<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2012 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 *
 * @package     Feeds
 * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
 * @link        www.phraseanet.com
 */
abstract class Feed_XML_Abstract
{
    /**
     *
     * @var DateTime
     */
    protected $updated_on;

    /**
     *
     * @var string
     */
    protected $title;

    /**
     *
     * @var string
     */
    protected $subtitle;

    /**
     *
     * @var Array
     */
    protected $items = array();

    /**
     *
     * @var Feed_Link
     */
    protected $next_page;

    /**
     *
     * @var Feed_Link
     */
    protected $previous_page;

    /**
     *
     * @var Feed_Link
     */
    protected $link;

    /**
     *
     * @var string
     */
    protected $generator;

    /**
     *
     * @var string
     */
    protected $mimetype;

    /**
     *
     * @param string $title
     */
    public function set_title($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     *
     * @param DateTime $datetime
     * @return Feed_XML_Interface
     */
    public function set_updated_on(DateTime $datetime)
    {
        $this->updated_on = $datetime;

        return $this;
    }

    /**
     *
     * @param string $subtitle
     * @return Feed_XML_Interface
     */
    public function set_subtitle($subtitle)
    {
        $this->subtitle = $subtitle;

        return $this;
    }

    /**
     *
     * @param Feed_Link $link
     * @return Feed_XML_Interface
     */
    public function set_link(Feed_Link $link)
    {
        $this->link = $link;

        return $this;
    }

    /**
     *
     * @param Feed_Link $next_page
     * @return Feed_XML_Interface
     */
    public function set_next_page(Feed_Link $next_page)
    {
        $this->next_page = $next_page;

        return $this;
    }

    /**
     *
     * @param Feed_Link $previous_page
     * @return Feed_XML_Interface
     */
    public function set_previous_page(Feed_Link $previous_page)
    {
        $this->previous_page = $previous_page;

        return $this;
    }

    /**
     *
     * @param Feed_Entry_Adapter $entry
     * @return Feed_XML_Interface
     */
    public function set_item(Feed_Entry_Adapter $entry)
    {
        $this->items[] = $entry;

        return $this;
    }

    /**
     *
     * @param string $generator
     * @return Feed_XML_Interface
     */
    public function set_generator($generator)
    {
        $this->generator = $generator;

        return $this;
    }

    /**
     *
     * @param DOMDocument $document
     * @param DOMNode $node
     * @param boolean $namespaced
     * @return Feed_XML_Interface
     */
    public function add_navigation(DOMDocument $document, DOMNode $node, $namespaced)
    {
        $prefix = $namespaced ? 'atom:' : '';

        if ($this->previous_page instanceof Feed_Link) {
            $prev_link = $this->addTag($document, $node, $prefix . 'link');
            $prev_link->setAttribute('rel', 'previous');
            $prev_link->setAttribute('href', $this->previous_page->get_href());
        }

        if ($this->next_page instanceof Feed_Link) {
            $next_link = $this->addTag($document, $node, $prefix . 'link');
            $next_link->setAttribute('rel', 'next');
            $next_link->setAttribute('href', $this->next_page->get_href());
        }

        return $this;
    }

    /**
     *
     * @param DOMDocument $document
     * @param DOMNode $node
     * @param string $tagname
     * @param string $tagcontent
     * @return DOMElement
     */
    protected function addTag(DOMDocument &$document, DOMNode &$node, $tagname, $tagcontent = null)
    {
        $tag = $document->createElement($tagname);

        if (trim($tagcontent) !== '')
            $tag->appendChild($document->createTextNode($tagcontent));
        $node->appendChild($tag);

        return $tag;
    }

    /**
     *
     * @param DOMDocument $document
     * @param DOMNode $item
     * @param Feed_Entry_Item $content
     * @return Feed_XML_Interface
     */
    protected function addContent(DOMDocument $document, DOMNode $item, Feed_Entry_Item $content)
    {
        $preview_sd = $content->get_record()->get_subdef('preview');
        $preview_permalink = $preview_sd->get_permalink();
        $thumbnail_sd = $content->get_record()->get_thumbnail();
        $thumbnail_permalink = $thumbnail_sd->get_permalink();

