ByJG\ApiTools\Base\Body

Complexity

Total Complexity

47

Size/Duplication

Total Lines	334
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	6

Importance

Changes

0

11 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	10	2
A	getInstance()	0	12	3
	match()	0	1	?
A	matchString()	0	12	4
A	matchNumber()	0	12	5
A	matchBool()	0	12	4
A	matchArray()	0	14	4
B	matchTypes()	0	45	5
B	matchObjectProperties()	0	54	10
B	matchSchema()	0	34	7
A	matchNull()	0	15	3

<?php

namespace ByJG\ApiTools\Base;

use ByJG\ApiTools\Exception\DefinitionNotFoundException;
use ByJG\ApiTools\Exception\GenericSwaggerException;
use ByJG\ApiTools\Exception\InvalidDefinitionException;
use ByJG\ApiTools\Exception\InvalidRequestException;
use ByJG\ApiTools\Exception\NotMatchedException;
use ByJG\ApiTools\OpenApi\OpenApiResponseBody;
use ByJG\ApiTools\OpenApi\OpenApiSchema;
use ByJG\ApiTools\Swagger\SwaggerResponseBody;
use ByJG\ApiTools\Swagger\SwaggerSchema;
use InvalidArgumentException;

abstract class Body
{
    const SWAGGER_PROPERTIES="properties";
    const SWAGGER_REQUIRED="required";

    /**
     * @var Schema
     */
    protected $schema;

    protected $structure;

    protected $name;

    /**
     * OpenApi 2.0 does not describe null values, so this flag defines,
     * if match is ok when one of property, which has type, is null
     *
     * @var bool
     */
    protected $allowNullValues;

    /**
     * Body constructor.
     *
     * @param Schema $schema
     * @param string $name
     * @param array $structure
     * @param bool $allowNullValues
     */
    public function __construct(Schema $schema, $name, $structure, $allowNullValues = false)
    {
        $this->schema = $schema;
        $this->name = $name;
        if (!is_array($structure)) {
            throw new InvalidArgumentException('I expected the structure to be an array');
        }
        $this->structure = $structure;
        $this->allowNullValues = $allowNullValues;
    }

    /**
     * @param Schema $schema
     * @param $name
     * @param $structure
     * @param bool $allowNullValues
     * @return OpenApiResponseBody|SwaggerResponseBody
     * @throws GenericSwaggerException
     */
    public static function getInstance(Schema $schema, $name, $structure, $allowNullValues = false)
    {
        if ($schema instanceof SwaggerSchema) {
            return new SwaggerResponseBody($schema, $name, $structure, $allowNullValues);
        }

        if ($schema instanceof OpenApiSchema) {
            return new OpenApiResponseBody($schema, $name, $structure, $allowNullValues);
        }

        throw new GenericSwaggerException("Cannot get instance SwaggerBody or SchemaBody from " . get_class($schema));
    }

    abstract public function match($body);

    /**
     * @param $name
     * @param $schema
     * @param $body
     * @param $type
     * @return bool
     * @throws NotMatchedException
     */
    protected function matchString($name, $schema, $body, $type)
    {
        if ($type !== 'string') {
            return null;
        }

        if (isset($schema['enum']) && !in_array($body, $schema['enum'])) {
            throw new NotMatchedException("Value '$body' in '$name' not matched in ENUM. ", $this->structure);
        }

        return true;
    }

    /**
     * @param $name
     * @param $body
     * @param $type
     * @return bool
     * @throws NotMatchedException
     */
    protected function matchNumber($name, $body, $type)
    {
        if ($type !== 'integer' && $type !== 'float' && $type !== 'number') {
            return null;
        }

        if (!is_numeric($body)) {
            throw new NotMatchedException("Expected '$name' to be numeric, but found '$body'. ", $this->structure);
        }

        return true;
    }

    /**
     * @param $name
     * @param $body
     * @param $type
     * @return bool
     * @throws NotMatchedException
     */
    protected function matchBool($name, $body, $type)
    {
        if ($type !== 'bool' && $type !== 'boolean') {
            return null;
        }

        if (!is_bool($body)) {
            throw new NotMatchedException("Expected '$name' to be boolean, but found '$body'. ", $this->structure);
        }

        return true;
    }

    /**
     * @param $name
     * @param $schema
     * @param $body
     * @param $type
     * @return bool
     * @throws DefinitionNotFoundException
     * @throws GenericSwaggerException
     * @throws InvalidDefinitionException
     * @throws InvalidRequestException
     * @throws NotMatchedException
     */
    protected function matchArray($name, $schema, $body, $type)
    {
        if ($type !== 'array') {
            return null;
        }

        foreach ((array)$body as $item) {
            if (!isset($schema['items'])) {  // If there is no type , there is no test.
                continue;
            }
            $this->matchSchema($name, $schema['items'], $item);
        }
        return true;
    }

    protected function matchTypes($name, $schema, $body)
    {
        if (!isset($schema['type'])) {
            return null;
        }

