countMessages.php

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<?php
require_once __DIR__ . '/../Maintenance.php';

class CountMessages extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->mDescription = "Count how many messages we have defined for each language";
    }

    public function execute() {
        global $IP;
        $dir = $this->getArg( 0, "$IP/languages/messages" );
        $total = 0;
        $nonZero = 0;
        foreach ( glob( "$dir/*.php" ) as $file ) {
            $baseName = basename( $file );
            if ( !preg_match( '/Messages([A-Z][a-z_]+)\.php$/', $baseName, $m ) ) {
                continue;
            }

            $numMessages = $this->getNumMessages( $file );
            // print "$code: $numMessages\n";
            $total += $numMessages;
            if ( $numMessages > 0 ) {
                $nonZero ++;
            }
        }
        $this->output( "\nTotal: $total\n" );
        $this->output( "Languages: $nonZero\n" );
    }

    private function getNumMessages( $file ) {
        // Separate function to limit scope
        require $file;
        if ( isset( $messages ) ) {
            return count( $messages );
        } else {
            return 0;
        }
    }
}

$maintClass = "CountMessages";
require_once RUN_MAINTENANCE_IF_MAIN;