Control Sidebar Menu Display

Resource.php

<?php

namespace App\Nova;

use Illuminate\Support\Str;
use Illuminate\Http\Request;
use Laravel\Nova\Http\Requests\NovaRequest;
use Laravel\Nova\Resource as NovaResource;

abstract class Resource extends NovaResource
{
    /**
     * Determine if this resource is available for navigation.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return bool
     */
    public static function availableForNavigation(Request $request)
    {
        if(! isset(static::$permission)) {
            return true;
        }

        return auth()->user()->can('view-' . static::$permission);
    }

    /**
     * Build an "index" query for the given resource.
     *
     * @param \Laravel\Nova\Http\Requests\NovaRequest $request
     * @param \Illuminate\Database\Eloquent\Builder   $query
     *
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public static function indexQuery(NovaRequest $request, $query)
    {
        return $query;
    }

    /**
     * Build a Scout search query for the given resource.
     *
     * @param \Laravel\Nova\Http\Requests\NovaRequest $request
     * @param \Laravel\Scout\Builder                  $query
     *
     * @return \Laravel\Scout\Builder
     */
    public static function scoutQuery(NovaRequest $request, $query)
    {
        return $query;
    }

    /**
     * Build a "detail" query for the given resource.
     *
     * @param \Laravel\Nova\Http\Requests\NovaRequest $request
     * @param \Illuminate\Database\Eloquent\Builder   $query
     *
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public static function detailQuery(NovaRequest $request, $query)
    {
        return parent::detailQuery($request, $query);
    }

    /**
     * Build a "relatable" query for the given resource.
     *
     * This query determines which instances of the model may be attached to other resources.
     *
     * @param \Laravel\Nova\Http\Requests\NovaRequest $request
     * @param \Illuminate\Database\Eloquent\Builder   $query
     *
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public static function relatableQuery(NovaRequest $request, $query)
    {
        return parent::relatableQuery($request, $query);
    }
}