        $type = $schema['type'];
        $nullable = isset($schema['nullable']) ? (bool)$schema['nullable'] : $this->schema->isAllowNullValues();

        $validators = [
            function () use ($name, $body, $type, $nullable)
            {
                return $this->matchNull($name, $body, $type, $nullable);
            },

            function () use ($name, $schema, $body, $type)
            {
                return $this->matchString($name, $schema, $body, $type);
            },

            function () use ($name, $body, $type)
            {
                return $this->matchNumber($name, $body, $type);
            },

            function () use ($name, $body, $type)
            {
                return $this->matchBool($name, $body, $type);
            },

            function () use ($name, $schema, $body, $type)
            {
                return $this->matchArray($name, $schema, $body, $type);
            }
        ];

        foreach ($validators as $validator) {
            $result = $validator();
            if (!is_null($result)) {
                return $result;
            }
        }

        return null;
    }

    /**
     * @param $name
     * @param $schema
     * @param $body
     * @return bool|null
     * @throws DefinitionNotFoundException
     * @throws GenericSwaggerException
     * @throws InvalidDefinitionException
     * @throws InvalidRequestException
     * @throws NotMatchedException
     */
    public function matchObjectProperties($name, $schema, $body)
    {
        if (!isset($schema[self::SWAGGER_PROPERTIES])) {
            return null;
        }

        if (!is_array($body)) {
            throw new InvalidRequestException(
                "I expected an array here, but I got an string. Maybe you did wrong request?",
                $body
            );
        }

        if (!isset($schema[self::SWAGGER_REQUIRED])) {
            $schema[self::SWAGGER_REQUIRED] = [];
        }
        foreach ($schema[self::SWAGGER_PROPERTIES] as $prop => $def) {
            $required = array_search($prop, $schema[self::SWAGGER_REQUIRED]);

            if (!array_key_exists($prop, $body)) {
                if ($required !== false) {
                    throw new NotMatchedException("Required property '$prop' in '$name' not found in object");
                }
                unset($body[$prop]);
                continue;
            }

            $this->matchSchema($prop, $def, $body[$prop]);
            unset($schema[self::SWAGGER_PROPERTIES][$prop]);
            if ($required !== false) {
                unset($schema[self::SWAGGER_REQUIRED][$required]);
            }
            unset($body[$prop]);
        }

        if (count($schema[self::SWAGGER_REQUIRED]) > 0) {
            throw new NotMatchedException(
                "The required property(ies) '"
                . implode(', ', $schema[self::SWAGGER_REQUIRED])
                . "' does not exists in the body.",
                $this->structure
            );
        }

        if (count($body) > 0) {
            throw new NotMatchedException(
                "The property(ies) '"
                . implode(', ', array_keys($body))
                . "' has not defined in '$name'",
                $body
            );
        }
        return true;
    }

    /**
     * @param string $name
     * @param $schema
     * @param array $body
     * @return bool
     * @throws DefinitionNotFoundException
     * @throws InvalidDefinitionException
     * @throws GenericSwaggerException
     * @throws InvalidRequestException
     * @throws NotMatchedException
     */
    protected function matchSchema($name, $schema, $body)
    {
        // Match Single Types
        if ($this->matchTypes($name, $schema, $body)) {
            return true;
        }

        if(!isset($schema['$ref']) && isset($schema['content'])) {
            $schema['$ref'] = $schema['content'][key($schema['content'])]['schema']['$ref'];
        }

        // Get References and try to match it again
        if (isset($schema['$ref'])) {
            $defintion = $this->schema->getDefinition($schema['$ref']);
            return $this->matchSchema($schema['$ref'], $defintion, $body);
        }

        // Match object properties
        if ($this->matchObjectProperties($name, $schema, $body)) {
            return true;
        }

        /**
         * OpenApi 2.0 does not describe ANY object value
         * But there is hack that makes ANY object possible, described in link below
         * To make that hack works, we need such condition
         * @link https://stackoverflow.com/questions/32841298/swagger-2-0-what-schema-to-accept-any-complex-json-value
         */
        if ($schema === []) {
            return true;
        }

        throw new GenericSwaggerException("Not all cases are defined. Please open an issue about this. Schema: $name");
    }

    /**
     * @param $name
     * @param $body
     * @param $type
     * @param $nullable
     * @return bool
     * @throws NotMatchedException
     */
    protected function matchNull($name, $body, $type, $nullable)
    {
        if (!is_null($body)) {
            return null;
        }

        if (!$nullable) {
            throw new NotMatchedException(
                "Value of property '$name' is null, but should be of type '$type'",
                $this->structure
            );
        }

        return true;
    }
}