| Total Complexity | 72 |
| Total Lines | 244 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like CodePointString 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 CodePointString, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 25 | class CodePointString extends AbstractUnicodeString |
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| 26 | { |
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| 27 | public function __construct(string $string = '') |
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| 28 | { |
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| 29 | if ('' !== $string && !preg_match('//u', $string)) { |
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| 30 | throw new InvalidArgumentException('Invalid UTF-8 string.'); |
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| 31 | } |
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| 32 | |||
| 33 | $this->string = $string; |
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| 34 | } |
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| 35 | |||
| 36 | public function append(string ...$suffix): AbstractString |
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| 46 | } |
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| 47 | |||
| 48 | public function chunk(int $length = 1): array |
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| 49 | { |
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| 50 | if (1 > $length) { |
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| 51 | throw new InvalidArgumentException('The chunk length must be greater than zero.'); |
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| 52 | } |
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| 53 | |||
| 54 | if ('' === $this->string) { |
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| 55 | return []; |
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| 56 | } |
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| 57 | |||
| 58 | $rx = '/('; |
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| 59 | while (65535 < $length) { |
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| 60 | $rx .= '.{65535}'; |
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| 61 | $length -= 65535; |
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| 62 | } |
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| 63 | $rx .= '.{'.$length.'})/us'; |
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| 64 | |||
| 65 | $str = clone $this; |
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| 66 | $chunks = []; |
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| 67 | |||
| 68 | foreach (preg_split($rx, $this->string, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY) as $chunk) { |
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| 69 | $str->string = $chunk; |
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| 70 | $chunks[] = clone $str; |
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| 71 | } |
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| 72 | |||
| 73 | return $chunks; |
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| 74 | } |
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| 75 | |||
| 76 | public function codePointsAt(int $offset): array |
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| 81 | } |
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| 82 | |||
| 83 | public function endsWith($suffix): bool |
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| 84 | { |
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| 85 | if ($suffix instanceof AbstractString) { |
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| 86 | $suffix = $suffix->string; |
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| 87 | } elseif (\is_array($suffix) || $suffix instanceof \Traversable) { |
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| 88 | return parent::endsWith($suffix); |
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| 89 | } else { |
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| 90 | $suffix = (string) $suffix; |
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| 91 | } |
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| 92 | |||
| 93 | if ('' === $suffix || !preg_match('//u', $suffix)) { |
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| 94 | return false; |
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| 95 | } |
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| 96 | |||
| 97 | if ($this->ignoreCase) { |
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| 98 | return preg_match('{'.preg_quote($suffix).'$}iuD', $this->string); |
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| 99 | } |
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| 100 | |||
| 101 | return \strlen($this->string) >= \strlen($suffix) && 0 === substr_compare($this->string, $suffix, -\strlen($suffix)); |
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| 102 | } |
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| 103 | |||
| 104 | public function equalsTo($string): bool |
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| 119 | } |
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| 120 | |||
| 121 | public function indexOf($needle, int $offset = 0): ?int |
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| 122 | { |
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| 123 | if ($needle instanceof AbstractString) { |
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| 124 | $needle = $needle->string; |
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| 125 | } elseif (\is_array($needle) || $needle instanceof \Traversable) { |
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| 126 | return parent::indexOf($needle, $offset); |
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| 127 | } else { |
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| 128 | $needle = (string) $needle; |
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| 129 | } |
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| 130 | |||
| 131 | if ('' === $needle) { |
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| 132 | return null; |
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| 133 | } |
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| 134 | |||
| 135 | $i = $this->ignoreCase ? mb_stripos($this->string, $needle, $offset, 'UTF-8') : mb_strpos($this->string, $needle, $offset, 'UTF-8'); |
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| 136 | |||
| 137 | return false === $i ? null : $i; |
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| 138 | } |
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| 139 | |||
| 140 | public function indexOfLast($needle, int $offset = 0): ?int |
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| 141 | { |
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| 142 | if ($needle instanceof AbstractString) { |
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| 143 | $needle = $needle->string; |
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| 144 | } elseif (\is_array($needle) || $needle instanceof \Traversable) { |
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| 145 | return parent::indexOfLast($needle, $offset); |
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| 146 | } else { |
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| 147 | $needle = (string) $needle; |
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| 148 | } |
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| 149 | |||
| 150 | if ('' === $needle) { |
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| 151 | return null; |
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| 152 | } |
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| 153 | |||
| 154 | $i = $this->ignoreCase ? mb_strripos($this->string, $needle, $offset, 'UTF-8') : mb_strrpos($this->string, $needle, $offset, 'UTF-8'); |
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| 155 | |||
| 156 | return false === $i ? null : $i; |
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| 157 | } |
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| 158 | |||
| 159 | public function length(): int |
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| 160 | { |
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| 161 | return mb_strlen($this->string, 'UTF-8'); |
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| 162 | } |
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| 163 | |||
| 164 | public function prepend(string ...$prefix): AbstractString |
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| 165 | { |
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| 166 | $str = clone $this; |
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| 167 | $str->string = (1 >= \count($prefix) ? ($prefix[0] ?? '') : implode('', $prefix)).$this->string; |
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| 168 | |||
| 169 | if (!preg_match('//u', $str->string)) { |
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| 170 | throw new InvalidArgumentException('Invalid UTF-8 string.'); |
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| 171 | } |
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| 172 | |||
| 173 | return $str; |
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| 174 | } |
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| 175 | |||
| 176 | public function replace(string $from, string $to): AbstractString |
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| 195 | } |
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| 196 | |||
| 197 | public function slice(int $start = 0, int $length = null): AbstractString |
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| 198 | { |
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| 199 | $str = clone $this; |
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| 200 | $str->string = mb_substr($this->string, $start, $length, 'UTF-8'); |
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| 201 | |||
| 202 | return $str; |
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| 203 | } |
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| 204 | |||
| 205 | public function splice(string $replacement, int $start = 0, int $length = null): AbstractString |
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| 206 | { |
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| 207 | if (!preg_match('//u', $replacement)) { |
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| 208 | throw new InvalidArgumentException('Invalid UTF-8 string.'); |
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| 209 | } |
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| 210 | |||
| 211 | $str = clone $this; |
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| 212 | $start = $start ? \strlen(mb_substr($this->string, 0, $start, 'UTF-8')) : 0; |
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| 213 | $length = $length ? \strlen(mb_substr($this->string, $start, $length, 'UTF-8')) : $length; |
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| 214 | $str->string = substr_replace($this->string, $replacement, $start, $length ?? \PHP_INT_MAX); |
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| 215 | |||
| 216 | return $str; |
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| 217 | } |
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| 218 | |||
| 219 | public function split(string $delimiter, int $limit = null, int $flags = null): array |
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| 248 | } |
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| 249 | |||
| 250 | public function startsWith($prefix): bool |
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| 269 | } |
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| 270 | } |
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| 271 |