New Library

1 files changed, 179 insertions, 0 deletions

diff --git a/server/vendor/php-opencloud/common/src/Common/Error/Builder.php b/server/vendor/php-opencloud/common/src/Common/Error/Builder.php
new file mode 100644
index 0000000..e3ccdfe
--- /dev/null
+++ b/server/vendor/php-opencloud/common/src/Common/Error/Builder.php
@@ -0,0 +1,179 @@
+<?php
+
+namespace OpenCloud\Common\Error;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\ClientException;
+use Psr\Http\Message\MessageInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Class responsible for building meaningful exceptions. For HTTP problems, it produces a {@see HttpError}
+ * exception, and supplies a error message with reasonable defaults. For user input problems, it produces a
+ * {@see UserInputError} exception. For both, the problem is described, a potential solution is offered and
+ * a link to further information is included.
+ *
+ * @package OpenCloud\Common\Error
+ */
+class Builder
+{
+    /**
+     * The default domain to use for further link documentation.
+     *
+     * @var string
+     */
+    private $docDomain = 'http://docs.php-opencloud.com/en/latest/';
+
+    /**
+     * The HTTP client required to validate the further links.
+     *
+     * @var ClientInterface
+     */
+    private $client;
+
+    /**
+     * @param ClientInterface $client
+     */
+    public function __construct(ClientInterface $client = null)
+    {
+        $this->client = $client ?: new Client();
+    }
+
+    /**
+     * Internal method used when outputting headers in the error description.
+     *
+     * @param $name
+     *
+     * @return string
+     */
+    private function header($name)
+    {
+        return sprintf("%s\n%s\n", $name, str_repeat('~', strlen($name)));
+    }
+
+    /**
+     * Before outputting custom links, it is validated to ensure that the user is not
+     * directed off to a broken link. If a 404 is detected, it is hidden.
+     *
+     * @param $link The proposed link
+     *
+     * @return bool
+     */
+    private function linkIsValid($link)
+    {
+        $link = $this->docDomain . $link;
+
+        try {
+            return $this->client->request('HEAD', $link)->getStatusCode() < 400;
+        } catch (ClientException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * @param MessageInterface $message
+     *
+     * @codeCoverageIgnore
+     * @return string
+     */
+    public function str(MessageInterface $message)
+    {
+        if ($message instanceof RequestInterface) {
+            $msg = trim($message->getMethod() . ' '
+                    . $message->getRequestTarget())
+                . ' HTTP/' . $message->getProtocolVersion();
+            if (!$message->hasHeader('host')) {
+                $msg .= "\r\nHost: " . $message->getUri()->getHost();
+            }
+        } elseif ($message instanceof ResponseInterface) {
+            $msg = 'HTTP/' . $message->getProtocolVersion() . ' '
+                . $message->getStatusCode() . ' '
+                . $message->getReasonPhrase();
+        }
+
+        foreach ($message->getHeaders() as $name => $values) {
+            $msg .= "\r\n{$name}: " . implode(', ', $values);
+        }
+
+        if ($message->getBody()->getSize() < ini_get('memory_limit')) {
+            $msg .= "\r\n\r\n" . $message->getBody();
+        }
+
+        return $msg;
+    }
+
+    /**
+     * Helper method responsible for constructing and returning {@see BadResponseError} exceptions.
+     *
+     * @param RequestInterface  $request  The faulty request
+     * @param ResponseInterface $response The error-filled response
+     *
+     * @return BadResponseError
+     */
+    public function httpError(RequestInterface $request, ResponseInterface $response)
+    {
+        $message = $this->header('HTTP Error');
+
+        $message .= sprintf("The remote server returned a \"%d %s\" error for the following transaction:\n\n",
+            $response->getStatusCode(), $response->getReasonPhrase());
+
+        $message .= $this->header('Request');
+        $message .= trim($this->str($request)) . PHP_EOL . PHP_EOL;
+
+        $message .= $this->header('Response');
+        $message .= trim($this->str($response)) . PHP_EOL . PHP_EOL;
+
+        $message .= $this->header('Further information');
+        $message .= $this->getStatusCodeMessage($response->getStatusCode());
+
+        $message .= "Visit http://docs.php-opencloud.com/en/latest/http-codes for more information about debugging "
+            . "HTTP status codes, or file a support issue on https://github.com/php-opencloud/openstack/issues.";
+
+        $e = new BadResponseError($message);
+        $e->setRequest($request);
+        $e->setResponse($response);
+
+        return $e;
+    }
+
+    private function getStatusCodeMessage($statusCode)
+    {
+        $errors = [
+            400 => 'Please ensure that your input values are valid and well-formed. ',
+            401 => 'Please ensure that your authentication credentials are valid. ',
+            404 => "Please ensure that the resource you're trying to access actually exists. ",
+            500 => 'Please try this operation again once you know the remote server is operational. ',
+        ];
+
+        return isset($errors[$statusCode]) ? $errors[$statusCode] : '';
+    }
+
+    /**
+     * Helper method responsible for constructing and returning {@see UserInputError} exceptions.
+     *
+     * @param string      $expectedType The type that was expected from the user
+     * @param mixed       $userValue    The incorrect value the user actually provided
+     * @param string|null $furtherLink  A link to further information if necessary (optional).
+     *
+     * @return UserInputError
+     */
+    public function userInputError($expectedType, $userValue, $furtherLink = null)
+    {
+        $message = $this->header('User Input Error');
+
+        $message .= sprintf("%s was expected, but the following value was passed in:\n\n%s\n",
+            $expectedType, print_r($userValue, true));
+
+        $message .= "Please ensure that the value adheres to the expectation above. ";
+
+        if ($furtherLink && $this->linkIsValid($furtherLink)) {
+            $message .= sprintf("Visit %s for more information about input arguments. ", $this->docDomain . $furtherLink);
+        }
+
+        $message .= 'If you run into trouble, please open a support issue on https://github.com/php-opencloud/openstack/issues.';
+
+        return new UserInputError($message);
+    }
+}