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Code Issues Projects Releases Wiki Activity

#4674 Add support for external medias: oembed, ogp, etc

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skala
Laurent Opprecht 13 years ago
parent 0433b28f7f
commit 7b2e9fbbd7
21 changed files with 2266 additions and 1 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 20
      main/inc/lib/autoload.class.php
  2. 1
      main/inc/lib/external_media/renderer/__README.txt
  3. 56
      main/inc/lib/external_media/renderer/asset_aggregated_renderer.class.php
  4. 107
      main/inc/lib/external_media/renderer/asset_renderer.class.php
  5. 662
      main/inc/lib/external_media/renderer/http_resource.class.php
  6. 113
      main/inc/lib/external_media/renderer/lab/asset_google_calendar_renderer.class.php
  7. 57
      main/inc/lib/external_media/renderer/lab/asset_mahara_group_renderer.class.php
  8. 63
      main/inc/lib/external_media/renderer/lab/asset_mahara_person_renderer.class.php
  9. 46
      main/inc/lib/external_media/renderer/lab/asset_wiki_renderer.class.php
  10. 75
      main/inc/lib/external_media/renderer/protocol/asset_google_document_renderer.class.php
  11. 95
      main/inc/lib/external_media/renderer/protocol/asset_google_document_viewer_renderer.class.php
  12. 129
      main/inc/lib/external_media/renderer/protocol/asset_google_map_renderer.class.php
  13. 90
      main/inc/lib/external_media/renderer/protocol/asset_google_widget_renderer.class.php
  14. 44
      main/inc/lib/external_media/renderer/protocol/asset_image_renderer.class.php
  15. 65
      main/inc/lib/external_media/renderer/protocol/asset_media_renderer.class.php
  16. 65
      main/inc/lib/external_media/renderer/protocol/asset_mediaserver_renderer.class.php
  17. 124
      main/inc/lib/external_media/renderer/protocol/asset_oembed_renderer.class.php
  18. 201
      main/inc/lib/external_media/renderer/protocol/asset_og_renderer.class.php
  19. 83
      main/inc/lib/external_media/renderer/protocol/asset_page_renderer.class.php
  20. 95
      main/inc/lib/external_media/renderer/protocol/asset_rss_renderer.class.php
  21. 76
      main/inc/lib/external_media/renderer/protocol/asset_scratch_renderer.class.php

20
main/inc/lib/autoload.class.php
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@ -69,6 +69,24 @@ class Autoload
$result['AnnouncementEmail'] = '/main/announcements/announcement_email.class.php';
$result['Answer'] = '/main/exercice/answer.class.php';
$result['AppPlugin'] = '/main/inc/lib/plugin.lib.php';
$result['AssetAggregatedRenderer'] = '/main/inc/lib/external_media/renderer/asset_aggregated_renderer.class.php';
$result['AssetGoogleCalendarRenderer'] = '/main/inc/lib/external_media/renderer/lab/asset_google_calendar_renderer.class.php';
$result['AssetGoogleDocumentRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_google_document_renderer.class.php';
$result['AssetGoogleDocumentViewerRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_google_document_viewer_renderer.class.php';
$result['AssetGoogleMapRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_google_map_renderer.class.php';
$result['AssetGoogleWidgetRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_google_widget_renderer.class.php';
$result['AssetImageRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_image_renderer.class.php';
$result['AssetMaharaGroupRenderer'] = '/main/inc/lib/external_media/renderer/lab/asset_mahara_group_renderer.class.php';
$result['AssetMaharaPersonRenderer'] = '/main/inc/lib/external_media/renderer/lab/asset_mahara_person_renderer.class.php';
$result['AssetMediaRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_media_renderer.class.php';
$result['AssetMediaserverRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_mediaserver_renderer.class.php';
$result['AssetOembedRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_oembed_renderer.class.php';
$result['AssetOgRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_og_renderer.class.php';
$result['AssetPageRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_page_renderer.class.php';
$result['AssetRenderer'] = '/main/inc/lib/external_media/renderer/asset_renderer.class.php';
$result['AssetRssRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_rss_renderer.class.php';
$result['AssetScratchRenderer'] = '/main/inc/lib/external_media/renderer/protocol/asset_scratch_renderer.class.php';
$result['AssetWikiRenderer'] = '/main/inc/lib/external_media/renderer/lab/asset_wiki_renderer.class.php';
$result['AttendanceLink'] = '/main/gradebook/lib/be/attendancelink.class.php';
$result['Auth'] = '/main/inc/lib/auth.lib.php';
$result['Block'] = '/main/dashboard/block.class.php';
@ -211,6 +229,7 @@ class Autoload
$result['HotSpotDelineation'] = '/main/exercice/hotspot.class.php';
$result['Html'] = '/main/inc/lib/html.class.php';
$result['Html_Quickform_Rule_Date'] = '/main/inc/lib/pear/HTML/QuickForm/Rule/Date.php';
$result['HttpResource'] = '/main/inc/lib/external_media/renderer/http_resource.class.php';
$result['Image'] = '/main/inc/lib/image.lib.php';
$result['ImageWrapper'] = '/main/inc/lib/image.lib.php';
$result['ImagickWrapper'] = '/main/inc/lib/image.lib.php';
@ -430,7 +449,6 @@ class Autoload
$result['xhtdoc'] = '/main/inc/lib/xht.lib.php';
$result['xmddoc'] = '/main/inc/lib/xmd.lib.php';
return $result;
}

1
main/inc/lib/external_media/renderer/__README.txt
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@ -0,0 +1 @@
Used to extract metadata from external resources : youtube, dailymotion, etc

