[svn r17952] search: initial version of callback script

it'll be used to obtain terms on prefilter form type for search widget

main/inc/lib/search/get_terms.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * @file
+ * This script retrieves a list of terms that have xapian documents
+ * related with the term passed
+ */
+$items = array();
+
+// verify parameter and return a right value to avoid problems parsing it
+if (empty($_GET['term']) || empty($_GET['prefix']) || !in_array($_GET['operator'], array('or', 'and'))) {
+    echo json_encode($array);
+    return;
+}
+
+$term = $_GET['term'];
+$prefix = $_GET['prefix'];
+$operator = $_GET['operator'];
+
+require_once dirname(__FILE__) . '../../../global.inc.php';
+require_once api_get_path(LIBRARY_PATH).'/search/DokeosQuery.php';
+//TODO: manage Any/All
+$term_filter = dokeos_get_boolean_query($prefix . $term);
+$dkterms = dokeos_query_simple_query('', 0, 1000, array($term_filter));
+if (is_array($dkterms) && is_array($dkterms[1])) {
+    $specific_fields = get_specific_field_list();
+    $sf_terms = array();
+    // build base array avoding repeated terms
+    foreach ($specific_fields as $specific_field) {
+        foreach($dkterms[1] as $obj) {
+            foreach ($obj['sf-'.$specific_field['code']] as $raw_term) {
+                if (count($raw_term) > 1) {
+                    $normal_term = substr($raw_term['name'], 1);
+                    $sf_terms[$specific_field['code']][$normal_term] = $normal_term;
+                }
+            }
+        }
+    }
+    // build array to return
+    foreach ($sf_terms as $prefix => $term_group) {
+        $first_term = array('__all__' => ($operator=='or'? '-- Any --': '-- All -- '));
+        $terms_list[] = array(
+            'prefix' => $prefix,
+            'terms' => array_merge($first_term, $term_group),
+        );
+    }
+}
+
+echo json_encode($terms_list);