Message.php

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<?php
abstract class TMessage {
    protected $key;
    protected $definition;
    protected $infile;
    protected $tags = array();
    protected $props = array();
    protected $reviewers = array();

    public function __construct( $key, $definition ) {
        $this->key = $key;
        $this->definition = $definition;
    }

    public function key() {
        return $this->key;
    }

    public function definition() {
        return $this->definition;
    }

    abstract public function translation();

    public function setInfile( $text ) {
        $this->infile = $text;
    }

    public function infile() {
        return $this->infile;
    }

    public function addTag( $tag ) {
        $this->tags[] = $tag;
    }

    public function hasTag( $tag ) {
        return in_array( $tag, $this->tags, true );
    }

    public function getTags() {
        return $this->tags;
    }

    public function setProperty( $key, $value ) {
        $this->props[$key] = $value;
    }

    public function appendProperty( $key, $value ) {
        if ( !isset( $this->props[$key] ) ) {
            $this->props[$key] = array();
        }
        $this->props[$key][] = $value;
    }

    public function getProperty( $key ) {
        return isset( $this->props[$key] ) ? $this->props[$key] : null;
    }

    public function getPropertyNames() {
        return array_keys( $this->props );
    }
}

class ThinMessage extends TMessage {
    // This maps properties to fields in the database result row
    protected static $propertyMap = array(
        'last-translator-text' => 'rev_user_text',
        'last-translator-id' => 'rev_user',
    );

    protected $row;

    public function setRow( $row ) {
        $this->row = $row;
    }

    public function translation() {
        if ( !isset( $this->row ) ) {
            return $this->infile();
        }

        return Revision::getRevisionText( $this->row );
    }

    // Re-implemented
    public function getProperty( $key ) {
        if ( !isset( self::$propertyMap[$key] ) ) {
            return parent::getProperty( $key );
        }

        $field = self::$propertyMap[$key];
        if ( !isset( $this->row->$field ) ) {
            return null;
        }

        return $this->row->$field;
    }

    // Re-implemented
    public function getPropertyNames() {
        return array_merge( parent::getPropertyNames(), array_keys( self::$propertyMap ) );
    }
}

class FatMessage extends TMessage {
    protected $translation;

    public function setTranslation( $text ) {
        $this->translation = $text;
    }

    public function translation() {
        if ( $this->translation === null ) {
            return $this->infile;
        }

        return $this->translation;
    }
}