yaks/lib/yaks/format/collection_json.rb
module Yaks
class Format
class CollectionJson < self
register :collection_json, :json, 'application/vnd.collection+json'
include FP
# @param [Yaks::Resource] resource
# @return [Hash]
def serialize_resource(resource)
result = {
version: "1.0",
items: serialize_items(resource)
}
result[:href] = resource.self_link.uri if resource.self_link
result[:links] = serialize_links(resource) if links?(resource)
result[:queries] = serialize_queries(resource) if queries?(resource)
result[:template] = serialize_template(resource) if template?(resource)
{collection: result}
end
# @param [Yaks::Resource] resource
# @return [Array]
def serialize_items(resource)
resource.seq.map do |item|
attrs = item.attributes.map do |name, value|
{
name: name,
value: value
}
end
result = {data: attrs}
result[:href] = item.self_link.uri if item.self_link
item.links.each do |link|
next if link.rel.equal? :self
result[:links] = [] unless result.key?(:links)
result[:links] << {rel: link.rel, href: link.uri}
result[:links].last[:name] = link.title if link.title
end
result
end
end
def serialize_links(resource)
resource.links.each_with_object([]) do |link, result|
result << {href: link.uri, rel: link.rel}
end
end
def serialize_queries(resource)
resource.forms.each_with_object([]) do |form, result|
next unless form_is_query? form
result << {rel: form.name, href: form.action}
result.last[:prompt] = form.title if form.title
form.fields_flat.each do |field|
result.last[:data] = [] unless result.last.key? :data
result.last[:data] << {name: field.name, value: nil.to_s}
result.last[:data].last[:prompt] = field.label if field.label
end
end
end
def queries?(resource)
resource.forms.any? { |f| form_is_query? f }
end
def links?(resource)
resource.collection? && resource.links.any?
end
def template?(resource)
options.key?(:template) && template_form_exists?(resource)
end
protected
def form_is_query?(form)
form.method?(:get) && form.has_action?
end
def template_form_exists?(resource)
!resource.find_form(options.fetch(:template)).nil?
end
def serialize_template(resource)
fields = resource.find_form(options.fetch(:template)).fields
result = {data: []}
fields.each do |field|
result[:data] << {name: field.name, value: nil.to_s}
result[:data].last[:prompt] = field.label if field.label
end
result
end
end
end
end