<?php
/*
Plugin Name: WP Fusion - User Roles
Description: Allows linking a tag with a WordPress user role to automatically set roles when tags are modified.
Plugin URI: https://verygoodplugins.com/
Version: 1.0
Author: Very Good Plugins
Author URI: https://verygoodplugins.com/
*/

function wpf_user_roles_tags_modified( $user_id, $user_tags ) {

    // Don't run for admins
    if ( user_can( $user_id, 'manage_options' ) ) {
        return;
    }

    $settings = get_option( 'wpf_roles_settings', array() );

    $user = get_user_by( 'id', $user_id );

    remove_action( 'profile_update', array( wp_fusion()->user, 'profile_update' ), 10, 2 );

    foreach ( $settings as $role_slug => $setting ) {

        if ( empty( $setting['tag_link'] ) ) {
            continue;
        }

        $result = array_intersect( $user_tags, $setting['tag_link'] );

        if ( ! empty( $result ) && ! in_array( $role_slug, $user->roles ) ) {

            wp_fusion()->logger->handle( 'info', $user_id, 'Adding user role <strong>' . $role_slug . '</strong>, triggered by linked tag <strong>' . $setting['tag_link'][0] . '</strong>' );

            $user->set_role( $role_slug );

        } elseif ( empty( $result ) && in_array( $role_slug, $user->roles ) ) {

            wp_fusion()->logger->handle( 'info', $user_id, 'Removing user role <strong>' . $role_slug . '</strong>, triggered by linked tag <strong>' . $setting['tag_link'][0] . '</strong>' );

            $user->remove_role( $role_slug );

        }
    }

}

add_action( 'wpf_tags_modified', 'wpf_user_roles_tags_modified', 10, 2 );

function wpf_user_roles_admin_menu() {

    $id = add_submenu_page(
        'options-general.php',
        'WP Fusion - User Roles',
        'WP Fusion Roles',
        'manage_options',
        'wpf-roles-settings',
        'wpf_user_roles_render_admin_menu'
    );

    add_action( 'load-' . $id, 'wpf_user_roles_enqueue_scripts' );

}

add_action( 'admin_menu', 'wpf_user_roles_admin_menu' );

function wpf_user_roles_enqueue_scripts() {

    wp_enqueue_style( 'bootstrap', WPF_DIR_URL . 'includes/admin/options/css/bootstrap.min.css' );
    wp_enqueue_style( 'options-css', WPF_DIR_URL . 'includes/admin/options/css/options.css' );
    wp_enqueue_style( 'wpf-options', WPF_DIR_URL . 'assets/css/wpf-options.css' );

}

function wpf_user_roles_render_admin_menu() {

    // Save settings
    if ( isset( $_POST['wpf_roles_settings_nonce'] ) && wp_verify_nonce( $_POST['wpf_roles_settings_nonce'], 'wpf_roles_settings' ) ) {
        update_option( 'wpf_roles_settings', $_POST['wpf-settings'] );
        echo '<div id="message" class="updated fade"><p><strong>Settings saved.</strong></p></div>';
    }

    ?>

    <div class="wrap">
        <h2>WP Fusion Roles</h2>

        <form id="wpf-roles-settings" action="" method="post">
            <?php wp_nonce_field( 'wpf_roles_settings', 'wpf_roles_settings_nonce' ); ?>
            <input type="hidden" name="action" value="update">


            <?php global $wp_roles; ?>

            <?php $all_roles      = $wp_roles->roles; ?>
            <?php $editable_roles = apply_filters( 'editable_roles', $all_roles ); ?>

            <?php $settings       = get_option( 'wpf_roles_settings', array() ); ?>

            <table class="table table-hover" id="wpf-mm-products-table">
                <thead>
                <tr>
                    <th>Role</th>
                    <th>Link With Tag</th>
                </tr>
                </thead>
                <tbody>

                <?php foreach ( $editable_roles as $slug => $role ) : ?>

                    <?php
                    if ( ! isset( $settings[ $slug ]['tag_link'] ) ) {
                        $settings[ $slug ]['tag_link'] = array();
                    }
                    ?>

                    <tr>
                        <td><?php echo $role['name']; ?></td>
                        <td id="wpf-tags-td">
                            <?php

                            $args = array(
                                'setting'      => $settings[ $slug ],
                                'meta_name'    => 'wpf-settings',
                                'field_id'     => $slug,
                                'field_sub_id' => 'tag_link',
                                'placeholder'  => 'Select a tag',
                                'limit'        => 1,
                            );

                            wpf_render_tag_multiselect( $args );

                            ?>

                        </td>
                    </tr>

                <?php endforeach; ?>

                </tbody>

            </table>

            <p class="submit"><input name="Submit" type="submit" class="button-primary" value="Save Changes"/>
            </p>

        </form>

    </div>

    <?php

}