digiaonline /
graphql-php
| Total Complexity | 64 |
| Total Lines | 531 |
| Duplicated Lines | 0 % |
| Changes | 5 | ||
| Bugs | 0 | Features | 0 |
Complex classes like DefinitionPrinter 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 DefinitionPrinter, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 31 | class DefinitionPrinter implements DefinitionPrinterInterface |
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| 32 | { |
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| 33 | /** |
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| 34 | * @var array |
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| 35 | */ |
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| 36 | protected $options; |
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| 37 | |||
| 38 | /** |
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| 39 | * @inheritdoc |
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| 40 | * @throws PrintException |
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| 41 | * @throws InvariantException |
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| 42 | */ |
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| 43 | public function printSchema(Schema $schema, array $options = []): string |
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| 44 | { |
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| 45 | $this->options = $options; |
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| 46 | |||
| 47 | return $this->printFilteredSchema( |
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| 48 | $schema, |
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| 49 | function (Directive $directive): bool { |
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| 50 | return !isSpecifiedDirective($directive); |
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| 51 | }, |
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| 52 | function (NamedTypeInterface $type): bool { |
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| 53 | return !isSpecifiedScalarType($type) && !isIntrospectionType($type); |
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| 54 | } |
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| 55 | ); |
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| 56 | } |
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| 57 | |||
| 58 | /** |
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| 59 | * @inheritdoc |
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| 60 | * @throws PrintException |
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| 61 | * @throws InvariantException |
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| 62 | */ |
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| 63 | public function printIntrospectionSchema(Schema $schema, array $options = []): string |
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| 64 | { |
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| 65 | $this->options = $options; |
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| 66 | |||
| 67 | return $this->printFilteredSchema( |
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| 68 | $schema, |
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| 69 | function (Directive $directive): bool { |
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| 70 | return isSpecifiedDirective($directive); |
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| 71 | }, |
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| 72 | function (NamedTypeInterface $type): bool { |
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| 73 | return isIntrospectionType($type); |
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| 74 | } |
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| 75 | ); |
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| 76 | } |
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| 77 | |||
| 78 | /** |
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| 79 | * @param DefinitionInterface $definition |
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| 80 | * @return string |
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| 81 | * @throws PrintException |
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| 82 | * @throws InvariantException |
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| 83 | */ |
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| 84 | public function print(DefinitionInterface $definition): string |
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| 85 | { |
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| 86 | if ($definition instanceof Schema) { |
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| 87 | return $this->printSchemaDefinition($definition); |
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| 88 | } |
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| 89 | |||
| 90 | if ($definition instanceof Directive) { |
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| 91 | return $this->printDirectiveDefinition($definition); |
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| 92 | } |
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| 93 | |||
| 94 | if ($definition instanceof NamedTypeInterface) { |
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| 95 | return $this->printType($definition); |
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| 96 | } |
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| 97 | |||
| 98 | throw new PrintException(\sprintf('Invalid definition object: %s.', toString($definition))); |
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| 99 | } |
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| 100 | |||
| 101 | /** |
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| 102 | * @param Schema $schema |
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| 103 | * @param callable $directiveFilter |
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| 104 | * @param callable $typeFilter |
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| 105 | * @return string |
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| 106 | * @throws PrintException |
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| 107 | * @throws InvariantException |
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| 108 | */ |
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| 109 | protected function printFilteredSchema( |
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| 110 | Schema $schema, |
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| 111 | callable $directiveFilter, |
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| 112 | callable $typeFilter |
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| 113 | ): string { |
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| 114 | /** @noinspection PhpParamsInspection */ |
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| 115 | $lines = \array_filter(\array_merge( |
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| 116 | [$this->printOne($schema)], |
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| 117 | $this->printMany($this->getSchemaDirectives($schema, $directiveFilter)), |
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| 118 | $this->printMany($this->getSchemaTypes($schema, $typeFilter)) |
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| 119 | )); |
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| 120 | |||
| 121 | return printArray("\n\n", $lines) . "\n"; |
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| 122 | } |
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| 123 | |||
| 124 | /** |
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| 125 | * @param Schema $schema |
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| 126 | * @param callable $filter |
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| 127 | * @return array |
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| 128 | */ |
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| 129 | protected function getSchemaDirectives(Schema $schema, callable $filter): array |
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| 130 | { |
