92 lines
2.9 KiB
Ruby
92 lines
2.9 KiB
Ruby
require 'set'
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module Travis::API::V3
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class Renderer::ModelRenderer
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REDUNDANT = Object.new
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private_constant :REDUNDANT
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def self.type(type = false)
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@type = type if type != false
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@type = name[/[^:]+$/].underscore.to_sym unless defined? @type # allows setting type to nil
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@type
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end
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def self.representation(name, *fields)
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fields.each do |field|
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class_eval "def #{field}; @model.#{field}; end" unless method_defined?(field)
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available_attributes << field.to_s
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end
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representations[name] ||= []
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representations[name] += fields
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end
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@representations = {}
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def self.representations
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@representations ||= superclass.representations.dup
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end
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@available_attributes = Set.new
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def self.available_attributes
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@available_attributes ||= superclass.available_attributes.dup
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end
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def self.render(model, representation = :standard, **options)
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new(model, **options).render(representation)
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end
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attr_reader :model, :options, :script_name, :include, :included
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attr_writer :href
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def initialize(model, script_name: nil, include: [], included: [], **options)
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@model = model
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@options = options
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@script_name = script_name
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@include = include
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@included = included
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end
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def href
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return @href if defined? @href # allows setting href to nil
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return unless self.class.type and model.respond_to? :attributes
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@href = Renderer.href(self.class.type, model.attributes, script_name: script_name)
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end
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def include?(field)
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field = "#{self.class.type}.#{field}" if field.is_a? Symbol
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include.include?(field)
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end
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def render(representation)
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if included.include? model
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return REDUNDANT unless href
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return { :@href => href }
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end
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result = {}
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result[:@type] = self.class.type if self.class.type
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result[:@href] = href if href
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fields = self.class.representations.fetch(representation)
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nested_included = included + [model]
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modes = {}
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excepted_type = result[:@type].to_s if include.any?
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include.each do |qualified_field|
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raise WrongParams, 'illegal format for include parameter'.freeze unless /\A(?<prefix>\w+)\.(?<field>\w+)\Z$/ =~ qualified_field
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next if prefix != excepted_type
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raise WrongParams, 'no field %p to include'.freeze % qualified_field unless self.class.available_attributes.include?(field)
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field &&= field.to_sym
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fields << field unless fields.include?(field)
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modes[field] = :standard
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end
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fields.each do |field|
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value = Renderer.render_value(send(field), script_name: script_name, include: include, included: nested_included, mode: modes[field])
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result[field] = value unless value == REDUNDANT
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end
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result
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end
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end
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end
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