Application\Api\Field\Standard

Complexity

Total Complexity

24

Size/Duplication

Total Lines	326
Duplicated Lines	0 %

Test Coverage

Coverage

84.91%

Importance

Changes	2
Bugs	0	Features	0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	makePlural()	0	7	1
A	getSingleArguments()	0	7	1
A	filterInput()	0	9	4
A	getDefaultSorting()	0	17	3
A	buildMutation()	0	74	2
A	buildQuery()	0	36	1
A	createFilteredQueryBuilder()	0	19	2
A	buildRelationMutation()	0	69	4
A	customTypesToScalar()	0	11	4
A	getListArguments()	0	19	2

<?php

declare(strict_types=1);

namespace Application\Api\Field;

use Application\Api\Helper;
use Application\Model\AbstractModel;
use Application\Model\Account;
use Application\Model\Bookable;
use Application\Model\TransactionLine;
use Application\Model\User;
use Doctrine\ORM\QueryBuilder;
use Ecodev\Felix\Api\Input\PaginationInputType;
use GraphQL\Type\Definition\Type;
use Money\Money;
use ReflectionClass;

/**
 * Provide easy way to build standard fields to query and mutate objects
 */
abstract class Standard
{
    /**
     * Returns standard fields to query the object
     */
    public static function buildQuery(string $class): array
    {
        $metadata = _em()->getClassMetadata($class);
        $reflect = $metadata->getReflectionClass();
        $name = lcfirst($reflect->getShortName());
        $shortName = $reflect->getShortName();
        $plural = self::makePlural($name);

        $listArgs = self::getListArguments($class);
        $singleArgs = self::getSingleArguments($class);

        return [
            [
                'name' => $plural,
                'type' => Type::nonNull(_types()->get($shortName . 'Pagination')),
                'args' => $listArgs,
                'resolve' => function ($root, array $args) use ($class): array {
                    $qb = self::createFilteredQueryBuilder($class, $args);

                    $items = Helper::paginate($args['pagination'], $qb);
                    $aggregatedFields = Helper::aggregatedFields($class, $qb);
                    $result = array_merge($aggregatedFields, $items);

                    return $result;
                },
            ],
            [
                'name' => $name,
                'type' => Type::nonNull(_types()->getOutput($class)),
                'args' => $singleArgs,
                'resolve' => function ($root, array $args): ?AbstractModel {
                    $object = $args['id']->getEntity();

                    Helper::throwIfDenied($object, 'read');

                    return $object;
                },
            ],
        ];
    }

    /**
     * Returns standard fields to mutate the object
     */
    public static function buildMutation(string $class): array
    {
        $reflect = new ReflectionClass($class);
        $name = $reflect->getShortName();
        $plural = self::makePlural($name);

        return [
            [
                'name' => 'create' . $name,
                'type' => Type::nonNull(_types()->getOutput($class)),
                'description' => 'Create a new ' . $name,
                'args' => [
                    'input' => Type::nonNull(_types()->getInput($class)),
                ],
                'resolve' => function ($root, array $args) use ($class): AbstractModel {
                    // Do it
                    $object = new $class();
                    $input = $args['input'];
                    Helper::hydrate($object, $input);

                    // Check ACL
                    Helper::throwIfDenied($object, 'create');

                    _em()->persist($object);
                    _em()->flush();

                    return $object;
                },
            ],
            [
                'name' => 'update' . $name,
                'type' => Type::nonNull(_types()->getOutput($class)),
                'description' => 'Update an existing ' . $name,
                'args' => [
                    'id' => Type::nonNull(_types()->getId($class)),
                    'input' => Type::nonNull(_types()->getPartialInput($class)),
                ],
                'resolve' => function ($root, array $args) use ($class): AbstractModel {
                    $object = $args['id']->getEntity();

                    // Check ACL
                    Helper::throwIfDenied($object, 'update');

                    // Do it
                    $input = $args['input'];
                    $filteredInput = self::filterInput($class, $input);
                    Helper::hydrate($object, $filteredInput);

                    _em()->flush();

                    return $object;
                },
            ],
            [
                'name' => 'delete' . $plural,
                'type' => Type::nonNull(Type::boolean()),
                'description' => 'Delete one or several existing ' . $name,
                'args' => [
                    'ids' => Type::nonNull(Type::listOf(Type::nonNull(_types()->getId($class)))),
                ],
                'resolve' => function ($root, array $args): bool {
                    foreach ($args['ids'] as $id) {
                        $object = $id->getEntity();

                        // Check ACL
                        Helper::throwIfDenied($object, 'delete');

                        // Do it
                        _em()->remove($object);
                    }

                    _em()->flush();

                    return true;
                },
            ],
        ];
    }

    private static function filterInput(string $class, array $input): array
    {
        $user = User::getCurrent();
        if ($class === Bookable::class && $user && $user->getRole() === User::ROLE_TRAINER) {
            // whitelist
            $input = array_intersect_key($input, array_flip(['remarks']));
        }

        return $input;
    }

    /**
     * Returns standard mutations to manage many-to-many relations between two given class
     *
     * @param string $ownerClass The class owning the relation
     * @param string $otherClass The other class, not-owning the relation
     * @param null|string $otherName a specific semantic, if needed, to be use as adder. If `$otherName = 'Parent'`, then we will call `addParent()`
     */
    public static function buildRelationMutation(string $ownerClass, string $otherClass, ?string $otherName = null): array
    {
        $ownerReflect = new ReflectionClass($ownerClass);
        $ownerName = $ownerReflect->getShortName();
        $lowerOwnerName = lcfirst($ownerName);