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| 131 | return \array_filter($schema->getDirectives(), $filter); |
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| 132 | } |
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| 133 | |||
| 134 | /** |
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| 135 | * @param Schema $schema |
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| 136 | * @param callable $filter |
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| 137 | * @return array |
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| 138 | */ |
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| 139 | protected function getSchemaTypes(Schema $schema, callable $filter): array |
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| 140 | { |
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| 141 | $types = \array_filter(\array_values($schema->getTypeMap()), $filter); |
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| 142 | |||
| 143 | \usort($types, function (NamedTypeInterface $typeA, NamedTypeInterface $typeB) { |
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| 144 | return \strcasecmp($typeA->getName(), $typeB->getName()); |
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| 145 | }); |
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| 146 | |||
| 147 | return $types; |
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| 148 | } |
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| 149 | |||
| 150 | /** |
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| 151 | * @param Schema $definition |
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| 152 | * @return string |
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| 153 | */ |
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| 154 | protected function printSchemaDefinition(Schema $definition): string |
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| 155 | { |
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| 156 | if ($this->isSchemaOfCommonNames($definition)) { |
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| 157 | return ''; |
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| 158 | } |
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| 159 | |||
| 160 | $operationTypes = []; |
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| 161 | |||
| 162 | if (null !== ($queryType = $definition->getQueryType())) { |
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| 163 | $operationTypes[] = " query: {$queryType->getName()}"; |
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| 164 | } |
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| 165 | |||
| 166 | if (null !== ($mutationType = $definition->getMutationType())) { |
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| 167 | $operationTypes[] = " mutation: {$mutationType->getName()}"; |
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| 168 | } |
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| 169 | |||
| 170 | if (null !== ($subscriptionType = $definition->getSubscriptionType())) { |
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| 171 | $operationTypes[] = " subscription: {$subscriptionType->getName()}"; |
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| 172 | } |
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| 173 | |||
| 174 | return printLines([ |
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| 175 | 'schema {', |
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| 176 | printLines($operationTypes), |
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| 177 | '}' |
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| 178 | ]); |
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| 179 | } |
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| 180 | |||
| 181 | /** |
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| 182 | * GraphQL schema define root types for each type of operation. These types are |
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| 183 | * the same as any other type and can be named in any manner, however there is |
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| 184 | * a common naming convention: |
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| 185 | * |
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| 186 | * schema { |
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| 187 | * query: Query |
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| 188 | * mutation: Mutation |
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| 189 | * subscription: Subscription |
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| 190 | * } |
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| 191 | * |
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| 192 | * When using this naming convention, the schema description can be omitted. |
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| 193 | * |
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| 194 | * @param Schema $schema |
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| 195 | * @return bool |
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| 196 | */ |
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| 197 | protected function isSchemaOfCommonNames(Schema $schema): bool |
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| 198 | { |
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| 199 | if (null !== ($queryType = $schema->getQueryType()) && |
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| 200 | $queryType->getName() !== 'Query') { |
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| 201 | return false; |
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| 202 | } |
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| 203 | |||
| 204 | if (null !== ($mutationType = $schema->getMutationType()) && |
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| 205 | $mutationType->getName() !== 'Mutation') { |
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| 206 | return false; |
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| 207 | } |
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| 208 | |||
| 209 | if (null !== ($subscriptionType = $schema->getSubscriptionType()) && |
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| 210 | $subscriptionType->getName() !== 'Subscription') { |
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| 211 | return false; |
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| 212 | } |
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| 213 | |||
| 214 | return true; |
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| 215 | } |
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| 216 | |||
| 217 | /** |
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| 218 | * @param Directive $directive |
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| 219 | * @return string |
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| 220 | */ |
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| 221 | public function printDirectiveDefinition(Directive $directive): string |
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| 222 | { |
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| 223 | $description = $this->printDescription($directive); |
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| 224 | $name = $directive->getName(); |
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| 225 | $arguments = $this->printArguments($directive->getArguments()); |
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| 226 | $locations = implode(' | ', $directive->getLocations()); |
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| 227 | |||
| 228 | return printLines([ |
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| 229 | $description, |
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| 230 | "directive @{$name}{$arguments} on {$locations}", |
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| 231 | ]); |
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| 232 | } |
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| 233 | |||
| 234 | /** |