56
main/inc/lib/external_media/renderer/asset_aggregated_renderer.class.php
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@ -0,0 +1,56 @@
<?php
/**
* Process all renderers attached in order.
*
* If a renderer returns an key value that has not already been set add it
* to the result. Otherwise let the previous value unchanged.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetAggregatedRenderer extends AssetRenderer
{
protected $renderers = array();
public function __construct($renderers)
{
$this->renderers = $renderers;
}
/**
*
* @return array
*/
public function renderers()
{
return $this->renderers;
}
/**
*
* @param HttpResource $asset
* @return array
*/
public function render($asset)
{
$result = array();
$plugins = self::plugins();
foreach ($this->renderers as $renderer)
{
$data = $renderer->render($asset);
$data = $data ? $data : array();
foreach ($data as $key => $value)
{
if (!isset($result[$key]) && !empty($value))
{
$result[$key] = $value;
}
}
}
return $result;
}
}

107
main/inc/lib/external_media/renderer/asset_renderer.class.php
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@ -0,0 +1,107 @@
<?php
require_once dirname(__FILE__) . '/http_resource.class.php';
require_once dirname(__FILE__) . '/asset_aggregated_renderer.class.php';
/**
* Renderer for an http resource.
* Extract meta data and snippet html view from an given url/resource.
*
* Base class. Other renderers must inherit from it.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetRenderer
{
const THUMBNAIL = 'thumbnail';
const EMBED_SNIPPET = 'embed_snippet';
const EMBED_TYPE = 'embed_type';
const EMBED_URL = 'embed_url';
const WIDTH = 'width';
const HEIGHT = 'height';
const LANGUAGE = 'language';
const URL = 'url';
const TAGS = 'tags';
const TITLE = 'title';
const CREATED_TIME = 'created_time';
const DURATION = 'duration';
const DESCRIPTION = 'description';
const ICON = 'icon';
static function get($url, $config = array())
{
if (strpos('url', 'javascript:') !== false)
{
return array();
}
$result = array();
$url = trim($url);
if (empty($url))
{
return array();
}
$asset = new HttpResource($url, $config);
$renderer = new AssetAggregatedRenderer(self::plugins());
$result = $renderer->render($asset);
$result['url'] = $url;
return $result;
}
static function plugins()
{
static $result = array();
if (!empty($result))
{
return $result;
}
/*
* We make sure we load them from most specialized to less specialized.
* The first that provides a value for a field wins.
*/
$protocols = array(
'oembed',
'og',
'image',
'media',
'rss',
'google_map',
'google_document',
'google_document_viewer',
'google_widget',
'mediaserver',
'scratch',
'page');
foreach ($protocols as $protocol)
{
$file = "asset_{$protocol}_renderer.class.php";
require_once dirname(__FILE__) . '/protocol/' . $file;
$class = "asset_{$protocol}_renderer";
$class = explode('_', $class);
$class = array_map('ucfirst', $class);
$class = implode($class);
$result[] = new $class();
}
return $result;
}
/**
* Renderer function. Take a http asset as input and return an array containing
* various properties: metadata, html snippet, etc.
*
* @param HttpResource $asset
* @return array
*/
public function render($asset)
{
$result = array();
return $result;
}
}

