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<?php
/**
* Course outline AI module.
*
* @package LearnDash\Core
*/
namespace LearnDash\Core\Modules\AI;
use Exception;
use InvalidArgumentException;
use LDLMS_Course_Steps;
use LDLMS_Factory_Post;
use LDLMS_Post_Types;
use LearnDash\Core\Services\ChatGPT;
use SFWD_LMS;
use StellarWP\Learndash\lucatume\DI52\App;
/**
* Course outline generator AI class.
*
* @since 4.6.0
*/
class Course_Outline {
/**
* Page slug.
*
* @since 4.6.0
*
* @var string
*/
public static $slug = 'learndash-ai-course-outline';
/**
* AJAX actions.
*
* @since 4.6.0
*
* @var array<string, string>
*/
public static $ajax_actions = [
'get_course' => 'ld_get_course',
];
/**
* Maximum number of allowed lessons.
*
* @since 4.6.0
*
* @var int
*/
private static $max_lessons = 30;
/**
* ChatGPT client.
*
* @since 4.6.0
*
* @var ChatGPT
*/
private $chatgpt;
/**
* Constructor.
*
* @since 4.6.0
*
* @param ChatGPT $chatgpt ChatGPT client.
*/
public function __construct( ChatGPT $chatgpt ) {
$this->chatgpt = $chatgpt;
}
/**
* Add the course wizard button to the course list table.
* TODO: Add this button via the Global Header Component rather than by injecting it like this.
*
* @since 4.6.0
*
* return void
*/
public function add_button(): void {
$screen = get_current_screen();
if ( is_object( $screen ) && 'edit-' . learndash_get_post_type_slug( LDLMS_Post_Types::COURSE ) === $screen->id ) {
$label = wp_sprintf(
// translators: Course label.
__( 'Create %s Outline from AI', 'learndash' ),
learndash_get_custom_label( 'course' )
);
?>
<script>
( function() {
window.addEventListener( 'load', function() {
const settingsElem = document.getElementsByClassName( 'ld-global-header-new-settings' );
const newEntityElem = document.getElementsByClassName( 'global-new-entity-button' );
const link = document.createElement( 'a' );
const text = document.createTextNode( '<?php echo esc_html( $label ); ?>' );
link.setAttribute( 'href', '<?php echo esc_url( admin_url( 'admin.php?page=' . static::$slug ) ); ?>' );
link.setAttribute( 'class', 'global-new-entity-button button button-primary button-small' );
link.appendChild( text );
settingsElem[0].insertBefore( link, newEntityElem[0] );
});
} )();
</script>
<?php
}
}
/**
* Register admin pages.
*
* @since 4.6.0
*
* @return void
*/
public function register_page(): void {
add_submenu_page(
'learndash-lms',
wp_sprintf(
// translators: Course label.
__( 'Create %s Outline from AI', 'learndash' ),
learndash_get_custom_label( 'course' )
),
'',
LEARNDASH_ADMIN_CAPABILITY_CHECK,
static::$slug,
App::callback( $this, 'render' )
);
}
/**
* Add admin styles.
*
* @since 4.6.0
*
* @return void
*/
public function add_scripts(): void {
?>
<style>
#adminmenu .toplevel_page_learndash-lms .wp-submenu a[href="admin.php?page=<?php echo esc_attr( static::$slug ); ?>"] {
display: none;
}
</style>
<?php
$screen = get_current_screen();
if ( is_object( $screen ) && 'learndash-lms_page_' . static::$slug === $screen->id ) {
?>
<style>
.select2-container {
border: 1px solid #8c8f94;
border-radius: 4px;
}
.select2-container.select2-container--default {
height: 30px;
}
.select2-container .select2-selection--single {
height: 30px;
line-height: 30px;
}
</style>
<script>
( function() {
jQuery( function( $ ) {
$( '.submenu-ldlms-courses' ).addClass( 'current' );
$( 'select[name="course_id"]' ).select2({
width: '100%',
allowClear: true,
placeholder: '',
multiple: false,
maximumSelectionSize: 1,
minimumInputLength: 3,
style: '30px',
ajax: {
url: "<?php echo esc_url( admin_url( 'admin-ajax.php' ) ); ?>",
method: 'GET',
dataType: 'json',
delay: 300,
data: function ( params ) {
return {
action: '<?php echo esc_attr( static::$ajax_actions['get_course'] ); ?>',
nonce: '<?php echo esc_attr( wp_create_nonce( static::$ajax_actions['get_course'] ) ); ?>',
keyword: params.term
};
},
processResults: function ( response, params ) {
params.page = params.page || 1;
return {
results: response.data.items,
};
},
cache: false
}
});
} );
} )();
</script>
<?php
}
}
/**
* Enqueue admin scripts.
