firefly-iii/app/Factory/CategoryFactory.php

<?php

/**
 * CategoryFactory.php
 * Copyright (c) 2019 james@firefly-iii.org
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace FireflyIII\Factory;

use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Models\Category;
use FireflyIII\User;
use Illuminate\Database\QueryException;
use Illuminate\Support\Facades\Log;

/**
 * Class CategoryFactory
 */
class CategoryFactory
{
    private User $user;

    /**
     * @param  string  $name
     *
     * @return Category|null
     */
    public function findByName(string $name): ?Category
    {
        return $this->user->categories()->where('name', $name)->first();
    }

    /**
     * @param  int|null  $categoryId
     * @param  null|string  $categoryName
     *
     * @return Category|null
     * @throws FireflyException
     */
    public function findOrCreate(?int $categoryId, ?string $categoryName): ?Category
    {
        $categoryId   = (int)$categoryId;
        $categoryName = (string)$categoryName;

        Log::debug(sprintf('Going to find category with ID %d and name "%s"', $categoryId, $categoryName));

        if ('' === $categoryName && 0 === $categoryId) {
            return null;
        }
        // first by ID:
        if ($categoryId > 0) {
            /** @var Category $category */
            $category = $this->user->categories()->find($categoryId);
            if (null !== $category) {
                return $category;
            }
        }

        if ('' !== $categoryName) {
            $category = $this->findByName($categoryName);
            if (null !== $category) {
                return $category;
            }
            try {
                return Category::create(
                    [
                        'user_id' => $this->user->id,
                        'name'    => $categoryName,
                    ]
                );
            } catch (QueryException $e) {
                Log::error($e->getMessage());
                throw new FireflyException('400003: Could not store new category.', 0, $e);
            }
        }

        return null;
    }

    /**
     * @param  User  $user
     */
    public function setUser(User $user): void
    {
        $this->user = $user;
    }
}