662
main/inc/lib/external_media/renderer/http_resource.class.php
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@ -0,0 +1,662 @@
<?php
/**
* An HTTP resource. In most cases an HTML document.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class HttpResource
{
/**
* Fetch the content and metadata of an url.
*
* If the content type is not parsable, i.e. it is not made of text,
* only fetch the metadata and not the content. This is mostly done to
* avoid downloading big files - videos, images, etc - which is unnecessary.
*
* @param string $url the url to fetch
* @return array array containing the content and various info
*/
static function fetch($url, $fetch_content = null)
{
static $cache = array();
if (isset($cache[$url]))
{
return $cache;
}
if (is_null($fetch_content) || $fetch_content === false)
{
// create a new cURL resource
$ch = curl_init();
// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_NOBODY, true);
$content = curl_exec($ch);
$error = curl_error($ch);
$info = curl_getinfo($ch);
// close cURL resource, and free up system resources
curl_close($ch);
$info['content'] = $content;
$info['error'] = $error;
if ($fetch_content === false)
{
return $cache[$url] = $info;
}
if (isset($info['content_type']) && strpos($info['content_type'], 'text') === false)
{
return $cache[$url] = $info;
}
}
// create a new cURL resource
$ch = curl_init();
// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//curl_setopt($ch, CURLOPT_VERBOSE, true);
$content = curl_exec($ch);
$error = curl_error($ch);
$info = curl_getinfo($ch);
// close cURL resource, and free up system resources
curl_close($ch);
$info['content'] = $content;
$info['error'] = $error;
return $cache[$url] = $info;
}
static function fetch_json($url)
{
$content = self::fetch($url, true);
$content = $content['content'];
if ($content)
{
$result = (array) json_decode($content);
}
else
{
$result = array();
}
return $result;
}
protected $url;
protected $url_params = null;
protected $info = null;
protected $source = null;
protected $metadata = null;
protected $links = null;
protected $title = null;
protected $mime = null;
protected $doc = null;
protected $config = array();
public function __construct($url, $config = array())
{
$this->url = $url;
$this->config = $config;
}
public function config($key = '', $default = null)
{
return isset($this->config[$key]) ? $this->config[$key] : $default;
}
/**
* Url of the resource
*
* @return string
*/
public function url()
{
return $this->url;
}
public function url_domain()
{
$url = $this->url();
$url = trim($url, '/');
if (strpos($url, '//') !== false)
{
$parts = explode('//', $url);
$url = end($parts);
}
$parts = explode('/', $url);
$result = reset($parts);
return $result;
}
/**
*
* @param array|string $part
* @return boolean
*/
public function url_match($part)
{
$params = func_get_args();
$params = is_array($params) ? $params : array($params);
$url = strtolower($this->url());
foreach ($params as $param)
{
if (strpos($url, strtolower($param)) !== false)
{
return true;
}
}
return false;
}
public function url_params()
{
if (!is_null($this->url_params))
{
return $this->url_params;
}
$url = $this->url();
if (strpos($url, '?') === false)
{
return $this->url_params = array();
}
$result = array();
$params = explode('?', $url);
$params = end($params);
$params = explode('&', $params);
foreach ($params as $param)
{
list($key, $val) = explode('=', $param);
$result[$key] = $val;
}
return $this->url_params = $result;
}
public function url_param($name, $default = false)
{
$params = $this->url_params();
return isset($params[$name]) ? $params[$name] : $default;
}
/**
* The name of the resource. I.e. the last part of the url without the ext
*
* @return string
*/
public function name()
{
$url = $this->url();
$url = explode('/', $url);
$title = end($url);
$title = explode('.', $title);
$title = reset($title);
return $title;
}
/**
* Extention of the url
*
* @return string
*/
public function ext()
{
$url = $this->url();
$url = explode('.', $url);
$ext = end($url);
$ext = strtolower($ext);
return $ext;
}
/**
* Return true if the object has one of the extentions. Overloaded:
*
* $res->has_ext('pdf');
* $res->has_ext('pdf', 'doc');
* $res->has_ext(array('pdf', 'doc'));
*
* @param array|string $_
* @return boolean true if the resource has one of the extentions passed
*/
public function has_ext($_)
{
if (is_array($_))
{
$params = $_;
}
else
{
$params = func_get_args();
$params = is_array($params) ? $params : array($params);
}
$ext = $this->ext();
foreach ($params as $param)
{
if (strtolower($param) == $ext)
{
return true;
}
}
return false;
}
public function charset()
{
$info = $this->info();
$content_type = isset($info['content_type']) ? $info['content_type'] : '';
if (empty($content_type))
{
return null;
}
$items = explode(';', $content_type);
foreach ($items as $item)
{
$parts = explode('=', $item);
if (count($parts) == 2 && reset($parts) == 'charset')
{
return strtolower(end($parts));
}
}
return null;
}
/**
* The mime type of the resource or the empty string if none has been specified
*
* @return string
*/
public function mime()
{
if (!is_null($this->mime))
{
return $this->mime;
}
$info = $this->info();
$content_type = isset($info['content_type']) ? $info['content_type'] : '';
if ($content_type)
{
$result = reset(explode(';', $content_type));
$result = strtolower($result);
return $this->mime = $result;
}
return $this->mime = '';
}
public function is_xml()
{
$mime = $this->mime();
if (!empty($mime))
{
return strpos($mime, 'xml') !== false;
}
return $this->ext() == 'xml';
}
public function is_image()
{
$mime = $this->mime();
if ($mime)
{
return strpos($mime, 'image') !== false;
}
$ext = $this->ext();
$formats = array('gif', 'jpeg', 'jpg', 'jpe', 'pjpeg', 'png', 'svg', 'tiff', 'ico');
foreach ($formats as $format)
{
if ($format == $ext)
{
return true;
}
}
return false;
}
public function is_video()
{
$mime = $this->mime();
if ($mime)
{
return strpos($mime, 'video') !== false;
}
$ext = $this->ext();
$formats = array('mpeg', 'mp4', 'ogg', 'wmv', 'mkv');
foreach ($formats as $format)
{
if ($format == $ext)
{
return true;
}
}
return false;
}
public function is_audio()
{
$mime = $this->mime();
if ($mime)
{
return strpos($mime, 'audio') !== false;
}
$ext = $this->ext();
$formats = array('mp3');
foreach ($formats as $format)
{
if ($format == $ext)
{
return true;
}
}
return false;
}
public function is_rss()
{
if (!$this->is_xml())
{
return false;
}
$doc = $this->doc();
$nodes = $doc->getElementsByTagName('rss');
return $nodes->length != 0;
}
public function is_gadget()
{
if (!$this->is_xml())
{
return false;
}
$doc = $this->doc();
$nodes = $doc->getElementsByTagName('ModulePrefs');
return $nodes->length != 0;
}
public function canonic_url($src)
{
if (strpos($src, '//') === 0)
{
$src = "http:$src";
}
else if (strpos($src, '/') === 0) //relative url to the root
{
$url = $this->url();
$protocol = reset(explode('://', $url));
$domain = end(explode('://', $url));
$domain = reset(explode('/', $domain));
$src = "$protocol://$domain/$src";
}
else if (strpos($src, 'http') !== 0) //relative url to the document
{
$url = $this->url();
$tail = end(explode('/', $url));
$base = str_replace($tail, '', $url);
$src = $base . $src;
}
return $src;
}
/**
* Content of the resource.
*
* @return string
*/
public function source()
{
if (!is_null($this->source))
{
return $this->source;
}
$info = $this->info();
return $this->source = $info['content'];
}
/**
* Array of arrays containing the page's metadata.
*
* @return array
*/
public function metadata()
{
if (!is_null($this->metadata))
{
return $this->metadata;
}
return $this->metadata = $this->get_metadata();
}
public function title()
{
if (!is_null($this->title))
{
return $this->title;
}
return $this->title = $this->get_title();
}
/**
*
* @return DOMDocument|boolean
*/
public function doc()
{
if (!is_null($this->doc))
{
return $this->doc;
}
return $this->doc = $this->get_doc($this->source());
}
function get_meta($name)
{
$metadata = $this->metadata();
$name = strtolower($name);
foreach ($metadata as $attributes)
{
$key = isset($attributes['name']) ? $attributes['name'] : false;
$key = $key ? strtolower($key) : $key;
if ($name == $key)
{
return $attributes['content'];
}
$key = isset($attributes['property']) ? $attributes['property'] : false;
$key = $key ? strtolower($key) : $key;
if ($name == $key)
{
return isset($attributes['content']) ? $attributes['content'] : false;
}
}
return false;
}
function get_link($key, $value)
{
$links = $this->links();
$key = strtolower($key);
$value = strtolower($value);
foreach ($links as $attributes)
{
$a = isset($attributes[$key]) ? $attributes[$key] : false;
$a = $a ? strtolower($a) : $a;
if ($a == $value)
{
return $attributes;
}
}
return false;
}
public function links()
{
if (!is_null($this->links))
{
return $this->links;
}
return $this->links = $this->get_links();
}
/**
*
* @param string $xpath dom xpath
* @return string
*/
public function findx($query)
{
$doc = $this->doc();
if (empty($doc))
{
return array();
}
$xpath = new DOMXpath($doc);
$nodes = $xpath->query($query);
if ($nodes->length > 0)
{
return $doc->saveXML($nodes->item(0));
}
else
{
return '';
}
}
protected function info()
{
if (!is_null($this->info))
{
return $this->info;
}
return $this->info = self::fetch($this->url());
}
/**
*
* @param string $source
* @return boolean|DOMDocument
*/
protected function get_doc($source)
{
if ($source == false)
{
return false;
}
$source = $this->source();
$result = new DOMDocument();
libxml_clear_errors();
libxml_use_internal_errors(true);
if ($this->is_xml())
{
$success = $result->loadXML($source);
}
else
{
$success = $result->loadHTML($source);
}
//$e = libxml_get_errors();
return $result ? $result : false;
}
protected function get_metadata()
{
$result = array();
$doc = $this->doc();
if ($doc == false)
{
return array();
}
$metas = $doc->getElementsByTagName('meta');
if ($metas->length == 0)
{
return $result;
}
foreach ($metas as $meta)
{
$values = array();
$attributes = $meta->attributes;
$length = $attributes->length;
for ($i = 0; $i < $length; ++$i)
{
$name = $attributes->item($i)->name;
$value = $attributes->item($i)->value;
$value = $attributes->item($i)->value;
$values[$name] = $value;
}
$result[] = $values;
}
return $result;
}
protected function get_title()
{
$doc = $this->doc();
if ($doc == false)
{
return '';
}
$titles = $doc->getElementsByTagName('title');
if ($titles->length == 0)
{
return false;
}
$result = $titles->item(0)->nodeValue;
return $result;
}
protected function get_links()
{
$doc = $this->doc();
if ($doc == false)
{
return array();
}
$result = array();
$metas = $doc->getElementsByTagName('link');
if ($metas->length == 0)
{
return $result;
}
foreach ($metas as $meta)
{
$values = array();
$attributes = $meta->attributes;
$length = $attributes->length;
for ($i = 0; $i < $length; ++$i)
{
$name = $attributes->item($i)->name;
$value = $attributes->item($i)->value;
$values[$name] = $value;
}
$result[] = $values;
}
return $result;
}
}

