mediawiki-skins-Citizen/includes/CitizenHooks.php

<?php
/**
 * Citizen - A responsive skin developed for the Star Citizen Wiki
 *
 * This file is part of Citizen.
 *
 * Citizen is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Citizen is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Citizen.  If not, see <https://www.gnu.org/licenses/>.
 *
 * @file
 */

namespace Citizen;

use ConfigException;
use MediaWiki\MediaWikiServices;
use RequestContext;
use ResourceLoaderContext;
use ThumbnailImage;
use User;

/**
 * Hook handlers for Citizen skin.
 *
 * Hook handler method names should be in the form of:
 *    on<HookName>()
 */
class CitizenHooks {
	/**
	 * ResourceLoaderGetConfigVars hook handler for setting a config variable
	 * @see https://www.mediawiki.org/wiki/Manual:Hooks/ResourceLoaderGetConfigVars
	 *
	 * @param array &$vars Array of variables to be added into the output of the startup module.
	 * @return bool
	 */
	public static function onResourceLoaderGetConfigVars( &$vars ) {
		try {
			$vars['wgCitizenSearchDescriptionSource'] = self::getSkinConfig( 'CitizenSearchDescriptionSource' );
		} catch ( ConfigException $e ) {
			// Should not happen
			$vars['wgCitizenSearchDescriptionSource'] = 'textextracts';
		}

		try {
			$vars['wgCitizenMaxSearchResults'] = self::getSkinConfig( 'CitizenMaxSearchResults' );
		} catch ( ConfigException $e ) {
			// Should not happen
			$vars['wgCitizenMaxSearchResults'] = 6;
		}

		try {
			$vars['wgCitizenEnableSearch'] = self::getSkinConfig( 'CitizenEnableSearch' );
		} catch ( ConfigException $e ) {
			// Should not happen
			$vars['wgCitizenEnableSearch'] = true;
		}

		return true;
	}

	/**
	 * SkinPageReadyConfig hook handler
	 *
	 * Replace searchModule provided by skin.
	 *
	 * @since 1.35
	 * @param ResourceLoaderContext $context
	 * @param mixed[] &$config Associative array of configurable options
	 * @return void This hook must not abort, it must return no value
	 */
	public static function onSkinPageReadyConfig(
		ResourceLoaderContext $context,
		array &$config
	) {
		// It's better to exit before any additional check
		if ( $context->getSkin() !== 'citizen' ) {
			return;
		}

		// Tell the `mediawiki.page.ready` module not to wire up search.
		$config['search'] = false;
	}

	/**
	 * Lazyload images
	 * Modified from the Lazyload extension
	 * Looks for thumbnail and swap src to data-src
	 *
	 * @param ThumbnailImage $thumbnail
	 * @param array &$attribs
	 * @param array &$linkAttribs
	 * @return bool
	 */
	public static function onThumbnailBeforeProduceHTML( $thumbnail, &$attribs, &$linkAttribs ) {
		try {
			$lazyloadEnabled = self::getSkinConfig( 'CitizenEnableLazyload' );
		} catch ( ConfigException $e ) {
			$lazyloadEnabled = false;
		}

		// Replace thumbnail if lazyload is enabled
		if ( $lazyloadEnabled === true ) {
			$file = $thumbnail->getFile();

			if ( $file !== null ) {
				$request = RequestContext::getMain()->getRequest();

				if ( defined( 'MW_API' ) && $request->getVal( 'action' ) === 'parse' ) {
					return true;
				}

				// Set lazy class for the img
				if ( isset( $attribs['class'] ) ) {
					$attribs['class'] .= ' lazy';
				} else {
					$attribs['class'] = 'lazy';
				}

				// Native API
				$attribs['loading'] = 'lazy';

				$attribs['data-src'] = $attribs['src'];
				$attribs['src'] = 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D';

				if ( isset( $attribs['srcset'] ) ) {
					$attribs['data-srcset'] = $attribs['srcset'];
					$attribs['srcset'] = '';
				}
			}
		}

		return true;
	}

	/**
	 * Get a skin configuration variable.
	 *
	 * @param string $name Name of configuration option.
	 * @return mixed Value configured.
	 * @throws \ConfigException
	 */
	private static function getSkinConfig( $name ) {
		return MediaWikiServices::getInstance()->getConfigFactory()->makeConfig( 'Citizen' )->get( $name );
	}

	/**
	 * Add Citizen preferences to the user's Special:Preferences page directly underneath skins.
	 * Based on Vector's implementation
	 *
	 * @param User $user User whose preferences are being modified.
	 * @param array[] &$prefs Preferences description array, to be fed to a HTMLForm object.
	 */
	public static function onGetPreferences( $user, &$prefs ) {
		// Preferences to add.
		$citizenPrefs = [
			'CitizenThemeUser' => [
				'type' => 'select',
				// Droptown title
				'label-message' => 'prefs-citizen-theme-label',
				// The tab location and title of the section to insert the checkbox. The bit after the slash
				// indicates that a prefs-skin-prefs string will be provided.
				'section' => 'rendering/skin/skin-prefs',
				'options' => [
					wfMessage( 'prefs-citizen-theme-option-auto' )->escaped() => 'auto',
					wfMessage( 'prefs-citizen-theme-option-light' )->escaped() => 'light',
					wfMessage( 'prefs-citizen-theme-option-dark' )->escaped() => 'dark',
				],
				'default' => 'auto',
				// Only show this section when the Citizen skin is checked. The JavaScript client also uses
				// this state to determine whether to show or hide the whole section.
				'hide-if' => [ '!==', 'wpskin', 'citizen' ],
			],
		];

		// Seek the skin preference section to add Citizen preferences just below it.
		$skinSectionIndex = array_search( 'skin', array_keys( $prefs ) );
		if ( $skinSectionIndex !== false ) {
			// Skin preference section found. Inject Citizen skin-specific preferences just below it.
			// This pattern can be found in Popups too. See T246162.
			$citizenSectionIndex = $skinSectionIndex + 1;
			$prefs = array_slice( $prefs, 0, $citizenSectionIndex, true )
				+ $citizenPrefs
				+ array_slice( $prefs, $citizenSectionIndex, null, true );
		} else {
			// Skin preference section not found. Just append Citizen skin-specific preferences.
			$prefs += $citizenPrefs;
		}
	}

	/**
	 * Delete the override cookie if the theme was changed through the user preferences
	 *
	 * @param array $formData Array of user submitted data
	 * @param \HTMLForm $form HTMLForm object, also a ContextSource
	 * @param User $user User with preferences to be saved
	 * @param bool &$result Boolean indicating success
	 * @param array $oldUserOptions Array with user's old options (before save)
	 * @return bool|void True or no return value to continue or false to abort
	 */
	public static function onPreferencesFormPreSave( $formData, $form, $user, &$result, $oldUserOptions	) {
		if ( isset( $formData['CitizenThemeUser'] ) && $formData['CitizenThemeUser'] !== 'auto' ) {
			// Reset override cookie from theme toggle
			$form->getOutput()->getRequest()->response()->setCookie( 'skin-citizen-theme-override', null );
		}
	}
}