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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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* |
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* @param bool[] $options |
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* |
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* @api |
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*/ |
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public static function doPrint(Schema $schema, array $options = []) : string |
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{ |
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return self::printFilteredSchema( |
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$schema, |
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static function ($type) { |
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return ! Directive::isSpecifiedDirective($type); |
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}, |
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static 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, $options) : string |
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{ |
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$directives = array_filter( |
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$schema->getDirectives(), |
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static function ($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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static 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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static 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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return ! $subscriptionType || $subscriptionType->name === 'Subscription'; |
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} |
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private static function printDirective($directive, $options) : string |
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{ |
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return self::printDescription($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) : string |
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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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/** |
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* @return string[] |
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*/ |
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private static function descriptionLines(string $description, int $maxLen) : array |
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{ |
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$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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/** |
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* @return string[] |
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*/ |
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private static function breakLine(string $line, int $maxLen) : array |
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{ |
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if (strlen($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, $firstInBlock) : string |
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{ |
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$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) : string |
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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 = '') : string |
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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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static 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', $args)) . ')'; |
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} |
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return sprintf( |
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"(\n%s\n%s)", |
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implode( |
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"\n", |
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array_map( |
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static function ($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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$args, |
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4 |
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array_keys($args) |
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) |
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), |
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$indentation |
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); |
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} |
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300
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private static function printInputValue($arg) : string |
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{ |
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79 |
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$argDecl = $arg->name . ': ' . (string) $arg->getType(); |
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79 |
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if ($arg->defaultValueExists()) { |
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10 |
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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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*/ |
313
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109 |
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public static function printType(Type $type, array $options = []) : string |
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{ |
315
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109 |
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if ($type instanceof ScalarType) { |
316
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59 |
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return self::printScalar($type, $options); |
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} |
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319
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109 |
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if ($type instanceof ObjectType) { |
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109 |
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return self::printObject($type, $options); |
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} |
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323
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75 |
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if ($type instanceof InterfaceType) { |
324
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return self::printInterface($type, $options); |
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} |
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327
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71 |
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if ($type instanceof UnionType) { |
328
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60 |
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return self::printUnion($type, $options); |
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} |
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331
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67 |
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if ($type instanceof EnumType) { |
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65 |
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return self::printEnum($type, $options); |
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} |
