvents;
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}
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/**
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* This method returns true when there are bundled notifications, even if they are all
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* in the same group according to getBundleGrouping(). For presentation purposes, you may
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* want to check if getBundleCount( true, $yourCallback ) > 1 instead.
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*
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* @return bool Whether there are other notifications bundled with this one.
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*/
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final protected function isBundled() {
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return $this->getBundleCount() > 1;
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}
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/**
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* Count the number of event groups in this bundle.
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*
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* By default, each event is in its own group, and this method returns the number of events.
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* To group events differently, pass $groupCallback. For example, to group events with the
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* same title together, use $callback = function ( $event ) { return $event->getTitle()->getPrefixedText(); }
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*
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* If $includeCurrent is false, all events in the same group as the current one will be ignored.
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*
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* @param bool $includeCurrent Include the current event (and its group)
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* @param callable $groupCallback Callback that takes an EchoEvent and returns a grouping value
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* @return int Number of bundled events or groups
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* @throws InvalidArgumentException
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*/
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final protected function getBundleCount( $includeCurrent = true, $groupCallback = null ) {
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$events = array_merge( $this->getBundledEvents(), array( $this->event ) );
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if ( $groupCallback ) {
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if ( !is_callable( $groupCallback ) ) {
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// If we pass an invalid callback to array_map(), it'll just throw a warning
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// and return NULL, so $count ends up being 0 or -1. Instead of doing that,
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// throw an exception.
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throw new InvalidArgumentException( 'Invalid callback passed to getBundleCount' );
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}
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$events = array_unique( array_map( $groupCallback, $events ) );
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}
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$count = count( $events );
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if ( !$includeCurrent ) {
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$count--;
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}
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return $count;
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}
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/**
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* Return the count of notifications bundled together.
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*
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* For parameters, see getBundleCount().
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*
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* @param bool $includeCurrent
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* @param callable $groupCallback
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* @return array ['number for display', 'number for PLURAL']
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*/
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final protected function getNotificationCountForOutput( $includeCurrent = true, $groupCallback = null ) {
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global $wgEchoMaxNotificationCount;
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$count = $this->getBundleCount( $includeCurrent, $groupCallback );
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if ( $count > $wgEchoMaxNotificationCount ) {
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return array(
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$this->msg( 'echo-notification-count' )->numParams( $wgEchoMaxNotificationCount )->text(),
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$wgEchoMaxNotificationCount
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);
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} else {
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return array(
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$this->language->formatNum( $count ),
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$count
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);
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}
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}
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/**
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* @return string The symbolic icon name as defined in $wgEchoNotificationIcons
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*/
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abstract public function getIconType();
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/**
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* @return string Timestamp the event occurred at
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*/
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final public function getTimestamp() {
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return $this->event->getTimestamp();
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}
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/**
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* Helper for EchoEvent::userCan
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*
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* @param int $type Revision::DELETED_* constant
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* @return bool
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*/
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final protected function userCan( $type ) {
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return $this->event->userCan( $type, $this->user );
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}
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/**
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* @return array|bool ['wikitext to display', 'username for GENDER'], false if no agent
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*
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* We have to display wikitext so we can add CSS classes for revision deleted user.
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* The goal of this function is for callers not to worry about whether
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* the user is visible or not.
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* @par Example:
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* @code
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* list( $formattedName, $genderName ) = $this->getAgentForOutput();
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* $msg->params( $formattedName, $genderName );
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* @endcode
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*/
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final protected function getAgentForOutput() {
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$agent = $this->event->getAgent();
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if ( !$agent ) {
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return false;
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}
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if ( $this->userCan( Revision::DELETED_USER ) ) {
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// Not deleted
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return array( $this->getTruncatedUsername( $agent ), $agent->getName() );
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} else {
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// Deleted/hidden
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$msg = $this->msg( 'rev-deleted-user' )->plain();
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// HACK: Pass an invalid username to GENDER to force the default
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return array( '<span class="history-deleted">' . $msg . '</span>', '[]' );
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}
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}
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/**
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* Return a message with the given key and the agent's
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* formatted name and name for GENDER as 1st and
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* 2nd parameters.
