/** * 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; }