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| 235 | * @param NamedTypeInterface $type |
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| 236 | * @return string |
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| 237 | * @throws PrintException |
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| 238 | * @throws InvariantException |
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| 239 | */ |
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| 240 | protected function printType(NamedTypeInterface $type): string |
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| 241 | { |
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| 242 | if ($type instanceof ScalarType) { |
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| 243 | return $this->printScalarType($type); |
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| 244 | } |
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| 245 | if ($type instanceof ObjectType) { |
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| 246 | return $this->printObjectType($type); |
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| 247 | } |
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| 248 | if ($type instanceof InterfaceType) { |
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| 249 | return $this->printInterfaceType($type); |
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| 250 | } |
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| 251 | if ($type instanceof UnionType) { |
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| 252 | return $this->printUnionType($type); |
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| 253 | } |
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| 254 | if ($type instanceof EnumType) { |
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| 255 | return $this->printEnumType($type); |
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| 256 | } |
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| 257 | if ($type instanceof InputObjectType) { |
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| 258 | return $this->printInputObjectType($type); |
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| 259 | } |
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| 260 | |||
| 261 | throw new PrintException(\sprintf('Unknown type: %s', (string)$type)); |
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| 262 | } |
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| 263 | |||
| 264 | /** |
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| 265 | * @param ScalarType $type |
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| 266 | * @return string |
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| 267 | */ |
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| 268 | protected function printScalarType(ScalarType $type): string |
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| 269 | { |
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| 270 | return printLines([ |
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| 271 | $this->printDescription($type), |
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| 272 | "scalar {$type->getName()}" |
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| 273 | ]); |
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| 274 | } |
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| 275 | |||
| 276 | /** |
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| 277 | * @param ObjectType $type |
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| 278 | * @return string |
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| 279 | * @throws InvariantException |
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| 280 | */ |
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| 281 | protected function printObjectType(ObjectType $type): string |
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| 282 | { |
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| 283 | $description = $this->printDescription($type); |
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| 284 | $name = $type->getName(); |
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| 285 | $implements = $type->hasInterfaces() |
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| 286 | ? ' implements ' . printArray(' & ', \array_map(function (InterfaceType $interface) { |
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| 287 | return $interface->getName(); |
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| 288 | }, $type->getInterfaces())) |
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| 289 | : ''; |
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| 290 | $fields = $this->printFields($type->getFields()); |
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| 291 | |||
| 292 | return printLines([ |
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| 293 | $description, |
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| 294 | "type {$name}{$implements} {", |
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| 295 | $fields, |
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| 296 | '}' |
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| 297 | ]); |
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| 298 | } |
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| 299 | |||
| 300 | /** |
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| 301 | * @param InterfaceType $type |
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| 302 | * @return string |
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| 303 | * @throws InvariantException |
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| 304 | */ |
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| 305 | protected function printInterfaceType(InterfaceType $type): string |
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| 306 | { |
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| 307 | $description = $this->printDescription($type); |
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| 308 | $fields = $this->printFields($type->getFields()); |
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| 309 | |||
| 310 | return printLines([ |
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| 311 | $description, |
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| 312 | "interface {$type->getName()} {", |
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| 313 | $fields, |
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| 314 | '}' |
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| 315 | ]); |
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| 316 | } |
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| 317 | |||
| 318 | /** |
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| 319 | * @param UnionType $type |
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| 320 | * @return string |
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| 321 | * @throws InvariantException |
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| 322 | */ |
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| 323 | protected function printUnionType(UnionType $type): string |
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| 324 | { |
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| 325 | $description = $this->printDescription($type); |
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| 326 | $types = printArray(' | ', $type->getTypes()); |
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| 327 | |||
| 328 | return printLines([ |
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| 329 | $description, |
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| 330 | "union {$type->getName()} = {$types}" |
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| 331 | ]); |
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| 332 | } |
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| 333 | |||
| 334 | /** |
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| 335 | * @param EnumType $type |
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| 336 | * @return string |
