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<?php |
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namespace EmanueleMinotto\JsonSchemaFaker; |
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use Faker\Provider\Base; |
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use Faker\Provider\Lorem; |
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class JsonSchemaProvider |
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{ |
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public static function jsonSchemaContent(string $content) |
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{ |
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$schema = json_decode($content, true); |
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return static::jsonSchema($schema); |
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} |
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public static function jsonSchema(array $schema) |
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{ |
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if (!isset($schema['type']) && !empty($schema['enum'])) { |
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return array_rand(array_flip($schema['enum'])); |
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} |
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switch ($schema['type']) { |
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case 'string': |
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return static::fromString($schema); |
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case 'number': |
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return static::fromNumber($schema); |
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case 'integer': |
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return static::fromInteger($schema); |
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case 'boolean': |
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return static::fromBoolean($schema); |
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case 'array': |
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return static::fromArray($schema); |
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case 'object': |
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return static::fromObject($schema); |
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case 'null': |
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default: |
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return null; |
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} |
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} |
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private static function fromString(array $schema): string |
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{ |
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$output = ''; |
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if (isset($schema['pattern'])) { |
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$output = Base::regexify($schema['pattern']); |
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} |
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$minLength = max($schema['minLength'] ?? 1, 1); |
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$maxLength = min($schema['maxLength'] ?? 100, 100); |
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$max = max($minLength, $maxLength); |
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$output = $output ?: Lorem::text(max($max, 5)); |
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$output = substr($output, 0, $max); |
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$contentMediaType = $schema['contentMediaType'] ?? 'text/plain'; |
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$contentMediaType = in_array($contentMediaType, ['text/plain', 'application/json']) |
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? $contentMediaType |
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: 'text/plain'; |
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if ('application/json' === $contentMediaType) { |
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$output = json_encode($output); |
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} |
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$contentEncoding = $schema['contentEncoding'] ?? 'binary'; |
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$contentEncoding = in_array($contentEncoding, ['binary', 'base64']) |
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? $contentEncoding |
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: 'binary'; |
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if ('base64' === $contentEncoding) { |
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$output = base64_encode($output); |
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} |
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return $output; |
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} |
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private static function fromNumber(array $schema): float |
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{ |
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$minimum = $schema['minimum'] ?? 0; |
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if (isset($schema['exclusiveMinimum'])) { |
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if (true === $schema['exclusiveMinimum']) { |
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$minimum += 0.001; |
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} else { |
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$minimum = $schema['exclusiveMinimum']; |
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} |
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} |
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$maximum = $schema['maximum'] ?? PHP_INT_MAX; |
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if (isset($schema['exclusiveMaximum'])) { |
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if (true === $schema['exclusiveMaximum']) { |
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$maximum -= 0.001; |
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} else { |
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$maximum = $schema['exclusiveMaximum']; |
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} |
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} |
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$multipleOf = $schema['multipleOf'] ?? 1; |
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$output = Base::randomFloat(null, $minimum, $maximum / max($multipleOf, 1)); |
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if (1 !== $multipleOf) { |
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$output = $multipleOf * round($output); |
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} |
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return min(max($output, $minimum), $maximum); |
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} |
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private static function fromInteger(array $schema): int |
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{ |
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return round(static::fromNumber($schema)); |
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} |
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private static function fromBoolean(array $schema): bool |
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{ |
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return 1 === mt_rand(0, 1); |
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} |
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private static function fromArray(array $schema): array |
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{ |
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$minItems = max($schema['minItems'] ?? 0, 0); |
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$maxItems = min($schema['maxItems'] ?? 50, 50); |
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$uniqueItems = $schema['uniqueItems'] ?? false; |
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$items = $schema['items'] ?? []; |
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if (!isset($items[0]) && !empty($items)) { |
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$items = array_fill(0, max($minItems, 1), $items); |
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unset($schema['additionalItems'], $schema['contains']); |
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} |
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if (isset($schema['contains'])) { |
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$items = array_fill(0, max($minItems, 1), $schema['contains']); |
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} |
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if (isset($schema['additionalItems'])) { |
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$items += array_fill(count($items), max(0, $maxItems - count($items)), $schema['additionalItems']); |
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} |
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if (empty($items)) { |
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$type = array_rand(array_flip(['string', 'number', 'integer'])); |
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$items = array_fill(0, mt_rand($minItems, $maxItems), [ |
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'type' => $type, |
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]); |
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} |
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$data = []; |
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for ($i = 0; $i < count($items); ++$i) { |
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$value = static::jsonSchema($items[$i]); |
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if ($uniqueItems && in_array($value, $data, true)) { |
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--$i; |
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continue; |
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} |
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$data[] = $value; |
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} |
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return $data; |
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} |
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private static function fromObject(array $schema): \stdClass |
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{ |
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$object = new \stdClass(); |
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if (!empty($schema['properties'])) { |
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foreach ($schema['properties'] as $property => $subschema) { |
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if (0 === mt_rand(0, 1) && !in_array($property, $schema['required'] ?? [])) { |
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continue; |
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} |
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$object->{$property} = !is_bool($subschema) |
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? static::jsonSchema($subschema) |
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: static::getFromPatternProperties($property, $schema); |
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} |
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} |
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$minProperties = max($schema['minProperties'] ?? 0, 0); |
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if (0 !== $minProperties && count(get_object_vars($object)) < $minProperties) { |
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do { |
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$propertyName = isset($schema['propertyNames']) |
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? static::jsonSchema($schema['propertyNames']) |
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: Lorem::word(); |
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$object->{$propertyName} = static::getFromPatternProperties($propertyName, $schema); |
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} while (count(get_object_vars($object)) < $minProperties); |
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} |
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if (isset($schema['maxProperties']) && count(get_object_vars($object)) < $schema['maxProperties']) { |
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do { |
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$propertyName = isset($schema['propertyNames']) |
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? static::jsonSchema($schema['propertyNames']) |
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: Lorem::word(); |
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$object->{$propertyName} = static::getFromPatternProperties($propertyName, $schema); |
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} while (count(get_object_vars($object)) < mt_rand($minProperties, $schema['maxProperties'])); |
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} |
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foreach ($schema['required'] ?? [] as $property) { |
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if (!isset($object->{$property})) { |
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$object->{$property} = static::getFromPatternProperties($property, $schema); |
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} |
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} |
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return $object; |
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} |
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private static function getFromPatternProperties(string $property, array $schema) |
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{ |
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if (isset($schema['patternProperties'])) { |
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foreach ($schema['patternProperties'] as $key => $value) { |
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if (preg_match('/'.$key.'/', $property)) { |
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return static::jsonSchema($schema); |
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} |
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} |
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} |
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if (isset($schema['additionalProperties']) && !is_bool($schema['additionalProperties'])) { |
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return static::jsonSchema($schema['additionalProperties']); |
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} |
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return static::fromRandom(); |
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} |
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private static function fromRandom() |
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{ |
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$type = array_rand(array_flip(['string', 'number', 'integer'])); |
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return static::jsonSchema(['type' => $type]); |
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} |
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} |
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EmanueleMinotto /
json-schema-faker
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