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<?php |
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namespace Distilleries\Messenger\Http\Controllers\Base; |
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/** |
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* Created by PhpStorm. |
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* User: mfrancois |
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* Date: 12/08/2016 |
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* Time: 15:10 |
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*/ |
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use Distilleries\Messenger\Contracts\MessengerReceiverContract; |
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use \Log; |
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use Illuminate\Http\Request; |
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trait WebHookBaseTrait |
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{ |
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public function getValidHook(Request $request) |
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{ |
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$hub = $request->input('hub_mode'); |
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$verify_token = $request->input('hub_verify_token'); |
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if ($hub === 'subscribe' && urldecode($verify_token) === config('messenger.validation_token')) { |
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return response($request->get('hub_challenge')); |
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} else { |
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return abort(403); |
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} |
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} |
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public function postMessage(Request $request, MessengerReceiverContract $messenger) |
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{ |
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$object = $request->input('object'); |
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if (empty($object)) { |
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return abort(403); |
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} |
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if ($object == 'page') { |
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$entry = $request->input('entry'); |
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$entry = json_decode(json_encode($entry), false); |
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if (empty($entry) || !is_array($entry)) { |
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return abort(403); |
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} |
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$result = ""; |
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foreach ($entry as $pageEntry) { |
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if (!is_array($pageEntry->messaging)) { |
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continue; |
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} |
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foreach ($pageEntry->messaging as $messagingEvent) { |
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if (!empty($messagingEvent->optin)) { |
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$result .= $messenger->receivedAuthentication($messagingEvent); |
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} else { |
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if (!empty($messagingEvent->message)) { |
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$result .= $messenger->receivedMessage($messagingEvent); |
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} else { |
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if (!empty($messagingEvent->delivery)) { |
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$result .= $messenger->receivedDeliveryConfirmation($messagingEvent); |
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} else { |
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if (!empty($messagingEvent->postback)) { |
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$result .= $messenger->receivedPostback($messagingEvent); |
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} else { |
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$result .= $messenger->defaultHookUndefinedAction($messagingEvent); |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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return response($result); |
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} |
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} |
Distilleries /
Messenger
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: