Railt\SDL\Compiler\Factory

Complexity

Total Complexity

9

Size/Duplication

Total Lines	104
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	8

Test Coverage

Coverage

84.62%

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
B	process()	0	27	6
A	build()	0	14	2

<?php
/**
 * This file is part of Railt package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace Railt\SDL\Compiler;

use Railt\Parser\Ast\RuleInterface;
use Railt\Reflection\Contracts\Definition as DefinitionInterface;
use Railt\Reflection\Contracts\Definition\TypeDefinition;
use Railt\Reflection\Contracts\Invocation\DirectiveInvocation;
use Railt\Reflection\Document;
use Railt\SDL\Compiler\Builder\BuilderInterface;
use Railt\SDL\Compiler\Builder\Definition;
use Railt\SDL\Compiler\Builder\Dependent;
use Railt\SDL\Compiler\Builder\Invocation;
use Railt\SDL\Exception\CompilerException;
use Railt\SDL\Exception\TypeConflictException;

/**
 * Class Factory
 */
class Factory
{
    /**
     * @var BuilderInterface[]
     */
    private const NODE_MAPPINGS = [
        'DirectiveDefinition'  => Definition\DirectiveBuilder::class,
        'EnumDefinition'       => Definition\EnumBuilder::class,
        'InputDefinition'      => Definition\InputBuilder::class,
        'InputUnionDefinition' => Definition\InputUnionBuilder::class,
        'InterfaceDefinition'  => Definition\InterfaceBuilder::class,
        'ObjectDefinition'     => Definition\ObjectBuilder::class,
        'ScalarDefinition'     => Definition\ScalarBuilder::class,
        'SchemaDefinition'     => Definition\SchemaBuilder::class,
        'UnionDefinition'      => Definition\UnionBuilder::class,

        'FieldDefinition'      => Dependent\FieldBuilder::class,
        'ArgumentDefinition'   => Dependent\ArgumentBuilder::class,
        'EnumValue'            => Dependent\EnumValueBuilder::class,
        'InputFieldDefinition' => Dependent\InputFieldBuilder::class,

        'Directive' => Invocation\DirectiveBuilder::class,
    ];

    /**
     * @var Pipeline
     */
    private $pipeline;

    /**
     * @var Document
     */
    private $document;

    /**
     * @var RuleInterface
     */
    private $ast;

    /**
     * Processor constructor.
     * @param Document $document
     * @param RuleInterface $ast
     */
    public function __construct(Document $document, RuleInterface $ast)
    {
        $this->ast      = $ast;
        $this->document = $document;
        $this->pipeline = new Pipeline();
    }

    /**
     * @return Document
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    public function process(): Document
    {
        $dictionary = $this->document->getDictionary();

        foreach ($this->ast as $child) {
            $definition = $this->build($child, $this->document);

            if ($definition instanceof TypeDefinition) {
                if ($dictionary->has($definition->getName())) {
                    $error = \sprintf('Can not redeclare already registered type %s', $definition);
                    throw (new TypeConflictException($error))->in($definition);
                }

                $this->document->withDefinition($definition);
            }

            if ($definition instanceof DirectiveInvocation) {
                $this->document->withDirective($definition);
            }
        }

        foreach ($this->pipeline as $next) {
            $next();
        }

        return $this->document;
    }

    /**
     * @param RuleInterface $rule
     * @param DefinitionInterface $parent
     * @return DefinitionInterface
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    public function build(RuleInterface $rule, DefinitionInterface $parent): DefinitionInterface
    {
        $mapping = self::NODE_MAPPINGS[$rule->getName()] ?? null;

        if ($mapping === null) {
            throw (new CompilerException(\sprintf('No mappings found for %s AST',
                $rule->getName())))->throwsIn($this->document->getFile(), $rule->getOffset());
        }

        /** @var BuilderInterface $instance */
        $instance = new $mapping($this->pipeline, $this);

        return $instance->build($rule, $parent);
    }
}