digiaonline /
graphql-php
| Total Complexity | 60 |
| Total Lines | 516 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like ExtensionContext often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use ExtensionContext, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 42 | class ExtensionContext implements ExtensionContextInterface |
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| 43 | { |
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| 44 | /** |
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| 45 | * @var SchemaInterface |
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| 46 | */ |
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| 47 | protected $schema; |
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| 48 | |||
| 49 | /** |
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| 50 | * @var DocumentNode |
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| 51 | */ |
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| 52 | protected $document; |
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| 53 | |||
| 54 | /** |
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| 55 | * @var DefinitionBuilderCreatorInterface |
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| 56 | */ |
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| 57 | protected $definitionBuilderCreator; |
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| 58 | |||
| 59 | /** |
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| 60 | * @var DefinitionBuilderInterface |
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| 61 | */ |
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| 62 | protected $definitionBuilder; |
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| 63 | |||
| 64 | /** |
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| 65 | * @var TypeDefinitionNodeInterface[] |
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| 66 | */ |
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| 67 | protected $typeDefinitionMap; |
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| 68 | |||
| 69 | /** |
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| 70 | * @var ObjectTypeExtensionNode[][]|InterfaceTypeExtensionNode[][] |
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| 71 | */ |
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| 72 | protected $typeExtensionsMap; |
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| 73 | |||
| 74 | /** |
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| 75 | * @var DirectiveDefinitionNode[] |
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| 76 | */ |
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| 77 | protected $directiveDefinitions; |
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| 78 | |||
| 79 | /** |
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| 80 | * @var NamedTypeInterface[] |
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| 81 | */ |
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| 82 | protected $extendTypeCache; |
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| 83 | |||
| 84 | /** |
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| 85 | * ExtensionContext constructor. |
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| 86 | * @param SchemaInterface $schema |
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| 87 | * @param DocumentNode $document |
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| 88 | * @param DefinitionBuilderCreatorInterface $definitionBuilderCreator |
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| 89 | * @throws ExtensionException |
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| 90 | */ |
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| 91 | public function __construct( |
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| 92 | SchemaInterface $schema, |
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| 93 | DocumentNode $document, |
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| 94 | DefinitionBuilderCreatorInterface $definitionBuilderCreator |
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| 95 | ) { |
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| 96 | $this->schema = $schema; |
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| 97 | $this->document = $document; |
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| 98 | $this->definitionBuilderCreator = $definitionBuilderCreator; |
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| 99 | $this->typeExtensionsMap = []; |
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| 100 | $this->typeDefinitionMap = []; |
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| 101 | $this->directiveDefinitions = []; |
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| 102 | $this->extendTypeCache = []; |
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| 103 | |||
| 104 | $typeDefinitionMap = $this->getExtendedDefinitions(); |
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| 105 | |||
| 106 | $this->definitionBuilder = $this->createDefinitionBuilder($typeDefinitionMap); |
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| 107 | |||
| 108 | } |
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| 109 | |||
| 110 | /** |
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| 111 | * @throws ExtensionException |
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| 112 | */ |
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| 113 | public function getExtendedDefinitions(): array |
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| 114 | { |
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| 115 | foreach ($this->document->getDefinitions() as $definition) { |
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| 116 | if ($definition instanceof TypeDefinitionNodeInterface) { |
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| 117 | // Sanity check that none of the defined types conflict with the schema's existing types. |
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| 118 | $typeName = $definition->getNameValue(); |
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| 119 | $existingType = $this->schema->getType($typeName); |
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| 120 | |||
| 121 | if (null !== $existingType) { |
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| 122 | throw new ExtensionException( |
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| 123 | \sprintf( |
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| 124 | 'Type "%s" already exists in the schema. It cannot also ' . |
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| 125 | 'be defined in this type definition.', |
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| 126 | $typeName |
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| 127 | ), |
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| 128 | [$definition] |
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| 129 | ); |
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| 130 | } |
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| 131 | |||