*
* @since 4.6.0
*
* @return void
*/
public function enqueue_admin_scripts(): void {
$screen = get_current_screen();
if ( is_object( $screen ) && 'learndash-lms_page_' . static::$slug === $screen->id ) {
wp_enqueue_style( 'ld-tailwindcss' );
}
}
/**
* Render page.
*
* @since 4.6.0
*
* @todo Change with the new admin view render after Breezy template update.
*
* @return void
*/
public function render(): void {
SFWD_LMS::get_view(
'AI/course-outline',
[
'api_key' => $this->chatgpt->get_api_key(),
],
true
);
}
/**
* Execute ChatGPT command.
*
* @since 4.6.0
*
* @throws InvalidArgumentException Invalid argument value.
*
* @return void
*/
public function init(): void {
if ( ! current_user_can( 'manage_options' ) || ! check_admin_referer( static::$slug ) ) {
wp_die( 'Unauthorized access.' );
}
if ( isset( $_POST['course_id'] ) && isset( $_POST['lesson_count'] ) && isset( $_POST['course_idea'] ) ) {
try {
$course_id = sanitize_text_field( wp_unslash( $_POST['course_id'] ) );
$lesson_count = absint( $_POST['lesson_count'] );
$course_idea = sanitize_textarea_field( wp_unslash( $_POST['course_idea'] ) );
if ( $lesson_count > self::$max_lessons ) {
throw new InvalidArgumentException(
wp_sprintf(
// translators: 1$: Maximum amount of lessons, 2$: Lessons label.
__( 'Error: %1$s is maximum number of %2$s you can enter.', 'learndash' ),
self::$max_lessons,
learndash_get_custom_label_lower( 'lessons' )
)
);
}
$course = json_decode( $course_id, true );
$course_title = is_array( $course ) && ! empty( $course['title'] ) ? $course['title'] : get_the_title( absint( $course ) );
$course_id = ! is_array( $course ) || empty( $course['title'] ) ? absint( $course ) : 0;
$command = "Create a numbered bullet list with {$lesson_count} lesson titles for a '{$course_title}' course on the topic of '{$course_idea}'.";
$response = $this->chatgpt->send_command( $command );
} catch ( Exception $e ) {
learndash_safe_redirect(
admin_url(
add_query_arg(
[
'page' => static::$slug,
'error' => rawurlencode( $e->getMessage() ),
],
'admin.php'
)
)
);
exit;
}
$parsed_response = $this->parse(
$response,
array(
'id' => $course_id,
'title' => $course_title,
)
);
$process = $this->process( $parsed_response );
learndash_safe_redirect(
add_query_arg(
[
'page' => static::$slug,
'success' => rawurlencode( $process ),
],
admin_url( 'admin.php' )
)
);
exit;
}
}
/**
* Parse ChatGPT response.
*
* @since 4.6.0
*
* @param string $response_text Response text given by ChatGPT.
* @param array<string, mixed> $course_args Course args.
