scratch – Blame information for rev 122
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Rev | Author | Line No. | Line |
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120 | office | 1 | <?php |
2 | |||
3 | /* |
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4 | * This file is part of Evenement. |
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5 | * |
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6 | * (c) Igor Wiedler <igor@wiedler.ch> |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |||
12 | namespace Evenement; |
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13 | |||
14 | trait EventEmitterTrait |
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15 | { |
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16 | protected $listeners = []; |
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17 | |||
18 | public function on($event, callable $listener) |
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19 | { |
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20 | if (!isset($this->listeners[$event])) { |
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21 | $this->listeners[$event] = []; |
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22 | } |
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23 | |||
24 | $this->listeners[$event][] = $listener; |
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25 | } |
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26 | |||
27 | public function once($event, callable $listener) |
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28 | { |
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29 | $onceListener = function () use (&$onceListener, $event, $listener) { |
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30 | $this->removeListener($event, $onceListener); |
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31 | |||
32 | call_user_func_array($listener, func_get_args()); |
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33 | }; |
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34 | |||
35 | $this->on($event, $onceListener); |
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36 | } |
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37 | |||
38 | public function removeListener($event, callable $listener) |
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39 | { |
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40 | if (isset($this->listeners[$event])) { |
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41 | if (false !== $index = array_search($listener, $this->listeners[$event], true)) { |
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42 | unset($this->listeners[$event][$index]); |
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43 | } |
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44 | } |
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45 | } |
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46 | |||
47 | public function removeAllListeners($event = null) |
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48 | { |
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49 | if ($event !== null) { |
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50 | unset($this->listeners[$event]); |
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51 | } else { |
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52 | $this->listeners = []; |
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53 | } |
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54 | } |
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55 | |||
56 | public function listeners($event) |
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57 | { |
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58 | return isset($this->listeners[$event]) ? $this->listeners[$event] : []; |
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59 | } |
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60 | |||
61 | public function emit($event, array $arguments = []) |
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62 | { |
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63 | foreach ($this->listeners($event) as $listener) { |
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64 | call_user_func_array($listener, $arguments); |
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65 | } |
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66 | } |
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67 | } |