/**
* Performs all the operations in order to display the block output:
* - Checks if it is the first time that the block is loaded in the course, to check if the course is personalizable
* or not.
* - Checks if the current user is selected to receive the recommendations.
* - Retrieves the recommendations from the database.
*
* @return string The content of the block.
*/
public function get_content()
{
global $COURSE, $USER, $DB;
if ($this->content !== null) {
return $this->content;
}
if (empty($this->instance)) {
$this->content = '';
return $this->content;
}
$this->content = new stdClass();
$this->content->text = '';
$context = context_course::instance($COURSE->id);
if (has_capability('block/mycourse_recommendations:importfromcsv', $context)) {
$this->content->footer = $this->generate_footer_import_url($COURSE->id);
} else {
$this->content->footer = '';
}
$courseyear = $this->db->get_course_start_week_and_year($COURSE->id)['year'];
$firstinstance = $this->db->is_blocks_first_instance($COURSE->id);
if ($firstinstance) {
$this->initialize_course($COURSE->id, $courseyear);
}
$isuser = has_capability('block/mycourse_recommendations:recommendationstext', $context);
if ($isuser) {
$personalizable = $this->db->is_course_personalizable($COURSE->id);
if ($personalizable) {
$active = $this->db->is_course_active($COURSE->id);
if ($active) {
$userselected = $this->db->is_user_selected_for_course($USER->id, $COURSE->id);
if (!$userselected) {
$this->content->text = get_string('usernotselected', 'block_mycourse_recommendations');
} else {
$currentweek = $this->get_current_week();
$recommendations = $this->db->get_recommendations($COURSE->id, $USER->id, $currentweek);
$this->content->text = recommendations_renderer::render_recommendations($recommendations);
}
} else {
$this->content->text = get_string('inactive', 'block_mycourse_recommendations');
}
} else {
$this->content->text = get_string('notpersonalizable', 'block_mycourse_recommendations');
}
} else {
$this->content->text = get_string('notastudent', 'block_mycourse_recommendations');
}
return $this->content;
}