        $medium = strtolower($content->get_record()->get_type());

        if ( ! in_array($medium, array('image', 'audio', 'video'))) {
            return $this;
        }

        if ( ! $preview_permalink || ! $thumbnail_permalink) {
            return $this;
        }

        $group = $this->addTag($document, $item, 'media:group');

        $title_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Title);
        if ($title_field) {
            $str_title = $title_field->get_serialized_values(' ');
            $title = $this->addTag($document, $group, 'media:title', $str_title);
            $title->setAttribute('type', 'plain');
        }

        $desc_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Description);
        if ($desc_field) {
            $str_desc = $desc_field->get_serialized_values(' ');
            $desc = $this->addTag($document, $group, 'media:description', $str_desc);
            $desc->setAttribute('type', 'plain');
        }

        $contrib_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Contributor);
        if ($contrib_field) {
            $str_contrib = $contrib_field->get_serialized_values(' ');
            $contrib = $this->addTag($document, $group, 'media:credit', $str_contrib);
            $contrib->setAttribute('role', 'contributor');
            $contrib->setAttribute('scheme', 'urn:ebu');
        }

        $director_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Creator);
        if ($director_field) {
            $str_director = $director_field->get_serialized_values(' ');
            $director = $this->addTag($document, $group, 'media:credit', $str_director);
            $director->setAttribute('role', 'director');
            $director->setAttribute('scheme', 'urn:ebu');
        }

        $publisher_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Publisher);
        if ($publisher_field) {
            $str_publisher = $publisher_field->get_serialized_values(' ');
            $publisher = $this->addTag($document, $group, 'media:credit', $str_publisher);
            $publisher->setAttribute('role', 'publisher');
            $publisher->setAttribute('scheme', 'urn:ebu');
        }

        $rights_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Rights);
        if ($rights_field) {
            $str_rights = $rights_field->get_serialized_values(' ');
            $rights = $this->addTag($document, $group, 'media:copyright', $str_rights);
        }

        $keyword_field = $content->get_record()->get_caption()->get_dc_field(databox_Field_DCESAbstract::Subject);
        if ($keyword_field) {
            $str_keywords = $keyword_field->get_serialized_values(', ');
            $keywords = $this->addTag($document, $group, 'media:keywords', $str_keywords);
        }

        $duration = $content->get_record()->get_duration();

        if ($preview_permalink) {
            $preview = $this->addTag($document, $group, 'media:content');

            $preview->setAttribute('url', $preview_permalink->get_url());
            $preview->setAttribute('fileSize', $preview_sd->get_size());
            $preview->setAttribute('type', $preview_sd->get_mime());
            $preview->setAttribute('medium', $medium);
            $preview->setAttribute('expression', 'full');
            $preview->setAttribute('isDefault', 'true');

            if ($preview_sd->get_width())
                $preview->setAttribute('width', $preview_sd->get_width());
            if ($preview_sd->get_height())
                $preview->setAttribute('height', $preview_sd->get_height());
            if ($duration)
                $preview->setAttribute('duration', $duration);
        }

        if ($thumbnail_permalink) {
            $thumbnail = $this->addTag($document, $group, 'media:thumbnail');

            $thumbnail->setAttribute('url', $thumbnail_permalink->get_url());

            if ($thumbnail_sd->get_width())
                $thumbnail->setAttribute('width', $thumbnail_sd->get_width());
            if ($thumbnail_sd->get_height())
                $thumbnail->setAttribute('height', $thumbnail_sd->get_height());


            $thumbnail = $this->addTag($document, $group, 'media:content');

            $thumbnail->setAttribute('url', $thumbnail_permalink->get_url());
            $thumbnail->setAttribute('fileSize', $thumbnail_sd->get_size());
            $thumbnail->setAttribute('type', $thumbnail_sd->get_mime());
            $thumbnail->setAttribute('medium', $medium);
            $thumbnail->setAttribute('isDefault', 'false');

            if ($thumbnail_sd->get_width())
                $thumbnail->setAttribute('width', $thumbnail_sd->get_width());
            if ($thumbnail_sd->get_height())
                $thumbnail->setAttribute('height', $thumbnail_sd->get_height());
            if ($duration)
                $thumbnail->setAttribute('duration', $duration);
        }

        return $this;
    }

    /**
     *
     * @return string
     */
    public function get_mimetype()
    {
        return $this->mimetype;
    }

    abstract public function render();
}