<?php
/**
 * DynamicPageList3
 * DPL Article Class
 *
 * @author		IlyaHaykinson, Unendlich, Dangerville, Algorithmix, Theaitetos, Alexia E. Smith, Universal Omega
 * @license		GPL-2.0-or-later
 * @package		DynamicPageList3
 *
 */
namespace DPL;

use User;

class Article {
	/**
	 * Title
	 *
	 * @var object
	 */
	public $mTitle = null;

	/**
	 * Namespace ID
	 *
	 * @var string
	 */
	public $mNamespace = -1;

	/**
	 * Page ID
	 *
	 * @var int
	 */
	public $mID = 0;

	/**
	 * Selected title of initial page.
	 *
	 * @var string
	 */
	public $mSelTitle = null;

	/**
	 * Selected namespace ID of initial page.
	 *
	 * @var string
	 */
	public $mSelNamespace = -1;

	/**
	 * Selected title of image.
	 *
	 * @var string
	 */
	public $mImageSelTitle = null;

	/**
	 * HTML link to page.
	 *
	 * @var string
	 */
	public $mLink = '';

	/**
	 * External link on the page.
	 *
	 * @var string
	 */
	public $mExternalLink = null;

	/**
	 * First character of the page title.
	 *
	 * @var string
	 */
	public $mStartChar = null;

	/**
	 * Heading (link to the associated page) that page belongs to in the list (default '' means no heading)
	 *
	 * @var string
	 */
	public $mParentHLink = ''; // heading (link to the associated page) that page belongs to in the list (default '' means no heading)

	/**
	 * Category links on the page.
	 *
	 * @var array
	 */
	public $mCategoryLinks = [];

	/**
	 * Category names (without link) in the page.
	 *
	 * @var array
	 */
	public $mCategoryTexts = [];

	/**
	 * Number of times this page has been viewed.
	 *
	 * @var int
	 */
	public $mCounter = null;

	/**
	 * Article length in bytes of wiki text
	 *
	 * @var int
	 */
	public $mSize = null;

	/**
	 * Timestamp depending on the user's request (can be first/last edit, page_touched, ...)
	 *
	 * @var string
	 */
	public $mDate = null;

	/**
	 * Timestamp depending on the user's request, based on user format definition.
	 *
	 * @var string
	 */
	public $myDate = null;

	/**
	 * Revision ID
	 *
	 * @var int
	 */
	public $mRevision = null;

	/**
	 * Link to editor (first/last, depending on user's request) 's page or contributions if not registered.
	 *
	 * @var string
	 */
	public $mUserLink = null;

	/**
	 * Name of editor (first/last, depending on user's request) or contributions if not registered.
	 *
	 * @var string
	 */
	public $mUser = null;

	/**
	 * Edit Summary(Revision Comment)
	 *
	 * @var string
	 */
	public $mComment = null;

	/**
	 * Number of bytes changed.
	 *
	 * @var int
	 */
	public $mContribution = 0;

	/**
	 * Short string indicating the size of a contribution.
	 *
	 * @var string
	 */
	public $mContrib = '';

	/**
	 * User text of who made the changes.
	 *
	 * @var string
	 */
	public $mContributor = null;

	/**
	 * Article Headings - Maps heading to count (# of pages under each heading).
	 *
	 * @var array
	 */
	private static $headings = [];

	/**
	 * Main Constructor
	 *
	 * @access	public
	 * @param	string	Title
	 * @param	integer	Namespace
	 * @return	void
	 */
	public function __construct( $title, $namespace ) {
		$this->mTitle     = $title;
		$this->mNamespace = $namespace;
	}

	/**
	 * Initialize a new instance from a database row.
	 *
	 * @access	public
	 * @param	array	Database Row
	 * @param	object	\DPL\Parameters Object
	 * @param	object	Mediawiki Title Object
	 * @param	integer	Page Namespace ID
	 * @param	string	Page Title as Selected from Query
	 * @return	object	\DPL\Article Object
	 */
	public static function newFromRow( $row, Parameters $parameters, \Title $title, $pageNamespace, $pageTitle ) {
		global $wgLang, $wgContLang;

		$article = new Article( $title, $pageNamespace );

		$revActorName = null;
		if ( isset( $row['revactor_actor'] ) ) {
			$revActorName = User::newFromActorId( $row['revactor_actor'] )->getName();
		}

