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eventric

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behavior-first application development

github.com/efacilitation/eventric

efacilitation/eventric

49 lines (35 loc) • 1.17 kB
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class PubSub constructor: -> @_subscribers = [] @_subscriberId = 0 @_nextTick = (args...) -> setTimeout args... subscribe: (eventName, subscriberFn) -> new Promise (resolve, reject) => subscriber = eventName: eventName subscriberFn: subscriberFn subscriberId: @_getNextSubscriberId() @_subscribers.push subscriber resolve subscriber.subscriberId publish: (eventName, payload) -> new Promise (resolve, reject) => subscribers = @_getRelevantSubscribers eventName executeNextHandler = => if subscribers.length is 0 resolve() else subscribers.shift().subscriberFn payload, -> @_nextTick executeNextHandler, 0 @_nextTick executeNextHandler, 0 _getRelevantSubscribers: (eventName) -> if eventName @_subscribers.filter (x) -> x.eventName is eventName else @_subscribers unsubscribe: (subscriberId) -> new Promise (resolve, reject) => @_subscribers = @_subscribers.filter (x) -> x.subscriberId isnt subscriberId resolve() _getNextSubscriberId: -> @_subscriberId++ module.exports = PubSub