Railt\Compiler\Reader\BasePragmas

Complexity

Total Complexity

13

Size/Duplication

Total Lines	144
Duplicated Lines	0 %

Coupling/Cohesion

Components	2
Dependencies	3

Test Coverage

Coverage

0%

Importance

Changes

0

11 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	bootResolvers()	0	6	1
A	getParserResolver()	0	8	1
A	getLexerResolver()	0	6	1
A	getGrammarResolver()	0	6	1
A	getResolvers()	0	4	1
A	parser()	0	4	1
A	lexer()	0	4	1
A	grammar()	0	4	1
A	set()	0	8	2
A	verifyPragmaName()	0	13	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\Compiler\Reader;

use Railt\Compiler\Exception\UnknownPragmaException;
use Railt\Io\Readable;
use Railt\Lexer\TokenInterface;
use Railt\Parser\Configuration;

/**
 * Class BasePragmas
 */
abstract class BasePragmas implements ProvidePragmas
{
    /**
     * @var string
     */
    public const GROUP_PARSER = 'parser';

    /**
     * @var string
     */
    public const GROUP_LEXER = 'lexer';

    /**
     * @var string
     */
    public const GROUP_GRAMMAR = 'grammar';

    /**
     * @var array|Config[]
     */
    private $resolvers;

    /**
     * @var array
     */
    private $configs = [];

    /**
     * PragmaResolver constructor.
     */
    public function __construct()
    {
        $this->bootResolvers();
    }

    /**
     * @return void
     */
    private function bootResolvers(): void
    {
        $this->resolvers[self::GROUP_PARSER]  = $this->getParserResolver();
        $this->resolvers[self::GROUP_LEXER]   = $this->getLexerResolver();
        $this->resolvers[self::GROUP_GRAMMAR] = $this->getGrammarResolver();
    }

    /**
     * @return Config
     */
    private function getParserResolver(): Config
    {
        return new Config(self::GROUP_PARSER, [
            Configuration::PRAGMA_ROOT,
            Configuration::PRAGMA_LOOKAHEAD,
            Configuration::PRAGMA_RUNTIME,
        ]);
    }

    /**
     * @return Config
     */
    private function getLexerResolver(): Config
    {
        return new Config(self::GROUP_LEXER, [
            // TODO
        ]);
    }

    /**
     * @return Config
     */
    private function getGrammarResolver(): Config
    {
        return new Config(self::GROUP_GRAMMAR, [
            // TODO
        ]);
    }

    /**
     * @return iterable|Config[]
     */
    protected function getResolvers(): iterable
    {
        return $this->resolvers;
    }

    /**
     * @return array
     */
    public function parser(): array
    {
        return $this->resolvers[self::GROUP_GRAMMAR] ?? [];
    }

    /**
     * @return array
     */
    public function lexer(): array
    {
        return $this->resolvers[self::GROUP_LEXER] ?? [];
    }

    /**
     * @return array
     */
    public function grammar(): array
    {
        return $this->resolvers[self::GROUP_GRAMMAR] ?? [];
    }

    /**
     * @param string $group
     * @param string $name
     * @param string $value
     */
    protected function set(string $group, string $name, string $value): void
    {
        if (! \array_key_exists($group, $this->configs)) {
            $this->configs[$group] = [];
        }

        $this->configs[$group][$name] = $value;
    }

    /**
     * @param Readable $readable
     * @param TokenInterface $token
     * @param null|string $name
     * @return string
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    protected function verifyPragmaName(Readable $readable, TokenInterface $token, ?string $name): string
    {
        if ($name === null) {
            $error = \vsprintf('Unknown configuration pragma rule "%s" with value "%s"', [
                $token->value(1),
                $token->value(2),
            ]);

            throw (new UnknownPragmaException($error))->throwsIn($readable, $token->offset());
        }

        return $name;
    }
}