* @return array<string, mixed>
*/
private function parse( string $response_text, array $course_args ): array {
$lines = explode( PHP_EOL, trim( $response_text ) );
$lesson_titles = [];
foreach ( $lines as $line ) {
if ( preg_match( '/^\d+\./', $line ) ) {
$lesson_title = trim( substr( $line, strpos( $line, '.' ) + 1 ) );
if ( ! empty( $lesson_title ) ) {
$lesson_titles[] = $lesson_title;
}
}
}
return [
'course_title' => $course_args['title'],
'course_id' => $course_args['id'],
'lesson_count' => count( $lesson_titles ),
'lesson_titles' => $lesson_titles,
];
}
/**
* Process parsed response.
*
* @since 4.6.0
*
* @param array<string, mixed> $parsed_response Response text after being parsed.
* @return string
*/
private function process( array $parsed_response ): string {
$course_id = $parsed_response['course_id'];
/**
* Course title.
*
* @var string
*/
$course_title = $parsed_response['course_title'];
$lesson_titles = is_array( $parsed_response['lesson_titles'] ) ? $parsed_response['lesson_titles'] : [];
if ( empty( $course_id ) ) {
$course_id = wp_insert_post(
[
'post_title' => $course_title,
'post_type' => learndash_get_post_type_slug( LDLMS_Post_Types::COURSE ),
'post_status' => 'publish',
]
);
}
$course_id = absint( $course_id );
$lesson_count = count( $lesson_titles );
for ( $i = 0; $i < $lesson_count; $i++ ) {
$lesson_title = $lesson_titles[ $i ];
$lesson_id = wp_insert_post(
[
'post_title' => $lesson_title,
'post_type' => 'sfwd-lessons',
'post_status' => 'publish',
]
);
learndash_update_setting( $lesson_id, 'course', $course_id );
learndash_course_add_child_to_parent( $course_id, $lesson_id, $course_id );
}
$message = wp_sprintf(
// translators: 1$: lessons count, 2$: lesson label, 3$: course label, 4$: clickable course title.
__( '%1$d %2$s have been created successfully for the %3$s: %4$s.', 'learndash' ),
$lesson_count,
// phpcs:ignore WordPress.WP.I18n.MissingArgDomain
_n(
// phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralSingle
learndash_get_custom_label( 'lesson' ),
// phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralPlural
learndash_get_custom_label( 'lessons' ),
$lesson_count
),
learndash_get_custom_label_lower( 'course' ),
'<a href="' . get_edit_post_link( $course_id ) . '">' . get_the_title( $course_id ) . '</a>'
);
return $message;
}
/**
* AJAX request handler.
*
* @since 4.6.0
*
* @return void
*/
public function handle_ajax_request(): void {
if ( ! current_user_can( LEARNDASH_ADMIN_CAPABILITY_CHECK ) ) {
wp_send_json_error( [ 'message' => 'Unauthorized' ], 401 );
}
// phpcs:ignore
if ( ! isset( $_GET['nonce'] ) || ! isset( $_GET['action'] ) || ! wp_verify_nonce( $_GET['nonce'], $_GET['action'] ) ) {
wp_send_json_error( [ 'message' => 'Unauthorized' ], 401 );
}
switch ( $_GET['action'] ) {
case static::$ajax_actions['get_course']:
$keyword = isset( $_GET['keyword'] ) ? sanitize_text_field( wp_unslash( $_GET['keyword'] ) ) : '';
$posts = get_posts(
[
'post_type' => learndash_get_post_type_slug( LDLMS_Post_Types::COURSE ),
'post_status' => 'any',
's' => $keyword,
]
);
$posts = array_map(
function( $post ) {
return [
'id' => $post->ID,
'text' => $post->post_title . ' (ID: ' . $post->ID . ')',
];
},
$posts
);
$items = array_merge(
[
[
'id' => wp_json_encode(
array(
'new' => md5( microtime() ),
'title' => $keyword,
)
),
'text' => wp_sprintf(
// translators: 1$: keyword, 2$: course label.
esc_html__( '%1$s (New %2$s)', 'learndash' ),
$keyword,
learndash_get_custom_label( 'course' )
),
],
],
$posts
);
$response = [
'items' => $items,
];
break;
default:
$response = [];
break;
}
wp_send_json_success( $response );
}
}