include/Dashlets/DashletRssFeedTitle.php

   1 <?php
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  36
  37
  38 /**
  39  * Class for parsing title from RSS feed, and keep default encoding (UTF-8)
  40  * Created: Sep 12, 2011
  41  */
  42 class DashletRssFeedTitle {
  43         public $defaultEncoding = "UTF-8";
  44         public $readBytes = 8192;
  45         public $url;
  46         public $cut = 70;
  47         public $contents = "";
  48         public $title = "";
  49         public $endWith = "...";
  50         public $xmlEncoding = false;
  51         public $fileOpen = false;
  52
  53         public function __construct($url) {
  54                 $this->url = $url;
  55         }
  56
  57         public function generateTitle() {
  58                 if ($this->readFeed()) {
  59                         $this->getTitle();
  60                         if (!empty($this->title)) {
  61                                 $this->convertEncoding();
  62                                 $this->cutLength();
  63                         }
  64                 }
  65                 return $this->title;
  66         }
  67
  68         /**
  69          * @todo use curl with waiting timeout instead of fopen
  70          */
  71         public function readFeed() {
  72                 if ($this->url) {
  73                         $fileOpen = @fopen($this->url, 'r');
  74                         if ($fileOpen) {
  75                                 $this->fileOpen = true;
  76                                 $this->contents = fread($fileOpen, $this->readBytes);
  77                                 fclose($fileOpen);
  78                                 return true;
  79                         }
  80                 }
  81                 return false;
  82         }
  83
  84         /**
  85          *
  86          */
  87         public function getTitle() {
  88                 $matches = array ();
  89                 preg_match("/<title>.*?<\/title>/i", $this->contents, $matches);
  90                 if (isset($matches[0])) {
  91                         $this->title = str_replace(array('<![CDATA[', '<title>', '</title>', ']]>'), '', $matches[0]);
  92                 }
  93         }
  94
  95         public function cutLength() {
  96                 if (mb_strlen(trim($this->title), $this->defaultEncoding) > $this->cut) {
  97                         $this->title = mb_substr($this->title, 0, $this->cut, $this->defaultEncoding) . $this->endWith;
  98                 }
  99         }
 100
 101         private function _identifyXmlEncoding() {
 102                 $matches = array ();
 103                 preg_match('/encoding\=*\".*?\"/', $this->contents, $matches);
 104                 if (isset($matches[0])) {
 105                         $this->xmlEncoding = trim(str_replace('encoding="', '"', $matches[0]), '"');
 106                 }
 107         }
 108
 109         public function convertEncoding() {
 110                 $this->_identifyXmlEncoding();
 111                 if ($this->xmlEncoding && $this->xmlEncoding != $this->defaultEncoding) {
 112                         $this->title = iconv($this->xmlEncoding, $this->defaultEncoding, $this->title);
 113                 }
 114         }
 115 }