invoiceninja/app/Filters/QueryFilters.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Filters;

use App\Models\User;
//use Illuminate\Database\Query\Builder;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\Request;

/**
 * Class QueryFilters.
 */
abstract class QueryFilters
{
    /**
     * active status.
     */
    const STATUS_ACTIVE = 'active';

    /**
     * archived status.
     */
    const STATUS_ARCHIVED = 'archived';

    /**
     * deleted status.
     */
    const STATUS_DELETED = 'deleted';

    /**
     * The request object.
     *
     * @var Request
     */
    protected $request;

    /**
     * The builder instance.
     *
     * @var Builder
     */
    protected $builder;

    /**
     * Create a new QueryFilters instance.
     *
     * @param Request $request
     */
    public function __construct(Request $request)
    {
        $this->request = $request;
    }

    /**
     * Apply the filters to the builder.
     *
     * @param  Builder $builder
     * @return Builder
     */
    public function apply(Builder $builder)
    {
        $this->builder = $builder;

        $this->entityFilter();

        $this->clientFilter();

        foreach ($this->filters() as $name => $value) {
            if (! method_exists($this, $name)) {
                continue;
            }

            if (strlen($value)) {
                $this->$name($value);
            } else {
                $this->$name();
            }
        }

        return $this->builder->withTrashed();
    }

    /**
     * Get all request filters data.
     *
     * @return array
     */
    public function filters()
    {
        return $this->request->all();
    }

    /**
     * Explodes the value by delimiter.
     *
     * @param  string $value
     * @return stdClass
     */
    public function split($value) : stdClass
    {
        $exploded_array = explode(':', $value);

        $parts = new stdClass;

        $parts->value = $exploded_array[0];
        $parts->operator = $this->operatorConvertor($exploded_array[1]);

        return $parts;
    }

    /**
     * String to operator convertor.
     *
     * @param  string $value
     * @return string
     */
    private function operatorConvertor(string $operator) : string
    {
        switch ($operator) {
            case 'lt':
                return '<';
                break;
            case 'gt':
                return '>';
                break;
            case 'lte':
                return '<=';
                break;
            case 'gte':
                return '>=';
                break;
            case 'eq':
                return '=';
                break;
            default:
                return '=';
                break;

        }
    }

    /**
     * Filters the query by the contact's client_id.
     *
     * -Can only be used on contact routes
     *
     * @param       $client_id The client Id
     * @param      Illuminate\Database\Query\Builder
     */
    public function clientFilter()
    {
        if (auth('contact')->user()) {
            return $this->builder->whereClientId(auth('contact')->user()->client->id);
        }
    }
}