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<?php |
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use einfach\operation\Railway; |
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use einfach\operation\Result; |
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use function einfach\operation\response\ok; |
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use function einfach\operation\response\error; |
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class UpdateOperation implements \einfach\operation\IOperation |
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{ |
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public function railway() : Railway |
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{ |
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return (new Railway) |
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->step(function ($params) { |
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echo "Hey {$params['name']}. Say hello to anonymous function!"; |
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//return error('Early fail'); |
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return ok(['newParam' => 'newValue']); |
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}) |
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->step([$this, 'nestedRailway']) |
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->step([$this, 'castRequest']) |
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->step([$this, 'validateRequest']) |
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->step([$this, 'findUser']) |
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->step([$this, 'updateDB']) |
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->tryCatch([$this, 'sendNotification']) |
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->always([$this, 'writeLog']) |
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->failure([$this, 'notifyAdmin']); |
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} |
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/** |
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* @param array $params |
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*/ |
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public function __invoke(array $params) : Result |
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{ |
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$result = $this->railway()->runWithParams($params); |
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return $result; |
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} |
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public function nestedRailway($params) |
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{ |
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return (new Railway) |
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->step(function ($params) { |
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//return error('Nested Railway failed!'); |
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return ok(['nestedRwParam' => 'nestedRwValue']); |
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}) |
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->runWithParams($params); |
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} |
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public function castRequest($params) |
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{ |
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return ok(); |
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} |
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public function validateRequest($params) |
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{ |
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return ok(); |
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} |
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public function findUser($params) |
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{ |
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// pretend I am doing a query |
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// $user = DB::findById($params['id']); |
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$user = (object) ['id' => 123, 'name' => 'Eugene', 'phone' => '111111']; |
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return ok(['model' => $user]); |
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//return error('User not found!'); |
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} |
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public function updateDB($params) |
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{ |
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return ok(); |
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} |
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public function sendNotification($params) |
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{ |
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//throw new \Exception("Hey there, Exception!"); |
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return ok(); |
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} |
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public function writeLog($params) |
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{ |
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} |
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public function notifyAdmin($params) |
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{ |
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} |
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} |
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/* |
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$castRequest = castRequest($request); // always success (one-way track) // Success |
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$validRequest = validateRequest($castRequest); // true or false (two ways tracks) // Step |
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$dbResult = updateDB($validRequest); // does not return (dead-end track) // Step |
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sendNotification($dbResult, $validRequest); // try catch // TryCatch |
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writeLog($dbResult, $validRequest); // supervisory (do smth for both tracks) // Proxy |
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render($dbResult, $validRequest); |
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*/ |
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// WRAPPER EXAMPLE WITH TRANSACTIONS |
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//->step(function ($params) use ($dbConn) { |
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// /** @var $pipe Pipe */ |
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// $params['dbConn'] = $dbConn; |
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// |
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// return Pipe::with($params) |
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// ->tryCatch(function ($params) { |
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// return $params['dbConn']->beginTransaction(); |
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// }) |
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// ->step(function ($params) { |
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// return $params['dbConn']->createCommand('SQL #1')->execute(); |
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// }) |
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// ->step(function ($params) { |
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// return $params['dbConn']->createCommand('SQL #2')->execute(); |
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// }) |
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// ->tryCatch(function ($params) { |
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// return $params['transaction']->commit(); |
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// }) |
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// ->fail(function ($params) { |
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// return $params['transaction']->rollBack(); |
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// }) |
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// ->run(); |
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//}) |
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iJackUA /
einfach-operation
Loading history...
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: