<?php
/**
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

use MediaWiki\Context\ContextSource;
use MediaWiki\HookContainer\ProtectedHookAccessorTrait;
use MediaWiki\Html\Html;
use MediaWiki\Linker\Linker;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Title\Title;

/**
 * Builds the image revision log shown on image pages
 *
 * @ingroup Media
 */
class ImageHistoryList extends ContextSource {
	use ProtectedHookAccessorTrait;

	/**
	 * @var Title
	 */
	protected $title;

	/**
	 * @var File
	 */
	protected $img;

	/**
	 * @var ImagePage
	 */
	protected $imagePage;

	/**
	 * @var File
	 */
	protected $current;

	protected $repo, $showThumb;
	protected $preventClickjacking = false;

	/**
	 * @param ImagePage $imagePage
	 */
	public function __construct( $imagePage ) {
		$context = $imagePage->getContext();
		$this->current = $imagePage->getPage()->getFile();
		$this->img = $imagePage->getDisplayedFile();
		$this->title = $imagePage->getTitle();
		$this->imagePage = $imagePage;
		$this->showThumb = $context->getConfig()->get( MainConfigNames::ShowArchiveThumbnails ) &&
			$this->img->canRender();
		$this->setContext( $context );
	}

	/**
	 * @return ImagePage
	 */
	public function getImagePage() {
		return $this->imagePage;
	}

	/**
	 * @return File
	 */
	public function getFile() {
		return $this->img;
	}

	/**
	 * @return string
	 */
	public function beginImageHistoryList() {
		// Styles for class=history-deleted
		$this->getOutput()->addModuleStyles( 'mediawiki.interface.helpers.styles' );

		$html = '';
		$canDelete = $this->current->isLocal() &&
			$this->getAuthority()->isAllowedAny( 'delete', 'deletedhistory' );

		foreach ( [
			'',
			$canDelete ? '' : null,
			'filehist-datetime',
			$this->showThumb ? 'filehist-thumb' : null,
			'filehist-dimensions',
			'filehist-user',
			'filehist-comment',
		] as $key ) {
			if ( $key !== null ) {
				$html .= Html::element( 'th', [], $key ? $this->msg( $key )->text() : '' );
			}
		}

		return Html::openElement( 'table', [ 'class' => 'wikitable filehistory' ] ) . "\n"
			. Html::rawElement( 'tr', [], $html ) . "\n";
	}

	/**
	 * @return string
	 */
	public function endImageHistoryList() {
		return Html::closeElement( 'table' ) . "\n";
	}

	/**
	 * @internal
	 * @param bool $iscur
	 * @param File $file
	 * @param string $formattedComment
	 * @return string
	 */
	public function imageHistoryLine( $iscur, $file, $formattedComment ) {
		$user = $this->getUser();
		$lang = $this->getLanguage();
		$linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
		$timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
		// @phan-suppress-next-line PhanUndeclaredMethod
		$img = $iscur ? $file->getName() : $file->getArchiveName();
		$uploader = $file->getUploader( File::FOR_THIS_USER, $user );

		$local = $this->current->isLocal();
		$row = '';

		// Deletion link
		if ( $local && ( $this->getAuthority()->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
			$row .= Html::openElement( 'td' );
			# Link to hide content. Don't show useless link to people who cannot hide revisions.
			if ( !$iscur && $this->getAuthority()->isAllowed( 'deleterevision' ) ) {
				// If file is top revision, is missing or locked from this user, don't link
				if ( !$file->userCan( File::DELETED_RESTRICTED, $user ) || !$file->exists() ) {
					$row .= Html::check( 'deleterevisions', false, [ 'disabled' => 'disabled' ] );
				} else {
					$row .= Html::check( 'ids[' . explode( '!', $img, 2 )[0] . ']', false );
				}
				if ( $this->getAuthority()->isAllowed( 'delete' ) ) {
					$row .= ' ';
				}
			}
			# Link to remove from history
			if ( $this->getAuthority()->isAllowed( 'delete' ) ) {
				if ( $file->exists() ) {
					$row .= $linkRenderer->makeKnownLink(
						$this->title,
						$this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->text(),
						[],
						[ 'action' => 'delete', 'oldimage' => $iscur ? null : $img ]
					);
				} else {
					// T244567: Non-existing file can not be deleted.
					$row .= $this->msg( 'filehist-missing' )->escaped();
				}

			}
			$row .= Html::closeElement( 'td' );
		}

		// Reversion link/current indicator
		$row .= Html::openElement( 'td' );
		if ( $iscur ) {
			$row .= $this->msg( 'filehist-current' )->escaped();
		} elseif ( $local && $this->getAuthority()->probablyCan( 'edit', $this->title )
			&& $this->getAuthority()->probablyCan( 'upload', $this->title )
		) {
			if ( $file->isDeleted( File::DELETED_FILE ) ) {
				$row .= $this->msg( 'filehist-revert' )->escaped();
			} elseif ( !$file->exists() ) {
				// T328112: Lost file, in this case there's no version to revert back to.
				$row .= $this->msg( 'filehist-missing' )->escaped();
			} else {
				$row .= $linkRenderer->makeKnownLink(
					$this->title,
					$this->msg( 'filehist-revert' )->text(),
					[],
					[
						'action' => 'revert',
						'oldimage' => $img,
					]
				);
			}
		}
		$row .= Html::closeElement( 'td' );