113
main/inc/lib/external_media/renderer/lab/asset_google_calendar_renderer.class.php
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<?php
/**
* Google calendar renderer.
*
* @todo:
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetGoogleCalendarRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
$url = $asset->url();
$url = str_replace('http://', '', $url);
$url = str_replace('https://', '', $url);
$domain = reset(split('/', $url));
return strpos($domain, 'google.com/calendar') !== false;
}
/**
*
* @param string $url
*/
public function explode_url_parameters($url = null)
{
if (strpos($url, '?') === false)
{
return array();
}
$result = array();
$params = explode('?', $url);
$params = end($params);
$params = explode('&', $params);
foreach ($params as $param)
{
list($key, $val) = explode('=', $param);
$result[$key] = $val;
}
return $result;
}
public function implode_url_parameters($params)
{
$result = array();
foreach ($params as $key => $value)
{
if ($value)
{
$result[] = "$key=$value";
}
}
return join('&', $result);
}
protected function url($base = 'http:://map.google.com/', $params = array())
{
$head = reset(explode('?', $base));
$items = $this->explode_url_parameters($base);
foreach ($params as $key => $value)
{
$items[$key] = $value;
}
$tail = $this->implode_url_parameters($items);
$tail = empty($tail) ? '' : "?$tail";
return $head . $tail;
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$params = array('output' => 'embed');
$base = $asset->url();
$url = $this->url($base, $params);
$title = $asset->title();
$description = $asset->get_meta('description');
$keywords = $asset->get_meta('keywords');
$embed = <<<EOT
<iframe width="100%" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="$url"></iframe>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::THUMBNAIL] = $image_src;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

57
main/inc/lib/external_media/renderer/lab/asset_mahara_group_renderer.class.php
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<?php
/**
* Internal group. I.e. a group from this instance of Mahara.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetMaharaGroupRenderer extends AssetRenderer
{
public static function get_group_id($ref)
{
$ref = trim($ref);
$pattern = '#group/view.php\?id\=([0123456789]+)#';
$matches = array();
//mahara group's profile
if (preg_match($pattern, $ref, $matches))
{
return $matches[1];
}
//group id
if ($val = intval($ref))
{
return $val;
}
return false;
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
$url = $asset->url();
$group_id = self::get_group_id($url);
if (empty($group_id))
{
return false;
}
$data = get_record('group', 'id', $group_id);
$result = array();
safe_require('blocktype', 'ple/group');
$result[self::EMBED_SNIPPET] = PluginBlocktypeGroup::render_preview($group_id);
$result[self::THUMBNAIL] = PluginBlocktypeGroup::get_thumbnail($group_id);
$result[self::TITLE] = $data->name;
$result[self::DESCRIPTION] = $data->description;
return $result;
}
}