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* @param string $key
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* @return Message
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*/
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final protected function getMessageWithAgent( $key ) {
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$msg = $this->msg( $key );
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list( $formattedName, $genderName ) = $this->getAgentForOutput();
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$msg->params( $formattedName, $genderName );
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return $msg;
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}
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/**
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* Get the viewing user's name for usage in GENDER
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*
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* @return string
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*/
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final protected function getViewingUserForGender() {
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return $this->user->getName();
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}
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/**
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* @return array|null Link object to the user's page or Special:Contributions for anon users.
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* Can be used for primary or secondary links.
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* Same format as secondary link.
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* Returns null if the current user cannot see the agent.
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*/
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final protected function getAgentLink() {
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$agent = $this->event->getAgent();
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if ( !$this->userCan( Revision::DELETED_USER ) ) {
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return null;
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}
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if ( !$agent ) {
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throw new DomainException(
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"No agent associated with notification with id '{$this->event->getId()}' of type '{$this->type}'" );
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}
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$url = $agent->isAnon()
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? SpecialPage::getTitleFor( 'Contributions', $agent->getName() )->getFullURL()
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: $agent->getUserPage()->getFullURL();
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return array(
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'url' => $url,
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'label' => $agent->getName(),
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'description' => '',
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'icon' => 'userAvatar',
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'prioritized' => true,
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);
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}
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/**
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* To be overridden by subclasses if they are unable to render the
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* notification, for example when a page is deleted.
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* If this function returns false, no other methods will be called
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* on the object.
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*
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* @return bool
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*/
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public function canRender() {
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return true;
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}
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/**
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* @return string Message key that will be used in getHeaderMessage
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*/
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protected function getHeaderMessageKey() {
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return "notification-header-{$this->type}";
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}
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/**
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* Get a message object and add the performer's name as
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* a parameter. It is expected that subclasses will override
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* this.
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*
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* @return Message
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*/
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public function getHeaderMessage() {
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return $this->getMessageWithAgent( $this->getHeaderMessageKey() );
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}
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/**
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* Get a message for the notification's body, false if it has no body
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*
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* @return bool|Message
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*/
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public function getBodyMessage() {
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return false;
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}
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/**
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* Array of primary link details, with possibly-relative URL & label.
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*
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* @return array|bool Array of link data, or false for no link:
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* ['url' => (string) url, 'label' => (string) link text (non-escaped)]
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*/
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abstract public function getPrimaryLink();
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/**
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* Array of secondary link details, including possibly-relative URLs, label,
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* description & icon name.
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*
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* @return array Array of links in the format of:
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* [['url' => (string) url,
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* 'label' => (string) link text (non-escaped),
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* 'description' => (string) descriptive text (non-escaped),
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* 'icon' => (bool|string) symbolic icon name (or false if there is none),
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* 'prioritized' => (bool) true if the link should be outside the
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* action menu, false for inside)],
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* ...]
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*
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* Note that you should call array_values(array_filter()) on the
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* result of this function (FIXME).
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*/
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public function getSecondaryLinks() {
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return array();
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}
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/**
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* @return array
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* @throws TimestampException
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*/
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public function jsonSerialize() {
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$body = $this->getBodyMessage();
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return array(
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'header' => $this->getHeaderMessage()->parse(),
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'body' => $body ? $body->parse() : '',
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'icon' => $this->getIconType(),
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'links' => array(
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'primary' => $this->getPrimaryLink() ?: array(),
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'secondary' => array_values( array_filter( $this->getSecondaryLinks() ) ),
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),
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);
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}
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protected function getTruncatedUsername( User $user ) {
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return $this->language->truncate( $user->getName(), self::USERNAME_RECOMMENDED_LENGTH );
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}
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protected function getTruncatedTitleText( Title $title, $includeNamespace = false ) {
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$text = $includeNamespace ? $title->getPrefixedText() : $title->getText();
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return $this->language->truncate( $text, self::PAGE_NAME_RECOMMENDED_LENGTH );
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}
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}
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