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335
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58 |
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if ($type instanceof InputObjectType) { |
336
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return self::printInputObject($type, $options); |
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} |
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339
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throw new Error(sprintf('Unknown type: %s.', Utils::printSafe($type))); |
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} |
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/** |
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* @param bool[] $options |
344
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*/ |
345
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59 |
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private static function printScalar(ScalarType $type, array $options) : string |
346
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{ |
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59 |
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return sprintf('%sscalar %s', self::printDescription($options, $type), $type->name); |
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} |
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/** |
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* @param bool[] $options |
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*/ |
353
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109 |
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private static function printObject(ObjectType $type, array $options) : string |
354
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{ |
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109 |
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$interfaces = $type->getInterfaces(); |
356
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109 |
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$implementedInterfaces = ! empty($interfaces) |
357
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60 |
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? ' implements ' . implode( |
358
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60 |
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' & ', |
359
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60 |
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array_map( |
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static function ($i) { |
361
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60 |
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return $i->name; |
362
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60 |
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}, |
363
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60 |
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$interfaces |
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) |
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) |
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109 |
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: ''; |
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368
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109 |
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return self::printDescription($options, $type) . |
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109 |
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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[] $options |
374
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*/ |
375
|
109 |
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private static function printFields($options, $type) : string |
376
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{ |
377
|
109 |
|
$fields = array_values($type->getFields()); |
378
|
|
|
|
379
|
109 |
|
return implode( |
380
|
109 |
|
"\n", |
381
|
109 |
|
array_map( |
382
|
|
|
static function ($f, $i) use ($options) { |
383
|
109 |
|
return self::printDescription($options, $f, ' ', ! $i) . ' ' . |
384
|
109 |
|
$f->name . self::printArgs($options, $f->args, ' ') . ': ' . |
385
|
109 |
|
(string) $f->getType() . self::printDeprecated($f); |
386
|
109 |
|
}, |
387
|
109 |
|
$fields, |
388
|
109 |
|
array_keys($fields) |
389
|
|
|
) |
390
|
|
|
); |
391
|
|
|
} |
392
|
|
|
|
393
|
109 |
|
private static function printDeprecated($fieldOrEnumVal) : string |
394
|
|
|
{ |
395
|
109 |
|
$reason = $fieldOrEnumVal->deprecationReason; |
396
|
109 |
|
if (empty($reason)) { |
397
|
109 |
|
return ''; |
398
|
|
|
} |
399
|
1 |
|
if ($reason === '' || $reason === Directive::DEFAULT_DEPRECATION_REASON) { |
400
|
1 |
|
return ' @deprecated'; |
401
|
|
|
} |
402
|
|
|
|
403
|
|
|
return ' @deprecated(reason: ' . |
404
|
1 |
|
Printer::doPrint(AST::astFromValue($reason, Type::string())) . ')'; |
405
|
|
|
} |
406
|
|
|
|
407
|
|
|
/** |
408
|
|
|
* @param bool[] $options |
409
|
|
|
*/ |
410
|
60 |
|
private static function printInterface(InterfaceType $type, array $options) : string |
411
|
|
|
{ |
412
|
60 |
|
return self::printDescription($options, $type) . |
413
|
60 |
|
sprintf("interface %s {\n%s\n}", $type->name, self::printFields($options, $type)); |
414
|
|
|
} |
415
|
|
|
|
416
|
|
|
/** |
417
|
|
|
* @param bool[] $options |
418
|
|
|
*/ |
419
|
60 |
|
private static function printUnion(UnionType $type, array $options) : string |
420
|
|
|
{ |
421
|
60 |
|
return self::printDescription($options, $type) . |
422
|
60 |
|
sprintf('union %s = %s', $type->name, implode(' | ', $type->getTypes())); |
423
|
|
|
} |
424
|
|
|
|
425
|
|
|
/** |
426
|
|
|
* @param bool[] $options |
427
|
|
|
*/ |
428
|
65 |
|
private static function printEnum(EnumType $type, array $options) : string |
429
|
|
|
{ |
430
|
65 |
|
return self::printDescription($options, $type) . |
431
|
65 |
|
sprintf("enum %s {\n%s\n}", $type->name, self::printEnumValues($type->getValues(), $options)); |
432
|
|
|
} |
433
|
|
|
|
434
|
|
|
/** |
435
|
|
|
* @param bool[] $options |
436
|
|
|
*/ |
437
|
65 |
|
private static function printEnumValues($values, $options) : string |
438
|
|
|
{ |
439
|
65 |
|
return implode( |
440
|
65 |
|
"\n", |
441
|
65 |
|
array_map( |
442
|
|
|
static function ($value, $i) use ($options) { |
443
|
65 |
|
return self::printDescription($options, $value, ' ', ! $i) . ' ' . |
444
|
65 |
|
$value->name . self::printDeprecated($value); |
445
|
65 |
|
}, |
446
|
65 |
|
$values, |
447
|
65 |
|
array_keys($values) |
448
|
|
|
) |
449
|
|
|
); |
450
|
|
|
} |
451
|
|
|
|
452
|
|
|
/** |
453
|
|
|
* @param bool[] $options |
454
|
|
|
*/ |
455
|
58 |
|
private static function printInputObject(InputObjectType $type, array $options) : string |
456
|
|
|
{ |
457
|
58 |
|
$fields = array_values($type->getFields()); |
458
|
|
|
|
459
|
58 |
|
return self::printDescription($options, $type) . |
460
|
58 |
|
sprintf( |
461
|
58 |
|
"input %s {\n%s\n}", |
462
|
58 |
|
$type->name, |
463
|
58 |
|
implode( |
464
|
58 |
|
"\n", |
465
|
58 |
|
array_map( |
466
|
|
|
static function ($f, $i) use ($options) { |
467
|
58 |
|
return self::printDescription($options, $f, ' ', ! $i) . ' ' . self::printInputValue($f); |
468
|
58 |
|
}, |
469
|
58 |
|
$fields, |
470
|
58 |
|
array_keys($fields) |
471
|
|
|
) |
472
|
|
|
) |
473
|
|
|
); |
474
|
|
|
} |
475
|
|
|
|
476
|
|
|
/** |
477
|
|
|
* @param bool[] $options |
478
|
|
|
* |
479
|
|
|
* @api |
480
|
|
|
*/ |
481
|
2 |
|
public static function printIntrospectionSchema(Schema $schema, array $options = []) : string |
482
|
|
|
{ |
483
|
2 |
|
return self::printFilteredSchema( |
484
|
2 |
|
$schema, |
485
|
2 |
|
[Directive::class, 'isSpecifiedDirective'], |
486
|
2 |
|
[Introspection::class, 'isIntrospectionType'], |
487
|
2 |
|
$options |
488
|
|
|
); |
489
|
|
|
} |
490
|
|
|
} |
491
|
|
|
|