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main/inc/lib/external_media/renderer/lab/asset_mahara_person_renderer.class.php
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<?php
/**
*
* Internal person. I.e. a person from this instance of Mahara.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetMaharaPersonRenderer extends AssetRenderer
{
public static function get_user_id($ref)
{
$ref = trim($ref);
$pattern = '#user/view.php\?id\=([0123456789]+)#';
$matches = array();
//mahara user's profile
if (preg_match($pattern, $ref, $matches))
{
return $matches[1];
}
//email
if ($user = get_record('usr', 'email', $ref))
{
return $user->id;
}
//user id
if ($val = intval($ref))
{
return $val;
}
return false;
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
$url = $asset->url();
$id = self::get_user_id($url);
if (empty($id))
{
return false;
}
$data = get_record('usr', 'id', $id);
$result = array();
safe_require('blocktype', 'ple/person');
$result[self::EMBED_SNIPPET] = PluginBlocktypePerson::render_preview($id);
$result[self::THUMBNAIL] = PluginBlocktypePerson::get_thumbnail($id);
$result[self::TITLE] = $data->prefferedname ? $data->prefferedname : $data->firstname . ' ' . $data->lastname;
$result[self::DESCRIPTION] = isset($data->description) ? $data->description : '';
return $result;
}
}

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main/inc/lib/external_media/renderer/lab/asset_wiki_renderer.class.php
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<?php
/**
* Wiki renderer.
*
* @see http://en.wikipedia.org/w/api.php
*
* @copyright (c) 2012 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetWikiRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
return $asset->url_match('wikipedia.org/wiki', 'mediawiki.org/wiki');
}
/**
*
* @param HttpResource $asset
*
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$domain = $asset->url_domain();
$description = $asset->findx('//div[@id="bodyContent"]/p');
$result = array();
$result[self::EMBED_SNIPPET] = $description;
$result[self::TITLE] = $title;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

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main/inc/lib/external_media/renderer/protocol/asset_google_document_renderer.class.php
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<?php
/**
* Google document renderer.
*
* @see http://support.google.com/docs/bin/answer.py?hl=en&answer=86101&topic=1360911&ctx=topic
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetGoogleDocumentRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
$url = $asset->url();
return strpos($url, 'docs.google.com/document/pub') !== false;
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$url = $asset->url();
$title = $asset->title();
$description = $asset->get_meta('description');
$keywords = $asset->get_meta('keywords');
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$embed = <<<EOT
<div style="height:{$size}px;" class="resize vertical" >
<iframe style=background-color:#ffffff;" width="100%" height="100%" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="$url"></iframe>
</div>
<style type="text/css">
div.resize.vertical {
background-color: #EEEEEE;
border-color: #EEEEEE;
border-style: solid;
border-width: 1px;
resize:vertical;
overflow: hidden;
padding-bottom:15px;
min-height:24px;
max-height:800px;
}
</style>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

95
main/inc/lib/external_media/renderer/protocol/asset_google_document_viewer_renderer.class.php
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<?php
/**
* Google document viewer renderer. Provide an embeded viewer for the following
* documetn types:
*
* Microsoft Word (.DOC and .DOCX)
* Microsoft Excel (.XLS and .XLSX)
* Microsoft PowerPoint (.PPT and .PPTX)
* Adobe Portable Document Format (.PDF)
* Apple Pages (.PAGES)
* Adobe Illustrator (.AI)
* Adobe Photoshop (.PSD)
* Tagged Image File Format (.TIFF)
* Autodesk AutoCad (.DXF)
* Scalable Vector Graphics (.SVG)
* PostScript (.EPS, .PS)
* TrueType (.TTF)
* XML Paper Specification (.XPS)
* Archive file types (.ZIP and .RAR)
*
* @see https://docs.google.com/viewer
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetGoogleDocumentViewerRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
$supported_extentions = array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'pdf', 'pages', 'ai', 'psd', 'tiff', 'dxf', 'svg', 'eps', 'ps', 'eps', 'ttf', 'zip', 'rar');
return $asset->has_ext($supported_extentions);
}
protected function url($document_url)
{
return 'https://docs.google.com/viewer?embedded=true&url=' . urlencode($document_url);
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$url = $this->url($asset->url());
$title = $asset->title();
$description = $asset->get_meta('description');
$keywords = $asset->get_meta('keywords');
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$embed = <<<EOT
<div style="height:{$size}px;" class="resize vertical" >
<iframe style=background-color:#ffffff;" width="100%" height="100%" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="$url"></iframe>
</div>
<style type="text/css">
div.resize.vertical {
background-color: #EEEEEE;
border-color: #EEEEEE;
border-style: solid;
border-width: 1px;
resize:vertical;
overflow: hidden;
padding-bottom:15px;
min-height:24px;
max-height:800px;
}
</style>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
//$result[self::THUMBNAIL] = $image_src;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

129
main/inc/lib/external_media/renderer/protocol/asset_google_map_renderer.class.php
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<?php
/**
* Google map page renderer.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetGoogleMapRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
$url = $asset->url();
$url = str_replace('http://', '', $url);
$url = str_replace('https://', '', $url);
$domain = reset(explode('/', $url));
return strpos($domain, 'maps.google') !== false;
}
/**
*
* @param string $url
*/
public function explode_url_parameters($url = null)
{
if (strpos($url, '?') === false)
{
return array();
}
$result = array();
$params = explode('?', $url);
$params = end($params);
$params = explode('&', $params);
foreach ($params as $param)
{
list($key, $val) = explode('=', $param);
$result[$key] = $val;
}
return $result;
}
public function implode_url_parameters($params)
{
$result = array();
foreach ($params as $key => $value)
{
if ($value)
{
$result[] = "$key=$value";
}
}
return join('&', $result);
}
protected function url($base = 'http:://map.google.com/', $params = array())
{
$head = reset(explode('?', $base));
$items = $this->explode_url_parameters($base);
foreach ($params as $key => $value)
{
$items[$key] = $value;
}
$tail = $this->implode_url_parameters($items);
$tail = empty($tail) ? '' : "?$tail";
return $head . $tail;
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$params = array('output' => 'embed');
$base = $asset->url();
$url = $this->url($base, $params);
$title = $asset->title();
$description = $asset->get_meta('description');
$keywords = $asset->get_meta('keywords');
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$embed = <<<EOT
<div style="height:{$size}px;" class="resize vertical" >
<iframe style=background-color:#ffffff;" width="100%" height="100%" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="$url"></iframe>
</div>
<style type="text/css">
div.resize.vertical {
background-color: #EEEEEE;
border-color: #EEEEEE;
border-style: solid;
border-width: 1px;
resize:vertical;
overflow: hidden;
padding-bottom:15px;
min-height:24px;
max-height:800px;
}
</style>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

