improves google scholar metadata

bibtexbrowser.php

@@ -1558,8 +1558,16 @@ class BibEntry {
     $s.=$this->getText();
     return $s;
   }
+  
+  /** returns the first and last page of the entry as an array ([0]->first,  [2]->last) */
+  function getPages() {
+    preg_match('/([0-9]+).*?([0-9]+)/',$this->getField('pages'),$matches);
+    array_shift($matches);
+    return $matches;
   }
 
+} // enc class BibEntry
+
 /** returns an HTML tag depending on BIBTEXBROWSER_LAYOUT e.g. <TABLE> */
 function get_HTML_tag_for_layout() {
   switch(BIBTEXBROWSER_LAYOUT) { /* switch for different layouts */
@@ -2658,8 +2666,22 @@ class BibEntryDisplay {
     return $this->bib->toCoins().$this->bib->toEntryUnformatted();
   }
 
-  /** Creates metadata for Google Scholar
+  /** Returns a dictionary of metadata. If the same metadata appears multiple times, it is concatenated with ";"
-   * + a description
+   */
+  function metadata_dict() {
+    $result = array();
+    foreach($this->metadata() as $v) {
+      if (!in_array($v[0], $result)) {      
+        $result[$v[0]] = $v[1];
+      } else {
+        $result[$v[0]] .= ';'.$v[1];
+      }
+    }
+    return $result;
+  }
+  
+  /** Returns an array containing the metadata for Google Scholar
+   *    array (array('citation_title', 'foo'), ....)
    * @see http://scholar.google.com/intl/en/scholar/inclusion.html
    * @see http://www.monperrus.net/martin/accurate+bibliographic+metadata+and+google+scholar
    * */
@@ -2676,10 +2698,11 @@ class BibEntryDisplay {
       foreach($authors as $author) {
         $result[] = array('citation_author',$author);
       }
-    $result[] = array('citation_publication_date',$this->bib->getYear());
       
-    // this page
+      // the date 
-    $result[] = array('citation_abstract_html_url','http://'.$_SERVER['HTTP_HOST'].($_SERVER['SERVER_PORT']=='80'?'':$_SERVER['SERVER_PORT']).str_replace('&','&amp;',$_SERVER['REQUEST_URI']));
+      $result[] = array('citation_publication_date',$this->bib->getYear());
+      $result[] = array('citation_date',$this->bib->getYear());
+        $result[] = array('citation_year',$this->bib->getYear());
 
       if ($this->bib->hasField("publisher")) {
         $result[] = array('citation_publisher',$this->bib->getPublisher());
@@ -2689,6 +2712,10 @@ class BibEntryDisplay {
       if ($this->bib->getType()=="article") { // journal article
         $result[] = array('citation_journal_title',$this->bib->getField("journal"));
         $result[] = array('citation_volume',$this->bib->getField("volume"));
+        if ($this->bib->hasField("number")) {
+          // in bibtex, the issue number is usually in a field "number"
+          $result[] = array('citation_issue',$this->bib->getField("number"));
+        }
         if ($this->bib->hasField("issue")) {
           $result[] = array('citation_issue',$this->bib->getField("issue"));
         }
@@ -2732,8 +2759,14 @@ class BibEntryDisplay {
       if ($this->bib->hasField("url")) {
         $result[] = array('citation_pdf_url',$this->bib->getField("url"));
       }    
+      
+      if ($this->bib->hasField("pages")) {
+        $pages = $this->bib->getPages();
+        $result[] = array('citation_firstpage',$pages[0]);
+        $result[] = array('citation_lastpage',$pages[1]);
       }
 
+    } // end Google Scholar
 
     // we don't introduce yet another kind of bibliographic metadata
     // the core bibtex metadata will simply be available as json
@@ -2830,6 +2863,7 @@ class BibEntryDisplay {
   }
 }
 
+
 // ----------------------------------------------------------------------
 // DATABASE MANAGEMENT
 // ----------------------------------------------------------------------