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VideoEmbed.php
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VideoEmbed.php
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<?php
/**
* Video embedding libary
* Provides a feature for embedding videos (YouTube, Google Video, Revver, Metacafe, LiveLeak,
* Dostub and Vimeo) in a report
*
* @package VideoEmbed
* @author Ushahidi Team
* @copyright (c) 2008 Ushahidi Team
* @license http://www.ushahidi.com/license.html
*/
class VideoEmbed
{
/**
* @var current video url
*/
private $url = FALSE;
/**
* @var name of current service
*/
private $service_name = FALSE;
/**
* @var config array for current service
*/
private $service = array();
/**
* Get the services supported by VideoEmbed
*
* @return array
*/
private function services()
{
$services = array(
"youtube" => array(
'baseurl' => "http://www.youtube.com/watch?v=",
'searchstring' => 'youtube.com',
'oembed' => 'http://www.youtube.com/oembed',
'keep-params' => 'v'
),
// May now be defunct
"google" => array(
'baseurl' => "http://video.google.com/videoplay?docid=-",
'searchstring' => 'google.com',
'keep-params' => 'docid'
),
"metacafe" => array(
'baseurl' => "http://www.metacafe.com/watch/",
'searchstring' => 'metacafe.com',
),
"dotsub" => array(
'baseurl' => "http://dotsub.com/view/",
'searchstring' => 'dotsub.com',
'oembed' => 'http://dotsub.com/services/oembed',
),
"vimeo" => array(
'baseurl' => "http://vimeo.com/",
'searchstring' => 'vimeo.com',
'oembed' => 'http://vimeo.com/api/oembed.json',
),
);
Event::run('ushahidi_filter.video_embed_services', $services);
return $services;
}
/**
* Set current video url and preprocess
*
* @param string $url video url
**/
public function set_url($url)
{
$this->service_name = $this->detect_service($url);
if ($this->service_name !== FALSE)
{
$services = $this->services();
$this->service = $services[$this->service_name];
}
$this->url = $this->clean_url($url);
}
/**
* Convert raw url to standard structure
* Particularly needed for youtube where v= param must be first
*
* @param string $raw raw url
* @return string standarized url
*/
private function clean_url($raw)
{
if (isset($this->service['keep-params']))
{
$components = parse_url($raw);
parse_str($components['query'], $query);
if (! isset($query[$this->service['keep-params']]) ) break;
$raw = $this->service['baseurl']. $query[$this->service['keep-params']];
}
return $raw;
}
/**
* Detect video services based on URL
*
* @param string $raw video url
* @return string $service_name service name
*/
private function detect_service($raw)
{
// To hold the name of the video service
$service_name = "";
// Trim whitespaces from the raw data
$raw = trim($raw);
// Array of the supportted video services
$services = $this->services();
// Determine the video service to use
$service_name = FALSE;
foreach ($services as $key => $value)
{
// Match raw url against service search string
if (strpos($raw, $value['searchstring']))
{
$service_name = $key;
break;
}
}
$data = array($services, $service_name);
Event::run('ushahidi_filter.video_embed_detect_services', $data);
list($services, $service_name) = $data;
return $service_name;
}
/**
* Generates the HTML for embedding a video
*
* @param string $raw URL of the video to be embedded
* @param boolean $auto Autoplays the video as soon as its loaded
* @param boolean $echo Should we echo the embed code or just return it
* @return
*/
public function embed($raw, $auto = FALSE, $echo = TRUE)
{
$this->set_url($raw);
$output = FALSE;
// Get video code from url.
if (isset($this->service['baseurl']))
{
$code = str_replace($this->service['baseurl'], "", $this->url);
}
switch($this->service_name)
{
case "youtube":
// Check for autoplay
$you_auto = ($auto) ? "&autoplay=1" : "";
$output = '<iframe id="ytplayer" type="text/html" width="320" height="265" '
. 'src="//www.youtube.com/embed/'.html::escape($code).'?origin='.urlencode(url::base()).html::escape($you_auto).'" '
. 'frameborder="0"></iframe>';
break;
case "google":
// Check for autoplay
$google_auto = ($auto) ? "&autoPlay=true" : "";
$output = "<embed style='width:320px; height:265px;' id='VideoPlayback' type='application/x-shockwave-flash'"
. " src='//video.google.com/googleplayer.swf?docId=-".html::escape($code.$google_auto)."&hl=en' flashvars=''>"
. "</embed>";
break;
case "metacafe":
// Sanitize input
$code = strrev(trim(strrev($code), "/"));
$output = "<embed src='http://www.metacafe.com/fplayer/".html::escape($code).".swf'"
. " width='320' height='265' wmode='transparent' pluginspage='http://get.adobe.com/flashplayer/'"
. " type='application/x-shockwave-flash'> "
. "</embed>";
break;
case "dotsub":
$output = "<iframe src='http://dotsub.com/media/".html::escape($code)."' frameborder='0' width='320' height='500'></iframe>";
break;
case "vimeo":
$vimeo_auto = ($auto) ? "?autoplay=1" : "";
$output = '<iframe src="//player.vimeo.com/video/'.html::escape($code.$vimeo_auto).'" width="320" height="265" frameborder="0">'
. '</iframe>';
break;
}
$data = array($this->service_name, $output);
Event::run('ushahidi_filter.video_embed_embed', $data);
list($this->service_name, $output) = $data;
if (!$output)
{
$output = '<a href="'.$this->url.'" target="_blank">'.Kohana::lang('ui_main.view_video').'</a>';
}
if ($echo) echo $output;
return $output;
}
/**
* Generates the thumbnail a video
*
* @param string $raw URL of the video
* @return string url of video thumbnail
*/
public function thumbnail($raw)
{
$this->set_url($raw);
$output = FALSE;
if (isset($this->service['oembed']))
{
$url = $this->service['oembed']."?url=".urlencode($this->url);
$request = new HttpClient($url);
$result = $request->execute();
if ($result !== FALSE)
{
$oembed = json_decode($result);
if (!empty($oembed) AND ! empty($oembed->thumbnail_url))
{
$output = $oembed->thumbnail_url;
}
}
}
$data = array($this->service_name, $output);
Event::run('ushahidi_filter.video_embed_thumbnail', $data);
list($this->service_name, $output) = $data;
return $output;
}
}
?>