| 132 | $this->typeDefinitionMap[$typeName] = $definition; |
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| 133 | |||
| 134 | continue; |
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| 135 | } |
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| 136 | |||
| 137 | if ($definition instanceof ObjectTypeExtensionNode || $definition instanceof InterfaceTypeExtensionNode) { |
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| 138 | // Sanity check that this type extension exists within the schema's existing types. |
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| 139 | $extendedTypeName = $definition->getNameValue(); |
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| 140 | $existingType = $this->schema->getType($extendedTypeName); |
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| 141 | |||
| 142 | if (null === $existingType) { |
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| 143 | throw new ExtensionException( |
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| 144 | \sprintf( |
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| 145 | 'Cannot extend type "%s" because it does not exist in the existing schema.', |
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| 146 | $extendedTypeName |
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| 147 | ), |
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| 148 | [$definition] |
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| 149 | ); |
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| 150 | } |
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| 151 | |||
| 152 | $this->checkExtensionNode($existingType, $definition); |
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| 153 | |||
| 154 | $existingTypeExtensions = $this->typeExtensionsMap[$extendedTypeName] ?? []; |
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| 155 | |||
| 156 | $this->typeExtensionsMap[$extendedTypeName] = \array_merge($existingTypeExtensions, [$definition]); |
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| 157 | |||
| 158 | continue; |
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| 159 | } |
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| 160 | |||
| 161 | if ($definition instanceof DirectiveDefinitionNode) { |
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| 162 | $directiveName = $definition->getNameValue(); |
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| 163 | $existingDirective = $this->schema->getDirective($directiveName); |
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| 164 | |||
| 165 | if (null !== $existingDirective) { |
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| 166 | throw new ExtensionException( |
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| 167 | \sprintf( |
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| 168 | 'Directive "%s" already exists in the schema. It cannot be redefined.', |
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| 169 | $directiveName |
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| 170 | ), |
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| 171 | [$definition] |
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| 172 | ); |
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| 173 | } |
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| 174 | |||
| 175 | $this->directiveDefinitions[] = $definition; |
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| 176 | |||
| 177 | continue; |
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| 178 | } |
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| 179 | |||
| 180 | if ($definition instanceof ScalarTypeExtensionNode || |
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| 181 | $definition instanceof UnionTypeExtensionNode || |
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| 182 | $definition instanceof EnumTypeExtensionNode || |
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| 183 | $definition instanceof InputObjectTypeExtensionNode) { |
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| 184 | throw new ExtensionException( |
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| 185 | \sprintf('The %s kind is not yet supported by extendSchema().', $definition->getKind()) |
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| 186 | ); |
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| 187 | } |
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| 188 | } |
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| 189 | |||
| 190 | return $this->typeDefinitionMap; |
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| 191 | } |
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| 192 | |||
| 193 | /** |
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| 194 | * @return bool |
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| 195 | */ |
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| 196 | public function isSchemaExtended(): bool |
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| 197 | { |
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| 198 | return |
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| 199 | !empty(\array_keys($this->typeExtensionsMap)) || |
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| 200 | !empty(\array_keys($this->typeDefinitionMap)) || |
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| 201 | !empty($this->directiveDefinitions); |
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| 202 | } |
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| 203 | |||
| 204 | /** |
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| 205 | * @return TypeInterface|null |
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| 206 | * @throws InvalidArgumentException |
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| 207 | * @throws InvariantException |
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| 208 | */ |
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| 209 | public function getExtendedQueryType(): ?TypeInterface |
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| 210 | { |
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| 211 | $existingQueryType = $this->schema->getQueryType(); |
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| 212 | |||
| 213 | return null !== $existingQueryType |
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| 214 | ? $this->getExtendedType($existingQueryType) |
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| 215 | : null; |
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| 216 | } |
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| 217 | |||
| 218 | /** |
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| 219 | * @return TypeInterface|null |
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| 220 | * @throws InvalidArgumentException |
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| 221 | * @throws InvariantException |
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| 222 | */ |
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| 223 | public function getExtendedMutationType(): ?TypeInterface |
