digiaonline /
graphql-php
| Total Complexity | 46 |
| Total Lines | 326 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like TokenReader often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use TokenReader, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 7 | class TokenReader implements TokenReaderInterface |
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| 8 | { |
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| 9 | protected const PATTERN_COMMENT = "/#[\u{0009}\u{0020}-\u{FFFF}]*/A"; |
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| 10 | protected const PATTERN_NAME = '/[_A-Za-z][_0-9A-Za-z]*/A'; |
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| 11 | protected const PATTERN_INT = '/((?!\.)(-?(0|[1-9][0-9]*)))+$/A'; |
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| 12 | protected const PATTERN_FLOAT = '/-?(0|[1-9][0-9]*)(\.[0-9]+)?((E|e)(\+|-)?[0-9]+)?/A'; |
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| 13 | protected const PATTERN_SPREAD = '/\.\.\./A'; |
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| 14 | protected const PATTERN_STRING = "/\"([^\"\\\u{000A}\u{000D}]|(\\([\u{0020}-\u{FFFF}]|[\"\\/bfnrt]))))*\"/As"; |
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| 15 | protected const PATTERN_BLOCK_STRING = '/"""("?"?(\\"""|\\(?!=""")|[^"\\]))*"""/As'; |
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| 16 | protected const PUNCTUATION = '!$&:=@|()[]{}'; |
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| 17 | |||
| 18 | /** |
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| 19 | * The lexer owning this token reader. |
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| 20 | * |
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| 21 | * @var LexerInterface |
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| 22 | */ |
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| 23 | protected $lexer; |
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| 24 | |||
| 25 | /** |
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| 26 | * @inheritdoc |
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| 27 | */ |
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| 28 | public function setLexer(LexerInterface $lexer) |
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| 29 | { |
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| 30 | $this->lexer = $lexer; |
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| 31 | return $this; |
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| 32 | } |
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| 33 | |||
| 34 | /** |
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| 35 | * @inheritdoc |
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| 36 | */ |
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| 37 | public function getLexer(): LexerInterface |
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| 38 | { |
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| 39 | return $this->lexer; |
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| 40 | } |
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| 41 | |||
| 42 | /** |
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| 43 | * @inheritdoc |
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| 44 | * @throws SyntaxErrorException |
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| 45 | */ |
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| 46 | public function read(string $body, int $pos, int $line, int $col, Token $prev): ?Token |
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| 47 | { |
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| 48 | if (false !== \strpos(self::PUNCTUATION, $body[$pos])) { |
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| 49 | return $this->createPunctuation($body, $pos, $line, $col, $prev); |
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| 50 | } |
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| 51 | |||
| 52 | if (\preg_match(static::PATTERN_COMMENT, $body, $match, null, $pos)) { |
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| 53 | return $this->createComment($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 54 | } |
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| 55 | |||
| 56 | if (\preg_match(static::PATTERN_NAME, $body, $match, null, $pos)) { |
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| 57 | return $this->createName($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 58 | } |
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| 59 | |||
| 60 | if (\preg_match(static::PATTERN_INT, $body, $match, null, $pos)) { |
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| 61 | return $this->createInt($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 62 | } |
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| 63 | |||
| 64 | if (\preg_match(static::PATTERN_FLOAT, $body, $match, null, $pos)) { |
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| 65 | return $this->createFloat($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 66 | } |
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| 67 | |||
| 68 | if (\preg_match(static::PATTERN_SPREAD, $body, $match, null, $pos)) { |
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| 69 | return $this->createSpread($pos, $pos + 3, $line, $col, $prev); |
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| 70 | } |
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| 71 | |||
| 72 | if (\preg_match(static::PATTERN_STRING, $body, $match, null, $pos)) { |
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| 73 | return $this->createString($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 74 | } |
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| 75 | |||
| 76 | if (\preg_match(static::PATTERN_BLOCK_STRING, $body, $match, null, $pos)) { |
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| 77 | return $this->createBlockString($pos, $pos + \mb_strlen($match[0]), $line, $col, $prev, $match[0]); |
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| 78 | } |
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| 79 | |||
| 80 | return null; |
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| 81 | } |
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| 82 | |||
| 83 | /** |
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| 84 | * @param string $kind |
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| 85 | * @param int $start |
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| 86 | * @param int $line |
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| 87 | * @param int $col |
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| 88 | * @param Token $prev |
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| 89 | * @param null|string $value |
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| 90 | * @return Token |
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| 91 | */ |
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| 92 | protected function createToken( |
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| 93 | string $kind, |
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| 94 | int $start, |
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| 95 | int $end, |
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| 96 | int $line, |
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| 97 | int $col, |
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| 98 | Token $prev, |
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| 99 | ?string $value = null |
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| 100 | ): Token { |
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| 101 | return new Token($kind, $start, $end, $line, $col, $prev, $value); |
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| 102 | } |
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| 103 | |||
| 104 | /** |
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| 105 | * @param string $body |
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| 106 | * @param int $pos |
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| 107 | * @param int $line |
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| 108 | * @param int $col |
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| 109 | * @param Token $prev |
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| 110 | * @return Token |
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| 111 | */ |
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| 112 | protected function createPunctuation(string $body, int $pos, int $line, int $col, Token $prev): Token |
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| 113 | { |
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| 114 | $code = \ord($body[$pos]); |
