<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Block for displayed logged in user's course completion status
 *
 * @package    block
 * @subpackage completion
 * @copyright  2009 Catalyst IT Ltd
 * @author     Aaron Barnes <aaronb@catalyst.net.nz>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once('../../config.php');
require_once($CFG->libdir.'/completionlib.php');


// TODO:  Make this page Moodle 2.0 compliant


///
/// Load data
///
$id = required_param('course', PARAM_INT);
// User id
$userid = optional_param('user', 0, PARAM_INT);

// Load course
$course = $DB->get_record('course', array('id' => $id));

// Load user
if ($userid) {
    $user = $DB->get_record('user', array('id' => $userid), '*', MUST_EXIST);
} else {
    $user = $USER;
}


// Check permissions
require_login($course);

$coursecontext   = get_context_instance(CONTEXT_COURSE, $course->id);
$personalcontext = get_context_instance(CONTEXT_USER, $user->id);

$can_view = false;

// Can view own report
if ($USER->id == $user->id) {
    $can_view = true;
} else if (has_capability('moodle/user:viewuseractivitiesreport', $personalcontext)) {
    $can_view = true;
} else if (has_capability('report/completion:view', $coursecontext)) {
    $can_view = true;
} else if (has_capability('report/completion:view', $personalcontext)) {
    $can_view = true;
}

if (!$can_view) {
    print_error('cannotviewreport');
}


// Load completion data
$info = new completion_info($course);

$returnurl = "{$CFG->wwwroot}/course/view.php?id={$id}";

// Don't display if completion isn't enabled!
if (!$info->is_enabled()) {
    print_error('completionnotenabled', 'completion', $returnurl);
}

// Load criteria to display
$completions = $info->get_completions($user->id);

// Check if this course has any criteria
if (empty($completions)) {
    print_error('nocriteriaset', 'completion', $returnurl);
}

// Check this user is enroled
if (!$info->is_tracked_user($user->id)) {
    if ($USER->id == $user->id) {
        print_error('notenroled', 'completion', $returnurl);
    } else {
        print_error('usernotenroled', 'completion', $returnurl);
    }
}


///
/// Display page
///

// Print header
$page = get_string('completionprogressdetails', 'block_completionstatus');
$title = format_string($course->fullname) . ': ' . $page;

$PAGE->navbar->add($page);
$PAGE->set_pagelayout('standard');
$PAGE->set_url('/blocks/completionstatus/details.php', array('course' => $course->id));
$PAGE->set_title(get_string('course') . ': ' . $course->fullname);
$PAGE->set_heading($title);
echo $OUTPUT->header();


// Display completion status
echo '<table class="generalbox boxaligncenter"><tbody>';

// If not display logged in user, show user name
if ($USER->id != $user->id) {
    echo '<tr><td colspan="2"><b>'.get_string('showinguser', 'completion').'</b>: ';
    echo '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&course='.$course->id.'">'.fullname($user).'</a>';
    echo '</td></tr>';
}

echo '<tr><td colspan="2"><b>'.get_string('status').':</b> ';

// Is course complete?
$coursecomplete = $info->is_course_complete($user->id);

// Has this user completed any criteria?
$criteriacomplete = $info->count_course_user_data($user->id);

if ($coursecomplete) {
    echo get_string('complete');
} else if (!$criteriacomplete) {
    echo '<i>'.get_string('notyetstarted', 'completion').'</i>';
} else {
    echo '<i>'.get_string('inprogress','completion').'</i>';
}

echo '</td></tr>';
echo '<tr><td colspan="2"><b>'.get_string('required').':</b> ';

// Get overall aggregation method
$overall = $info->get_aggregation_method();

if ($overall == COMPLETION_AGGREGATION_ALL) {
    echo get_string('criteriarequiredall', 'completion');
} else {
    echo get_string('criteriarequiredany', 'completion');
}

echo '</td></tr></tbody></table>';

// Generate markup for criteria statuses
echo '<table class="generalbox boxaligncenter" cellpadding="3"><tbody>';
echo '<tr class="ccheader">';
echo '<th class="c0 header" scope="col">'.get_string('criteriagroup', 'block_completionstatus').'</th>';
echo '<th class="c1 header" scope="col">'.get_string('criteria', 'completion').'</th>';
echo '<th class="c2 header" scope="col">'.get_string('requirement', 'block_completionstatus').'</th>';
echo '<th class="c3 header" scope="col">'.get_string('status').'</th>';
echo '<th class="c4 header" scope="col">'.get_string('complete').'</th>';
echo '<th class="c5 header" scope="col">'.get_string('completiondate', 'report_completion').'</th>';
echo '</tr>';

// Save row data
$rows = array();

global $COMPLETION_CRITERIA_TYPES;

// Loop through course criteria
foreach ($completions as $completion) {
    $criteria = $completion->get_criteria();
    $complete = $completion->is_complete();

    $row = array();
    $row['type'] = $criteria->criteriatype;
    $row['title'] = $criteria->get_title();
    $row['status'] = $completion->get_status();
    $row['timecompleted'] = $completion->timecompleted;
    $row['details'] = $criteria->get_details($completion);
    $rows[] = $row;
}

// Print table
$last_type = '';
$agg_type = false;

foreach ($rows as $row) {

    // Criteria group
    echo '<td class="c0">';
    if ($last_type !== $row['details']['type']) {
        $last_type = $row['details']['type'];
        echo $last_type;

        // Reset agg type
        $agg_type = true;
    } else {
        // Display aggregation type
        if ($agg_type) {
            $agg = $info->get_aggregation_method($row['type']);

            echo '(<i>';

            if ($agg == COMPLETION_AGGREGATION_ALL) {
                echo strtolower(get_string('all', 'completion'));
            } else {
                echo strtolower(get_string('any', 'completion'));
            }

            echo '</i> '.strtolower(get_string('required')).')';
            $agg_type = false;
        }
    }
    echo '</td>';

    // Criteria title
    echo '<td class="c1">';
    echo $row['details']['criteria'];
    echo '</td>';

    // Requirement
    echo '<td class="c2">';
    echo $row['details']['requirement'];
    echo '</td>';

    // Status
    echo '<td class="c3">';
    echo $row['details']['status'];
    echo '</td>';

    // Is complete
    echo '<td class="c4">';
    echo ($row['status'] === get_string('yes')) ? get_string('yes') : get_string('no');
    echo '</td>';

    // Completion data
    echo '<td class="c5">';
    if ($row['timecompleted']) {
        echo userdate($row['timecompleted'], '%e %B %G');
    } else {
        echo '-';
    }
    echo '</td>';
    echo '</tr>';
}

echo '</tbody></table>';

echo $OUTPUT->footer();
