MDL-29695 cohorts: Add pagination and search to cohorts adminstartion…

… page

cohort/index.php

@@ -25,9 +25,12 @@
  */
 
 require('../config.php');
+require($CFG->dirroot.'/cohort/lib.php');
 require_once($CFG->libdir.'/adminlib.php');
 
 $contextid = optional_param('contextid', 0, PARAM_INT);
+$page = optional_param('page', 0, PARAM_INT);
+$searchquery  = optional_param('search', '', PARAM_RAW);
 
 require_login();
 
@@ -68,10 +71,31 @@
 
 echo $OUTPUT->heading(get_string('cohortsin', 'cohort', print_context_name($context)));
 
-$cohorts = $DB->get_records('cohort', array('contextid'=>$context->id));
+// add search form
+$search  = html_writer::start_tag('form', array('id'=>'searchcohortquery', 'method'=>'get'));
+$search .= html_writer::start_tag('div');
+$search .= html_writer::label(get_string('searchcohort', 'cohort').':', 'cohort_search_q');
+$search .= html_writer::empty_tag('input', array('id'=>'cohort_search_q', 'type'=>'text', 'name'=>'search', 'value'=>$searchquery));
+$search .= html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('search', 'cohort')));
+$search .= html_writer::end_tag('div');
+$search .= html_writer::end_tag('form');
+echo $search;
+
+$cohorts = cohort_get_cohorts($context->id, $page, 25, $searchquery);
+
+// output pagination bar
+$params = array('page' => $page);
+if ($contextid) {
+    $params['contextid'] = $contextid;
+}
+if ($search) {
+    $params['search'] = $searchquery;
+}
+$baseurl = new moodle_url('/cohort/index.php', $params);
+echo $OUTPUT->paging_bar($cohorts['totalcohorts'], $page, 25, $baseurl);
 
 $data = array();
-foreach($cohorts as $cohort) {
+foreach($cohorts['cohorts'] as $cohort) {
     $line = array();
     $line[] = format_string($cohort->name);
     $line[] = $cohort->idnumber;
@@ -107,6 +131,7 @@
 $table->width = '80%';
 $table->data  = $data;
 echo html_writer::table($table);
+echo $OUTPUT->paging_bar($cohorts['totalcohorts'], $page, 25, $baseurl);
 
 if ($manager) {
     echo $OUTPUT->single_button(new moodle_url('/cohort/edit.php', array('contextid'=>$context->id)), get_string('add'));

cohort/lib.php

@@ -190,6 +190,51 @@ function cohort_get_visible_list($course) {
     return $cohorts;
 }
 
+/**
+ * Get all the cohorts.
+ *
+ * @global moodle_database $DB
+ * @param int $contextid
+ * @param int $page number of the current page
+ * @param int $perpage items per page
+ * @param string $search search string
+ * @return array    Array(totalcohorts => int, cohorts => array)
+ */
+function cohort_get_cohorts($contextid, $page = 0, $perpage = 25, $search = '') {
+    global $DB;
+
+    $cohorts = array();
+
+    // Add some additional sensible conditions
+    $tests = array('contextid = ?');
+    $params = array($contextid);
+
+    if (!empty($search)) {
+        $conditions = array(
+            'name',
+            'idnumber',
+            'description',
+        );
+        $searchparam = '%' . $search . '%';
+        foreach ($conditions as $key=>$condition) {
+            $conditions[$key] = $DB->sql_like($condition,"?", false);
+            $params[] = $searchparam;
+        }
+        $tests[] = '(' . implode(' OR ', $conditions) . ')';
+    }
+    $wherecondition = implode(' AND ', $tests);
+
+    $fields = 'SELECT *';
+    $countfields = 'SELECT COUNT(1)';
+    $sql = " FROM {cohort}
+             WHERE $wherecondition";
+    $order = ' ORDER BY name ASC';
+    $totalcohorts = $DB->count_records_sql($countfields . $sql, $params);
+    $cohorts = $DB->get_records_sql($fields . $sql . $order, $params, $page*$perpage, $perpage);
+
+    return array('totalcohorts' => $totalcohorts, 'cohorts' => $cohorts);
+}
+
 /**
  * Cohort assignment candidates
  */

lang/en/cohort.php

@@ -56,3 +56,5 @@
 $string['selectfromcohort'] = 'Select members from cohort';
 $string['unknowncohort'] = 'Unknown cohort ({$a})!';
 $string['useradded'] = 'User added to cohort "{$a}"';
+$string['search'] = 'Search';
+$string['searchcohort'] = 'Search cohort';