Proyectos de Subversion Moodle

<?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/>.

/**

 * This block allows the user to give the course a rating, which

 * is displayed in a custom table (<prefix>_block_rate_course).

 *

 * @package    block

 * @subpackage rate_course

 * @copyright  2009 Jenny Gray

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 *

 * Code was Rewritten for Moodle 2.X By Atar + Plus LTD for Comverse LTD.

 * @copyright © 2011 Comverse LTD.

 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License

 */

class block_rate_course extends block_list

{

    public function init() {

        $this->title = get_string('courserating', 'block_rate_course');

    }

    public function applicable_formats() {

        return array('all' => true, 'mod' => false, 'tag' => false, 'my' => false);

    }

    public function has_config() {

        return true; // Config only for review part.

    }

    public function get_content() {

        global $CFG, $COURSE, $USER, $DB, $OUTPUT, $PAGE;

        if ($this->content !== null) {

            return $this->content;

        }

        $this->content = new stdClass;

        $this->content->items = array();

        $this->content->icons = array();

        if (substr($PAGE->pagetype, 0, 11) == 'course-view') {

            $qmod = $DB->get_record('modules', array('name'=>'questionnaire'));

            if ($qmod && ($qmod->visible=='1') && !empty($CFG->block_rate_course_quest)) {

                // Get the Give a Review instance id.

                $questionnaire = $DB->get_record_sql(

                                "SELECT id,sid FROM {questionnaire} WHERE name = ? AND course = ?",

                                array($CFG->block_rate_course_quest, $COURSE->id));

                if ($questionnaire) {

                    $url = new moodle_url('/mod/questionnaire/report.php',

                                    array('instance'=>$questionnaire->id, 'sid'=>$questionnaire->sid));

                    $this->content->items[] = $OUTPUT->action_link($url, get_string('viewreview', 'block_rate_course'));

                    $this->content->icons[] = $OUTPUT->pix_icon('review', get_string('viewreview', 'block_rate_course'),

                                    'block_rate_course', array('class'=>'icon'));

                }

            }

            $this->content->icons[] = $OUTPUT->pix_icon('star', get_string('giverating', 'block_rate_course'),

                            'block_rate_course', array('class'=>'icon'));

            $url = new moodle_url('/blocks/rate_course/rate.php', array('courseid'=>$COURSE->id));

            $this->content->items[] = $OUTPUT->action_link($url, get_string('giverating', 'block_rate_course'));

            $this->content->items[] = '';

            $this->content->icons[] = $OUTPUT->pix_icon('spacer', '');

            // Output current rating.

            $this->content->footer = '<div class="centered">'.

                            $this->display_rating($COURSE->id, true).'</div>';

        } else {

            if ($this->page->user_is_editing()) {

                $this->content->items[] = get_string('editingsitehome', 'block_rate_course');

            }

        }

        return $this->content;

    }

    /**

     * Checks whether any version of the course already exists.

     * @param int $courseid The ID of the course.

     * @return int  rating.

     */

    public function get_rating($courseid) {

        global $CFG, $DB;

        $sql = "SELECT AVG(rating) AS avg

        FROM {block_rate_course}

        WHERE course = $courseid";

        $avg = -1;

        if ($avgrec = $DB->get_record_sql($sql)) {

            $avg = $avgrec->avg * 2;  // Double it for half star scores.

            // Now round it up or down.

            $avg = round($avg);

        }

        return $avg;

    }

    /**

     * Outputs the current rating. Can be called outside the block.

     * @param int $courseid the ID of the course

     * @param bool $return return the string (true) or echo it immediately (false)

     * @return string the html to output graphic, alt text and number of ratings

     */

    public function display_rating($courseid, $return=false) {

        global $CFG, $DB;

        $count = $DB->count_records('block_rate_course', array('course'=>$courseid));

        $ratedby = '';

        if ($count > 0) {

            $ratedby = get_string ('rating_users', 'block_rate_course', $count);

        }

        $numstars = $this->get_rating( $courseid );

        if ($numstars == -1) {

            $alt = '';

        } else if ($numstars == 0) {

            $alt = get_string( 'rating_alt0', 'block_rate_course' );

        } else {

            $alt = get_string( 'rating_altnum', 'block_rate_course', $numstars/2 );

        }

        $res = '<img src="'.

                        $CFG->wwwroot.'/blocks/rate_course/pix/rating_graphic.php?courseid='.

                        $courseid.'" alt="'.$alt.'"/><br/>'.$ratedby;

        if ($return) {

            return $res;

        }

        echo $res;

    }

    public function show_rating($courseid) {

        global $CFG, $DB;

        // Pinned block check once per session for performance.

        if (!isset($_SESSION['starsenabled'])) {

            $_SESSION['starsenabled'] = $DB->get_field('block', 'visible',

                            array('name'=>'rate_course'));

            if ($_SESSION['starsenabled'] && !isset($_SESSION['starspinned'])) {

                $_SESSION['starspinned'] = $DB->get_record_sql(

                                "SELECT * FROM {block_pinned} p

                                JOIN {block} b ON b.id = p.blockid

                                WHERE pagetype = ? AND p.visible = ? AND b.name = ?",

                                array('course-view', 1, 'rate_course'));

            }

        }

        if (!$_SESSION['starsenabled']) {

            return false;

        }

        if ($_SESSION['starspinned']) {

            return true;

        }

        return $DB->get_record_sql("SELECT * FROM {block_instance} i

                        JOIN {block} b ON b.id = i.blockid

                        WHERE pageid = ? and b.name = ?", array($courseid, 'rate_course'));

    }

}