Created json_encode function which always maps to array and converts errors into exceptions

module/Common/functions/functions.php

@@ -3,8 +3,11 @@ declare(strict_types=1);
 
 namespace Shlinkio\Shlink\Common;
 
+use const JSON_ERROR_NONE;
 use function getenv;
 use function in_array;
+use function json_last_error;
+use function json_last_error_msg;
 use function strtolower;
 use function trim;
 
@@ -42,7 +45,17 @@ function env($key, $default = null)
     return trim($value);
 }
 
-function contains($needle, array $haystack)
+function contains($needle, array $haystack): bool
 {
     return in_array($needle, $haystack, true);
 }
+
+function json_decode(string $json, int $depth = 512, int $options = 0): array
+{
+    $data = \json_decode($json, true, $depth, $options);
+    if (JSON_ERROR_NONE !== json_last_error()) {
+        throw new Exception\InvalidArgumentException('Error decoding JSON: ' . json_last_error_msg());
+    }
+
+    return $data;
+}

module/Common/src/Exception/WrongIpException.php

@@ -3,10 +3,12 @@ declare(strict_types=1);
 
 namespace Shlinkio\Shlink\Common\Exception;
 
+use function sprintf;
+
 class WrongIpException extends RuntimeException
 {
     public static function fromIpAddress($ipAddress, \Throwable $prev = null): self
     {
-        return new self(\sprintf('Provided IP "%s" is invalid', $ipAddress), 0, $prev);
+        return new self(sprintf('Provided IP "%s" is invalid', $ipAddress), 0, $prev);
     }
 }

module/Common/src/Service/IpApiLocationResolver.php

@@ -5,7 +5,10 @@ namespace Shlinkio\Shlink\Common\Service;
 
 use GuzzleHttp\Client;
 use GuzzleHttp\Exception\GuzzleException;
+use Shlinkio\Shlink\Common\Exception\InvalidArgumentException;
 use Shlinkio\Shlink\Common\Exception\WrongIpException;
+use function Shlinkio\Shlink\Common\json_decode;
+use function sprintf;
 
 class IpApiLocationResolver implements IpLocationResolverInterface
 {
@@ -29,10 +32,12 @@ class IpApiLocationResolver implements IpLocationResolverInterface
     public function resolveIpLocation(string $ipAddress): array
     {
         try {
-            $response = $this->httpClient->get(\sprintf(self::SERVICE_PATTERN, $ipAddress));
-            return $this->mapFields(\json_decode((string) $response->getBody(), true));
+            $response = $this->httpClient->get(sprintf(self::SERVICE_PATTERN, $ipAddress));
+            return $this->mapFields(json_decode((string) $response->getBody()));
         } catch (GuzzleException $e) {
             throw WrongIpException::fromIpAddress($ipAddress, $e);
+        } catch (InvalidArgumentException $e) {
+            throw new WrongIpException('IP-API returned invalid body while locating IP address', 0, $e);
         }
     }
 

module/Rest/src/Middleware/BodyParserMiddleware.php

@@ -8,15 +8,11 @@ use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
-use Shlinkio\Shlink\Rest\Exception\RuntimeException;
 use function array_shift;
 use function explode;
-use function json_decode;
-use function json_last_error;
-use function json_last_error_msg;
 use function parse_str;
 use function Shlinkio\Shlink\Common\contains;
-use function sprintf;
+use function Shlinkio\Shlink\Common\json_decode;
 use function trim;
 
 class BodyParserMiddleware implements MiddlewareInterface, RequestMethodInterface
@@ -67,7 +63,6 @@ class BodyParserMiddleware implements MiddlewareInterface, RequestMethodInterfac
     /**
      * @param Request $request
      * @return Request
-     * @throws RuntimeException
      */
     private function parseFromJson(Request $request): Request
     {
@@ -76,11 +71,7 @@ class BodyParserMiddleware implements MiddlewareInterface, RequestMethodInterfac
             return $request;
         }
 
-        $parsedJson = json_decode($rawBody, true);
-        if (json_last_error() !== JSON_ERROR_NONE) {
-            throw new RuntimeException(sprintf('Error when parsing JSON request body: %s', json_last_error_msg()));
-        }
-
+        $parsedJson = json_decode($rawBody);
         return $request->withParsedBody($parsedJson);
     }
 

module/Rest/test/Action/Tag/ListTagsActionTest.php

@@ -10,6 +10,7 @@ use Shlinkio\Shlink\Core\Entity\Tag;
 use Shlinkio\Shlink\Core\Service\Tag\TagServiceInterface;
 use Shlinkio\Shlink\Rest\Action\Tag\ListTagsAction;
 use Zend\Diactoros\ServerRequestFactory;
+use function Shlinkio\Shlink\Common\json_decode;
 
 class ListTagsActionTest extends TestCase
 {
@@ -42,7 +43,7 @@ class ListTagsActionTest extends TestCase
             'tags' => [
                 'data' => ['foo', 'bar'],
             ],
-        ], \json_decode((string) $resp->getBody(), true));
+        ], json_decode((string) $resp->getBody()));
         $listTags->shouldHaveBeenCalled();
     }
 }