<?php

    /**
     * print the single entries
     *
     * @author Andreas Grabs
     * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
     * @package feedback
     */

    require_once("../../config.php");
    require_once("lib.php");
    require_once($CFG->libdir.'/tablelib.php');

    ////////////////////////////////////////////////////////
    //get the params
    ////////////////////////////////////////////////////////
    $id = required_param('id', PARAM_INT);
    $subject = optional_param('subject','',PARAM_CLEANHTML);
    $message = optional_param('message','',PARAM_CLEANHTML);
    $format = optional_param('format',FORMAT_MOODLE,PARAM_INT);
    $messageuser = optional_param('messageuser', false, PARAM_INT);
    $action = optional_param('action', '',PARAM_ALPHA);
    $perpage = optional_param('perpage', FEEDBACK_DEFAULT_PAGE_COUNT, PARAM_INT);  // how many per page
    $showall = optional_param('showall', false, PARAM_INT);  // should we show all users
    // $SESSION->feedback->current_tab = $do_show;
    $current_tab = 'nonrespondents';

    ////////////////////////////////////////////////////////
    //get the objects
    ////////////////////////////////////////////////////////
    if (! $cm = get_coursemodule_from_id('feedback', $id)) {
        print_error('invalidcoursemodule');
    }

    if (! $course = $DB->get_record("course", array("id"=>$cm->course))) {
        print_error('coursemisconf');
    }

    if (! $feedback = $DB->get_record("feedback", array("id"=>$cm->instance))) {
        print_error('invalidcoursemodule');
    }

    //this page only can be shown on nonanonymous feedbacks in courses
    //we should never reach this page
    if($feedback->anonymous != FEEDBACK_ANONYMOUS_NO OR $feedback->course == SITEID) {
        print_error('error');
    }

    $url = new moodle_url('/mod/feedback/show_nonrespondents.php', array('id'=>$cm->id));

    $PAGE->set_url($url);

    if (!$context = get_context_instance(CONTEXT_MODULE, $cm->id)) {
            print_error('badcontext');
    }

    //we need the coursecontext to allow sending of mass mails
    if (!$coursecontext = get_context_instance(CONTEXT_COURSE, $course->id)) {
            print_error('badcontext');
    }

    require_login($course->id, true, $cm);

    if(($formdata = data_submitted()) AND !confirm_sesskey()) {
        print_error('invalidsesskey');
    }

    require_capability('mod/feedback:viewreports', $context);

    if($action == 'sendmessage' AND has_capability('moodle/course:bulkmessaging', $coursecontext)) {
        $shortname = format_string($course->shortname,
                                true,
                                array('context' => $coursecontext));
        $strfeedbacks = get_string("modulenameplural", "feedback");

        $htmlmessage = "<body id=\"email\">";

        $link1 = $CFG->wwwroot.'/course/view.php?id='.$course->id;
        $link2 = $CFG->wwwroot.'/mod/feedback/index.php?id='.$course->id;
        $link3 = $CFG->wwwroot.'/mod/feedback/view.php?id='.$cm->id;

        $htmlmessage .= '<div class="navbar">'.
        '<a target="_blank" href="'.$link1.'">'.$shortname.'</a> &raquo; '.
        '<a target="_blank" href="'.$link2.'">'.$strfeedbacks.'</a> &raquo; '.
        '<a target="_blank" href="'.$link3.'">'.format_string($feedback->name, true).'</a>'.
        '</div>';

        $htmlmessage .= $message;
        $htmlmessage .= '</body>';

        $good = 1;
        if (is_array($messageuser)) {
            foreach ($messageuser as $userid) {
                $senduser = $DB->get_record('user', array('id'=>$userid));
                $eventdata = new stdClass();
                $eventdata->name             = 'message';
                $eventdata->component        = 'mod_feedback';
                $eventdata->userfrom         = $USER;
                $eventdata->userto           = $senduser;
                $eventdata->subject          = $subject;
                $eventdata->fullmessage      = html_to_text($htmlmessage);
                $eventdata->fullmessageformat = FORMAT_PLAIN;
                $eventdata->fullmessagehtml  = $htmlmessage;
                $eventdata->smallmessage     = '';
                $good = $good && message_send($eventdata);
            }
            if (!empty($good)) {
                $msg = $OUTPUT->heading(get_string('messagedselectedusers'));
            } else {
                $msg = $OUTPUT->heading(get_string('messagedselectedusersfailed'));
            }
            redirect($url, $msg, 4);
            exit;
        }
    }

    ////////////////////////////////////////////////////////
    //get the responses of given user
    ////////////////////////////////////////////////////////

    /// Print the page header
    $PAGE->navbar->add(get_string('show_nonrespondents','feedback'));
    $PAGE->set_heading(format_string($course->fullname));
    $PAGE->set_title(format_string($feedback->name));
    echo $OUTPUT->header();

    include('tabs.php');

    /// Print the main part of the page
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////

    ////////////////////////////////////////////////////////
    /// Print the users with no responses
    ////////////////////////////////////////////////////////
    //get the effective groupmode of this course and module
    if (isset($cm->groupmode) && empty($course->groupmodeforce)) {
        $groupmode =  $cm->groupmode;
    } else {
        $groupmode = $course->groupmode;
    }

    $groupselect = groups_print_activity_menu($cm, $url->out(), true);
    $mygroupid = groups_get_activity_group($cm);

    // preparing the table for output
    $baseurl = new moodle_url('/mod/feedback/show_nonrespondents.php');
    $baseurl->params(array('id'=>$id, 'showall'=>$showall));