		$titleText = $title->getText();
		if ( $parameters->getParameter( 'shownamespace' ) === true ) {
			$titleText = $title->getPrefixedText();
		}
		$replaceInTitle = $parameters->getParameter( 'replaceintitle' );
		if ( is_array( $replaceInTitle ) && count( $replaceInTitle ) === 2 ) {
			$titleText = preg_replace( $replaceInTitle[0], $replaceInTitle[1], $titleText );
		}

		//Chop off title if longer than the 'titlemaxlen' parameter.
		if ( $parameters->getParameter( 'titlemaxlen' ) !== null && strlen( $titleText ) > $parameters->getParameter( 'titlemaxlen' ) ) {
			$titleText = substr( $titleText, 0, $parameters->getParameter( 'titlemaxlen' ) ) . '...';
		}
		if ( $parameters->getParameter( 'showcurid' ) === true && isset( $row['page_id'] ) ) {
			$articleLink = '[' . $title->getLinkURL( [ 'curid' => $row['page_id'] ] ) . ' ' . htmlspecialchars( $titleText ) . ']';
		} else {
			$articleLink = '[[' . ( $parameters->getParameter( 'escapelinks' ) && ( $pageNamespace == NS_CATEGORY || $pageNamespace == NS_FILE ) ? ':' : '' ) . $title->getFullText() . '|' . htmlspecialchars( $titleText ) . ']]';
		}

		$article->mLink = $articleLink;

		//get first char used for category-style output
		if ( isset( $row['sortkey'] ) ) {
			$article->mStartChar = $wgContLang->convert( $wgContLang->firstChar( $row['sortkey'] ) );
		} else {
			$article->mStartChar = $wgContLang->convert( $wgContLang->firstChar( $pageTitle ) );
		}

		$article->mID = intval( $row['page_id'] );

		//External link
		if ( isset( $row['el_to'] ) ) {
			$article->mExternalLink = $row['el_to'];
		}

		//SHOW PAGE_COUNTER
		if ( isset( $row['page_counter'] ) ) {
			$article->mCounter = intval( $row['page_counter'] );
		}

		//SHOW PAGE_SIZE
		if ( isset( $row['page_len'] ) ) {
			$article->mSize = intval( $row['page_len'] );
		}
		//STORE initially selected PAGE
		if ( is_array( $parameters->getParameter( 'linksto' ) ) && ( count( $parameters->getParameter( 'linksto' ) ) || count( $parameters->getParameter( 'linksfrom' ) ) ) ) {
			if ( !isset( $row['sel_title'] ) ) {
				$article->mSelTitle     = 'unknown page';
				$article->mSelNamespace = 0;
			} else {
				$article->mSelTitle     = $row['sel_title'];
				$article->mSelNamespace = $row['sel_ns'];
			}
		}

		//STORE selected image
		if ( is_array( $parameters->getParameter( 'imageused' ) ) && count( $parameters->getParameter( 'imageused' ) ) > 0 ) {
			if ( !isset( $row['image_sel_title'] ) ) {
				$article->mImageSelTitle = 'unknown image';
			} else {
				$article->mImageSelTitle = $row['image_sel_title'];
			}
		}

		if ( $parameters->getParameter( 'goal' ) != 'categories' ) {
			//REVISION SPECIFIED
			if ( $parameters->getParameter( 'lastrevisionbefore' ) || $parameters->getParameter( 'allrevisionsbefore' ) || $parameters->getParameter( 'firstrevisionsince' ) || $parameters->getParameter( 'allrevisionssince' ) ) {
				$article->mRevision = $row['revactor_rev'];
				$article->mUser     = $revActorName;
				$article->mDate     = $row['revactor_timestamp'];
			}

			//SHOW "PAGE_TOUCHED" DATE, "FIRSTCATEGORYDATE" OR (FIRST/LAST) EDIT DATE
			if ( $parameters->getParameter( 'addpagetoucheddate' ) ) {
				$article->mDate = $row['page_touched'];
			} elseif ( $parameters->getParameter( 'addfirstcategorydate' ) ) {
				$article->mDate = $row['cl_timestamp'];
			} elseif ( $parameters->getParameter( 'addeditdate' ) && isset( $row['revactor_timestamp'] ) ) {
				$article->mDate = $row['revactor_timestamp'];
			} elseif ( $parameters->getParameter( 'addeditdate' ) && isset( $row['page_touched'] ) ) {
				$article->mDate = $row['page_touched'];
			}

