ArticleSearchDAO.inc.php

<?php
 
import('classes.search.ArticleSearch');
import('lib.pkp.classes.search.SubmissionSearchDAO');
 
class ArticleSearchDAO extends SubmissionSearchDAO {
   function getPhraseResults($journal, $phrase, $publishedFrom = null, $publishedTo = null, $type = null, $limit = 500, $cacheHours = 24) {
      import('lib.pkp.classes.db.DBRowIterator');
      if (empty($phrase)) {
         $results = false;
         return new DBRowIterator($results);
      }
 
      $sqlFrom = '';
      $sqlWhere = '';
      $params = array();
 
      for ($i = 0, $count = count($phrase); $i < $count; $i++) {
         if (!empty($sqlFrom)) {
            $sqlFrom .= ', ';
            $sqlWhere .= ' AND ';
         }
         $sqlFrom .= 'submission_search_object_keywords o'.$i.' NATURAL JOIN submission_search_keyword_list k'.$i;
         if (strstr($phrase[$i], '%') === false) $sqlWhere .= 'k'.$i.'.keyword_text = ?';
         else $sqlWhere .= 'k'.$i.'.keyword_text LIKE ?';
         if ($i > 0) $sqlWhere .= ' AND o0.object_id = o'.$i.'.object_id AND o0.pos+'.$i.' = o'.$i.'.pos';
 
         $params[] = $phrase[$i];
      }
 
      if (!empty($type)) {
         $sqlWhere .= ' AND (o.type & ?) != 0';
         $params[] = $type;
      }
 
      if (!empty($publishedFrom)) {
         $sqlWhere .= ' AND p.date_published >= ' . $this->datetimeToDB($publishedFrom);
      }
 
      if (!empty($publishedTo)) {
         $sqlWhere .= ' AND p.date_published <= ' . $this->datetimeToDB($publishedTo);
      }
 
      if (!empty($journal)) {
         $sqlWhere .= ' AND s.context_id = ?';
         $params[] = $journal->getId();
      }
 
      import('lib.pkp.classes.submission.PKPSubmission'); // STATUS_PUBLISHED
      $result = $this->retrieveCached(
         'SELECT
            o.submission_id,
            MAX(s.context_id) AS journal_id,
            MAX(p.date_published) AS s_pub,
            COUNT(*) AS count
         FROM
            submissions s
            JOIN publications p ON (p.publication_id = s.current_publication_id),
            submission_search_objects o NATURAL JOIN ' . $sqlFrom . '
         WHERE
            s.submission_id = o.submission_id AND
            s.status = ' . STATUS_PUBLISHED . ' AND
            ' . $sqlWhere . '
         GROUP BY o.submission_id
         ORDER BY count DESC
         LIMIT ' . $limit,
         $params,
         3600 * $cacheHours // Cache for 24 hours
      );
 
      $returner = array();
      while (!$result->EOF) {
         $row = $result->getRowAssoc(false);
         $returner[$row['submission_id']] = array(
            'count' => $row['count'],
            'journal_id' => $row['journal_id'],
            'publicationDate' => $this->datetimeFromDB($row['s_pub'])
         );
         $result->MoveNext();
      }
      $result->Close();
 
      return $returner;
   }
}