90
main/inc/lib/external_media/renderer/protocol/asset_google_widget_renderer.class.php
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<?php
/**
* Google widget/gadget renderer.
* Accept the following urls:
*
* module: http://www.google.com/ig/directory?type=gadgets&url=www.google.com/ig/modules/eyes/eyes.xml
* directory entry: www.google.com/ig/modules/eyes/eyes.xml
* configured url: www.gmodules.com/ig/ifr?url=http://www.google.com/ig/modules/eyes/eyes.xml&amp;synd=open&amp;w=320&amp;h=121&amp;title=__MSG_title__&amp;lang=fr&amp;country=ALL&amp;border=%23ffffff%7C3px%2C1px+solid+%23999999&amp;output=js
*
* @see http://www.google.com/ig/directory?type=gadgets&url=www.google.com/ig/modules/eyes/eyes.xml
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetGoogleWidgetRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if ($asset->url_match('gmodules.com/ig/') && $asset->url_param('url') != false)
{
$url = $asset->url();
$title = $asset->url_param('title');
$title = ($title == '__MSG_title__') ? '' : $title;
$embed = <<<EOT
<script src="$url"></script>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
return $result;
}
if (!$asset->is_gadget())
{
$url = $asset->url();
if (!$asset->url_match('google.com/ig/directory'))
{
return false;
}
if (!$asset->url_match('type=gadgets'))
{
return false;
}
$url = $asset->url_param('url');
if (empty($url))
{
return false;
}
$asset = new HttpResource($url);
if (!$asset->is_gadget())
{
return false;
}
}
$url = $asset->url();
if (strpos($url, 'http') !== 0)
{
$url = "http://$url";
}
$url = urlencode($url);
$title = $asset->title();
$title = $title ? $title : $asset->name();
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$embed = <<<EOT
<script src="//www.gmodules.com/ig/ifr?url=$url&amp;w=$size&amp;output=js"></script>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
return $result;
}
}

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main/inc/lib/external_media/renderer/protocol/asset_image_renderer.class.php
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<?php
/**
* Process image resources. I.e. png, jpeg, etc.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetImageRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (! $asset->is_image())
{
return false;
}
global $THEME;
$url = $asset->url();
$title = $asset->title();
$title = $title ? $title : $asset->name();
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$embed = <<<EOT
<div style="text-align:center"><a href="$url"><img src="{$url}" width="$size" alt="{$title}" title="{$title}"></a></div>
EOT;
$result = array();
$result[self::URL] = $url;
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::THUMBNAIL] = $url;
return $result;
}
}

65
main/inc/lib/external_media/renderer/protocol/asset_media_renderer.class.php
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<?php
/**
* Media renderer. I.e. video streams that can be embeded through an embed tag.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetMediaRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
if ($asset->is_video())
{
return true;
}
//swf mime type is application/x-shockwave-flash
return $asset->has_ext('swf');
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$url = $asset->url();
$title = $asset->title();
$description = $asset->get_meta('description');
$keywords = $asset->get_meta('keywords');
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$width = $size;
$height = $size *9/16;
$embed = <<<EOT
<div style="text-align:center;"><embed style="display:inline-block;" width="{$width}px" height="{$height}px" name="plugin" src="$url" ></div>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::DESCRIPTION] = $description;
$result[self::TAGS] = $keywords;
return $result;
}
}

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main/inc/lib/external_media/renderer/protocol/asset_mediaserver_renderer.class.php
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<?php
/**
* Media Server renderer.
*
* Note that some videos are protected. It is therefore not possible to use the
* autodiscovery feature. That is to get the web page, look at the meta data headers
* and read the oembed api call. This would only work for public content/javascript
* bookmarklet.
*
* So here we bypass the discovery service and directly call the API endpoint
* with the page url to retrieve oembed metadata - which happens to be public.
*
* @see https://mediaserver.unige.ch
*
* @copyright (c) 2012 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetMediaserverRenderer extends AssetRenderer
{
const API_ENDPOINT = 'http://129.194.20.121/oembed/unige-oembed-provider-test.php';
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
return $asset->url_match('https://mediaserver.unige.ch/play/') ||$asset->url_match('http://mediaserver.unige.ch/play/');
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$width = (int) $asset->config('size');
$width = (24 <= $width && $width <= 800) ? $width : 300;
$url = $asset->url();
$oembed = self::API_ENDPOINT . '?url=' . urlencode($url) . '&maxwidth=' . $width;
$data = HttpResource::fetch_json($oembed);
if (empty($data))
{
return false;
}
$result[self::THUMBNAIL] = isset($data['thumbnail_url']) ? $data['thumbnail_url'] : '';
$result[self::TITLE] = isset($data['title']) ? $data['title'] : '';
$result[self::EMBED_SNIPPET] = isset($data['html']) ? $data['html'] : '';
return $result;
}
}

