<?php

/**
 * This file is part of the Kdyby (http://www.kdyby.org)
 *
 * Copyright (c) 2008, 2011 Filip Procházka ([email protected])
 *
 * @license http://www.kdyby.org/license
 */

namespace Kdyby\Components;

use Kdyby;
use Kdyby\Assets\FormulaeManager;
use Nette;
use Nette\Application\Application;
use Nette\Utils\Html;



/**
 * @author Filip Procházka <[email protected]>
 */
class HeaderControl extends Kdyby\Application\UI\Control
{

    /** @var \Nette\Utils\Html */
    private $headEl;

    /** @var \Nette\Utils\Html */
    private $titleEl;

    /** @var \Kdyby\Assets\FormulaeManager */
    private $formulaeManager;

    /** @var array */
    private $meta = array(
        'content-type' => array('http-equiv' => 'Content-Type', 'content' => 'text/html; charset=utf-8'),
        'robots' => array('name' => 'robots', 'content' => 'noindex')
    );



    /**
     * @param \Nette\Application\Application $application
     * @param \Kdyby\Assets\FormulaeManager $formulaeManager
     */
    public function __construct(Application $application, FormulaeManager $formulaeManager)
    {
        parent::__construct();

        $this->formulaeManager = $formulaeManager;
        $application->onShutdown[] = function () use ($formulaeManager) {
            $formulaeManager->publish();
        };

        $this->headEl = Html::el('head');
        $this->titleEl = Html::el('title');
    }



    /**
     * @return \Nette\Utils\Html
     */
    public function getHeadPrototype()
    {
        return $this->headEl;
    }



    /**
     * @param array|string $title
     * @param bool $reverse
     * @param string $separator
     */
    public function setTitle($title, $reverse = FALSE, $separator = '-')
    {
        if (is_array($title)) {
            $title = $reverse ? array_reverse($title) : $title;
            $title = implode(' ' . $separator . ' ', $title);
        }

        $this->titleEl->setText($title);
    }



    /**
     * @param array $meta
     */
    public function addMeta(array $meta)
    {
        if (!isset($meta['name']) && !isset($meta['http-equiv'])) {
            throw new Kdyby\InvalidArgumentException('Meta must contain either "name" or "http-equiv".');
        }

        $key = isset($meta['name']) ? $meta['name'] : $meta['http-equiv'];
        $this->meta[strtolower($key)] = $meta;
    }



    /**
     */
    public function render()
    {
        $head = clone $this->headEl;

        // meta
        foreach ($this->meta as $meta) {
            $head->add(Html::el('meta')->addAttributes($meta));
        }

        // title
        $head->add(clone $this->titleEl);

        // styles
        $fm = $this->formulaeManager;
        foreach ($fm->getAssets(FormulaeManager::TYPE_STYLESHEET) as $style) {
            $el = Html::el('link')->href($style['src'])->type('text/css');
            $el->rel(isset($style['rel']) ? $style['rel'] : 'stylesheet');
            $el->media(isset($style['media']) ? $style['media'] : 'screen,projection,tv');
            $head->add($el);
        }

        // scripts
        foreach ($fm->getAssets(FormulaeManager::TYPE_JAVASCRIPT) as $script) {
            $head->add(Html::el('script')->src($script['src'])->type('text/javascript'));
        }

        echo $head;
    }

}