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| 224 | { |
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| 225 | $existingMutationType = $this->schema->getMutationType(); |
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| 226 | |||
| 227 | return null !== $existingMutationType |
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| 228 | ? $this->getExtendedType($existingMutationType) |
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| 229 | : null; |
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| 230 | } |
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| 231 | |||
| 232 | /** |
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| 233 | * @return TypeInterface|null |
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| 234 | * @throws InvalidArgumentException |
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| 235 | * @throws InvariantException |
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| 236 | */ |
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| 237 | public function getExtendedSubscriptionType(): ?TypeInterface |
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| 238 | { |
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| 239 | $existingSubscriptionType = $this->schema->getSubscriptionType(); |
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| 240 | |||
| 241 | return null !== $existingSubscriptionType |
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| 242 | ? $this->getExtendedType($existingSubscriptionType) |
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| 243 | : null; |
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| 244 | } |
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| 245 | |||
| 246 | /** |
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| 247 | * @return TypeInterface[] |
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| 248 | */ |
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| 249 | public function getExtendedTypes(): array |
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| 250 | { |
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| 251 | return \array_merge( |
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| 252 | \array_map(function ($type) { |
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| 253 | return $this->getExtendedType($type); |
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| 254 | }, \array_values($this->schema->getTypeMap())), |
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| 255 | $this->definitionBuilder->buildTypes(\array_values($this->typeDefinitionMap)) |
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| 256 | ); |
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| 257 | } |
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| 258 | |||
| 259 | /** |
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| 260 | * @return Directive[] |
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| 261 | * @throws InvariantException |
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| 262 | */ |
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| 263 | public function getExtendedDirectives(): array |
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| 264 | { |
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| 265 | $existingDirectives = $this->schema->getDirectives(); |
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| 266 | |||
| 267 | invariant(!empty($existingDirectives), 'schema must have default directives'); |
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| 268 | |||
| 269 | return \array_merge( |
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| 270 | $existingDirectives, |
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| 271 | \array_map(function (DirectiveDefinitionNode $node) { |
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| 272 | return $this->definitionBuilder->buildDirective($node); |
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| 273 | }, $this->directiveDefinitions) |
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| 274 | ); |
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| 275 | } |
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| 276 | |||
| 277 | /** |
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| 278 | * @param NamedTypeNode $node |
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| 279 | * @return TypeInterface|null |
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| 280 | * @throws ExtensionException |
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| 281 | * @throws InvalidArgumentException |
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| 282 | * @throws InvariantException |
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| 283 | */ |
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| 284 | public function resolveType(NamedTypeNode $node): ?TypeInterface |
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| 285 | { |
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| 286 | $typeName = $node->getNameValue(); |
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| 287 | $existingType = $this->schema->getType($typeName); |
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| 288 | |||
| 289 | if (null !== $existingType) { |
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| 290 | return $this->getExtendedType($existingType); |
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| 291 | } |
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| 292 | |||
| 293 | throw new ExtensionException( |
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| 294 | \sprintf( |
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| 295 | 'Unknown type: "%s". Ensure that this type exists ' . |
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| 296 | 'either in the original schema, or is added in a type definition.', |
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| 297 | $typeName |
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| 298 | ), |
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| 299 | [$node] |
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| 300 | ); |
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| 301 | } |
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| 302 | |||
| 303 | /** |
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| 304 | * @param array $typeDefinitionMap |
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| 305 | * @return DefinitionBuilderInterface |
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| 306 | */ |
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| 307 | protected function createDefinitionBuilder(array $typeDefinitionMap): DefinitionBuilderInterface |
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| 308 | { |
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| 309 | return $this->definitionBuilderCreator->create($typeDefinitionMap, [$this, 'resolveType']); |
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| 310 | } |
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| 311 | |||
