<?php
/*
Program Name: sm00sh Processor Library
Program URI: http://smsh.me/action/api
Description: A lib to be used by external plugins in order to converts all URLs in a text into shorten URLs using the sm00sh service at http://smsh.me.
Author: Lopo Lencastre de Almeida <dev@ipublicis.com>, Copyright 2009
Version: 1.0
Author URI: http://www.ipublicis.com
Donate: http://smsh.me/7kit
License: GNU LGPL v3 or later
*/
/**
Class sm00sher
main class section.
*/
class smsh {
/**
smsh_parse
this function search the content for http links and then convert them to sm00sh'ed ones.
@param string $content the original content
@return string $content the modified content
*/
public function smsh_parse($content)
{
$urls = $this->_smsh_all_links($content);
foreach ($urls as $url) {
$content = str_ireplace($url['bigurl'], $url['smsh'], $content);
}
return $content;
}
/**
_smsh_all_links
get all content's URLs using native PHP DOM and sends them for processing.
@param string $content the content to process
@return array $urls the array containing the original and the sm00s'ed URLs
*/
protected function _smsh_all_links($content)
{
$urls = array();
$dom = new DOMDocument();
$dom->preserveWhiteSpace = FALSE;
@$dom->loadHTML($content);
$atags = $dom->getElementsByTagName('a');
foreach ($atags as $atag) {
$the_url = $atag->getAttribute('href');
$new_url = $this->_smsh_process($the_url);
$urls[] = array( 'bigurl' => $the_url, 'smsh' => $new_url );
}
return($urls);
}
/**
_smsh_process
this function sends the original URL to sm00sh and returns a shorten new one. Requires cURL and SimpleXML.
@param string $url the source url
@return string $surl the shorten url or, on error, the original unmodified one
*/
protected function _smsh_process($url)
{
$surl = $url;
if($this->_valid_url($url)) // URLs *MUST* be valid ones
{
$sm00sher = 'http://smsh.me/?api=xml&url='.$url;
$curl_handle=curl_init();
curl_setopt($curl_handle,CURLOPT_URL,$sm00sher);
curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
$buffer = curl_exec($curl_handle);
curl_close($curl_handle);
if (!empty($buffer))
{
$xml = @simplexml_load_string($buffer);
if (isset($xml))
{
$title = @trim($xml->title);
$body = @trim($xml->body);
if( $title == 'HTTP/1.0 200 OK' && !empty($body) )
{
$surl = $body;
}
}
}
}
return $surl;
}
/**
_valid_url
check if a URL string is valid or not
@param string $url the source url
@return bollean $is_url true of is valid or false if it isn't
*/
protected function _valid_url($url)
{
return ( ! preg_match('/^(http|https|ftp|sftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i', $url)) ? FALSE : TRUE;
}
} // EOF
?>
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