<?php

namespace WP_CLI\Doctor\Check;

use WP_CLI;
use WP_CLI\Doctor\Check;

/**
 * Warns when there are theme updates available.
 */
class Theme_Update extends Check {

    public function run() {
        ob_start();
        WP_CLI::run_command( array( 'theme', 'list' ), array( 'format' => 'json' ) );
        $ret          = ob_get_clean();
        $themes       = ! empty( $ret ) ? json_decode( $ret, true ) : array();
        $update_count = 0;
        foreach ( $themes as $theme ) {
            if ( 'available' === $theme['update'] ) {
                ++$update_count;
            }
        }

        if ( 1 === $update_count ) {
            $this->set_status( 'warning' );
            $this->set_message( '1 theme has an update available.' );
        } elseif ( $update_count ) {
            $this->set_status( 'warning' );
            $this->set_message( "{$update_count} themes have updates available." );
        } else {
            $this->set_status( 'success' );
            $this->set_message( 'Themes are up to date.' );
        }
    }
}