		// Date/time and image link
		$selected = $file->getTimestamp() === $this->img->getTimestamp();
		$row .= Html::openElement( 'td', [
			'class' => $selected ? 'filehistory-selected' : null,
			'style' => 'white-space: nowrap;'
		] );
		if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
			# Don't link to unviewable files
			$row .= Html::element( 'span', [ 'class' => 'history-deleted' ],
				$lang->userTimeAndDate( $timestamp, $user )
			);
		} elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
			$timeAndDate = $lang->userTimeAndDate( $timestamp, $user );
			if ( $local ) {
				$this->setPreventClickjacking( true );
				# Make a link to review the image
				$url = $linkRenderer->makeKnownLink(
					SpecialPage::getTitleFor( 'Revisiondelete' ),
					$timeAndDate,
					[],
					[
						'target' => $this->title->getPrefixedText(),
						'file' => $img,
						'token' => $user->getEditToken( $img )
					]
				);
			} else {
				$url = htmlspecialchars( $timeAndDate );
			}
			$row .= Html::rawElement( 'span', [ 'class' => 'history-deleted' ], $url );
		} elseif ( !$file->exists() ) {
			$row .= Html::element( 'span', [ 'class' => 'mw-file-missing' ],
				$lang->userTimeAndDate( $timestamp, $user )
			);
		} else {
			$url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
			$row .= Html::element( 'a', [ 'href' => $url ],
				$lang->userTimeAndDate( $timestamp, $user )
			);
		}
		$row .= Html::closeElement( 'td' );

		// Thumbnail
		if ( $this->showThumb ) {
			$row .= Html::rawElement( 'td', [],
				$this->getThumbForLine( $file, $iscur ) ?? $this->msg( 'filehist-nothumb' )->escaped()
			);
		}

		// Image dimensions + size
		$row .= Html::openElement( 'td' );
		$row .= htmlspecialchars( $file->getDimensionsString() );
		$row .= $this->msg( 'word-separator' )->escaped();
		$row .= Html::element( 'span', [ 'style' => 'white-space: nowrap;' ],
			$this->msg( 'parentheses' )->sizeParams( $file->getSize() )->text()
		);
		$row .= Html::closeElement( 'td' );

		// Uploading user
		$row .= Html::openElement( 'td' );
		// Hide deleted usernames
		if ( $uploader && $local ) {
			$row .= Linker::userLink( $uploader->getId(), $uploader->getName() );
			$row .= Html::rawElement( 'span', [ 'style' => 'white-space: nowrap;' ],
				Linker::userToolLinks( $uploader->getId(), $uploader->getName() )
			);
		} elseif ( $uploader ) {
			$row .= htmlspecialchars( $uploader->getName() );
		} else {
			$row .= Html::element( 'span', [ 'class' => 'history-deleted' ],
				$this->msg( 'rev-deleted-user' )->text()
			);
		}
		$row .= Html::closeElement( 'td' );

		// Don't show deleted descriptions
		if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
			$row .= Html::rawElement( 'td', [],
				Html::element( 'span', [ 'class' => 'history-deleted' ],
					$this->msg( 'rev-deleted-comment' )->text()
				)
			);
		} else {
			$contLang = MediaWikiServices::getInstance()->getContentLanguage();
			$row .= Html::rawElement( 'td', [ 'dir' => $contLang->getDir() ], $formattedComment );
		}

		$rowClass = null;
		$this->getHookRunner()->onImagePageFileHistoryLine( $this, $file, $row, $rowClass );

		return Html::rawElement( 'tr', [ 'class' => $rowClass ], $row ) . "\n";
	}

	/**
	 * @param File $file
	 * @param bool $iscur
	 * @return string|null
	 */
	protected function getThumbForLine( $file, $iscur ) {
		$user = $this->getUser();
		if ( !$file->allowInlineDisplay() ||
			$file->isDeleted( File::DELETED_FILE ) ||
			!$file->userCan( File::DELETED_FILE, $user )
		) {
			return null;
		}

		$thumbnail = $file->transform(
			[
				'width' => '120',
				'height' => '120',
				'isFilePageThumb' => $iscur  // old revisions are already versioned
			]
		);
		if ( !$thumbnail ) {
			return null;
		}

		$lang = $this->getLanguage();
		$timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
		$alt = $this->msg(
			'filehist-thumbtext',
			$lang->userTimeAndDate( $timestamp, $user ),
			$lang->userDate( $timestamp, $user ),
			$lang->userTime( $timestamp, $user )
		)->text();
		return $thumbnail->toHtml( [ 'alt' => $alt, 'file-link' => true, 'loading' => 'lazy' ] );
	}

	/**
	 * @param bool $enable
	 * @deprecated since 1.38, use ::setPreventClickjacking() instead
	 */
	protected function preventClickjacking( $enable = true ) {
		$this->preventClickjacking = $enable;
	}

	/**
	 * @param bool $enable
	 * @since 1.38
	 */
	protected function setPreventClickjacking( bool $enable ) {
		$this->preventClickjacking = $enable;
	}

	/**
	 * @return bool
	 */
	public function getPreventClickjacking() {
		return $this->preventClickjacking;
	}
}