| 312 | /** |
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| 313 | * @param TypeInterface $type |
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| 314 | * @param NodeInterface $node |
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| 315 | * @throws ExtensionException |
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| 316 | */ |
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| 317 | protected function checkExtensionNode(TypeInterface $type, NodeInterface $node): void |
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| 318 | { |
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| 319 | if ($node instanceof ObjectTypeExtensionNode && !($type instanceof ObjectType)) { |
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| 320 | throw new ExtensionException( |
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| 321 | \sprintf('Cannot extend non-object type "%s".', toString($type)), |
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| 322 | [$node] |
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| 323 | ); |
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| 324 | } |
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| 325 | |||
| 326 | if ($node instanceof InterfaceTypeExtensionNode && !($type instanceof InterfaceType)) { |
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| 327 | throw new ExtensionException( |
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| 328 | \sprintf('Cannot extend non-interface type "%s".', toString($type)), |
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| 329 | [$node] |
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| 330 | ); |
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| 331 | } |
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| 332 | } |
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| 333 | |||
| 334 | /** |
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| 335 | * @param TypeInterface $type |
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| 336 | * @return TypeInterface |
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| 337 | * @throws InvalidArgumentException |
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| 338 | * @throws InvariantException |
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| 339 | */ |
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| 340 | protected function getExtendedType(TypeInterface $type): TypeInterface |
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| 341 | { |
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| 342 | $typeName = $type->getName(); |
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|
Bug
introduced
by
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| 343 | |||
| 344 | if (!isset($this->extendTypeCache[$typeName])) { |
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| 345 | $this->extendTypeCache[$typeName] = $this->extendType($type); |
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| 346 | } |
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| 347 | |||
| 348 | return $this->extendTypeCache[$typeName]; |
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| 349 | } |
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| 350 | |||
| 351 | /** |
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| 352 | * @param TypeInterface $type |
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| 353 | * @return TypeInterface |
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| 354 | * @throws InvariantException |
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| 355 | */ |
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| 356 | protected function extendType(TypeInterface $type): TypeInterface |
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| 357 | { |
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| 358 | /** @noinspection PhpParamsInspection */ |
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| 359 | if (isIntrospectionType($type)) { |
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| 360 | // Introspection types are not extended. |
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| 361 | return $type; |
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| 362 | } |
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| 363 | |||
| 364 | if ($type instanceof ObjectType) { |
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| 365 | return $this->extendObjectType($type); |
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| 366 | } |
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| 367 | |||
| 368 | if ($type instanceof InterfaceType) { |
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| 369 | return $this->extendInterfaceType($type); |
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| 370 | } |
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| 371 | |||
| 372 | if ($type instanceof UnionType) { |
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| 373 | return $this->extendUnionType($type); |
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| 374 | } |
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| 375 | |||
| 376 | // This type is not yet extendable. |
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| 377 | return $type; |
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| 378 | } |
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| 379 | |||
| 380 | /** |
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| 381 | * @param ObjectType $type |
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| 382 | * @return ObjectType |
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| 383 | */ |
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| 384 | protected function extendObjectType(ObjectType $type): ObjectType |
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| 385 | { |
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| 386 | $typeName = $type->getName(); |
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| 387 | $extensionASTNodes = $type->getExtensionAstNodes(); |
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| 388 | |||
| 389 | if (isset($this->typeExtensionsMap[$typeName])) { |
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| 390 | $extensionASTNodes = !empty($extensionASTNodes) |
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| 391 | ? \array_merge($this->typeExtensionsMap[$typeName], $extensionASTNodes) |
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| 392 | : $this->typeExtensionsMap[$typeName]; |
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| 393 | } |
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| 394 | |||
| 395 | return GraphQLObjectType([ |
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| 396 | 'name' => $typeName, |
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| 397 | 'description' => $type->getDescription(), |
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| 398 | 'interfaces' => function () use ($type) { |
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| 399 | return $this->extendImplementedInterfaces($type); |
