<?php
/** \file
* \brief Contains setup code for the Contribution Scores Extension. 
*/

# Not a valid entry point, skip unless MEDIAWIKI is defined
if (!defined('MEDIAWIKI')) {
	echo "Contribution Scores extension";
	exit(1);
}

$wgExtensionCredits['specialpage'][] = array(
	'name'=>'Contribution Scores',
	'url'=>'http://www.mediawiki.org/wiki/Extension:Contribution_Scores',
	'author'=>'Tim Laqua',
	'description'=>'Polls wiki database for highest user contribution volume',
	'descriptionmsg' => 'contributionscores-desc',
	'version'=>'1.10'
);

define( 'CONTRIBUTIONSCORES_PATH', dirname( __FILE__ ) );
define( 'CONTRIBUTIONSCORES_EXTPATH', str_replace( $_SERVER['DOCUMENT_ROOT'], '/', CONTRIBUTIONSCORES_PATH ) );
define( 'CONTRIBUTIONSCORES_MAXINCLUDELIMIT', 50 );
$wgContribScoreReports = null;
$wgContribScoreIgnoreBlockedUsers = false;
$wgContribScoreIgnoreBots = false;
$wgContribScoreDisableCache = false;

$wgAutoloadClasses['ContributionScores'] = CONTRIBUTIONSCORES_PATH . '/ContributionScores_body.php';
$wgSpecialPages['ContributionScores'] = 'ContributionScores';

if( version_compare( $wgVersion, '1.11', '>=' ) ) {
	$wgExtensionMessagesFiles['ContributionScores'] = CONTRIBUTIONSCORES_PATH . '/ContributionScores.i18n.php';
} else {
	$wgExtensionFunctions[] = 'efContributionScores_AddMessages';
}

$wgHooks['LanguageGetMagic'][] = 'efContributionScores_LanguageGetMagic';

if ( defined( 'MW_SUPPORTS_PARSERFIRSTCALLINIT' ) ) {
	$wgHooks['ParserFirstCallInit'][] = 'efContributionScores_Setup';
} else {
	$wgExtensionFunctions[] = 'efContributionScores_Setup';
}

///Message Cache population for versions that did not support $wgExtensionFunctions
function efContributionScores_AddMessages() {
	global $wgMessageCache;
	
	#Add Messages
	require( CONTRIBUTIONSCORES_PATH . '/ContributionScores.i18n.php' );
	foreach( $messages as $key => $value ) {
		  $wgMessageCache->addMessages( $messages[$key], $key );
	}
	return true;
}

function efContributionScores_Setup() {
	global $wgParser;
	
	$wgParser->setFunctionHook( 'cscore', 'efContributionScores_Render' );
	return true;
}

function efContributionScores_LanguageGetMagic( &$magicWords, $langCode ) {
	$magicWords['cscore'] = array( 0, 'cscore' );
	return true;
}

function efContributionScores_Render(&$parser, $usertext, $metric='score') {
	global $wgContribScoreDisableCache, $wgVersion;

	if( version_compare( $wgVersion, '1.11', '>=' ) )
		wfLoadExtensionMessages( 'ContributionScores' );
		
	$output = "";
	
	if ($wgContribScoreDisableCache) {
		$parser->disableCache();
	}
	
	$user = User::newFromName($usertext);
	$dbr = wfGetDB( DB_SLAVE );
	
	if ($user->getID() != 0) {
		if ($metric=='score') {
			$res = $dbr->select('revision',
									'COUNT(DISTINCT rev_page)+SQRT(COUNT(rev_id)-COUNT(DISTINCT rev_page))*2 AS wiki_rank',
									array('rev_user' => $user->getID()));
			$row = $dbr->fetchObject($res);
			$output = round($row->wiki_rank,0);
		} elseif ($metric=='changes') {
			$res = $dbr->select('revision',
									'COUNT(rev_id) AS rev_count',
									array('rev_user' => $user->getID()));
			$row = $dbr->fetchObject($res);
			$output = $row->rev_count;
			
		} elseif ($metric=='pages') {
			$res = $dbr->select('revision',
									'COUNT(DISTINCT rev_page) AS page_count',
									array('rev_user' => $user->getID()));
			$row = $dbr->fetchObject($res);
			$output = $row->page_count;
		} else {
			$output = wfMsg('contributionscores-invalidmetric');
		}
	} else {
		$output = wfMsg('contributionscores-invalidusername');
	}
	
	return $parser->insertStripItem($output, $parser->mStripState);
}