TTMServer.php

Go to the documentation of this file.

<?php
class TTMServer {
    protected $config;

    protected function __construct( $config ) {
        $this->config = $config;
    }

    public static function factory( $config ) {
        if ( isset( $config['class'] ) ) {
            $class = $config['class'];

            return new $class( $config );
        } elseif ( isset( $config['type'] ) ) {
            $type = $config['type'];
            switch ( $type ) {
                case 'ttmserver':
                    return new DatabaseTTMServer( $config );
                case 'remote-ttmserver':
                    return new RemoteTTMServer( $config );
                default:
                    return null;
            }
        }

        throw new MWEXception( "TTMServer with no type" );
    }

    public static function primary() {
        global $wgTranslateTranslationServices;
        if ( isset( $wgTranslateTranslationServices['TTMServer'] ) ) {
            $obj = self::factory( $wgTranslateTranslationServices['TTMServer'] );
            if ( $obj instanceof WritableTTMServer ) {
                return $obj;
            }
        }

        return new FakeTTMServer();
    }

    public static function sortSuggestions( array $suggestions ) {
        usort( $suggestions, array( __CLASS__, 'qualitySort' ) );

        return $suggestions;
    }

    protected static function qualitySort( $a, $b ) {
        list( $c, $d ) = array( $a['quality'], $b['quality'] );
        if ( $c === $d ) {
            return 0;
        }

        // Descending sort
        return ( $c > $d ) ? -1 : 1;
    }

    public static function levenshtein( $str1, $str2, $length1, $length2 ) {
        if ( $length1 == 0 ) {
            return $length2;
        }
        if ( $length2 == 0 ) {
            return $length1;
        }
        if ( $str1 === $str2 ) {
            return 0;
        }

        $bytelength1 = strlen( $str1 );
        $bytelength2 = strlen( $str2 );
        if ( $bytelength1 === $length1 && $bytelength1 <= 255
            && $bytelength2 === $length2 && $bytelength2 <= 255
        ) {
            return levenshtein( $str1, $str2 );
        }

        $prevRow = range( 0, $length2 );
        for ( $i = 0; $i < $length1; $i++ ) {
            $currentRow = array();
            $currentRow[0] = $i + 1;
            $c1 = mb_substr( $str1, $i, 1 );
            for ( $j = 0; $j < $length2; $j++ ) {
                $c2 = mb_substr( $str2, $j, 1 );
                $insertions = $prevRow[$j + 1] + 1;
                $deletions = $currentRow[$j] + 1;
                $substitutions = $prevRow[$j] + ( ( $c1 != $c2 ) ? 1 : 0 );
                $currentRow[] = min( $insertions, $deletions, $substitutions );
            }
            $prevRow = $currentRow;
        }

        return $prevRow[$length2];
    }

    public static function onDelete( $wikipage ) {
        $handle = new MessageHandle( $wikipage->getTitle() );
        TTMServer::primary()->update( $handle, null );

        return true;
    }

    public static function onChange( MessageHandle $handle, $text, $fuzzy ) {
        if ( $fuzzy ) {
            $text = null;
        }
        TTMServer::primary()->update( $handle, $text );
    }

    public static function onGroupChange( MessageHandle $handle, $old, $new ) {
        if ( $old === array() ) {
            // Don't bother for newly added messages
            return true;
        }

        $job = TTMServerMessageUpdateJob::newJob( $handle );
        $job->insert();

        return true;
    }
}