forked from mirrors/action-gh-release
38 lines
1.4 KiB
CoffeeScript
38 lines
1.4 KiB
CoffeeScript
class Events
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constructor: (@instance) ->
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@_events = {}
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if @instance.on? or @instance.once? or @instance.removeAllListeners?
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throw new Error "An Emitter already exists for this object"
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@instance.on = (name, cb) => @_addListener name, "many", cb
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@instance.once = (name, cb) => @_addListener name, "once", cb
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@instance.removeAllListeners = (name=null) =>
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if name? then delete @_events[name] else @_events = {}
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_addListener: (name, status, cb) ->
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@_events[name] ?= []
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@_events[name].push {cb, status}
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@instance
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listenerCount: (name) ->
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if @_events[name]? then @_events[name].length else 0
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trigger: (name, args...) ->
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try
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if name != "debug" then @trigger "debug", "Event triggered: #{name}", args
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return unless @_events[name]?
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@_events[name] = @_events[name].filter (listener) -> listener.status != "none"
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promises = @_events[name].map (listener) =>
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return if listener.status == "none"
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if listener.status == "once" then listener.status = "none"
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try
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returned = listener.cb?(args...)
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if typeof returned?.then == "function"
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await returned
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else
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returned
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catch e
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if "name" != "error" then @trigger "error", e
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null
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(await Promise.all promises).find (x) -> x?
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catch e
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if "name" != "error" then @trigger "error", e
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null
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module.exports = Events
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