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| 337 | * @throws InvariantException |
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| 338 | */ |
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| 339 | protected function printEnumType(EnumType $type): string |
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| 340 | { |
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| 341 | $description = $this->printDescription($type); |
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| 342 | $values = $this->printEnumValues($type->getValues()); |
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| 343 | |||
| 344 | return printLines([ |
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| 345 | $description, |
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| 346 | "enum {$type->getName()} {", |
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| 347 | $values, |
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| 348 | '}' |
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| 349 | ]); |
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| 350 | } |
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| 351 | |||
| 352 | protected function printEnumValues(array $values): string |
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| 353 | { |
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| 354 | return printLines(\array_map(function (EnumValue $value): string { |
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| 355 | $description = $this->printDescription($value, ' '); |
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| 356 | $name = $value->getName(); |
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| 357 | $deprecated = $this->printDeprecated($value); |
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| 358 | $enum = empty($deprecated) ? $name : "{$name} {$deprecated}"; |
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| 359 | |||
| 360 | return printLines([ |
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| 361 | $description, |
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| 362 | " {$enum}" |
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| 363 | ]); |
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| 364 | }, $values)); |
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| 365 | } |
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| 366 | |||
| 367 | /** |
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| 368 | * @param InputObjectType $type |
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| 369 | * @return string |
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| 370 | * @throws InvariantException |
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| 371 | */ |
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| 372 | protected function printInputObjectType(InputObjectType $type): string |
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| 373 | { |
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| 374 | $description = $this->printDescription($type); |
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| 375 | $fields = \array_map(function (InputField $field): string { |
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| 376 | $description = $this->printDescription($field, ' '); |
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| 377 | $inputValue = $this->printInputValue($field); |
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| 378 | return printLines([ |
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| 379 | $description, |
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| 380 | " {$inputValue}" |
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| 381 | ]); |
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| 382 | }, \array_values($type->getFields())); |
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| 383 | |||
| 384 | return printLines([ |
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| 385 | $description, |
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| 386 | "input {$type->getName()} {", |
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| 387 | printLines($fields), |
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| 388 | '}' |
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| 389 | ]); |
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| 390 | } |
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| 391 | |||
| 392 | /** |
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| 393 | * @param InputValueInterface $inputValue |
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| 394 | * @return string |
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| 395 | * @throws InvariantException |
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| 396 | * @throws \Digia\GraphQL\Language\SyntaxErrorException |
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| 397 | * @throws \Digia\GraphQL\Util\ConversionException |
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| 398 | */ |
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| 399 | protected function printInputValue(InputValueInterface $inputValue): string |
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| 400 | { |
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| 401 | $type = $inputValue->getType(); |
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| 402 | $name = $inputValue->getName(); |
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| 403 | |||
| 404 | $defaultValue = $inputValue->hasDefaultValue() |
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| 405 | ? printNode(ValueConverter::convert($inputValue->getDefaultValue(), $type)) |
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| 406 | : null; |
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| 407 | |||
| 408 | return $defaultValue !== null |
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| 409 | ? "{$name}: {$type} = {$defaultValue}" |
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| 410 | : "{$name}: {$type}"; |
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| 411 | } |
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| 412 | |||
| 413 | /** |
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| 414 | * @param array $fields |
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| 415 | * @return string |
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| 416 | */ |
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| 417 | protected function printFields(array $fields): string |
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| 418 | { |
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| 419 | return printLines(\array_map(function (Field $field): string { |
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| 420 | $description = $this->printDescription($field, ' '); |
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| 421 | $name = $field->getName(); |
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| 422 | $arguments = $this->printArguments($field->getArguments()); |
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| 423 | $type = (string)$field->getType(); |
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| 424 | $deprecated = $this->printDeprecated($field); |
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| 425 | return printLines([ |
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| 426 | $description, |
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| 427 | " {$name}{$arguments}: {$type}{$deprecated}" |
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| 428 | ]); |
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| 429 | }, \array_values($fields))); |
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| 430 | } |
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| 431 | |||
| 432 | /** |
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| 433 | * @param array $arguments |
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| 434 | * @param string $indentation |
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| 435 | * @return string |
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| 436 | */ |
