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# frozen_string_literal: true
module LazyImageTagHelper
include PreferencesHelper
def placeholder_image
"data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
end
# Override the default ActionView `image_tag` helper to support lazy-loading
def image_tag(source, options = {})
source = options[:dark_variant] if options[:dark_variant] && user_application_dark_mode?
options = options.symbolize_keys
unless options.delete(:lazy) == false
options[:data] ||= {}
options[:data][:src] = path_to_image(source)
# options[:class] can be either String or Array.
klass_opts = Array.wrap(options[:class])
klass_opts << "lazy"
options[:class] = klass_opts.join(' ')
source = placeholder_image
end
super(source, options)
end
# Required for Banzai::Filter::ImageLazyLoadFilter
module_function :placeholder_image # rubocop: disable Style/AccessModifierDeclarations
end
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