    $tablecolumns = array('userpic', 'fullname', 'status');
    $tableheaders = array(get_string('userpic'), get_string('fullnameuser'), get_string('status'));

    if(has_capability('moodle/course:bulkmessaging', $coursecontext)) {
        $tablecolumns[] = 'select';
        $tableheaders[] = get_string('select');
    }

    $table = new flexible_table('feedback-shownonrespondents-'.$course->id);

    $table->define_columns($tablecolumns);
    $table->define_headers($tableheaders);
    $table->define_baseurl($baseurl);

    $table->sortable(true, 'lastname', SORT_DESC);
    $table->set_attribute('cellspacing', '0');
    $table->set_attribute('id', 'showentrytable');
    $table->set_attribute('class', 'generaltable generalbox');
    $table->set_control_variables(array(
                TABLE_VAR_SORT    => 'ssort',
                TABLE_VAR_IFIRST  => 'sifirst',
                TABLE_VAR_ILAST   => 'silast',
                TABLE_VAR_PAGE    => 'spage'
                ));

    $table->no_sorting('select');
    $table->no_sorting('status');

    $table->setup();

    if($table->get_sql_sort()) {
        $sort = $table->get_sql_sort();
    }else {
        $sort = '';
    }

    //get students in conjunction with groupmode
    if($groupmode > 0) {
        if($mygroupid > 0) {
            $usedgroupid = $mygroupid;
        } else {
            $usedgroupid = false;
        }
    }else {
        $usedgroupid = false;
    }

    $matchcount = feedback_count_incomplete_users($cm, $usedgroupid);
    $table->initialbars(false);

    if($showall) {
        $startpage = false;
        $pagecount = false;
    }else {
        $table->pagesize($perpage, $matchcount);
        $startpage = $table->get_page_start();
        $pagecount = $table->get_page_size();
    }

    $students = feedback_get_incomplete_users($cm, $usedgroupid, $sort, $startpage, $pagecount);
    //####### viewreports-start
    //print the list of students
    echo $OUTPUT->box_start('generalbox boxaligncenter boxwidthwide');
    echo isset($groupselect) ? $groupselect : '';
    echo '<div class="clearer"></div>';
    echo $OUTPUT->box_start('mdl-align');
    // echo '<table><tr><td width="400">';
    if (!$students) {
        echo $OUTPUT->notification(get_string('noexistingparticipants', 'enrol'));
    } else{
        echo print_string('non_respondents_students', 'feedback');
        echo ' ('.$matchcount.')<hr />';

        if(has_capability('moodle/course:bulkmessaging', $coursecontext)) {
            echo '<form class="mform" action="show_nonrespondents.php" method="post" id="feedback_sendmessageform">';
        }
        foreach ($students as $student){
            $user = $DB->get_record('user', array('id'=>$student));
            //userpicture and link to the profilepage
            $profilelink = '<strong><a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$course->id.'">'.fullname($user).'</a></strong>';
            $data = array ($OUTPUT->user_picture($user, array('courseid'=>$course->id)), $profilelink);

            if($DB->record_exists('feedback_completedtmp', array('userid'=>$user->id))) {
                $data[] = get_string('started', 'feedback');
            }else {
                $data[] = get_string('not_started', 'feedback');
            }

            //selections to bulk messaging
            if(has_capability('moodle/course:bulkmessaging', $coursecontext)) {
                $data[] = '<input type="checkbox" class="usercheckbox" name="messageuser[]" value="'.$user->id.'" />';
            }
            $table->add_data($data);
        }
        $table->print_html();

        $allurl = new moodle_url($baseurl);

        if ($showall) {
            $allurl->param('showall', 0);
            echo $OUTPUT->container(html_writer::link($allurl, get_string('showperpage', '', FEEDBACK_DEFAULT_PAGE_COUNT)), array(), 'showall');
        } else if ($matchcount > 0 && $perpage < $matchcount) {
            $allurl->param('showall', 1);
            echo $OUTPUT->container(html_writer::link($allurl, get_string('showall', '', $matchcount)), array(), 'showall');
        }
        if(has_capability('moodle/course:bulkmessaging', $coursecontext)) {
            $usehtmleditor = can_use_html_editor();
            echo '<div class="buttons"><br />';
            echo '<input type="button" id="checkall" value="'.get_string('selectall').'" /> ';
            echo '<input type="button" id="checknone" value="'.get_string('deselectall').'" /> ';
            echo '</div>';
            echo '<fieldset class="clearfix">';
            echo '<legend class="ftoggler">'.get_string('send_message', 'feedback').'</legend>';
            echo '<div><label for="feedback_subject">'.get_string('subject', 'feedback').'&nbsp;</label><input type="text" id="feedback_subject" size="50" maxlength="255" name="subject" value="'.$subject.'" /></div>';
            print_textarea($usehtmleditor, 15, 25, 30, 10, "message", $message);
            if ($usehtmleditor) {
                print_string('formathtml');
                echo '<input type="hidden" name="format" value="'.FORMAT_HTML.'" />';
            } else {
                choose_from_menu(format_text_menu(), "format", $format, "");
            }
            echo '<br /><div class="buttons">';
            echo '<input type="submit" name="send_message" value="'.get_string('send', 'feedback').'" />';
            echo '</div>';
            echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
            echo '<input type="hidden" name="action" value="sendmessage" />';
            echo '<input type="hidden" name="id" value="'.$id.'" />';
            echo '</fieldset>';
            echo '</form>';
            //include the needed js
            $module = array('name'=>'mod_feedback', 'fullpath'=>'/mod/feedback/feedback.js');
            $PAGE->requires->js_init_call('M.mod_feedback.init_sendmessage', null, false, $module);
        }
    }
    echo $OUTPUT->box_end();
    echo $OUTPUT->box_end();

    /// Finish the page
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////

    echo $OUTPUT->footer();