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| 437 | protected function printArguments(array $arguments, string $indentation = ''): string |
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| 438 | { |
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| 439 | if (empty($arguments)) { |
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| 440 | return ''; |
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| 441 | } |
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| 442 | |||
| 443 | // If every arg does not have a description, print them on one line. |
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| 444 | if (arrayEvery($arguments, function (Argument $argument): bool { |
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| 445 | return !$argument->hasDescription(); |
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| 446 | })) { |
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| 447 | return printInputFields(\array_map(function (Argument $argument) { |
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| 448 | return $this->printInputValue($argument); |
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| 449 | }, $arguments)); |
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| 450 | } |
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| 451 | |||
| 452 | $args = \array_map(function (Argument $argument) use ($indentation) { |
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| 453 | $description = $this->printDescription($argument, ' '); |
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| 454 | $inputValue = $this->printInputValue($argument); |
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| 455 | return printLines([ |
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| 456 | "{$indentation}{$description}", |
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| 457 | " {$indentation}{$inputValue}" |
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| 458 | ]); |
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| 459 | }, $arguments); |
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| 460 | |||
| 461 | return printLines([ |
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| 462 | '(', |
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| 463 | implode("", $args), |
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| 464 | $indentation . ')' |
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| 465 | ]); |
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| 466 | } |
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| 467 | |||
| 468 | /** |
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| 469 | * @param DeprecationAwareInterface $fieldOrEnumValue |
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| 470 | * @return string |
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| 471 | * @throws InvariantException |
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| 472 | * @throws \Digia\GraphQL\Language\SyntaxErrorException |
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| 473 | * @throws \Digia\GraphQL\Util\ConversionException |
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| 474 | */ |
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| 475 | protected function printDeprecated(DeprecationAwareInterface $fieldOrEnumValue): string |
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| 490 | } |
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| 491 | |||
| 492 | /** |
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| 493 | * @param DescriptionAwareInterface $definition |
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| 494 | * @param string $indentation |
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| 495 | * @param bool $isFirstInBlock |
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| 496 | * @return string |
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| 497 | */ |
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| 498 | protected function printDescription( |
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| 499 | DescriptionAwareInterface $definition, |
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| 500 | string $indentation = '', |
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| 501 | bool $isFirstInBlock = true |
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| 502 | ): string { |
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| 503 | // Don't print anything if the type has no description |
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| 504 | if ($definition->getDescription() === null) { |
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| 505 | return ''; |
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| 506 | } |
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| 507 | |||
| 508 | $lines = descriptionLines($definition->getDescription(), 120 - \strlen($indentation)); |
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| 509 | |||
| 510 | if (isset($this->options['commentDescriptions']) && true === $this->options['commentDescriptions']) { |
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| 511 | return $this->printDescriptionWithComments($lines, $indentation, $isFirstInBlock); |
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| 512 | } |
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| 513 | |||
| 514 | $text = \implode("\n", $lines); |
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| 515 | $preferMultipleLines = \strlen($text) > 70; |
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| 516 | $blockString = printBlockString($text, '', $preferMultipleLines); |
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| 517 | $prefix = strlen($indentation) > 0 && !$isFirstInBlock ? "\n" . $indentation : $indentation; |
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| 518 | |||
| 519 | return $prefix . \str_replace("\n", "\n" . $indentation, $blockString); |
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| 520 | } |
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| 521 | |||
| 522 | /** |
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| 523 | * @param array $lines |
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| 524 | * @param string $indentation |
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| 525 | * @param bool $isFirstInBlock |
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| 526 | * @return string |
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| 527 | */ |
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| 528 | protected function printDescriptionWithComments(array $lines, string $indentation, bool $isFirstInBlock): string |
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| 540 | } |
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| 541 | |||
| 542 | /** |
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| 543 | * @param DefinitionInterface $definition |
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| 544 | * @return string |
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| 545 | * @throws PrintException |
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| 546 | * @throws InvariantException |
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| 547 | */ |
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| 548 | protected function printOne(DefinitionInterface $definition): string |
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| 551 | } |
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| 552 | |||
| 553 | /** |
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| 554 | * @param DefinitionInterface[] $definitions |
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| 555 | * @return array |
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| 556 | */ |
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| 557 | protected function printMany(array $definitions): array |
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| 562 | } |
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| 563 | } |
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| 564 |
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