<?php
/**
 * Check a language file.
 *
 * @package MediaWiki
 * @subpackage Maintenance
 */

require_once( dirname(__FILE__).'/../commandLine.inc' );
require_once( 'languages.inc' );

/**
 * Check a language.
 *
 * @param $code The language code.
 */
function checkLanguage( $code ) {
	global $wgLanguages, $wgGeneralMessages, $wgRequiredMessagesNumber, $wgDisplayLevel, $wgLinks, $wgWikiLanguage, $wgChecks;

	# Get messages
	$messages = $wgLanguages->getMessages( $code );
	$messagesNumber = count( $messages['translated'] );

	# Skip the checks if specified
	if ( $wgDisplayLevel == 0 ) {
		return;
	}

	# Untranslated messages
	if ( in_array( 'untranslated', $wgChecks ) ) {
		$untranslatedMessages = $wgLanguages->getUntranslatedMessages( $code );
		$untranslatedMessagesNumber = count( $untranslatedMessages );
		$wgLanguages->outputMessagesList( $untranslatedMessages, $code, "\n$untranslatedMessagesNumber messages of $wgRequiredMessagesNumber are not translated to $code, but exist in en:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Duplicate messages
	if ( in_array( 'duplicate', $wgChecks ) ) {
		$duplicateMessages = $wgLanguages->getDuplicateMessages( $code );
		$duplicateMessagesNumber = count( $duplicateMessages );
		$wgLanguages->outputMessagesList( $duplicateMessages, $code, "\n$duplicateMessagesNumber messages of $messagesNumber are translated the same in en and $code:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Obsolete messages
	if ( in_array( 'obsolete', $wgChecks ) ) {
		$obsoleteMessages = $messages['obsolete'];
		$obsoleteMessagesNumber = count( $obsoleteMessages );
		$wgLanguages->outputMessagesList( $obsoleteMessages, $code, "\n$obsoleteMessagesNumber messages of $messagesNumber are not exist in en (or are in the ignored list), but still exist in $code:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Messages without variables
	if ( in_array( 'variables', $wgChecks ) ) {
		$messagesWithoutVariables = $wgLanguages->getMessagesWithoutVariables( $code );
		$messagesWithoutVariablesNumber = count( $messagesWithoutVariables );
		$wgLanguages->outputMessagesList( $messagesWithoutVariables, $code, "\n$messagesWithoutVariablesNumber messages of $messagesNumber in $code don't use some variables while en uses them:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Empty messages
	if ( in_array( 'empty', $wgChecks ) ) {
		$emptyMessages = $wgLanguages->getEmptyMessages( $code );
		$emptyMessagesNumber = count( $emptyMessages );
		$wgLanguages->outputMessagesList( $emptyMessages, $code, "\n$emptyMessagesNumber messages of $messagesNumber in $code are empty or -:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Messages with whitespace
	if ( in_array( 'whitespace', $wgChecks ) ) {
		$messagesWithWhitespace = $wgLanguages->getMessagesWithWhitespace( $code );
		$messagesWithWhitespaceNumber = count( $messagesWithWhitespace );
		$wgLanguages->outputMessagesList( $messagesWithWhitespace, $code, "\n$messagesWithWhitespaceNumber messages of $messagesNumber in $code have a trailing whitespace:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Non-XHTML messages
	if ( in_array( 'xhtml', $wgChecks ) ) {
		$nonXHTMLMessages = $wgLanguages->getNonXHTMLMessages( $code );
		$nonXHTMLMessagesNumber = count( $nonXHTMLMessages );
		$wgLanguages->outputMessagesList( $nonXHTMLMessages, $code, "\n$nonXHTMLMessagesNumber messages of $messagesNumber in $code are not well-formed XHTML:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}

	# Messages with wrong characters
	if ( in_array( 'chars', $wgChecks ) ) {
		$messagesWithWrongChars = $wgLanguages->getMessagesWithWrongChars( $code );
		$messagesWithWrongCharsNumber = count( $messagesWithWrongChars );
		$wgLanguages->outputMessagesList( $messagesWithWrongChars, $code, "\n$messagesWithWrongCharsNumber messages of $messagesNumber in $code include hidden chars which should not be used in the messages:", $wgDisplayLevel, $wgLinks, $wgWikiLanguage );
	}
}

# Show help
if ( isset( $options['help'] ) ) {
	echo <<<END
Run this script to check a specific language file, or all of them.
Parameters:
	* lang: Language code (default: the installation default language). You can also specify "all" to check all the languages.
	* help: Show this help.
	* level: Show the following level (default: 2).
	* links: Link the message values (default off).
	* wikilang: For the links, what is the content language of the wiki to display the output in (default en).
	* whitelist: Make only the following checks (form: code,code).
	* blacklist: Don't make the following checks (form: code,code).
	* duplicate: Additionally check for messages which are translated the same to English (default off).
	* noexif: Don't check for EXIF messages (a bit hard and boring to translate), if you know that they are currently not translated and want to focus on other problems (default off).
Check codes (ideally, all of them should result 0; all the checks are executed by default):
	* untranslated: Messages which are required to translate, but are not translated.
	* obsolete: Messages which are untranslatable, but translated.
	* variables: Messages without variables which should be used.
	* empty: Empty messages.
	* whitespace: Messages which have trailing whitespace.
	* xhtml: Messages which are not well-formed XHTML.
	* chars: Messages with hidden characters.
Display levels (default: 2):
	* 0: Skip the checks (useful for checking syntax).
	* 1: Show only the stub headers and number of wrong messages, without list of messages.
	* 2: Show only the headers and the message keys, without the message values.
	* 3: Show both the headers and the complete messages, with both keys and values.

END;
	exit();
}

# Get the language code
if ( isset( $options['lang'] ) ) {
	$wgCode = $options['lang'];
} else {
	$wgCode = $wgContLang->getCode();
}

# Get the display level
if ( isset( $options['level'] ) ) {
	$wgDisplayLevel = $options['level'];
} else {
	$wgDisplayLevel = 2;
}

# Get the links options
$wgLinks = isset( $options['links'] );
$wgWikiLanguage = isset( $options['wikilang'] ) ? $options['wikilang'] : 'en';

# Get the checks to do
$wgChecks = array( 'untranslated', 'obsolete', 'variables', 'empty', 'whitespace', 'xhtml', 'chars' );
if ( isset( $options['whitelist'] ) ) {
	$wgChecks = explode( ',', $options['whitelist'] );
} elseif ( isset( $options['blacklist'] ) ) {
	$wgChecks = array_diff( $wgChecks, explode( ',', $options['blacklist'] ) );
}

# Add duplicate option if specified
if ( isset( $options['duplicate'] ) ) {
	$wgChecks[] = 'duplicate';
}

# Should check for EXIF?
$wgCheckEXIF = !isset( $options['noexif'] );

# Get language objects
$wgLanguages = new languages( $wgCheckEXIF );

# Get the general messages
$wgGeneralMessages = $wgLanguages->getGeneralMessages();
$wgRequiredMessagesNumber = count( $wgGeneralMessages['required'] );

# Check the language
if ( $wgCode == 'all' ) {
	foreach ( $wgLanguages->getLanguages() as $language ) {
		if ( $language != 'en' && $language != 'enRTL' ) {
			checkLanguage( $language );
		}
	}
} else {
	# Can't check English
	if ( $wgCode == 'en' ) {
		echo "Current selected language is English, which cannot be checked.\n";
	} else if ( $wgCode == 'enRTL' ) {
		echo "Current selected language is RTL English, which cannot be checked.\n";
	} else {
		checkLanguage( $wgCode );
	}
}

?>