class Livery::Presenter
Attributes
resource[R]
Public Class Methods
formatted_datetime(*names)
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# File lib/livery/presenter.rb, line 14 def formatted_datetime(*names) names.each do |name| define_method name do value = @resource.public_send(name) I18n.l(value) end end end
method_added(sym)
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# File lib/livery/presenter.rb, line 23 def method_added(sym) raise "can't override resource on a subclass of Presenter" if sym == :resource end
new(resource, options = {})
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# File lib/livery/presenter.rb, line 5 def initialize(resource, options = {}) @resource = resource options.each do |k, v| raise ArgumentError, "cannot initialize `resource` variable" if k.to_s == "resource" instance_variable_set("@#{k}", v) end end
presenter_association(*names, source: nil, namespace: nil)
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# File lib/livery/presenter.rb, line 27 def presenter_association(*names, source: nil, namespace: nil) raise ArgumentError, '`source` must be a block' unless source.nil? || source.is_a?(Proc) names.each do |name| instance_variable_name = "@#{name}".to_sym define_method name do return instance_variable_get(instance_variable_name) if instance_variable_defined?(instance_variable_name) association_resource = source.nil? ? @resource.public_send(name) : @resource.instance_exec(&source) association_presenter = Presenter.to_presenter(association_resource, namespace: namespace) instance_variable_set(instance_variable_name, association_presenter) association_presenter end end end
presenterize(klass, namespace: nil)
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# File lib/livery/presenter.rb, line 46 def presenterize(klass, namespace: nil) presenter_klass_string = [namespace, "#{klass}Presenter"].compact.join('::') ActiveSupport::Inflector.constantize(presenter_klass_string) end
resource(sym)
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# File lib/livery/presenter.rb, line 51 def resource(sym) define_method sym do @resource end end
to_presenter(object, namespace: nil)
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# File lib/livery/presenter.rb, line 57 def to_presenter(object, namespace: nil) return object.map { |o| to_presenter_single(o, namespace: namespace) } if object.is_a?(Enumerable) to_presenter_single(object, namespace: namespace) end
Private Class Methods
to_presenter_single(object, namespace: nil)
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# File lib/livery/presenter.rb, line 64 def to_presenter_single(object, namespace: nil) return nil if object.nil? klass = object.class if klass < Presenter object else presenterize(klass, namespace: namespace).new(object) end end
Public Instance Methods
t(*args)
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# File lib/livery/presenter.rb, line 77 def t(*args) I18n.t(resolve_i18n_path(args.shift), *args) end
t!(*args)
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# File lib/livery/presenter.rb, line 81 def t!(*args) I18n.t!(resolve_i18n_path(args.shift), *args) end
to_model()
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# File lib/livery/presenter.rb, line 85 def to_model raise 'Presenter objects should not be used for forms. Call .resource on this Presenter' end
to_param(*args)
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# File lib/livery/presenter.rb, line 89 def to_param(*args) @resource.to_param(*args) end
Private Instance Methods
resolve_i18n_path(key)
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# File lib/livery/presenter.rb, line 95 def resolve_i18n_path(key) if key[0] != '.' key else ActiveSupport::Inflector.underscore(self.class.name).tr('/', '.') + key end end