Admin

Source

File: classes/Admin.php

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class Admin {
 
    public function __construct() {
        add_action( 'admin_menu', [ $this, 'register_admin_menu' ] );
        add_action( 'admin_init', [ $this, 'filter_courses_for_instructors' ] );
 
        add_filter( 'plugin_action_links_' . DOZENT_BASENAME, [ $this, 'insert_plugin_settings_link' ], 10, 2 );
    }
 
    public function insert_plugin_settings_link( $links, $file ) {
        if ( $file === DOZENT_BASENAME ) {
            $links[] = '<a href="' . admin_url( 'options-general.php?page=dozent' ) . '">' . __( 'Settings', 'dozent' )
                       . '</a>';
        }
 
        return $links;
    }
 
    public function register_admin_menu() {
        //todo: manage_options will be instructor_permission
        add_menu_page( __( 'Dozent LMS', 'dozent' ), __( 'Dozent LMS', 'dozent' ), 'manage_options', 'dozent', null, 'dashicons-welcome-learn-more', 4 );
 
        add_submenu_page( 'dozent', __( 'Categories', 'dozent' ), __( 'Categories', 'dozent' ), 'manage_options', 'edit-tags.php?taxonomy=course_category&post_type=dozent_course', null );
 
        add_submenu_page( 'dozent', __( 'Instructors', 'dozent' ), __( 'Instructors', 'dozent' ), 'manage_options', 'dozent_instructors', [ $this, 'instructors' ] );
 
        add_submenu_page( 'dozent', __( 'Withdrawals', 'dozent' ), __( 'Withdrawals', 'dozent' ), 'manage_options', 'dozent_withdrawals', array( $this, 'withdrawals' ) );
 
 
        $optionClass = new Options();
        add_submenu_page( 'dozent', __( 'Settings', 'dozent' ), __( 'Settings', 'dozent' ), 'manage_options', 'dozent-options', [ &$optionClass, 'option_panel' ] );
    }
 
    public function instructors() {
        $sub_page = dozent_input_text( 'sub_page' );
 
        if ( $sub_page ) {
            include DOZENT_ABSPATH . "views/users/{$sub_page}.php";
        } else {
            include DOZENT_ABSPATH . "views/users/instructors.php";
        }
    }
 
    /**
     * Show all withdrawals from the instructors
     *
     * @since DozentLMS 1.0.0
     */
 
    public function withdrawals() {
        include DOZENT_ABSPATH . 'views/admin/withdrawals.php';
    }
 
    /**
     * Filter posts for the current instructor if insructor role is not administrator
     *
     * @since DozentLMS 1.0.0
     */
    public function filter_courses_for_instructors() {
        if ( ! current_user_can( 'administrator' ) && is_dozent_instructor() ) {
            remove_menu_page( 'edit-comments.php' ); //Comments
            add_filter( 'posts_clauses_request', [ $this, 'posts_clauses_request' ] );
        }
    }
 
    public function posts_clauses_request( $clauses ) {
        global $wpdb;
 
        $user_id = get_current_user_id();
         
        $courses_ids = $wpdb->get_col( "SELECT course_id from {$wpdb->dozent_instructor_courses} WHERE instructor_id = {$user_id}  " );
 
        $custom_author_query = "AND {$wpdb->posts}.post_author = {$user_id}";
        if ( dozent_count( $courses_ids ) ) {
            $in_query_pre = implode( ',', $courses_ids );
            $custom_author_query = "  AND ( {$wpdb->posts}.post_author = {$user_id} OR {$wpdb->posts}.ID IN({$in_query_pre}) ) ";
        }
 
        $clauses['where'] .= $custom_author_query;
 
        return $clauses;
    }
 
 
}

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