<?php
// This file is part of the Studyplan plugin for Moodle
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <https://www.gnu.org/licenses/>.
/**
 * Main block code
 *
 * @package    block_mytreestudyplan
 * @copyright  2023 P.M. Kuipers
 * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use local_treestudyplan\studyplan;

/**
 * MyTreestudyplan block base code
 */
class block_mytreestudyplan extends \block_base {

    /**
     * Plugin initialization (before $this->config and $this->page are loaded)
     */
    public function init() {
    }

    /**
     * Plugin specialization (directly called after $this->config and $this->page are ready)
     */
    public function specialization() {
        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 {
            $this->page->requires->css(new \moodle_url($CFG->wwwroot.'/local/treestudyplan/css/bootstrap-vue/bootstrap-vue.min.css'));
            if($CFG->debugdeveloper){
                $this->page->requires->css(new moodle_url($CFG->wwwroot.'/local/treestudyplan/css/devstyles.css'));
            }
            $this->page->add_body_class("features-treestudyplan"); // Mark body as containing treestudyplan content.
            // Include javascript and run studyplan renderer when page loading is complete.
            $this->page->requires->js_call_amd('block_mytreestudyplan/block_mytreestudyplan',
                                         'init',
                                         [$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.
            $off = 0; // Empty statement to satisfy code checker.
        }
    }

    /**
     * Publish the pages this block can be shown on
     */
    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
        ];
    }

    /**
     * Render block content
     */
    public function get_content() {
        global $CFG;
        global $USER;
        global $COURSE;
        global $OUTPUT;

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

        $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);

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

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

        return $this->content;
    }

    /**
     * Whether to hide the header or not
     */
    public function hide_header() {
        return false;
    }

    /**
     * Whether this block has config or not
     */
    public function has_config() {
        return false;
    }

    /**
     * Return true to avoid broken self-test message
     */
    function _self_test() {
        return true;
      }
}