index.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// 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 <http://www.gnu.org/licenses/>.

/**
 * Index file of the GenAI question generation plugin.
 *
 * @package    qbank_genai
 * @copyright  2023 Christian Grévisse <christian.grevisse@uni.lu>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require('../../../config.php');
require_once($CFG->dirroot.'/question/bank/genai/lib.php');

$courseid = required_param('courseid', PARAM_INT);

$url = new moodle_url('/question/bank/genai/index.php', ['courseid' => $courseid]);
$PAGE->set_url($url);

$course = get_course($courseid);

require_login($course);

$course = course_get_format($course)->get_course();

$context = context_course::instance($course->id);
$PAGE->set_context($context);

require_all_capabilities(qbank_genai_required_capabilities(), $context);

$PAGE->set_pagelayout('standard');
$PAGE->set_title(get_string('title', 'qbank_genai'));

$PAGE->set_heading(format_string($course->fullname));

echo $OUTPUT->header();

// Print tertiary navigation.
$renderer = $PAGE->get_renderer('core_question', 'bank');
$qbankaction = new \core_question\output\qbank_action_menu($url);
echo $renderer->render($qbankaction);

echo $OUTPUT->heading(get_string('title', 'qbank_genai'));

// Check for OpenAI API key.
$openaiapikey = qbank_genai_get_openai_apikey($course->id);
if (empty($openaiapikey)) {
    echo html_writer::tag('div', get_string('noopenaiapikey', 'qbank_genai'), ['class' => 'alert alert-warning']);
}

// Show ongoing generation tasks (if any).
$existingtasks = $DB->get_records('task_adhoc', ['userid' => $USER->id, 'component' => 'qbank_genai']);
if (!empty($existingtasks)) {

    echo html_writer::start_tag('div', ['class' => 'alert alert-info']);
    echo html_writer::tag('p', get_string('ongoingtasks', 'qbank_genai'));
    echo html_writer::start_tag('ul');

    foreach ($existingtasks as $task) {
        echo html_writer::start_tag('li');
        $resourcenames = qbank_genai_get_resource_names_string(json_decode($task->customdata)->resources);
        echo html_writer::tag('span', format_text($resourcenames, FORMAT_PLAIN));
        echo html_writer::tag('small', userdate($task->timecreated), ['class' => 'text-muted ml-2']);
    }

    echo html_writer::end_tag('li');
    echo html_writer::end_tag('ul');
    echo html_writer::end_tag('div');

}

// Get course resources.
$resources = qbank_genai_get_course_resources($course);

if (count($resources) == 0) {
    echo html_writer::start_tag('div', ['class' => 'alert alert-warning']);
    echo html_writer::tag('p', get_string('noresources', 'qbank_genai'));
    echo html_writer::end_tag('div');
} else {
    // Form handling.
    $mform = new \qbank_genai\form\generation_form($url, $resources);

    if ($fromform = $mform->get_data()) {
        $ids = [];

        foreach ($fromform->resource as $id => $selected) {
            if (boolval($selected)) {
                $ids[] = $id;
            }
        }

        $selectedresources = [];

        foreach ($resources as $resource) {
            if (in_array($resource->id, $ids)) {
                $selectedresources[] = (object) [
                    "id" => $resource->id,
                    "name" => $resource->name,
                    "visible" => $resource->visible,
                ];
            }
        }

        // Launch generation task.
        $task = \qbank_genai\task\generation_task::instance($selectedresources, $USER->id, $context->id, $course->id);
        \core\task\manager::queue_adhoc_task($task); // Add true to avoid duplicates.

        // Log generation task launched.
        $event = \qbank_genai\event\generation_launched::create(['context' => $context, 'other' => ["ids" => $ids]]);
        $event->trigger();

        // Redirect to this page again (seems to interfere with mtrace in adhoc task ...).
        // Also, consider redirecting before any $OUTPUT->...
        redirect($PAGE->url);
    } else {
        $mform->display();
    }
}

echo $OUTPUT->footer();