<?php
// this deals with tabs, as well as print_headers for navigation

if ($currenttab != 'update') {
    switch ($context->aggregatelevel) {
      
        case CONTEXT_SYSTEM:
            $stradministration = get_string('administration');
            print_header($site->fullname, "$site->fullname","<a href=\"../index.php\">$stradministration</a> -> $straction");
        break;
    
        case CONTEXT_PERSONAL:
        break;
    
        case CONTEXT_USERID:
            print_header();
        break;
    
        case CONTEXT_COURSECAT:
            $category = get_record('course_categories', 'id', $context->instanceid);
            $strcategories = get_string("categories");
            $strcategory = get_string("category");
            $strcourses = get_string("courses");
            print_header("$site->shortname: $category->name", "$site->fullname: $strcourses",
                         "<a href=\"$CFG->wwwroot/course/index.php\">$strcategories</a> -> <a href=\"$CFG->wwwroot/course/category.php?id=$category->id\">$category->name</a> -> $straction", "", "", true);
        break;
    
        case CONTEXT_COURSE:
            $streditcoursesettings = get_string("editcoursesettings");
            
            $course = get_record('course', 'id', $context->instanceid);
            print_header($streditcoursesettings, "$course->fullname",
                         "<a href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</a>
                          -> <a href=\"$CFG->wwwroot/course/edit.php?id=$course->id\">$streditcoursesettings</a> -> $straction");
        break;
    
        case CONTEXT_GROUP:
        break;
    
        case CONTEXT_MODULE:
            // get module type?
            $cm = get_record('course_modules','id',$context->instanceid);
            $module = get_record('modules','id',$cm->module); //$module->name;
            $course = get_record('course','id',$cm->course);
            
            if (! $form = get_record($module->name, "id", $cm->instance)) {
                error("The required instance of this module doesn't exist");
            }
    
            $strnav = "<a href=\"$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id\">$form->name</a> ->";
            $fullmodulename = get_string("modulename", $module->name);
            $streditinga = get_string("editinga", "moodle", $fullmodulename);
            $strmodulenameplural = get_string("modulenameplural", $module->name);
    
            if ($module->name == "label") {
                $focuscursor = "";
            } else {
                $focuscursor = "form.name";
            }
    
            print_header_simple($streditinga, '',
             "<a href=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</a> ->
             $strnav <a href=\"$CFG->wwwroot/course/mod.php?update=$cm->id&sesskey=".sesskey()."\">$streditinga</a> -> $straction", $focuscursor, "", false);
    
        break;
    
        case CONTEXT_BLOCK:
            print_header();
        break;
    
        default:
            error ('This is an unknown context!');
        return false;
       
    }
}


    // Printing the tabs
    if ($context->aggregatelevel == CONTEXT_MODULE) { // only show update button if module?
    
        $toprow[] = new tabobject('update', $CFG->wwwroot.'/course/mod.php?update='.$context->instanceid.'&amp;return=true&amp;sesskey='.sesskey(), get_string('update'));
        
    }    
    
    $toprow[] = new tabobject('roles', $CFG->wwwroot.'/admin/roles/assign.php?contextid='.$context->id, get_string('roles')); 

    if (isset($tabsmode)) {
      
        if (!isset($assignableroles)) {
            $assignableroles = get_assignable_roles($context);          
        }
        if (!isset($overridableroles)) {
            $overridableroles = get_overridable_roles($context); 
        }    
    
      
        $inactive[] = 'roles';
        if (!empty($assignableroles)) {
            $secondrow[] = new tabobject('assign', $CFG->wwwroot.'/admin/roles/assign.php?contextid='.$context->id, get_string('assignroles', 'role')); 
        }
             
        if (!empty($overridableroles)) {  
            if ($context->aggregatelevel == CONTEXT_SYSTEM) {
                $secondrow[] = new tabobject('override', '', get_string('overrideroles', 'role'));         
            } else {
                $secondrow[] = new tabobject('override', $CFG->wwwroot.'/admin/roles/override.php?contextid='.$context->id,
                                          get_string('overrideroles', 'role'));         
            }
        }
        
        if ($tabsmode == 'override') {
            $currenttab = 'override';  
        } elseif ($tabsmode == 'assign') {
            $currenttab = 'assign';  
        }
        
    } else {
        $inactive[] = '';  
    }
    
    if (!empty($secondrow)) {
        $tabs = array($toprow, $secondrow);
    } else {
        $tabs = array($toprow);
    }
    
    if ($context->aggregatelevel != CONTEXT_SYSTEM) { // do not show tabs otherwise
        print_tabs($tabs, $currenttab, $inactive);
    }

?>