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main/inc/lib/external_media/renderer/protocol/asset_oembed_renderer.class.php
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<?php
/**
* Process html pages that support the oembed protocol.
*
* Note that here we rely on the discovery service. That is each page that contains in
* its metadata the oembed request.
*
* @see http://oembed.com/
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*
*/
class AssetOembedRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
$link = $asset->get_link('type', 'application/json+oembed');
if (empty($link))
{
return false;
}
$width = (int) $asset->config('size');
$width = (24 <= $width && $width <= 800) ? $width : 300;
$href = $link['href'];
$data = HttpResource::fetch_json("$href&maxwidth=$width"); //&maxheight=$height
if (empty($data))
{
return false;
}
$data['title'] = isset($data['title']) ? $data['title'] : '';
$data['width'] = isset($data['width']) ? intval($data['width']) : '';
$data['height'] = isset($data['height']) ? intval($data['height']) : '';
$type = $data['type'];
$f = array($this, "render_$type");
if (is_callable($f))
{
$result = call_user_func($f, $asset, $data);
}
else
{
$result = array();
}
$result[self::THUMBNAIL] = isset($data['thumbnail_url']) ? $data['thumbnail_url'] : '';
$result[self::TITLE] = isset($data['title']) ? $data['title'] : '';
return $result;
}
protected function render_photo($asset, $data)
{
if ($data['type'] != 'photo')
{
return array();
}
$result = array();
$html = isset($data['html']) ? $data['html'] : '';
if ($html)
{
$result[self::EMBED_SNIPPET] = '<div style="display:inline-block">' . $html . '</div>';
return $result;
}
$title = $data['title'];
$width = (int)$data['width'];
$height = (int)$data['height'];
// $ratio = $height / $width;
// $height = $ratio * $width;
$url = $data['url'];
$embed = <<<EOT
<div><a href="$url"><img src="{$url}" width="{$width}" height="{$height}" "alt="{$title}" title="{$title}"></a></div>
EOT;
$result[self::EMBED_SNIPPET] = $embed;
return $result;
}
protected function render_video($asset, $data)
{
if ($data['type'] != 'video')
{
return array();
}
$result = array();
$result[self::EMBED_SNIPPET] = '<div style="display:inline-block">' . $data['html'] . '</div>';
return $result;
}
protected function render_rich($asset, $data)
{
if ($data['type'] != 'rich')
{
return array();
}
$result = array();
$result[self::EMBED_SNIPPET] = '<div style="display:inline-block">' . $data['html'] . '</div>';
return $result;
}
protected function render_link($asset, $data)
{
if ($data['type'] != 'link')
{
return array();
}
return array();
}
}

201
main/inc/lib/external_media/renderer/protocol/asset_og_renderer.class.php
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<?php
/**
* Process pages that support the open graph protocol
*
* @see http://ogp.me/
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetOgRenderer extends AssetRenderer
{
/**
* Renderer function. Take a http asset as input and return an array containing
* various properties: metadata, html snippet, etc.
*
* @param HttpResource $asset
* @return array
*/
public function render($asset)
{
$type = $asset->get_meta('og:type');
if (empty($type))
{
if ($video = $asset->get_meta('og:video'))
{
$type = 'video';
}
else if ($video = $asset->get_meta('og:image'))
{
$type = 'default';
}
}
if (empty($type))
{
return array();
}
$type = explode('.', $type);
$type = reset($type);
$f = array($this, "render_$type");
if (is_callable($f))
{
$result = call_user_func($f, $asset);
}
else
{
$result = $this->render_default($asset);
}
$result[self::TITLE] = $asset->get_meta('og:title');
$result[self::THUMBNAIL] = $asset->get_meta('og:image');
$result[self::LANGUAGE] = $asset->get_meta('og:language');
return $result;
}
/**
* @param HttpResource $asset
* @return array
*/
protected function render_video($asset)
{
$url = $asset->get_meta('og:video');
$url = str_replace('?autoPlay=1', '?', $url);
$url = str_replace('&autoPlay=1', '', $url);
if (empty($url))
{
return array();
}
$type = $asset->get_meta('og:video:type');
if ($type)
{
$type = ' type="' . $type . '" ';
}
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$width = $asset->get_meta('og:video:width');
$width = $width ? $width : $asset->get_meta('video_width');
$height = $asset->get_meta('og:video:height');
$height = $height ? $height : $asset->get_meta('video_height');
if ($width)
{
$ratio = $height / $width;
$base = min($size, $width);
$width = $base;
$height = $ratio * $base;
$size = 'width="' . $width . '" height="' . $height . '"';
}
else
{
$size = 'width="' . $size . '"';
}
$embed = <<<EOT
<embed $type $size src="$url" />
EOT;
$result[self::EMBED_TYPE] = $type;
$result[self::EMBED_URL] = $url;
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TAGS] = $asset->get_meta('og:video:tag');
$result[self::CREATED_TIME] = $asset->get_meta('og:video:release_date');
$result[self::DURATION] = $asset->get_meta('og:duration');
return $result;
}
protected function render_article($asset)
{
$result = $this->render_default($asset);
return $result;
}
protected function render_audio($asset)
{
$result = $this->render_default($asset);
return $result;
}
protected function render_book($asset)
{
$result = $this->render_default($asset);
return $result;
}
/**
*
* @param HttpResource $asset
* @return array
*/
protected function render_default($asset)
{
$url = $asset->get_meta('og:url');
$url = htmlentities($url);
$title = $asset->get_meta('og:title');
$image = $asset->get_meta('og:image');
$image = htmlentities($image);
$width = $asset->get_meta('og:image:width');
$height = $asset->get_meta('og:image:height');
$description = $asset->get_meta('og:description');
$description = $description ? $description : $asset->get_meta('description');
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
if ($width)
{
$ratio = $height / $width;
$base = min($size, $width);
$width = $base;
$height = $ratio * $base;
$size = 'width="' . $width . '" height="' . $height . '"';
}
else
{
$size = 'width="' . $size . '"';
}
$embed = <<<EOT
<div>
<a href="$url" style="float:left; margin-right:5px; margin-bottom:5px; display:block;"><img src="{$image}" {$size} alt="{$title}" title="{$title}"></a>
<div style="clear:both;"></div>
</div>
EOT;
$result[self::EMBED_SNIPPET] = $embed;
$result[self::DESCRIPTION] = $asset->get_meta('description');
return $result;
}
/**
* @param HttpResource $asset
* @return array
*/
protected function render_image($asset)
{
$size = (int) $asset->config('size');
$size = (24 <= $size && $size <= 800) ? $size : 300;
$title = $data['title'];
$width = $data['width'];
$height = $data['height'];
$ratio = $height / $width;
$base = min($size, $width);
$width = $base;
$height = $ratio * $base;
$url = $data['url'];
$embed = <<<EOT
<a href="$url"><img src="{$url}" width="{$width}" height="{$height} "alt="{$title}" title="{$title}"></a>
EOT;
}
}

