Merge branch 'master' of https://github.com/webonyx/graphql-php into v0.10

Author: vladar

examples/02-shorthand/README.md

@@ -0,0 +1,19 @@
+# Parsing GraphQL IDL shorthand
+
+Same as the Hello world example but shows how to build GraphQL schema from shorthand 
+and wire up some resolvers
+
+### Run locally
+```
+php -S localhost:8080 ./graphql.php
+```
+
+### Try query
+```
+curl http://localhost:8080 -d '{"query": "query { echo(message: \"Hello World\") }" }'
+```
+
+### Try mutation
+```
+curl http://localhost:8080 -d '{"query": "mutation { sum(x: 2, y: 2) }" }'
+```

examples/02-shorthand/graphql.php

@@ -0,0 +1,31 @@
+<?php
+// Test this using following command
+// php -S localhost:8080 ./graphql.php &
+// curl http://localhost:8080 -d '{"query": "query { echo(message: \"Hello World\") }" }'
+// curl http://localhost:8080 -d '{"query": "mutation { sum(x: 2, y: 2) }" }'
+require_once __DIR__ . '/../../vendor/autoload.php';
+
+use GraphQL\GraphQL;
+use GraphQL\Utils\BuildSchema;
+
+try {
+
+    $schema = BuildSchema::build(file_get_contents(__DIR__ . '/schema.graphqls'));
+    $rootValue = include __DIR__ . '/rootvalue.php';
+
+    $rawInput = file_get_contents('php://input');
+    $input = json_decode($rawInput, true);
+    $query = $input['query'];
+    $variableValues = isset($input['variables']) ? $input['variables'] : null;
+
+    $result = GraphQL::execute($schema, $query, $rootValue, null, $variableValues);
+} catch (\Exception $e) {
+    $result = [
+        'error' => [
+            'message' => $e->getMessage()
+        ]
+    ];
+}
+header('Content-Type: application/json; charset=UTF-8');
+echo json_encode($result);
+

examples/02-shorthand/rootvalue.php

@@ -0,0 +1,35 @@
+<?php
+
+interface Resolver {
+    public function resolve($root, $args, $context);
+}
+
+class Addition implements Resolver
+{
+    public function resolve($root, $args, $context)
+    {
+        return $args['x'] + $args['y'];
+    }
+}
+
+class Echoer implements Resolver
+{
+    public function resolve($root, $args, $context)
+    {
+        return $root['prefix'].$args['message'];
+    }
+}
+
+return [
+    'sum' => function($root, $args, $context) {
+        $sum = new Addition();
+
+        return $sum->resolve($root, $args, $context);
+    },
+    'echo' => function($root, $args, $context) {
+        $echo = new Echoer();
+
+        return $echo->resolve($root, $args, $context);
+    },
+    'prefix' => 'You said: ',
+];

examples/02-shorthand/schema.graphqls

@@ -0,0 +1,13 @@
+schema {
+  query: Query
+  mutation: Calc
+}
+
+type Calc {
+  sum(x: Int, y: Int): Int
+}
+
+type Query {
+  echo(message: String): String
+}
+

src/Type/Definition/IDType.php

@@ -1,8 +1,10 @@
 <?php
 namespace GraphQL\Type\Definition;
 
+use GraphQL\Error\UserError;
 use GraphQL\Language\AST\IntValueNode;
 use GraphQL\Language\AST\StringValueNode;
+use GraphQL\Utils;
 
 /**
  * Class IDType
@@ -46,6 +48,12 @@ public function parseValue($value)
         if ($value === false) {
             return 'false';
         }
+        if ($value === null) {
+            return 'null';
+        }
+        if (!is_scalar($value)) {
+            throw new UserError("String cannot represent non scalar value: " . Utils::printSafe($value));
+        }
         return (string) $value;
     }
 

src/Type/Definition/StringType.php

@@ -1,7 +1,9 @@
 <?php
 namespace GraphQL\Type\Definition;
 
+use GraphQL\Error\UserError;
 use GraphQL\Language\AST\StringValueNode;
+use GraphQL\Utils;
 
 /**
  * Class StringType
@@ -43,6 +45,12 @@ public function parseValue($value)
         if ($value === false) {
             return 'false';
         }
+        if ($value === null) {
+            return 'null';
+        }
+        if (!is_scalar($value)) {
+            throw new UserError("String cannot represent non scalar value: " . Utils::printSafe($value));
+        }
         return (string) $value;
     }
 

tests/Type/ScalarSerializationTest.php

@@ -144,6 +144,21 @@ public function testSerializesOutputStrings()
         $this->assertSame('-1.1', $stringType->serialize(-1.1));
         $this->assertSame('true', $stringType->serialize(true));
         $this->assertSame('false', $stringType->serialize(false));
+        $this->assertSame('null', $stringType->serialize(null));
+
+        try {
+            $stringType->serialize([]);
+            $this->fail('Expected exception was not thrown');
+        } catch (UserError $e) {
+            $this->assertEquals('String cannot represent non scalar value: array', $e->getMessage());
+        }
+
+        try {
+            $stringType->serialize(new \stdClass());
+            $this->fail('Expected exception was not thrown');
+        } catch (UserError $e) {
+            $this->assertEquals('String cannot represent non scalar value: instance of stdClass', $e->getMessage());
+        }
     }
 
     /**