<?php

require_once('../config.php');
require_once('lib.php');

// retrieve parameters
$noteid = required_param('id', PARAM_INT);

$PAGE->set_url('/notes/delete.php', array('id'=>$noteid));

// locate note information
if (!$note = note_load($noteid)) {
    print_error('invalidid');
}

// locate course information
if (!$course = $DB->get_record('course', array('id'=>$note->courseid))) {
    print_error('invalidcourseid');
}

// locate user information
    if (!$user = $DB->get_record('user', array('id'=>$note->userid))) {
        print_error('invaliduserid');
    }

// require login to access notes
require_login($course);

// locate context information
$context = get_context_instance(CONTEXT_COURSE, $course->id);

// check capability
if (!has_capability('moodle/notes:manage', $context)) {
    print_error('nopermissiontodelete', 'notes');
}

if (empty($CFG->enablenotes)) {
    print_error('notesdisabled', 'notes');
}

if (data_submitted() && confirm_sesskey()) {
//if data was submitted and is valid, then delete note
    $returnurl = $CFG->wwwroot . '/notes/index.php?course=' . $course->id . '&amp;user=' . $note->userid;
    if (note_delete($noteid)) {
        add_to_log($note->courseid, 'notes', 'delete', 'index.php?course='.$note->courseid.'&amp;user='.$note->userid . '#note-' . $note->id , 'delete note');
    } else {
        print_error('cannotdeletepost', 'notes', $returnurl);
    }
    redirect($returnurl);

} else {
// if data was not submitted yet, then show note data with a delete confirmation form
    $strnotes = get_string('notes', 'notes');
    $optionsyes = array('id'=>$noteid, 'sesskey'=>sesskey());
    $optionsno  = array('course'=>$course->id, 'user'=>$note->userid);

// output HTML
    $link = null;
    if (has_capability('moodle/course:viewparticipants', $context) || has_capability('moodle/site:viewparticipants', get_context_instance(CONTEXT_SYSTEM))) {
        $link = new moodle_url('/user/index.php',array('id'=>$course->id));
    }
    $PAGE->navbar->add(get_string('participants'), $link);
    $PAGE->navbar->add(fullname($user), new moodle_url('/user/view.php', array('id'=>$user->id,'course'=>$course->id)));
    $PAGE->navbar->add(get_string('notes', 'notes'), new moodle_url('/notes/index.php', array('user'=>$user->id,'course'=>$course->id)));
    $PAGE->navbar->add(get_string('delete'));
    $PAGE->set_title($course->shortname . ': ' . $strnotes);
    $PAGE->set_heading($course->fullname);
    echo $OUTPUT->header();
    echo $OUTPUT->confirm(get_string('deleteconfirm', 'notes'), new moodle_url('delete.php',$optionsyes),  new moodle_url('index.php',$optionsno));
    echo '<br />';
    note_print($note, NOTES_SHOW_BODY | NOTES_SHOW_HEAD);
    echo $OUTPUT->footer();
}