Class: GtmOnRails::DataLayer

Inherits:
Object
  • Object
show all
Includes:
ActionView::Helpers::TagHelper
Defined in:
lib/gtm_on_rails/models/data_layer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ DataLayer

Returns a new instance of DataLayer.



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# File 'lib/gtm_on_rails/models/data_layer.rb', line 8

def initialize(*args)
  options  = args.extract_options!
  @objects = args # @objects are instances of GTM::DataLayerObject
end

Instance Attribute Details

#objects ⇒ Object (readonly)

Returns the value of attribute objects.



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# File 'lib/gtm_on_rails/models/data_layer.rb', line 6

def objects
  @objects
end

Instance Method Details



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# File 'lib/gtm_on_rails/models/data_layer.rb', line 25

def print_on_js
  js_codes = []

  js_codes << "var dataLayer = dataLayer || [];"
  @objects.each do |data_layer_object|
    # dataLayer size limit exception
    size = data_layer_object.to_json.bytesize
    if size > GtmOnRails.config.data_layer_limit_byte_size
      raise ArgumentError.new("DataLayer bytesize is over limit #{GtmOnRails.config.data_layer_limit_byte_size} bytes. Size is #{size} bytes.")
    end

    js_codes << data_layer_object.to_js
  end

  return content_tag(:script, js_codes.join.html_safe)
end

#push(objects) ⇒ Object 



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# File 'lib/gtm_on_rails/models/data_layer.rb', line 13

def push(objects)
  objects = [objects].flatten
  objects.each do |object|
    case object
    when Hash
      @objects << GtmOnRails::DataLayerObject.new(object)
    when GtmOnRails::DataLayerObject
      @objects << object
    end 
  end
end