b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
12 lines
No EOL
2.4 KiB
JavaScript
12 lines
No EOL
2.4 KiB
JavaScript
;(function(exports){'use strict';function ensureValidEventName(eventName){if(!eventName||typeof eventName!=='string'){throw new Error('Event name should be a valid non-empty string!');}}
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function ensureValidHandler(handler){if(typeof handler!=='function'){throw new Error('Handler should be a function!');}}
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function ensureAllowedEventName(allowedEvents,eventName){if(allowedEvents&&allowedEvents.indexOf(eventName)<0){throw new Error('Event "'+eventName+'" is not allowed!');}}
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var eventDispatcher={on:function(eventName,handler){ensureValidEventName(eventName);ensureAllowedEventName(this.allowedEvents,eventName);ensureValidHandler(handler);var handlers=this.listeners.get(eventName);if(!handlers){handlers=new Set();this.listeners.set(eventName,handlers);}
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handlers.add(handler);},once:function(eventName,handler){ensureValidHandler(handler);var once=(parameters)=>{eventDispatcher.off.call(this,eventName,once);handler(parameters);};eventDispatcher.on.call(this,eventName,once);},off:function(eventName,handler){ensureValidEventName(eventName);ensureAllowedEventName(this.allowedEvents,eventName);ensureValidHandler(handler);var handlers=this.listeners.get(eventName);if(!handlers){return;}
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handlers.delete(handler);if(!handlers.size){this.listeners.delete(eventName);}},offAll:function(eventName){if(typeof eventName==='undefined'){this.listeners.clear();return;}
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ensureValidEventName(eventName);ensureAllowedEventName(this.allowedEvents,eventName);var handlers=this.listeners.get(eventName);if(!handlers){return;}
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handlers.clear();this.listeners.delete(eventName);},emit:function(eventName,parameters){ensureValidEventName(eventName);ensureAllowedEventName(this.allowedEvents,eventName);var handlers=this.listeners.get(eventName);if(!handlers){return;}
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handlers.forEach(function(handler){try{handler(parameters);}catch(e){console.error(e);}});}};exports.EventDispatcher={mixin:function(target,allowedEvents){if(!target||typeof target!=='object'){throw new Error('Object to mix into should be valid object!');}
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if(typeof allowedEvents!=='undefined'&&!Array.isArray(allowedEvents)){throw new Error('Allowed events should be a valid array of strings!');}
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Object.keys(eventDispatcher).forEach(function(method){if(typeof target[method]!=='undefined'){throw new Error('Object to mix into already has "'+method+'" property defined!');}
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target[method]=eventDispatcher[method].bind(this);},{listeners:new Map(),allowedEvents:allowedEvents});return target;}};})(self); |