From 1f2842f2063d220360a3eda981395304eb2af877 Mon Sep 17 00:00:00 2001
From: Antonio Carlos Mariani <a.c.mariani@inf.ufsc.br>
Date: Sun, 23 Aug 2015 00:23:48 -0300
Subject: [PATCH] Fixes #143 Include action to delete all hidden sections

---
 lang/en/attendance.php |  7 +++++++
 locallib.php           | 19 +++++++++++++++++++
 renderer.php           | 10 ++++++++++
 sessions.php           | 23 +++++++++++++++++++++++
 4 files changed, 59 insertions(+)

diff --git a/lang/en/attendance.php b/lang/en/attendance.php
index 9299464..4375926 100644
--- a/lang/en/attendance.php
+++ b/lang/en/attendance.php
@@ -301,3 +301,10 @@ $string['lowgrade'] = 'Low grade';
 $string['submitattendance'] = 'Submit attendance';
 $string['attendancenotset'] = 'You must set your attendance';
 $string['export'] = 'Export';
+$string['points'] = 'Points';
+$string['unknowngroup'] = 'Unknown group';
+$string['notmember'] = 'not&nbsp;member';
+
+$string['deletehiddensessions'] = 'Delete all hidden sessions';
+$string['confirmdeletehiddensessions'] = 'Are you sure you want to delete {$a->count} sessions scheduled before the course start date ({$a->date})?';
+$string['hiddensessionsdeleted'] = 'All hidden sessions were delete';
diff --git a/locallib.php b/locallib.php
index 44291b8..5bcdb49 100644
--- a/locallib.php
+++ b/locallib.php
@@ -276,6 +276,7 @@ class att_sessions_page_params {
     const ACTION_DELETE           = 3;
     const ACTION_DELETE_SELECTED  = 4;
     const ACTION_CHANGE_DURATION  = 5;
+    const ACTION_DELETE_HIDDEN    = 6;
 
     /** @var int view mode of taking attendance page*/
     public $action;
@@ -573,6 +574,24 @@ class attendance {
         return $DB->count_records_select('attendance_sessions', $where, $params);
     }
 
+    /**
+     * Returns the hidden sessions for this attendance
+     *
+     * Fetches data from {attendance_sessions}
+     *
+     * @return hidden sessions
+     */
+    public function get_hidden_sessions() {
+        global $DB;
+
+        $where = "attendanceid = :aid AND sessdate < :csdate";
+        $params = array(
+                'aid'   => $this->id,
+                'csdate'=> $this->course->startdate);
+
+        return $DB->get_records_select('attendance_sessions', $where, $params);
+    }
+
     public function get_filtered_sessions() {
         global $DB;
 
diff --git a/renderer.php b/renderer.php
index 36134cf..9e34dad 100644
--- a/renderer.php
+++ b/renderer.php
@@ -283,6 +283,8 @@ class mod_attendance_renderer extends plugin_renderer_base {
     }
 
     protected function render_sess_manage_control(attendance_manage_data $sessdata) {
+        global $OUTPUT;
+
         $table = new html_table();
         $table->attributes['class'] = ' ';
         $table->width = '100%';
@@ -292,6 +294,14 @@ class mod_attendance_renderer extends plugin_renderer_base {
                 get_string('hiddensessions', 'attendance').': '.$sessdata->hiddensessionscount);
 
         if (has_capability('mod/attendance:manageattendances', $sessdata->att->context)) {
+            if ($sessdata->hiddensessionscount > 0) {
+                $attributes = array(
+                        'type'  => 'submit',
+                        'name'  => 'deletehiddensessions',
+                        'value' => get_string('deletehiddensessions', 'attendance'));
+                $table->data[1][] = html_writer::empty_tag('input', $attributes);
+            }
+
             $options = array(
                         att_sessions_page_params::ACTION_DELETE_SELECTED => get_string('delete'),
                         att_sessions_page_params::ACTION_CHANGE_DURATION => get_string('changeduration', 'attendance'));
diff --git a/sessions.php b/sessions.php
index 3aa8e8c..2aac736 100644
--- a/sessions.php
+++ b/sessions.php
@@ -33,6 +33,10 @@ $pageparams = new att_sessions_page_params();
 $id                     = required_param('id', PARAM_INT);
 $pageparams->action     = required_param('action', PARAM_INT);
 
+if (optional_param('deletehiddensessions', false, PARAM_TEXT)) {
+    $pageparams->action = att_sessions_page_params::ACTION_DELETE_HIDDEN;
+}
+
 if (empty($pageparams->action)) {
     // The form on manage.php can submit with the "choose" option - this should be fixed in the long term,
     // but in the meantime show a useful error and redirect when it occurs.
@@ -175,6 +179,25 @@ switch ($att->pageparams->action) {
         }
 
         break;
+    case att_sessions_page_params::ACTION_DELETE_HIDDEN:
+        $confirm  = optional_param('confirm', null, PARAM_INT);
+        if ($confirm && confirm_sesskey()) {
+            $sessions = $att->get_hidden_sessions();
+            $att->delete_sessions(array_keys($sessions));
+            redirect($att->url_manage(), get_string('hiddensessionsdeleted', 'attendance'));
+        }
+
+        $a = new stdClass();
+        $a->count = $att->get_hidden_sessions_count();
+        $a->date = userdate($course->startdate);
+        $message = get_string('confirmdeletehiddensessions', 'attendance', $a);
+
+        $params = array('action' => $att->pageparams->action, 'confirm' => 1, 'sesskey' => sesskey());
+        echo $OUTPUT->header();
+        echo $OUTPUT->heading(get_string('attendanceforthecourse', 'attendance').' :: ' .format_string($course->fullname));
+        echo $OUTPUT->confirm($message, $att->url_sessions($params), $att->url_manage());
+        echo $OUTPUT->footer();
+        exit;
 }
 
 $output = $PAGE->get_renderer('mod_attendance');