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<?php |
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namespace Digia\GraphQL\Error; |
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use Digia\GraphQL\Language\Source; |
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use Digia\GraphQL\Language\SourceLocation; |
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/** |
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* @param GraphQLException $error |
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* @return string |
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*/ |
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function printError(GraphQLException $error): string |
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{ |
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$printedLocations = []; |
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$nodes = $error->getNodes(); |
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if (!empty($nodes)) { |
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foreach ($nodes as $node) { |
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$location = $node->getLocation(); |
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if (null !== $location) { |
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$printedLocations[] = highlightSourceAtLocation( |
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$location->getSource(), |
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SourceLocation::fromSource($location->getSource(), $location->getStart()) |
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); |
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} |
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} |
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} elseif ($error->hasSource() && $error->hasLocations()) { |
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foreach ($error->getLocations() as $location) { |
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$printedLocations[] = highlightSourceAtLocation($error->getSource(), $location); |
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} |
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} |
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return empty($printedLocations) |
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? $error->getMessage() |
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: implode("\n\n", array_merge([$error->getMessage()], $printedLocations)) . "\n"; |
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} |
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/** |
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* @param Source $source |
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* @param SourceLocation $location |
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* @return string |
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*/ |
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function highlightSourceAtLocation(Source $source, SourceLocation $location): string |
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{ |
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$line = $location->getLine(); |
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$locationOffset = $source->getLocationOffset(); |
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$lineOffset = $locationOffset->getLine() - 1; |
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$columnOffset = getColumnOffset($source, $location); |
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$contextLine = $line + $lineOffset; |
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$contextColumn = $location->getColumn() + $columnOffset; |
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$prevLineNum = (string)($contextLine - 1); |
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$lineNum = (string)$contextLine; |
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$nextLineNum = (string)($contextLine + 1); |
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$padLen = mb_strlen($nextLineNum); |
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$lines = preg_split("/\r\n|[\n\r]/", $source->getBody()); |
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$lines[0] = whitespace($locationOffset->getColumn() - 1) . $lines[0]; |
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$outputLines = [ |
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sprintf('%s (%s:%s)', $source->getName(), $contextLine, $contextColumn), |
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$line >= 2 ? leftPad($padLen, $prevLineNum) . ': ' . $lines[$line - 2] : null, |
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leftPad($padLen, $lineNum) . ': ' . $lines[$line - 1], |
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whitespace(2 + $padLen + $contextColumn - 1) . '^', |
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$line < \count($lines) ? leftPad($padLen, $nextLineNum) . ': ' . $lines[$line] : null, |
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]; |
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return implode("\n", array_filter($outputLines, function ($line) { |
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return null !== $line; |
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})); |
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} |
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/** |
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* @param Source $source |
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* @param SourceLocation $location |
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* @return int |
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*/ |
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function getColumnOffset(Source $source, SourceLocation $location): int |
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{ |
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return $location->getLine() === 1 ? $source->getLocationOffset()->getColumn() - 1 : 0; |
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} |
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/** |
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* @param int $length |
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* @return string |
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*/ |
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function whitespace(int $length): string |
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{ |
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return str_repeat(' ', $length); |
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} |
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/** |
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* @param int $length |
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* @param string $str |
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* @return string |
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*/ |
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function leftPad(int $length, string $str): string |
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{ |
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return whitespace($length - mb_strlen($str)) . $str; |
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} |
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digiaonline /
graphql-php
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