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<?php |
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declare(strict_types=1); |
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namespace GraphQL\Utils; |
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use GraphQL\Error\Error; |
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use GraphQL\Language\Printer; |
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use GraphQL\Type\Definition\Directive; |
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use GraphQL\Type\Definition\EnumType; |
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use GraphQL\Type\Definition\InputObjectType; |
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use GraphQL\Type\Definition\InterfaceType; |
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use GraphQL\Type\Definition\ObjectType; |
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use GraphQL\Type\Definition\ScalarType; |
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use GraphQL\Type\Definition\Type; |
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use GraphQL\Type\Definition\UnionType; |
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use GraphQL\Type\Introspection; |
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use GraphQL\Type\Schema; |
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use function array_filter; |
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use function array_keys; |
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use function array_map; |
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use function array_merge; |
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use function array_values; |
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use function count; |
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use function explode; |
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use function implode; |
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use function ksort; |
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use function mb_strlen; |
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use function preg_match_all; |
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use function sprintf; |
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use function str_replace; |
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use function strlen; |
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use function substr; |
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/** |
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* Given an instance of Schema, prints it in GraphQL type language. |
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*/ |
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class SchemaPrinter |
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{ |
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/** |
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* Accepts options as a second argument: |
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* |
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* - commentDescriptions: |
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* Provide true to use preceding comments as the description. |
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* @api |
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* @param bool[] $options |
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* @return string |
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*/ |
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public static function doPrint(Schema $schema, array $options = []) |
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{ |
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return self::printFilteredSchema( |
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$schema, |
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function ($type) { |
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return ! Directive::isSpecifiedDirective($type); |
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}, |
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function ($type) { |
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return ! Type::isBuiltInType($type); |
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}, |
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$options |
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); |
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} |
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/** |
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* @param bool[] $options |
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*/ |
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private static function printFilteredSchema(Schema $schema, $directiveFilter, $typeFilter, $options) |
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{ |
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$directives = array_filter( |
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$schema->getDirectives(), |
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function ($directive) use ($directiveFilter) { |
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return $directiveFilter($directive); |
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} |
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); |
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$types = $schema->getTypeMap(); |
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ksort($types); |
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$types = array_filter($types, $typeFilter); |
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return sprintf( |
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"%s\n", |
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implode( |
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"\n\n", |
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array_filter( |
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array_merge( |
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[self::printSchemaDefinition($schema)], |
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array_map( |
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function ($directive) use ($options) { |
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return self::printDirective($directive, $options); |
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}, |
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$directives |
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), |
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array_map( |
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function ($type) use ($options) { |
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return self::printType($type, $options); |
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}, |
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$types |
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) |
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) |
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) |
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) |
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); |
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} |
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private static function printSchemaDefinition(Schema $schema) |
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{ |
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if (self::isSchemaOfCommonNames($schema)) { |
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return; |
