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<?php |
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namespace Digia\GraphQL\Language; |
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use function Digia\GraphQL\Schema\escapeQuotes; |
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/** |
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* @param int $code |
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* @return string |
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*/ |
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function printCharCode(int $code): string |
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{ |
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if ($code === 0x0000) { |
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return '<EOF>'; |
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} |
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return $code < 0x007F |
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// Trust JSON for ASCII. |
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? \json_encode(\mb_chr($code, 'UTF-8')) |
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// Otherwise print the escaped form. |
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: '"\\u' . \dechex($code) . '"'; |
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} |
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/** |
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* @param string $string |
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* @param int $start |
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* @param int|null $end |
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* @return string |
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*/ |
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function sliceString(string $string, int $start, int $end = null): string |
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{ |
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$length = $end !== null ? $end - $start : \mb_strlen($string) - $start; |
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return \mb_substr($string, $start, $length); |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isLetter(int $code): bool |
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{ |
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return ($code >= 65 && $code <= 90) || ($code >= 97 && $code <= 122); // a-z or A-Z |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isNumber(int $code): bool |
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{ |
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return $code >= 48 && $code <= 57; // 0-9 |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isUnderscore(int $code): bool |
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{ |
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return $code === 95; // _ |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isAlphaNumeric(int $code): bool |
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{ |
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return isLetter($code) || isNumber($code) || isUnderscore($code); |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isLineTerminator(int $code): bool |
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{ |
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return $code === 0x000a || $code === 0x000d; |
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} |
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/** |
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* @param int $code |
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* @return bool |
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*/ |
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function isSourceCharacter(int $code): bool |
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{ |
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return $code < 0x0020 && $code !== 0x0009; // any source character EXCEPT HT (Horizontal Tab) |
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} |
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/** |
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* @param string $value |
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* @return bool |
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*/ |
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function isOperation(string $value): bool |
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{ |
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return $value === 'query' || $value === 'mutation' || $value === 'subscription'; |
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} |
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/** |
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* @param array $location |
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* @return array|null |
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*/ |
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function locationShorthandToArray(array $location): ?array |
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{ |
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return isset($location[0], $location[1]) ? ['line' => $location[0], 'column' => $location[1]] : null; |
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} |
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/** |
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* @param array $locations |
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* @return array |
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*/ |
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function locationsShorthandToArray(array $locations): array |
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{ |
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return array_map(function ($shorthand) { |
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return locationShorthandToArray($shorthand); |
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}, $locations); |
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} |
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/** |
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* @param array $array |
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* @return string |
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*/ |
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function block(array $array): string |
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{ |
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return !empty($array) ? "{\n" . indent(implode("\n", $array)) . "\n}" : ''; |
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} |
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/** |
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* @param string $start |
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* @param null|string $maybeString |
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* @param null|string $end |
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* @return string |
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*/ |
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function wrap(string $start, ?string $maybeString = null, ?string $end = null): string |
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{ |
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return null !== $maybeString ? ($start . $maybeString . ($end ?? '')) : ''; |
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} |
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/** |
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* @param null|string $maybeString |
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* @return string |
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*/ |
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function indent(?string $maybeString): string |
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{ |
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return null !== $maybeString ? ' ' . preg_replace("/\n/", "\n ", $maybeString) : ''; |
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} |
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/** |
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* @param string $str |
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* @return string |
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*/ |
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function dedent(string $str): string |
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{ |
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$trimmed = \preg_replace("/^\n*|[ \t]*$/", '', $str); // Remove leading newline and trailing whitespace |
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$matches = []; |
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\preg_match("/^[ \t]*/", $trimmed, $matches); // Figure out indent |
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$indent = $matches[0]; |
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return \str_replace($indent, '', $trimmed); // Remove indent |
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} |
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/** |
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* @param string $value |
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* @param string $indentation |
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* @param bool $preferMultipleLines |
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* @return string |
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*/ |
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function printBlockString(string $value, string $indentation = '', bool $preferMultipleLines = false): string { |
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$isSingleLine = false === \strpos($value, "\n"); |
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$hasLeadingSpace = $value[0] === ' ' || $value[0] === "\t"; |
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$hasTrailingQuote = $value[\strlen($value) - 1] === '"'; |
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$printAsMultipleLines = !$isSingleLine || $hasTrailingQuote || $preferMultipleLines; |
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$result = ''; |
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// Format a multi-line block quote to account for leading space. |
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if ($printAsMultipleLines && !($isSingleLine && $hasLeadingSpace)) { |
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$result .= "\n" . $indentation; |
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} |
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$result .= \strlen($indentation) > 0 |
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? \str_replace("\n", "\n" . $indentation, $value) |
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: $value; |
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if ($printAsMultipleLines) { |
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$result .= "\n"; |
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} |
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return '"""' . escapeQuotes($result) . '"""'; |
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} |
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