classes/feeditem/atom.php

   1 <?php
   2 class FeedItem_Atom extends FeedItem_Common {
   3
   4         function get_id() {
   5                 $id = $this->elem->getElementsByTagName("id")->item(0);
   6
   7                 if ($id) {
   8                         return $id->nodeValue;
   9                 } else {
  10                         return $this->get_link();
  11                 }
  12         }
  13
  14         function get_date() {
  15                 $updated = $this->elem->getElementsByTagName("updated")->item(0);
  16
  17                 if ($updated) {
  18                         return strtotime($updated->nodeValue);
  19                 }
  20
  21                 $published = $this->elem->getElementsByTagName("published")->item(0);
  22
  23                 if ($published) {
  24                         return strtotime($published->nodeValue);
  25                 }
  26
  27                 $date = $this->xpath->query("dc:date", $this->elem)->item(0);
  28
  29                 if ($date) {
  30                         return strtotime($date->nodeValue);
  31                 }
  32         }
  33
  34         function rel2abs($rel, $base)
  35         {
  36             /* return if already absolute URL */
  37             if (parse_url($rel, PHP_URL_SCHEME) != '') return $rel;
  38
  39             /* queries and anchors */
  40             if ($rel[0]=='#' || $rel[0]=='?') return $base.$rel;
  41
  42             /* parse base URL and convert to local variables:
  43                $scheme, $host, $path */
  44             extract(parse_url($base));
  45
  46             /* remove non-directory element from path */
  47             $path = preg_replace('#/[^/]*$#', '', $path);
  48
  49             /* destroy path if relative url points to root */
  50             if ($rel[0] == '/') $path = '';
  51
  52             /* dirty absolute URL */
  53             $abs = "$host$path/$rel";
  54
  55             /* replace '//' or '/./' or '/foo/../' with '/' */
  56             $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
  57             for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
  58
  59             /* absolute URL is ready! */
  60             return $scheme.'://'.$abs;
  61         }
  62
  63         function get_link() {
  64                 $links = $this->elem->getElementsByTagName("link");
  65
  66                 foreach ($links as $link) {
  67                         if ($link && $link->hasAttribute("href") &&
  68                                 (!$link->hasAttribute("rel")
  69                                         || $link->getAttribute("rel") == "alternate"
  70                                         || $link->getAttribute("rel") == "standout")) {
  71                                 $base = $this->xpath->evaluate("string(ancestor-or-self::*[@xml:base][1]/@xml:base)",$link);
  72                                 return $this->rel2abs($link->getAttribute("href"), $base);
  73                         }
  74                 }
  75         }
  76
  77         function get_title() {
  78                 $title = $this->elem->getElementsByTagName("title")->item(0);
  79
  80                 if ($title) {
  81                         return $title->nodeValue;
  82                 }
  83         }
  84
  85         function get_content() {
  86                 $content = $this->elem->getElementsByTagName("content")->item(0);
  87
  88                 if ($content) {
  89                         if ($content->hasAttribute('type')) {
  90                                 if ($content->getAttribute('type') == 'xhtml') {
  91                                         for ($i = 0; $i < $content->childNodes->length; $i++) {
  92                                                 $child = $content->childNodes->item($i);
  93
  94                                                 if ($child->hasChildNodes()) {
  95                                                         return $this->doc->saveXML($child);
  96                                                 }
  97                                         }
  98                                 }
  99                         }
 100
 101                         return $content->nodeValue;
 102                 }
 103         }
 104
 105         function get_description() {
 106                 $content = $this->elem->getElementsByTagName("summary")->item(0);
 107
 108                 if ($content) {
 109                         if ($content->hasAttribute('type')) {
 110                                 if ($content->getAttribute('type') == 'xhtml') {
 111                                         for ($i = 0; $i < $content->childNodes->length; $i++) {
 112                                                 $child = $content->childNodes->item($i);
 113
 114                                                 if ($child->hasChildNodes()) {
 115                                                         return $this->doc->saveXML($child);
 116                                                 }
 117                                         }
 118                                 }
 119                         }
 120
 121                         return $content->nodeValue;
 122                 }
 123
 124         }
 125
 126         function get_categories() {
 127                 $categories = $this->elem->getElementsByTagName("category");
 128                 $cats = array();
 129
 130                 foreach ($categories as $cat) {
 131                         if ($cat->hasAttribute("term"))
 132                                 array_push($cats, $cat->getAttribute("term"));
 133                 }
 134
 135                 $categories = $this->xpath->query("dc:subject", $this->elem);
 136
 137                 foreach ($categories as $cat) {
 138                         array_push($cats, $cat->nodeValue);
 139                 }
 140
 141                 return $cats;
 142         }
 143
 144         function get_enclosures() {
 145                 $links = $this->elem->getElementsByTagName("link");
 146
 147                 $encs = array();
 148
 149                 foreach ($links as $link) {
 150                         if ($link && $link->hasAttribute("href") && $link->hasAttribute("rel")) {
 151                                 if ($link->getAttribute("rel") == "enclosure") {
 152                                         $enc = new FeedEnclosure();
 153
 154                                         $enc->type = $link->getAttribute("type");
 155                                         $enc->link = $link->getAttribute("href");
 156                                         $enc->length = $link->getAttribute("length");
 157
 158                                         array_push($encs, $enc);
 159                                 }
 160                         }
 161                 }
 162
 163                 $enclosures = $this->xpath->query("media:content", $this->elem);
 164
 165                 foreach ($enclosures as $enclosure) {
 166                         $enc = new FeedEnclosure();
 167
 168                         $enc->type = $enclosure->getAttribute("type");
 169                         $enc->link = $enclosure->getAttribute("url");
 170                         $enc->length = $enclosure->getAttribute("length");
 171
 172                         array_push($encs, $enc);
 173                 }
 174
 175                 return $encs;
 176         }
 177
 178 }
 179 ?>