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} |
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$operationTypes = []; |
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$queryType = $schema->getQueryType(); |
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if ($queryType) { |
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$operationTypes[] = sprintf(' query: %s', $queryType->name); |
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} |
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$mutationType = $schema->getMutationType(); |
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if ($mutationType) { |
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$operationTypes[] = sprintf(' mutation: %s', $mutationType->name); |
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} |
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$subscriptionType = $schema->getSubscriptionType(); |
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if ($subscriptionType) { |
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$operationTypes[] = sprintf(' subscription: %s', $subscriptionType->name); |
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} |
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return sprintf("schema {\n%s\n}", implode("\n", $operationTypes)); |
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} |
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/** |
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* GraphQL schema define root types for each type of operation. These types are |
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* the same as any other type and can be named in any manner, however there is |
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* a common naming convention: |
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* |
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* schema { |
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* query: Query |
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* mutation: Mutation |
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* } |
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* |
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* When using this naming convention, the schema description can be omitted. |
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*/ |
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private static function isSchemaOfCommonNames(Schema $schema) |
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{ |
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$queryType = $schema->getQueryType(); |
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if ($queryType && $queryType->name !== 'Query') { |
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return false; |
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} |
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$mutationType = $schema->getMutationType(); |
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if ($mutationType && $mutationType->name !== 'Mutation') { |
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return false; |
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} |
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$subscriptionType = $schema->getSubscriptionType(); |
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if ($subscriptionType && $subscriptionType->name !== 'Subscription') { |
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return false; |
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} |
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return true; |
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} |
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private static function printDirective($directive, $options) |
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{ |
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return self::printDescription($options, $directive) . |
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'directive @' . $directive->name . self::printArgs($options, $directive->args) . |
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' on ' . implode(' | ', $directive->locations); |
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} |
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private static function printDescription($options, $def, $indentation = '', $firstInBlock = true) |
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{ |
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if (! $def->description) { |
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return ''; |
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} |
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$lines = self::descriptionLines($def->description, 120 - strlen($indentation)); |
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if (isset($options['commentDescriptions'])) { |
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return self::printDescriptionWithComments($lines, $indentation, $firstInBlock); |
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} |
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$description = ($indentation && ! $firstInBlock) |
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? "\n" . $indentation . '"""' |
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: $indentation . '"""'; |
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// In some circumstances, a single line can be used for the description. |
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if (count($lines) === 1 && |
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mb_strlen($lines[0]) < 70 && |
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substr($lines[0], -1) !== '"' |
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) { |
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return $description . self::escapeQuote($lines[0]) . "\"\"\"\n"; |
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} |
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// Format a multi-line block quote to account for leading space. |
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$hasLeadingSpace = isset($lines[0]) && |
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( |
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substr($lines[0], 0, 1) === ' ' || |
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substr($lines[0], 0, 1) === '\t' |
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); |
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if (! $hasLeadingSpace) { |
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$description .= "\n"; |
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} |
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$lineLength = count($lines); |
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for ($i = 0; $i < $lineLength; $i++) { |
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if ($i !== 0 || ! $hasLeadingSpace) { |
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$description .= $indentation; |
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} |
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$description .= self::escapeQuote($lines[$i]) . "\n"; |
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} |
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$description .= $indentation . "\"\"\"\n"; |
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return $description; |
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} |
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private static function descriptionLines($description, $maxLen) |
