StatsBar.php

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<?php
class StatsBar {
    protected $stats;

    protected $group;

    protected $language;

    public static function getNew( $group, $language, array $stats = null ) {
        $self = new self();
        $self->group = $group;
        $self->language = $language;

        if ( is_array( $stats ) ) {
            $self->stats = $stats;
        } else {
            $self->stats = MessageGroupStats::forItem( $group, $language );
        }

        return $self;
    }

    public function getHtml( IContextSource $context ) {
        $context->getOutput()->addModules( 'ext.translate.statsbar' );

        $total = $this->stats[MessageGroupStats::TOTAL];
        $proofread = $this->stats[MessageGroupStats::PROOFREAD];
        $translated = $this->stats[MessageGroupStats::TRANSLATED];
        $fuzzy = $this->stats[MessageGroupStats::FUZZY];

        if ( !$total ) {
            $untranslated = null;
            $wproofread = $wtranslated = $wfuzzy = $wuntranslated = 0;
        } else {
            // Proofread is subset of translated
            $untranslated = $total - $translated - $fuzzy;

            $wproofread = round( 100 * $proofread / $total, 2 );
            $wtranslated = round( 100 * ( $translated - $proofread ) / $total, 2 );
            $wfuzzy = round( 100 * $fuzzy / $total, 2 );
            $wuntranslated = round( 100 - $wproofread - $wtranslated - $wfuzzy, 2 );
        }

        return Html::rawElement( 'div', array(
                'class' => 'tux-statsbar',
                'data-total' => $total,
                'data-group' => $this->group,
                'data-language' => $this->language,
            ),
            Html::element( 'span', array(
                'class' => 'tux-proofread',
                'style' => "width: $wproofread%",
                'data-proofread' => $proofread,
            ) ) . Html::element( 'span', array(
                'class' => 'tux-translated',
                'style' => "width: $wtranslated%",
                'data-translated' => $translated,
            ) ) . Html::element( 'span', array(
                'class' => 'tux-fuzzy',
                'style' => "width: $wfuzzy%",
                'data-fuzzy' => $fuzzy,
            ) ) . Html::element( 'span', array(
                'class' => 'tux-untranslated',
                'style' => "width: $wuntranslated%",
                'data-untranslated' => $untranslated,
            ) )
        );
    }
}