        $otherReflect = new ReflectionClass($otherClass);
        $otherClassName = $otherReflect->getShortName();
        if ($otherName) {
            $semantic = ' as ' . $otherName;
        } else {
            $semantic = '';
            $otherName = $otherClassName;
        }
        $lowerOtherName = lcfirst($otherName);

        if ($lowerOwnerName === $lowerOtherName) {
            $lowerOwnerName .= 1;
            $lowerOtherName .= 2;
        }

        $args = [
            $lowerOwnerName => Type::nonNull(_types()->getId($ownerClass)),
            $lowerOtherName => Type::nonNull(_types()->getId($otherClass)),
        ];

        return [
            [
                'name' => 'link' . $ownerName . $otherName,
                'type' => Type::nonNull(_types()->getOutput($ownerClass)),
                'description' => 'Create a relation between ' . $ownerName . ' and ' . $otherClassName . $semantic . '.' . PHP_EOL . PHP_EOL .
                    'If the relation already exists, it will have no effect.',
                'args' => $args,
                'resolve' => function ($root, array $args) use ($lowerOwnerName, $lowerOtherName, $otherName): AbstractModel {
                    $owner = $args[$lowerOwnerName]->getEntity();
                    $other = $args[$lowerOtherName]->getEntity();

                    // Check ACL
                    Helper::throwIfDenied($owner, 'update');

                    // Do it
                    $method = 'add' . $otherName;
                    $owner->$method($other);
                    _em()->flush();

                    return $owner;
                },
            ],
            [
                'name' => 'unlink' . $ownerName . $otherName,
                'type' => Type::nonNull(_types()->getOutput($ownerClass)),
                'description' => 'Delete a relation between ' . $ownerName . ' and ' . $otherClassName . $semantic . '.' . PHP_EOL . PHP_EOL .
                    'If the relation does not exist, it will have no effect.',
                'args' => $args,
                'resolve' => function ($root, array $args) use ($lowerOwnerName, $lowerOtherName, $otherName): AbstractModel {
                    $owner = $args[$lowerOwnerName]->getEntity();
                    $other = $args[$lowerOtherName]->getEntity();

                    // Check ACL
                    Helper::throwIfDenied($owner, 'update');

                    // Do it
                    if ($other) {
                        $method = 'remove' . $otherName;
                        $owner->$method($other);
                        _em()->flush();
                    }

                    return $owner;
                },
            ],
        ];
    }

    /**
     * Returns the plural form of the given name
     */
    private static function makePlural(string $name): string
    {
        $plural = $name . 's';
        $plural = preg_replace('/ys$/', 'ies', $plural);
        $plural = preg_replace('/ss$/', 'ses', $plural);

        return $plural;
    }

    /**
     * Return arguments used for the list
     */
    public static function getListArguments(string $class, bool $includePagination = true): array
    {
        $listArgs = [
            [
                'name' => 'filter',
                'type' => _types()->getFilter($class),
            ],
            [
                'name' => 'sorting',
                'type' => _types()->getSorting($class),
                'defaultValue' => self::getDefaultSorting($class),
            ],
        ];

        if ($includePagination) {
            $listArgs[] = PaginationInputType::build(_types());
        }

        return $listArgs;
    }

    /**
     * Return arguments used for single item
     */
    private static function getSingleArguments(string $class): array
    {
        $args = [
            'id' => Type::nonNull(_types()->getId($class)),
        ];

        return $args;
    }

    /**
     * Get default sorting values with some fallback for some special cases
     */
    private static function getDefaultSorting(string $class): array
    {
        $defaultSorting = [];

        if ($class === Account::class) {
            $defaultSorting[] = [
                'field' => 'code',
                'order' => 'ASC',
            ];
        } elseif ($class === TransactionLine::class) {
            $defaultSorting[] = [
                'field' => 'transactionDate',
                'order' => 'DESC',
            ];
        }

        return $defaultSorting;
    }

    /**
     * Recursively convert custom scalars that don't implement __toString() to their scalar
     * representation to injected back into DQL/SQL
     */
    private static function customTypesToScalar(array $args): array
    {
        foreach ($args as &$p) {
            if (is_array($p)) {
                $p = self::customTypesToScalar($p);
            } elseif ($p instanceof Money) {
                $p = $p->getAmount();
            }
        }

        return $args;
    }

    public static function createFilteredQueryBuilder(string $class, array $args): QueryBuilder
    {
        $filters = self::customTypesToScalar($args['filter'] ?? []);

        // If null or empty list is provided by client, fallback on default sorting
        $sorting = $args['sorting'] ?? [];
        if (!$sorting) {
            $sorting = self::getDefaultSorting($class);
        }

        // And **always** sort by ID
        $sorting[] = [
            'field' => 'id',
            'order' => 'ASC',
        ];

        $qb = _types()->createFilteredQueryBuilder($class, $filters, $sorting);

        return $qb;
    }
}