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{ |
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$lines = []; |
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$rawLines = explode("\n", $description); |
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foreach ($rawLines as $line) { |
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if ($line === '') { |
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$lines[] = $line; |
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} else { |
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// For > 120 character long lines, cut at space boundaries into sublines |
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// of ~80 chars. |
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$sublines = self::breakLine($line, $maxLen); |
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foreach ($sublines as $subline) { |
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$lines[] = $subline; |
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} |
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} |
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} |
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return $lines; |
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} |
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private static function breakLine($line, $maxLen) |
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{ |
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if (strlen($line) < $maxLen + 5) { |
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return [$line]; |
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} |
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preg_match_all('/((?: |^).{15,' . ($maxLen - 40) . '}(?= |$))/', $line, $parts); |
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$parts = $parts[0]; |
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return array_map('trim', $parts); |
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} |
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private static function printDescriptionWithComments($lines, $indentation, $firstInBlock) |
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{ |
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$description = $indentation && ! $firstInBlock ? "\n" : ''; |
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foreach ($lines as $line) { |
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if ($line === '') { |
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$description .= $indentation . "#\n"; |
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} else { |
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$description .= $indentation . '# ' . $line . "\n"; |
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} |
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} |
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return $description; |
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} |
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private static function escapeQuote($line) |
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{ |
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return str_replace('"""', '\\"""', $line); |
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} |
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private static function printArgs($options, $args, $indentation = '') |
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{ |
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if (! $args) { |
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return ''; |
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} |
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// If every arg does not have a description, print them on one line. |
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if (Utils::every( |
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$args, |
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function ($arg) { |
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return empty($arg->description); |
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} |
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)) { |
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return '(' . implode(', ', array_map('self::printInputValue', $args)) . ')'; |
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} |
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return sprintf( |
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"(\n%s\n%s)", |
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implode( |
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"\n", |
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array_map( |
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function ($arg, $i) use ($indentation, $options) { |
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return self::printDescription($options, $arg, ' ' . $indentation, ! $i) . ' ' . $indentation . |
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self::printInputValue($arg); |
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}, |
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$args, |
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array_keys($args) |
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) |
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), |
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$indentation |
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); |
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} |
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private static function printInputValue($arg) |
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{ |
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$argDecl = $arg->name . ': ' . (string) $arg->getType(); |
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if ($arg->defaultValueExists()) { |
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$argDecl .= ' = ' . Printer::doPrint(AST::astFromValue($arg->defaultValue, $arg->getType())); |
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} |
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return $argDecl; |
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} |
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/** |
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* @param bool[] $options |
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*/ |
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public static function printType(Type $type, array $options = []) |
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{ |
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if ($type instanceof ScalarType) { |
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return self::printScalar($type, $options); |
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} |
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if ($type instanceof ObjectType) { |
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return self::printObject($type, $options); |
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} |
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if ($type instanceof InterfaceType) { |
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return self::printInterface($type, $options); |
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} |
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if ($type instanceof UnionType) { |
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return self::printUnion($type, $options); |
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} |
