56 lines
1.4 KiB
PHP
56 lines
1.4 KiB
PHP
<?php declare(strict_types=1);
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namespace Aviat\Kilo;
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class Event {
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use Traits\ConstList;
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// ------------------------------------------------------------------------
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// Valid Events
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// ------------------------------------------------------------------------
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public const INPUT_KEY = 'INPUT_KEY';
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public const PAGE_CHANGE = 'PAGE_CHANGE';
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public const MOVE_CURSOR = 'MOVE_CURSOR';
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public const QUIT_ATTEMPT = 'QUIT_ATTEMPT';
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// Mapping of events to handlers
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private static $subscribeMap = [];
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public static function fire(string $eventName, $value): void
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{
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static::validateEvent($eventName);
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if (array_key_exists($eventName, static::$subscribeMap))
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{
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foreach (static::$subscribeMap[$eventName] as $fn)
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{
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$fn($value);
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}
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}
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}
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public static function on(string $eventName, callable $fn): void
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{
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static::validateEvent($eventName);
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if ( ! array_key_exists($eventName, static::$subscribeMap))
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{
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static::$subscribeMap[$eventName] = [];
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}
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if ( ! in_array($fn, static::$subscribeMap[$eventName], TRUE))
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{
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static::$subscribeMap[$eventName][] = $fn;
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}
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}
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private static function validateEvent(string $eventName): void
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{
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$validEvents = self::getConstList();
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if ( ! array_key_exists($eventName, $validEvents))
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{
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throw new \InvalidArgumentException("Invalid event '{$eventName}'. Event const must exist in Aviat\\Kilo\\Event.");
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}
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}
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} |