83
main/inc/lib/external_media/renderer/protocol/asset_page_renderer.class.php
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<?php
/**
* Generic HTML page renderer. Process any html page.
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetPageRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
global $THEME;
$url = $asset->url();
$title = $asset->title();
$title = $title ? $title : $asset->name();
$description = $asset->get_meta('description');
$description = $description;
$keywords = $asset->get_meta('keywords');
$image_src = $asset->get_link('rel', 'image_src');
$image_src = $image_src ? $image_src['href'] : false;
if (empty($image_src))
{
$image_src = $this->get_icon($asset);
}
$icon = $this->get_icon($asset);
$image_src = $asset->canonic_url($image_src);
$icon = $asset->canonic_url($icon);
$embed = <<<EOT
<a href="$url">
<img src="{$image_src}" alt="{$title}" title="{$title}" style="float:left; margin-right:5px; margin-bottom:5px; " >
</a>
$description
<span style="clear:both;"></span>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
$result[self::THUMBNAIL] = $image_src;
$result[self::DESCRIPTION] = $description;
$result[self::ICON] = $icon;
$result[self::TAGS] = $keywords;
return $result;
}
function get_icon($asset)
{
$icon = $asset->get_link('rel', 'apple-touch-icon');
$icon = $icon ? $icon['href'] : false;
if (empty($icon))
{
$icon = $asset->get_link('rel', 'fluid-icon');
$icon = $icon ? $icon['href'] : false;
}
if (empty($icon))
{
$icon = $asset->get_link('rel', 'shortcut icon');
$icon = $icon ? $icon['href'] : false;
}
if (empty($icon))
{
$icon = $asset->get_link('rel', 'icon');
$icon = $icon ? $icon['href'] : false;
}
return $icon;
}
}

95
main/inc/lib/external_media/renderer/protocol/asset_rss_renderer.class.php
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<?php
/**
* Rss renderer. Display RSS thanks to Google feed control.
*
* @see http://www.google.com/uds/solutions/dynamicfeed/reference.html
* @see http://code.google.com/apis/ajax/playground/#dynamic_feed_control_-_vertical
*
* @copyright (c) 2011 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetRssRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$asset->is_rss())
{
return;
}
$url = $asset->url();
$title = $asset->title();
$id = 'a' . md5($url);
$embed = <<<EOT
<style type="text/css">
.gfg-root {
border: none;
font-family: inherit;
}
</style>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script src="http://www.google.com/uds/solutions/dynamicfeed/gfdynamicfeedcontrol.js" type="text/javascript"></script>
<script type="text/javascript">
function init()
{
if (typeof this.has_run == 'undefined' )
{
this.has_run = true;
}
else
{
return;
}
var head = document.getElementsByTagName('head')[0];
var element = document.createElement('link');
element.type = 'text/css';
element.rel = 'stylesheet';
element.href = 'http://www.google.com/uds/solutions/dynamicfeed/gfdynamicfeedcontrol.css';
head.appendChild(element);
}
function load_$id() {
var feeds = [
{
title: ' ',
url: '$url'
}
];
var options = {
stacked : false,
horizontal : false,
title : '',
numResults : 10
};
new GFdynamicFeedControl(feeds, '$id', options);
document.getElementById('content').style.width = "500px";
}
init();
google.load('feeds', '1');
google.setOnLoadCallback(load_$id);
</script>
<div id="$id" style="min-height:271px;">Loading...</div>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::TITLE] = $title;
return $result;
}
}

76
main/inc/lib/external_media/renderer/protocol/asset_scratch_renderer.class.php
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<?php
/**
* Scratch renderer.
*
* @see http://scratch.mit.edu/projects/
*
* @copyright (c) 2012 University of Geneva
* @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
* @author Laurent Opprecht
*/
class AssetScratchRenderer extends AssetRenderer
{
/**
*
* @param HttpResource $asset
*/
public function accept($asset)
{
return $asset->url_match('http://scratch.mit.edu/projects/');
}
/**
*
* @param HttpResource $asset
*/
public function render($asset)
{
if (!$this->accept($asset))
{
return;
}
$matches = array();
$pattern = "#http:\/\/scratch.mit.edu\/projects\/(\w+)/(\d*)\/?#ims";
preg_match($pattern, $asset->url(), $matches);
$url = $matches[0];
$author = $matches[1];
$project_id = $matches[2];
$project_url = "../../static/projects/$author/$project_id.sb";
$image_url = "http://scratch.mit.edu/static/projects/$author/{$project_id}_med.png";
$thumb_url = "http://scratch.mit.edu/static/projects/$author/{$project_id}_sm.png";
$height = 387;
$width = 482;
if (function_exists('get_string'))
{
$no_java = get_string('no_java', 'artefact.extresource');
}
else
{
$no_java = 'Java is not installed on your computer. You must install java first.';
}
$embed = <<<EOT
<object type="application/x-java-applet" width="$width" height="$height" style="display:block" id="ProjectApplet">
<param name="codebase" value="http://scratch.mit.edu/static/misc">
<param name="archive" value="ScratchApplet.jar">
<param name="code" value="ScratchApplet">
<param name="project" value="$project_url">
<pre>$no_java</pre>
<img alt="" src="$image_url">
</object>
EOT;
$result = array();
$result[self::EMBED_SNIPPET] = $embed;
$result[self::THUMBNAIL] = $thumb_url;
return $result;
}
}
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