<?php
/**
 * Credits.php -- formats credits for articles
 * Copyright 2004, Evan Prodromou <evan@wikitravel.org>.
 *
 *  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
 *
 * @author <evan@wikitravel.org>
 */

/**
 * This is largely cadged from PageHistory::history
 */
function showCreditsPage($article) {
	global $wgOut;

	$fname = 'showCreditsPage';

	wfProfileIn( $fname );
	
	$wgOut->setPageTitle( $article->mTitle->getPrefixedText() );
	$wgOut->setSubtitle( wfMsg( 'creditspage' ) );
	$wgOut->setArticleFlag( false );
	$wgOut->setArticleRelated( true );
	$wgOut->setRobotpolicy( 'noindex,nofollow' );

	if( $article->mTitle->getArticleID() == 0 ) {
		$s = wfMsg( 'nocredits' );
	} else {
		$s = getCredits($article, -1);
	}

	$wgOut->addHTML( $s );

	wfProfileOut( $fname );
}

function getCredits($article, $cnt, $showIfMax=true) {
	$fname = 'getCredits';
	wfProfileIn( $fname );
	$s = '';

	if (isset($cnt) && $cnt != 0) {
		$s = getAuthorCredits($article);
		if ($cnt > 1 || $cnt < 0) {
			$s .= ' ' . getContributorCredits($article, $cnt - 1, $showIfMax);
		}
	}

	wfProfileOut( $fname );
	return $s;
}

/**
 *
 */
function getAuthorCredits($article) {
	global $wgLang, $wgAllowRealName;

	$last_author = $article->getUser();

	if ($last_author == 0) {
		$author_credit = wfMsg('anonymous');
	} else {
		if($wgAllowRealName) { $real_name = User::whoIsReal($last_author); }
		$user_name = User::whoIs($last_author);

		if (!empty($real_name)) {
			$author_credit = creditLink($user_name, $real_name);
		} else {
			$author_credit = wfMsg('siteuser', creditLink($user_name));
		}
	}

	$timestamp = $article->getTimestamp();
	if ($timestamp) {
		$d = $wgLang->date($article->getTimestamp(), true);
		$t = $wgLang->time($article->getTimestamp(), true);
	} else {
		$d = '';
		$t = '';
	}
	return wfMsg('lastmodifiedatby', $d, $t, $author_credit);
}

/**
 *
 */
function getContributorCredits($article, $cnt, $showIfMax) {

	global $wgLang, $wgAllowRealName;

	$contributors = $article->getContributors();

	$others_link = '';

	# Hmm... too many to fit!

	if ($cnt > 0 && count($contributors) > $cnt) {
		$others_link = creditOthersLink($article);
		if (!$showIfMax) {
			return wfMsg('othercontribs', $others_link);
		} else {
			$contributors = array_slice($contributors, 0, $cnt);
		}
	}

	$real_names = array();
	$user_names = array();

	$anon = '';

	# Sift for real versus user names

	foreach ($contributors as $user_parts) {
		if ($user_parts[0] != 0) {
			if ($wgAllowRealName && !empty($user_parts[2])) {
				$real_names[] = creditLink($user_parts[1], $user_parts[2]);
			} else {
				$user_names[] = creditLink($user_parts[1]);
			}
		} else {
			$anon = wfMsg('anonymous');
		}
	}

	# Two strings: real names, and user names

	$real = $wgLang->listToText($real_names);
	$user = $wgLang->listToText($user_names);

	# "ThisSite user(s) A, B and C"

	if (!empty($user)) {
		$user = wfMsg('siteusers', $user);
	}

	# This is the big list, all mooshed together. We sift for blank strings

	$fulllist = array();

	foreach (array($real, $user, $anon, $others_link) as $s) {
		if (!empty($s)) {
			array_push($fulllist, $s);
		}
	}

	# Make the list into text...

	$creds = $wgLang->listToText($fulllist);

	# "Based on work by ..."

	return (empty($creds)) ? '' : wfMsg('othercontribs', $creds);
}

/**
 *
 */
function creditLink($user_name, $link_text = '') {
	global $wgUser, $wgContLang;
	$skin = $wgUser->getSkin();
	return $skin->makeLink($wgContLang->getNsText(NS_USER) . ':' . $user_name,
			       htmlspecialchars( (empty($link_text)) ? $user_name : $link_text ));
}

/**
 *
 */
function creditOthersLink($article) {
	global $wgUser;
	$skin = $wgUser->getSkin();
	return $skin->makeKnownLink($article->mTitle->getPrefixedText(), wfMsg('others'), 'action=credits');
}