uhlryk / extensioner Goto Github PK

compose function is responsible for building one response from multiple events listeners.

If multiple modules responds to event and each will return value. Compose function decide if response will be array of single responses or one object built from all single responses

1. create event

const eventCaller = createEventCaller(eventName [, composeFunction])

2. call event

eventCaller(initValue)

It is something what is stored in manager

asyncMap and syncMap
Both return object where key is extensionName and value is event listener handler value

It will be another property with array list of modules names.
Extensioner will check for each module if he has registered its dependencies mudules. Otherwise it will throw error

• list - each extension can only add new response element. It should allow to set priority
• reduce - one response and each extension can change it
• find - first extension will give response

Accept multiple properties and returns an object where keys are extensions name and value is an object with keys as properties names and values are properties values. Will return only from extensions where all properties are available

This object is share between all callbacks triggered by event, and is returned from event emitter.