<?php
/**
 * Smarty Internal Plugin Resource Registered
 *
 * @package    Brainy
 * @subpackage TemplateResources
 * @author     Uwe Tews
 * @author     Rodney Rehm
 */

namespace Box\Brainy\Resources;

use Box\Brainy\Exceptions\SmartyException;
use Box\Brainy\Templates\TemplateSource;
use Box\Brainy\Templates\Template;

class ResourceRegistered extends Resource
{
    /**
     * populate Source Object with meta data from Resource
     *
     * @param  TemplateSource $source    source object
     * @param  Template       $_template template object
     * @return void
     */
    public function populate(TemplateSource $source, Template $_template = null)
    {
        $source->filepath = $source->type . ':' . $source->name;
        $source->uid = sha1($source->filepath);
        if ($source->smarty->compile_check) {
            $source->timestamp = $this->getTemplateTimestamp($source);
            $source->exists = !!$source->timestamp;
        }
    }

    /**
     * populate Source Object with timestamp and exists from Resource
     *
     * @param  TemplateSource $source source object
     * @return void
     */
    public function populateTimestamp(TemplateSource $source)
    {
        $source->timestamp = $this->getTemplateTimestamp($source);
        $source->exists = !!$source->timestamp;
    }

    /**
     * Get timestamp (epoch) the template source was modified
     *
     * @param  TemplateSource $source source object
     * @return integer|boolean        timestamp (epoch) the template was modified, false if resources has no timestamp
     */
    public function getTemplateTimestamp(TemplateSource $source)
    {
        // return timestamp
        $time_stamp = false;
        call_user_func_array(
            $source->smarty->registered_resources[$source->type][0][1],
            array($source->name, &$time_stamp, $source->smarty)
        );

        return is_numeric($time_stamp) ? (int) $time_stamp : $time_stamp;
    }

    /**
     * Load template's source by invoking the registered callback into current template object
     *
     * @param  TemplateSource $source source object
     * @return string                 template source
     * @throws SmartyException        if source cannot be loaded
     */
    public function getContent(TemplateSource $source)
    {
        // return template string
        $content;
        $t = call_user_func_array(
            $source->smarty->registered_resources[$source->type][0][0],
            array($source->name, &$content, $source->smarty)
        );
        if (is_bool($t) && !$t) {
            throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
        }

        return $content;
    }

    /**
     * Determine basename for compiled filename
     *
     * @param  TemplateSource $source source object
     * @return string                 resource's basename
     */
    protected function getBasename(TemplateSource $source)
    {
        return basename($source->name);
    }
}