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| 115 | |||
| 116 | switch ($code) { |
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| 117 | case 33: // ! |
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| 118 | return $this->createBang($pos, $line, $col, $prev); |
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| 119 | case 36: // $ |
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| 120 | return $this->createDollar($pos, $line, $col, $prev); |
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| 121 | case 38: // & |
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| 122 | return $this->createAmp($pos, $line, $col, $prev); |
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| 123 | case 58: // : |
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| 124 | return $this->createColon($pos, $line, $col, $prev); |
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| 125 | case 61: // = |
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| 126 | return $this->createEquals($pos, $line, $col, $prev); |
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| 127 | case 64: // @ |
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| 128 | return $this->createAt($pos, $line, $col, $prev); |
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| 129 | case 124: // | |
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| 130 | return $this->createPipe($pos, $line, $col, $prev); |
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| 131 | case 40: |
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| 132 | case 41: // ( or )~ |
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| 133 | return $this->createParenthesis($code, $pos, $line, $col, $prev); |
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| 134 | case 91: |
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| 135 | case 93: // [ or ] |
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| 136 | return $this->createBracket($code, $pos, $line, $col, $prev); |
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| 137 | case 123: |
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| 138 | case 125: // { or } |
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| 139 | return $this->createBrace($code, $pos, $line, $col, $prev); |
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| 140 | } |
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| 141 | } |
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| 142 | |||
| 143 | /** |
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| 144 | * @param int $pos |
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| 145 | * @param int $line |
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| 146 | * @param int $col |
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| 147 | * @param Token $prev |
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| 148 | * @return Token |
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| 149 | */ |
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| 150 | protected function createColon(int $pos, int $line, int $col, Token $prev): Token |
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| 151 | { |
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| 152 | return new Token(TokenKindEnum::COLON, $pos, $pos + 1, $line, $col, $prev); |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * @param int $pos |
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| 157 | * @param int $line |
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| 158 | * @param int $col |
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| 159 | * @param Token $prev |
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| 160 | * @return Token |
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| 161 | */ |
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| 162 | protected function createAmp(int $pos, int $line, int $col, Token $prev): Token |
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| 163 | { |
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| 164 | return new Token(TokenKindEnum::AMP, $pos, $pos + 1, $line, $col, $prev); |
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| 165 | } |
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| 166 | |||
| 167 | /** |
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| 168 | * @param int $pos |
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| 169 | * @param int $line |
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| 170 | * @param int $col |
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| 171 | * @param Token $prev |
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| 172 | * @return Token |
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| 173 | */ |
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| 174 | protected function createBang(int $pos, int $line, int $col, Token $prev): Token |
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| 175 | { |
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| 176 | return new Token(TokenKindEnum::BANG, $pos, $pos + 1, $line, $col, $prev); |
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| 177 | } |
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| 178 | |||
| 179 | /** |
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| 180 | * @param int $code |
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| 181 | * @param int $pos |
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| 182 | * @param int $line |
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| 183 | * @param int $col |
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| 184 | * @param Token $prev |
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| 185 | * @return Token |
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| 186 | */ |
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| 187 | protected function createBrace(int $code, int $pos, int $line, int $col, Token $prev): Token |
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| 188 | { |
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| 189 | return $code === 123 |
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| 190 | ? new Token(TokenKindEnum::BRACE_L, $pos, $pos + 1, $line, $col, $prev) |
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| 191 | : new Token(TokenKindEnum::BRACE_R, $pos, $pos + 1, $line, $col, $prev); |
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| 192 | } |
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| 193 | |||
| 194 | /** |
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| 195 | * @param int $code |
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| 196 | * @param int $pos |
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| 197 | * @param int $line |
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| 198 | * @param int $col |
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| 199 | * @param Token $prev |
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| 200 | * @return Token |
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| 201 | */ |
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| 202 | protected function createBracket(int $code, int $pos, int $line, int $col, Token $prev): Token |
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| 203 | { |
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| 204 | return $code === 91 |
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| 205 | ? new Token(TokenKindEnum::BRACKET_L, $pos, $pos + 1, $line, $col, $prev) |
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| 206 | : new Token(TokenKindEnum::BRACKET_R, $pos, $pos + 1, $line, $col, $prev); |
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| 207 | } |
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| 208 | |||
| 209 | /** |
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| 210 | * @param int $pos |
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| 211 | * @param int $line |
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| 212 | * @param int $col |
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| 213 | * @param Token $prev |
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| 214 | * @return Token |
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| 215 | */ |
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| 216 | protected function createDollar(int $pos, int $line, int $col, Token $prev): Token |
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| 217 | { |
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| 218 | return new Token(TokenKindEnum::DOLLAR, $pos, $pos + 1, $line, $col, $prev); |
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| 219 | } |
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| 220 | |||
| 221 | /** |
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| 222 | * @param int $pos |
