<?PHP //$Id$

include_once($CFG->dirroot . '/course/lib.php');

class block_course_list extends block_list {
    function init() {
        $this->title = get_string('courses');
        $this->version = 2004111600;
    }
    
    function has_config() {
        return true;
    }

    function get_content() {
        global $THEME, $CFG, $USER;

        if($this->content !== NULL) {
            return $this->content;
        }

        $this->content = new stdClass;
        $this->content->items = array();
        $this->content->icons = array();
        $this->content->footer = '';

        $icon  = "<img src=\"$CFG->pixpath/i/course.gif\"".
                 " class=\"icon\" alt=\"".get_string("course")."\" />";
       
        $adminseesall = true;
        if (isset($CFG->block_course_list_adminview)) {
           if ( $CFG->block_course_list_adminview == 'own'){
               $adminseesall = false;
           }
        }

        if (empty($CFG->disablemycourses) and 
            !empty($USER->id) and 
            !(has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM)) and $adminseesall) and
            !isguest()) {    // Just print My Courses
            if ($courses = get_my_courses($USER->id)) {
                foreach ($courses as $course) {
                    if ($course->id == SITEID) {
                        continue;
                    }
                    $linkcss = $course->visible ? "" : " class=\"dimmed\" ";
                    $this->content->items[]="<a $linkcss title=\"$course->shortname\" ".
                               "href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->fullname</a>";
                    $this->content->icons[]=$icon;
                }
                $this->title = get_string('mycourses');
                $this->content->footer = "<a href=\"$CFG->wwwroot/course/index.php\">".get_string("fulllistofcourses")."</a>...";
                if ($this->content->items) { // make sure we don't return an empty list
                    $this->get_remote_courses();
                    return $this->content;
                }
            }
        }

        $categories = get_categories("0");  // Parent = 0   ie top-level categories only
        if ($categories) {   //Check we have categories
            if (count($categories) > 1 || (count($categories) == 1 && count_records('course') > 200)) {     // Just print top level category links
                foreach ($categories as $category) {
                    $linkcss = $category->visible ? "" : " class=\"dimmed\" ";
                    $this->content->items[]="<a $linkcss href=\"$CFG->wwwroot/course/category.php?id=$category->id\">$category->name</a>";
                    $this->content->icons[]=$icon;
                }
                $this->content->footer = "<a href=\"$CFG->wwwroot/course/\">".get_string("searchcourses")."</a>...<br />".
                                         "<a href=\"$CFG->wwwroot/course/index.php\">".get_string("fulllistofcourses")."</a>...";
                $this->title = get_string('categories');
            } else {                          // Just print course names of single category
                $category = array_shift($categories);
                $courses = get_courses($category->id);

                if ($courses) {
                    foreach ($courses as $course) {
                        $linkcss = $course->visible ? "" : " class=\"dimmed\" ";
                        $this->content->items[]="<a $linkcss title=\"$course->shortname\" ".
                                   "href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->fullname</a>";
                        $this->content->icons[]=$icon;
                    }
                    $this->content->footer = "<a href=\"$CFG->wwwroot/course/index.php\">".get_string("fulllistofcourses")."</a>...";
                    $this->get_remote_courses();
                } else {
                    if ($this->get_remote_courses()) {
                        $this->content->items = array();
                        $this->content->icons = array();
                        $this->content->footer = get_string('nocoursesyet').'<br /><br />';
                        if (has_capability('moodle/course:create', get_context_instance(CONTEXT_COURSECAT, $category->id))) {
                            $this->content->footer .= '<a href="'.$CFG->wwwroot.'/course/edit.php?category='.$category->id.'">'.get_string("addnewcourse").'</a>...';
                        }
                    }
                }
                $this->title = get_string('courses');
            }
        }

        return $this->content;
    }

    function get_remote_courses() {
        global $THEME, $CFG, $USER;
        $sql = "SELECT c.remoteid, c.shortname, c.fullname, c.hostid
                FROM   {$CFG->prefix}mnet_enrol_course c
                JOIN   {$CFG->prefix}mnet_enrol_assignments a ON c.id=a.courseid
                WHERE  a.userid={$USER->id}";
        if ($courses = get_records_sql($sql)) {
            $icon  = "<img src=\"$CFG->pixpath/i/mnethost.png\"".
                " class=\"icon\" alt=\"".get_string("course")."\" />";
            $this->content->items[] = 'Remote Courses';
            $this->content->icons[] = '';
            foreach ($courses as $course) {
                $this->content->items[]="<a title=\"$course->shortname\" ".
                               "href=\"{$CFG->wwwroot}/auth/mnet/jump.php?hostid={$course->hostid}&amp;wantsurl=/course/view.php?id={$course->remoteid}\">$course->fullname</a>";
                $this->content->icons[]=$icon;
            }
        } else {
            return false;
        }
        return true;
    }

}

?>