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<?php
/**
* Extends YamlFFS with Ruby (on Rails) style plural support. Supports subkeys
* zero, one, many, few, other and two for each message using plural with
* {{count}} variable.
* @ingroup FFS
*/
class RubyYamlFFS extends YamlFFS {
protected static $pluralWords = array(
'zero' => 1,
'one' => 1,
'many' => 1,
'few' => 1,
'other' => 1,
'two' => 1
);
public function getFileExtensions() {
return array( '.yml', '.yaml' );
}
/**
* Flattens ruby plural arrays into special plural syntax.
*
* @param array $messages Array of keys and values
*
* @throws MWException
* @return bool|string
*/
public function flattenPlural( $messages ) {
$pluralKeys = false;
$nonPluralKeys = false;
foreach ( $messages as $key => $value ) {
if ( is_array( $value ) ) {
# Plurals can only happen in the lowest level of the structure
return false;
}
# Check if we find any reserved plural keyword
if ( isset( self::$pluralWords[$key] ) ) {
$pluralKeys = true;
} else {
$nonPluralKeys = true;
}
}
# No plural keys at all, we can skip
if ( !$pluralKeys ) {
return false;
}
# Mixed plural keys with other keys, should not happen
if ( $nonPluralKeys ) {
$keys = implode( ', ', array_keys( $messages ) );
throw new MWException( "Reserved plural keywords mixed with other keys: $keys." );
}
$pls = '{{PLURAL';
foreach ( $messages as $key => $value ) {
if ( $key === 'other' ) {
continue;
}
$pls .= "|$key=$value";
}
// Put the "other" alternative last, without other= prefix.
$other = isset( $messages['other'] ) ? '|' . $messages['other'] : '';
$pls .= "$other}}";
return $pls;
}
/**
* Converts the special plural syntax to array or ruby style plurals
*
* @param string $key Message key prefix
* @param string $message The plural string
*
* @return bool|array
*/
public function unflattenPlural( $key, $message ) {
// Quick escape.
if ( strpos( $message, '{{PLURAL' ) === false ) {
return array( $key => $message );
}
/*
* Replace all variables with placeholders. Possible source of bugs
* if other characters that given below are used.
*/
$regex = '~\{[a-zA-Z_-]+}~';
$placeholders = array();
$match = array();
while ( preg_match( $regex, $message, $match ) ) {
$uniqkey = TranslateUtils::getPlaceholder();
$placeholders[$uniqkey] = $match[0];
$search = preg_quote( $match[0], '~' );
$message = preg_replace( "~$search~", $uniqkey, $message );
}
// Then replace (possible multiple) plural instances into placeholders.
$regex = '~\{\{PLURAL\|(.*?)}}~s';
$matches = array();
$match = array();
while ( preg_match( $regex, $message, $match ) ) {
$uniqkey = TranslateUtils::getPlaceholder();
$matches[$uniqkey] = $match;
$message = preg_replace( $regex, $uniqkey, $message, 1 );
}
// No plurals, should not happen.
if ( !count( $matches ) ) {
return false;
}
// The final array of alternative plurals forms.
$alts = array();
/*
* Then loop trough each plural block and replacing the placeholders
* to construct the alternatives. Produces invalid output if there is
* multiple plural bocks which don't have the same set of keys.
*/
$pluralChoice = implode( '|', array_keys( self::$pluralWords ) );
$regex = "~($pluralChoice)\s*=\s*(.+)~s";
foreach ( $matches as $ph => $plu ) {
$forms = explode( '|', $plu[1] );
foreach ( $forms as $form ) {
if ( $form === '' ) {
continue;
}
$match = array();
if ( preg_match( $regex, $form, $match ) ) {
$formWord = "$key.{$match[1]}";
$value = $match[2];
} else {
$formWord = "$key.other";
$value = $form;
}
if ( !isset( $alts[$formWord] ) ) {
$alts[$formWord] = $message;
}
$string = $alts[$formWord];
$alts[$formWord] = str_replace( $ph, $value, $string );
}
}
// Replace other variables.
foreach ( $alts as &$value ) {
$value = str_replace( array_keys( $placeholders ), array_values( $placeholders ), $value );
}
if ( !isset( $alts["$key.other"] ) ) {
wfWarn( "Other not set for key $key" );
return false;
}
return $alts;
}
}
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