Long list passed to directive will be split to multiple lines.

Author: LastDragon-ru

src/Utils/SchemaPrinter.php

@@ -10,7 +10,10 @@
 use GraphQL\Language\AST\DirectiveNode;
 use GraphQL\Language\AST\EnumTypeDefinitionNode;
 use GraphQL\Language\AST\EnumValueDefinitionNode;
+use GraphQL\Language\AST\ListValueNode;
+use GraphQL\Language\AST\Node;
 use GraphQL\Language\AST\ScalarTypeDefinitionNode;
+use GraphQL\Language\AST\ValueNode;
 use GraphQL\Language\BlockString;
 use GraphQL\Language\Printer;
 use GraphQL\Type\Definition\Directive;
@@ -602,7 +605,24 @@ protected static function printTypeDirective(DirectiveNode $directive, array $op
      */
     protected static function printArgument(ArgumentNode $argument, array $options, string $indentation): string
     {
-        return "{$indentation}{$argument->name->value}: " . Printer::doPrint($argument->value);
+        $value = $argument->value;
+
+        if ($value instanceof ListValueNode) {
+            $length = 0;
+            $values = [];
+
+            foreach ($value->values as $item) {
+                $string = '  ' . $indentation . Printer::doPrint($item);
+                $length = $length + mb_strlen($string);
+                $values[] = $string;
+            }
+
+            $value = static::printLines($values, '[', ']', static::isLineTooLong($length), $indentation);
+        } else {
+            $value = Printer::doPrint($value);
+        }
+
+        return "{$indentation}{$argument->name->value}: {$value}";
     }
 
     /**

tests/Utils/SchemaPrinterTest.php

@@ -1281,6 +1281,7 @@ public function testPrintDirectives(): void {
         $text = str_pad('a', 80, 'a');
         $schema = /** @lang GraphQL */ <<<GRAPHQL
             directive @test(
+              values: [String!]
               value: String @test(value: "{$text}")
               text: String
             ) on SCHEMA |
@@ -1366,10 +1367,13 @@ interface InterfaceB implements InterfaceA @test(value: "{$text}") {
                 "{$text}"
                 d: String = "123" @test(value: "{$text}", text: "{$text}")
               ): Boolean
+              e: String @test(values: ["{$text}", "{$text}", "{$text}"])
             }
             GRAPHQL;
         $expected = /** @lang GraphQL */ <<<'GRAPHQL'
             directive @test(
+              values: [String!]
+
               value: String
               @test(
                 value: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
@@ -1507,6 +1511,15 @@ interface InterfaceB implements InterfaceA
                   text: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                 )
               ): Boolean
+
+              e: String
+              @test(
+                values: [
+                  "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                  "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                  "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                ]
+              )
             }
 
             scalar ScalarA @test