data-layer-events/index.coffee

Push clean events onto Google Tag Manager's dataLayer

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# A lil' util to push stuff to the dataLayer while unsetting previous values
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# String prepended to Google Analytics event properties
eventPrefix = 'generic'
eventName = eventPrefix + 'Event';

# Create the config for an event-type dataLayer object
createInteractionEvent = (category, action, label, value) ->
	event: eventName
	"#{eventPrefix}Category": category
	"#{eventPrefix}Action": action
	"#{eventPrefix}Label": label
	"#{eventPrefix}Value": value
	"#{eventPrefix}NonInteraction": false

# Push an event onto the dataLayer
push = (config) -> window.dataLayer.push config

# The API
module.exports =

	# Add event onto the dataLayer while nulling all existing
	event: (category, action, label = null, value = null, nonInteraction) ->
		push createInteractionEvent.apply null, arguments

	# Same as event,
	nonInteractionEvent: (category, action, label = null, value = null) ->
		config = createInteractionEvent.apply null, arguments
		config["#{eventPrefix}NonInteraction"] = true
		push config