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if ($type instanceof EnumType) { |
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return self::printEnum($type, $options); |
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} |
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if ($type instanceof InputObjectType) { |
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return self::printInputObject($type, $options); |
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} |
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throw new Error(sprintf('Unknown type: %s.', Utils::printSafe($type))); |
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} |
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/** |
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* @param bool[] $options |
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*/ |
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private static function printScalar(ScalarType $type, array $options) |
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{ |
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return sprintf('%sscalar %s', self::printDescription($options, $type), $type->name); |
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} |
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/** |
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* @param bool[] $options |
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*/ |
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private static function printObject(ObjectType $type, array $options) |
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{ |
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$interfaces = $type->getInterfaces(); |
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$implementedInterfaces = ! empty($interfaces) ? |
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' implements ' . implode( |
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', ', |
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array_map( |
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function ($i) { |
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return $i->name; |
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}, |
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5 |
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$interfaces |
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) |
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) : ''; |
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return self::printDescription($options, $type) . |
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sprintf("type %s%s {\n%s\n}", $type->name, $implementedInterfaces, self::printFields($options, $type)); |
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} |
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/** |
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* @param bool[] $options |
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*/ |
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51 |
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private static function printFields($options, $type) |
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{ |
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51 |
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$fields = array_values($type->getFields()); |
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|
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51 |
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return implode( |
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51 |
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"\n", |
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51 |
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array_map( |
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function ($f, $i) use ($options) { |
378
|
51 |
|
return self::printDescription($options, $f, ' ', ! $i) . ' ' . |
379
|
51 |
|
$f->name . self::printArgs($options, $f->args, ' ') . ': ' . |
380
|
51 |
|
(string) $f->getType() . self::printDeprecated($f); |
381
|
51 |
|
}, |
382
|
51 |
|
$fields, |
383
|
51 |
|
array_keys($fields) |
384
|
|
|
) |
385
|
|
|
); |
386
|
|
|
} |
387
|
|
|
|
388
|
51 |
|
private static function printDeprecated($fieldOrEnumVal) |
389
|
|
|
{ |
390
|
51 |
|
$reason = $fieldOrEnumVal->deprecationReason; |
391
|
51 |
|
if (empty($reason)) { |
392
|
51 |
|
return ''; |
393
|
|
|
} |
394
|
3 |
|
if ($reason === '' || $reason === Directive::DEFAULT_DEPRECATION_REASON) { |
395
|
1 |
|
return ' @deprecated'; |
396
|
|
|
} |
397
|
|
|
|
398
|
|
|
return ' @deprecated(reason: ' . |
399
|
3 |
|
Printer::doPrint(AST::astFromValue($reason, Type::string())) . ')'; |
400
|
|
|
} |
401
|
|
|
|
402
|
|
|
/** |
403
|
|
|
* @param bool[] $options |
404
|
|
|
*/ |
405
|
5 |
|
private static function printInterface(InterfaceType $type, array $options) |
406
|
|
|
{ |
407
|
5 |
|
return self::printDescription($options, $type) . |
408
|
5 |
|
sprintf("interface %s {\n%s\n}", $type->name, self::printFields($options, $type)); |
409
|
|
|
} |
410
|
|
|
|
411
|
|
|
/** |
412
|
|
|
* @param bool[] $options |
413
|
|
|
*/ |
414
|
5 |
|
private static function printUnion(UnionType $type, array $options) |
415
|
|
|
{ |
416
|
5 |
|
return self::printDescription($options, $type) . |
417
|
5 |
|
sprintf('union %s = %s', $type->name, implode(' | ', $type->getTypes())); |
418
|
|
|
} |
419
|
|
|
|
420
|
|
|
/** |
421
|
|
|
* @param bool[] $options |
422
|
|
|
*/ |
423
|
9 |
|
private static function printEnum(EnumType $type, array $options) |
424
|
|
|
{ |
425
|
9 |
|
return self::printDescription($options, $type) . |
426
|
9 |
|
sprintf("enum %s {\n%s\n}", $type->name, self::printEnumValues($type->getValues(), $options)); |
427
|
|
|
} |
428
|
|
|
|
429
|
|
|
/** |
430
|
|
|
* @param bool[] $options |
431
|
|
|
*/ |
432
|
9 |
|
private static function printEnumValues($values, $options) |
433
|
|
|
{ |
434
|
9 |
|
return implode( |
435
|
9 |
|
"\n", |
436
|
9 |
|
array_map( |
437
|
|
|
function ($value, $i) use ($options) { |
438
|
9 |
|
return self::printDescription($options, $value, ' ', ! $i) . ' ' . |
439
|
9 |
|
$value->name . self::printDeprecated($value); |
440
|
9 |
|
}, |
441
|
9 |
|
$values, |
442
|
9 |
|
array_keys($values) |
443
|
|
|
) |
444
|
|
|
); |
445
|
|
|
} |
446
|
|
|
|
447
|
|
|
/** |
448
|
|
|
* @param bool[] $options |
449
|
|
|
*/ |
450
|
3 |
|
private static function printInputObject(InputObjectType $type, array $options) |
451
|
|
|
{ |
452
|
3 |
|
$fields = array_values($type->getFields()); |
453
|
|
|
|
454
|
3 |
|
return self::printDescription($options, $type) . |
455
|
3 |
|
sprintf( |
456
|
3 |
|
"input %s {\n%s\n}", |
457
|
3 |
|
$type->name, |
458
|
3 |
|
implode( |
459
|
3 |
|
"\n", |
460
|
3 |
|
array_map( |
461
|
|
|
function ($f, $i) use ($options) { |
462
|
3 |
|
return self::printDescription($options, $f, ' ', ! $i) . ' ' . self::printInputValue($f); |
463
|
3 |
|
}, |
464
|
3 |
|
$fields, |
465
|
3 |
|
array_keys($fields) |
466
|
|
|
) |
467
|
|
|
) |
468
|
|
|
); |
469
|
|
|
} |
470
|
|
|
|
471
|
|
|
/** |
472
|
|
|
* @api |
473
|
|
|
* @param bool[] $options |
474
|
|
|
* @return string |
475
|
|
|
*/ |
476
|
2 |
|
public static function printIntrosepctionSchema(Schema $schema, array $options = []) |
477
|
|
|
{ |
478
|
2 |
|
return self::printFilteredSchema( |
479
|
2 |
|
$schema, |
480
|
2 |
|
[Directive::class, 'isSpecifiedDirective'], |
481
|
2 |
|
[Introspection::class, 'isIntrospectionType'], |
482
|
2 |
|
$options |
483
|
|
|
); |
484
|
|
|
} |
485
|
|
|
} |
486
|
|
|
|