			//Time zone adjustment
			if ( $article->mDate ) {
				$article->mDate = $wgLang->userAdjust( $article->mDate );
			}

			if ( $article->mDate && $parameters->getParameter( 'userdateformat' ) ) {
				//Apply the userdateformat
				$article->myDate = gmdate( $parameters->getParameter( 'userdateformat' ), wfTimeStamp( TS_UNIX, $article->mDate ) );
			}
			// CONTRIBUTION, CONTRIBUTOR
			if ( $parameters->getParameter( 'addcontribution' ) ) {
				$article->mContribution = $row['contribution'];
				$article->mContributor  = User::newFromActorId( $row['contributor'] )->getName();
				$article->mContrib      = substr( '*****************', 0, (int)round( log( $row['contribution'] ) ) );
			}

			//USER/AUTHOR(S)
			// because we are going to do a recursive parse at the end of the output phase
			// we have to generate wiki syntax for linking to a user´s homepage
			if ( $parameters->getParameter( 'adduser' ) || $parameters->getParameter( 'addauthor' ) || $parameters->getParameter( 'addlasteditor' ) ) {
				$article->mUserLink = '[[User:' . $revActorName . '|' . $revActorName . ']]';
				$article->mUser     = $revActorName;
			}

			//CATEGORY LINKS FROM CURRENT PAGE
			if ( $parameters->getParameter( 'addcategories' ) && ( $row['cats'] ) ) {
				$artCatNames = explode( ' | ', $row['cats'] );
				foreach ( $artCatNames as $artCatName ) {
					$article->mCategoryLinks[] = '[[:Category:' . $artCatName . '|' . str_replace( '_', ' ', $artCatName ) . ']]';
					$article->mCategoryTexts[] = str_replace( '_', ' ', $artCatName );
				}
			}
			// PARENT HEADING (category of the page, editor (user) of the page, etc. Depends on ordermethod param)
			if ( $parameters->getParameter( 'headingmode' ) != 'none' ) {
				switch ( $parameters->getParameter( 'ordermethod' )[0] ) {
					case 'category':
						//Count one more page in this heading
						self::$headings[$row['cl_to']] = ( isset( self::$headings[$row['cl_to']] ) ? self::$headings[$row['cl_to']] + 1 : 1 );
						if ( $row['cl_to'] == '' ) {
							//uncategorized page (used if ordermethod=category,...)
							$article->mParentHLink = '[[:Special:Uncategorizedpages|' . wfMessage( 'uncategorizedpages' ) . ']]';
						} else {
							$article->mParentHLink = '[[:Category:' . $row['cl_to'] . '|' . str_replace( '_', ' ', $row['cl_to'] ) . ']]';
						}
						break;
					case 'user':
						self::$headings[$revActorName] = ( isset( self::$headings[$revActorName] ) ? self::$headings[$revActorName] + 1 : 1 );
						if ( $row['revactor_actor'] == 0 ) { //anonymous user
							$article->mParentHLink = '[[User:' . $revActorName . '|' . $revActorName . ']]';
						} else {
							$article->mParentHLink = '[[User:' . $revActorName . '|' . $revActorName . ']]';
						}
						break;
				}
			}
		}

		return $article;
	}

	/**
	 * Returns all heading information processed from all newly instantiated article objects.
	 *
	 * @access	public
	 * @return	array	Headings
	 */
	public static function getHeadings() {
		return self::$headings;
	}

	/**
	 * Reset the headings to their initial state.
	 * Ideally this Article class should not exist and be handled by the built in MediaWiki class.
	 * Bug: https://jira/browse/HYD-913
	 *
	 * @access	public
	 * @return	void
	 */
	public static function resetHeadings() {
		self::$headings = [];
	}

	/**
	 * Get the formatted date for this article if available.
	 *
	 * @access	public
	 * @return	mixed	Formatted string or null for none set.
	 */
	public function getDate() {
		global $wgLang;
		if ( $this->myDate !== null ) {
			return $this->myDate;
		} elseif ( $this->mDate !== null ) {
			return $wgLang->timeanddate( $article->mDate, true );
		}
		return null;
	}
}