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| 223 | * @param int $line |
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| 224 | * @param int $col |
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| 225 | * @param Token $prev |
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| 226 | * @return Token |
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| 227 | */ |
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| 228 | protected function createPipe(int $pos, int $line, int $col, Token $prev): Token |
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| 229 | { |
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| 230 | return new Token(TokenKindEnum::PIPE, $pos, $pos + 1, $line, $col, $prev); |
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| 231 | } |
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| 232 | |||
| 233 | /** |
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| 234 | * @param int $code |
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| 235 | * @param int $pos |
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| 236 | * @param int $line |
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| 237 | * @param int $col |
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| 238 | * @param Token $prev |
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| 239 | * @return Token |
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| 240 | */ |
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| 241 | protected function createParenthesis(int $code, int $pos, int $line, int $col, Token $prev): Token |
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| 242 | { |
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| 243 | return $code === 40 |
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| 244 | ? new Token(TokenKindEnum::PAREN_L, $pos, $pos + 1, $line, $col, $prev) |
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| 245 | : new Token(TokenKindEnum::PAREN_R, $pos, $pos + 1, $line, $col, $prev); |
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| 246 | } |
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| 247 | |||
| 248 | /** |
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| 249 | * @param int $pos |
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| 250 | * @param int $line |
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| 251 | * @param int $col |
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| 252 | * @param Token $prev |
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| 253 | * @return Token |
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| 254 | */ |
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| 255 | protected function createEquals(int $pos, int $line, int $col, Token $prev): Token |
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| 256 | { |
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| 257 | return new Token(TokenKindEnum::EQUALS, $pos, $pos + 1, $line, $col, $prev); |
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| 258 | } |
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| 259 | |||
| 260 | /** |
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| 261 | * @param int $pos |
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| 262 | * @param int $line |
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| 263 | * @param int $col |
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| 264 | * @param Token $prev |
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| 265 | * @return Token |
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| 266 | */ |
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| 267 | protected function createAt(int $pos, int $line, int $col, Token $prev): Token |
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| 268 | { |
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| 269 | return new Token(TokenKindEnum::AT, $pos, $pos + 1, $line, $col, $prev); |
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| 270 | } |
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| 271 | |||
| 272 | /** |
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| 273 | * @param array ...$args |
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| 274 | * @return Token |
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| 275 | */ |
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| 276 | protected function createComment(...$args): Token |
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| 277 | { |
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| 278 | return $this->createToken(TokenKindEnum::COMMENT, ...$args); |
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| 279 | } |
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| 280 | |||
| 281 | /** |
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| 282 | * @param array ...$args |
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| 283 | * @return Token |
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| 284 | */ |
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| 285 | protected function createName(...$args): Token |
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| 286 | { |
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| 287 | return $this->createToken(TokenKindEnum::NAME, ...$args); |
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| 288 | } |
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| 289 | |||
| 290 | /** |
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| 291 | * @param array ...$args |
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| 292 | * @return Token |
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| 293 | */ |
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| 294 | protected function createInt(...$args): Token |
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| 295 | { |
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| 296 | return $this->createToken(TokenKindEnum::INT, ...$args); |
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| 297 | } |
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| 298 | |||
| 299 | /** |
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| 300 | * @param array ...$args |
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| 301 | * @return Token |
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| 302 | */ |
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| 303 | protected function createFloat(...$args): Token |
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| 304 | { |
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| 305 | return $this->createToken(TokenKindEnum::FLOAT, ...$args); |
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| 306 | } |
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| 307 | |||
| 308 | /** |
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| 309 | * @param array ...$args |
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| 310 | * @return Token |
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| 311 | */ |
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| 312 | protected function createSpread(...$args): Token |
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| 315 | } |
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| 316 | |||
| 317 | /** |
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| 318 | * @param array ...$args |
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| 319 | * @return Token |
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| 320 | */ |
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| 321 | protected function createString(...$args): Token |
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| 322 | { |
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| 323 | return $this->createToken(TokenKindEnum::STRING, ...$args); |
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| 324 | } |
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| 325 | |||
| 326 | /** |
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| 327 | * @param array ...$args |
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| 328 | * @return Token |
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| 329 | */ |
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| 330 | protected function createBlockString(...$args): Token |
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| 331 | { |
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| 332 | return $this->createToken(TokenKindEnum::BLOCK_STRING, ...$args); |
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| 333 | } |
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| 334 | |||
| 335 | // /** |
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| 336 | // * @param string $body |
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| 603 |
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