moodle-block_mytreestudyplan/block_mytreestudyplan.php

<?php
use local_treestudyplan\studyplan;

class block_mytreestudyplan extends \block_base {

    public $levelset;

    public function init() {
        global $PAGE;
        global $CFG;
        $this->title = get_string('title', 'block_mytreestudyplan');
        $systemcontext = \context_system::instance();
        $teachermode = has_capability("local/treestudyplan:viewuserreports",$systemcontext);

        // Load CSS files from treestudyplan
        try{
            $PAGE->requires->css(new \moodle_url($CFG->wwwroot.'/local/treestudyplan/css/bootstrap-vue.min.css'));
            $PAGE->requires->css(new \moodle_url($CFG->wwwroot.'/local/treestudyplan/css/devstyles.css'));
            // include javascript and run studyplan renderer when page loading is complete
            $PAGE->requires->js_call_amd('block_mytreestudyplan/block_mytreestudyplan', 'init',[$teachermode?'teaching':'myreport']);
        } catch( Exception $x) {
            // On some occasions (Plugin management), the plugin is loaded after HEAD has been printed. In those cases we don't want to show the block anyway,
            // so ignore the error that gets inevitably thrown
        }
    }


    public function applicable_formats()
    {
        // Limit this block to the site index and the dashboard (my) pages
        return [
            'admin' => false,
            'site-index' => true,
            'course-view' => false,
            'mod' => false,
            'my' => true
        ];
    }


    public function get_content() {
        global $CFG;
        global $USER;
        global $COURSE;
        global $OUTPUT;
        
        if ($this->content !== null) {
            return $this->content;
        }

        $coursecontext = \context_course::instance($COURSE->id);
        $systemcontext = \context_system::instance();
        //TODO: Check if they have the permission in any relevant context, not just system
        $teachermode = has_capability("local/treestudyplan:viewuserreports",$systemcontext);

        $this->content =  new \stdClass;
        $this->content->text = "";

        $mystudyplans = studyplan::find_for_user($USER->id);

        $data = [
            'teachermode' => $teachermode,
        ];

        $this->content->text   = $OUTPUT->render_from_template("block_mytreestudyplan/block",$data);

        $invite_url =$CFG->wwwroot.'/local/treestudyplan/invitations.php';
        $invite_text = get_string('manage_invites','local_treestudyplan');

        
        if ( (!$teachermode ) && count($mystudyplans) > 0) {
            $this->content->footer = "&nbsp; <a class='btn btn-primary' href='{$invite_url}'>{$invite_text}</a>";
        }
        
        return $this->content;
    }


    public function hide_header() { return false; }

    public function has_config() { return false; }
    




}