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| 400 | }, |
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| 401 | 'fields' => function () use ($type) { |
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| 402 | return $this->extendFieldMap($type); |
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| 403 | }, |
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| 404 | 'astNode' => $type->getAstNode(), |
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| 405 | 'extensionASTNodes' => $extensionASTNodes, |
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| 406 | 'isTypeOf' => $type->getIsTypeOf(), |
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| 407 | ]); |
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| 408 | } |
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| 409 | |||
| 410 | /** |
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| 411 | * @param InterfaceType $type |
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| 412 | * @return InterfaceType |
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| 413 | */ |
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| 414 | protected function extendInterfaceType(InterfaceType $type): InterfaceType |
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| 415 | { |
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| 416 | $typeName = $type->getName(); |
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| 417 | $extensionASTNodes = $this->typeExtensionsMap[$typeName] ?? []; |
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| 418 | |||
| 419 | if (isset($this->typeExtensionsMap[$typeName])) { |
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| 420 | $extensionASTNodes = !empty($extensionASTNodes) |
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| 421 | ? \array_merge($this->typeExtensionsMap[$typeName], $extensionASTNodes) |
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| 422 | : $this->typeExtensionsMap[$typeName]; |
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| 423 | } |
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| 424 | |||
| 425 | return GraphQLInterfaceType([ |
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| 426 | 'name' => $typeName, |
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| 427 | 'description' => $type->getDescription(), |
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| 428 | 'fields' => function () use ($type) { |
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| 429 | return $this->extendFieldMap($type); |
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| 430 | }, |
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| 431 | 'astNode' => $type->getAstNode(), |
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| 432 | 'extensionASTNodes' => $extensionASTNodes, |
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| 433 | 'resolveType' => $type->getResolveType(), |
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| 434 | ]); |
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| 435 | } |
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| 436 | |||
| 437 | /** |
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| 438 | * @param UnionType $type |
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| 439 | * @return UnionType |
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| 440 | * @throws InvariantException |
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| 441 | */ |
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| 442 | protected function extendUnionType(UnionType $type): UnionType |
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| 443 | { |
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| 444 | return GraphQLUnionType([ |
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| 445 | 'name' => $type->getName(), |
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| 446 | 'description' => $type->getDescription(), |
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| 447 | 'types' => \array_map(function ($unionType) { |
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| 448 | return $this->getExtendedType($unionType); |
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| 449 | }, $type->getTypes()), |
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| 450 | 'astNode' => $type->getAstNode(), |
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| 451 | 'resolveType' => $type->getResolveType(), |
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| 452 | ]); |
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| 453 | } |
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| 454 | |||
| 455 | /** |
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| 456 | * @param ObjectType $type |
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| 457 | * @return array |
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| 458 | * @throws InvariantException |
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| 459 | */ |
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| 460 | protected function extendImplementedInterfaces(ObjectType $type): array |
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| 481 | } |
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| 482 | |||
| 483 | /** |
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| 484 | * @param TypeInterface|ObjectType|InterfaceType $type |
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| 485 | * @return array |
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| 486 | * @throws InvalidTypeException |
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| 487 | * @throws InvariantException |
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| 488 | * @throws ExtensionException |
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| 489 | * @throws InvalidArgumentException |
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| 490 | */ |
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| 491 | protected function extendFieldMap(TypeInterface $type): array |
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| 538 | } |
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| 539 | |||
| 540 | /** |
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| 541 | * @param TypeInterface $typeDefinition |
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| 542 | * @return TypeInterface |
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| 543 | * @throws InvalidArgumentException |
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| 544 | * @throws InvalidTypeException |
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| 545 | * @throws InvariantException |
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| 546 | */ |
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| 547 | protected function extendFieldType(TypeInterface $typeDefinition): TypeInterface |
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| 558 | } |
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| 559 | } |
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| 560 |
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