jasny /
controller
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| 1 | <?php |
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| 2 | |||
| 3 | namespace Jasny; |
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| 4 | |||
| 5 | use Psr\Http\Message\ServerRequestInterface; |
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| 6 | use Psr\Http\Message\ResponseInterface; |
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| 7 | |||
| 8 | /** |
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| 9 | * Controller |
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| 10 | */ |
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| 11 | abstract class Controller |
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| 12 | { |
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| 13 | /** |
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| 14 | * Server request |
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| 15 | * @var ServerRequestInterface |
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| 16 | **/ |
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| 17 | protected $request = null; |
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| 18 | |||
| 19 | /** |
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| 20 | * Response |
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| 21 | * @var ResponseInterface |
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| 22 | **/ |
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| 23 | protected $response = null; |
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| 24 | |||
| 25 | /** |
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| 26 | * Run the controller |
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| 27 | * |
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| 28 | * @return ResponseInterface |
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| 29 | */ |
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| 30 | abstract public function run(); |
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| 31 | |||
| 32 | /** |
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| 33 | * Get request, set for controller |
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| 34 | * |
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| 35 | * @return ServerRequestInterface |
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| 36 | */ |
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| 37 | 1 | public function getRequest() |
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| 38 | { |
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| 39 | 1 | return $this->request; |
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| 40 | } |
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| 41 | |||
| 42 | /** |
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| 43 | * Get response. set for controller |
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| 44 | * |
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| 45 | * @return ResponseInterface |
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| 46 | */ |
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| 47 | 16 | public function getResponse() |
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| 48 | { |
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| 49 | 16 | return $this->response; |
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| 50 | } |
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| 51 | |||
| 52 | /** |
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| 53 | * Run the controller as function |
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| 54 | * |
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| 55 | * @param ServerRequestInterface $request |
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| 56 | * @param ResponseInterface $response |
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| 57 | * @return ResponseInterface |
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| 58 | */ |
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| 59 | 14 | public function __invoke(ServerRequestInterface $request, ResponseInterface $response) |
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| 60 | { |
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| 61 | 14 | $this->request = $request; |
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| 62 | 14 | $this->response = $response; |
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| 63 | |||
| 64 | 14 | return $this->run(); |
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| 65 | } |
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| 66 | |||
| 67 | /** |
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| 68 | * Check if response is 2xx succesful, or empty |
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| 69 | * |
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| 70 | * @return boolean |
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| 71 | */ |
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| 72 | 14 | public function isSuccessful() |
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| 73 | { |
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| 74 | 14 | $code = $this->getResponseStatusCode(); |
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| 75 | |||
| 76 | 14 | return !$code || ($code >= 200 && $code < 300); |
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| 77 | } |
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| 78 | |||
| 79 | /** |
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| 80 | * Check if response is a 3xx redirect |
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| 81 | * |
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| 82 | * @return boolean |
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| 83 | */ |
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| 84 | 14 | public function isRedirection() |
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| 85 | { |
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| 86 | 14 | $code = $this->getResponseStatusCode(); |
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| 87 | |||
| 88 | 14 | return $code >= 300 && $code < 400; |
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| 89 | } |
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| 90 | |||
| 91 | /** |
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| 92 | * Check if response is a 4xx client error |
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| 93 | * |
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| 94 | * @return boolean |
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| 95 | */ |
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| 96 | 14 | public function isClientError() |
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| 97 | { |
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| 98 | 14 | $code = $this->getResponseStatusCode(); |
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| 99 | |||
| 100 | 14 | return $code >= 400 && $code < 500; |
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| 101 | } |
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| 102 | |||
| 103 | /** |
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| 104 | * Check if response is a 5xx redirect |
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| 105 | * |
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| 106 | * @return boolean |
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| 107 | */ |
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| 108 | 14 | public function isServerError() |
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| 109 | { |
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| 110 | 14 | return $this->getResponseStatusCode() >= 500; |
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| 111 | } |
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| 112 | |||
| 113 | /** |
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| 114 | * Check if response is 4xx or 5xx error |
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| 115 | * |
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| 116 | * @return boolean |
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| 117 | */ |
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| 118 | 13 | public function isError() |
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| 119 | { |
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| 120 | 13 | return $this->isClientError() || $this->isServerError(); |
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| 121 | } |
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| 122 | |||
| 123 | /** |
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| 124 | * Encode data to send to client |
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| 125 | * |
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| 126 | * @param mixed $data |
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| 127 | * @return string |
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| 128 | */ |
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| 129 | 13 | public function encodeData($data) |
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| 130 | { |
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| 131 | 13 | $response = $this->getResponse(); |
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| 132 | 13 | $invalid = !$response || |
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| 133 | 12 | !($type = $response->getHeaderLine('Content-Type')) || |
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| 134 | 13 | !in_array($type, ['application/json', 'text/xml', 'application/xml'], true); |
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| 135 | |||
| 136 | 13 | if ($invalid) { |
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| 137 | 6 | throw new \RuntimeException("Valid content type is not set in response for encoding data"); |
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| 138 | } |
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| 139 | |||
| 140 | switch ($type) { |
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| 141 | 7 | case 'application/json': |
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| 142 | 5 | return $this->encodeDataAsJson($data); |
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| 143 | 2 | case 'text/xml': |
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| 144 | 2 | case 'application/xml': |
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| 145 | 2 | return $this->encodeDataAsXml($data); |
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| 146 | } |
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| 147 | } |
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| 148 | |||
| 149 | /** |
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| 150 | * Encode data as xml |
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| 151 | * |
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| 152 | * @param \SimpleXMLElement $data |
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| 153 | * @return string |
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| 154 | */ |
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| 155 | 2 | protected function encodeDataAsXml(\SimpleXMLElement $data) |
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| 156 | { |
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| 157 | 2 | return $data->asXML(); |
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| 158 | } |
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| 159 | |||
| 160 | /** |
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| 161 | * Encode data as json |
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| 162 | * |
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| 163 | * @param mixed |
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| 164 | * @return string |
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| 165 | */ |
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| 166 | 5 | protected function encodeDataAsJson($data) |
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| 167 | { |
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| 168 | 5 | $data = json_encode($data); |
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| 169 | |||
| 170 | 5 | return $this->isJsonp() ? |
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| 171 | 5 | $this->getRequest()->getQueryParams()['callback'] . '(' . $data . ')' : |
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| 172 | 5 | $data; |
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| 173 | } |
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| 174 | |||
| 175 | /** |
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| 176 | * Check if we should respond with jsonp |
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| 177 | * |
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| 178 | * @return boolean |
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| 179 | */ |
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| 180 | 5 | protected function isJsonp() |
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| 181 | { |
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| 182 | 5 | $request = $this->getRequest(); |
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| 183 | |||
| 184 | 5 | return $request && !empty($request->getQueryParams()['callback']); |
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| 185 | } |
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| 186 | |||
| 187 | /** |
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| 188 | * Get status code of response |
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| 189 | * |
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| 190 | * @return int |
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| 191 | */ |
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| 192 | 14 | protected function getResponseStatusCode() |
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| 193 | { |
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| 194 | 14 | $response = $this->getResponse(); |
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| 195 | |||
| 196 | 14 | return $response ? $response->getStatusCode() : 0; |
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| 197 | } |
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| 198 | } |
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| 199 | |||
| 200 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: