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Contents
module Blacklight
# Create <link rel="alternate"> links from a documents dynamically
class LinkAlternatePresenter
include ActionView::Helpers::OutputSafetyHelper
include ActionView::Helpers::TagHelper
def initialize(view_context, document, options)
@view_context = view_context
@document = document
@options = { unique: false, exclude: [] }.merge(options)
end
attr_reader :view_context, :document, :options
# Renders links to alternate representations
# provided by export formats. Returns empty string if no links available.
def render
seen = Set.new
safe_join(document.export_formats.map do |format, spec|
next if options[:exclude].include?(format) || (options[:unique] && seen.include?(spec[:content_type]))
seen.add(spec[:content_type])
tag(:link, rel: "alternate", title: format, type: spec[:content_type], href: href(format))
end.compact, "\n")
end
def href(format)
view_context.polymorphic_url(view_context.search_state.url_for_document(document), format: format)
end
end
end
Version data entries
25 entries across 25 versions & 1 rubygems