Module: Characterize::FeatureControls

Defined in:
lib/characterize/feature_controls.rb

Instance Method Summary collapse

Instance Method Details

#each_with_features(collection, *mods, &block) ⇒ Object

Enumerate a collection with the given modules and block casting each object with the modules and uncasting the object afterward.

Examples:

def each_favorite(&block)
  each_with_feature(favorites, FavoriteMod, &block)
end

<%- user.each_favorite do |favorite| %>
  <%= favorite.special_feature %>
<%- end -%>



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# File 'lib/characterize/feature_controls.rb', line 17

def each_with_features(collection, *mods, &block)
  collection.lazy.each do |obj|
    obj.cast_as(*mods)
    block.call(obj)
    obj.uncast(mods.size)
  end
end

#with(method_name, *tag_name_or_options) ⇒ Object

Conditionally render content for the object.

Pass in a method name for content and either of:

1. options for Rails' content_tag
2. a block to render

Examples:

<%= user.with(:favorites, :p, class: 'favorites-details') %>
<%- user.with(:favorites) do %>
  <p class="favorites-details">
    My Favorite Things: <%= user.favorites.join(', ') %>
  </p>
<%- end -%>



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# File 'lib/characterize/feature_controls.rb', line 40

def with(method_name, *tag_name_or_options)
  value = self.public_send(method_name)
  if with_conditions(method_name, value)
    if block_given?
      yield
    else
      tag_name, options = *tag_name_or_options
      view.content_tag(tag_name, value, options)
    end
  else
    without_option = tag_name_or_options.last.fetch(:without){ '' }
    if without_option.respond_to?(:call)
      without(method_name, &without_option)
    else
      view.concat(without_option)
    end
  end
end

#with_conditions(method_name, computed_value) ⇒ Object

Used to override behavior of with for the case of special attributes



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# File 'lib/characterize/feature_controls.rb', line 79

def with_conditions(method_name, computed_value)
  !computed_value.nil? && computed_value != '' && computed_value != false
end

#without(method_name, &block) ⇒ Object

Conditionally render content for the object when the attribute is NOT present.

Pass in a method name and a block to render.

Examples:

<%- user.without(:favorites) do %>
  <p class="favorites-details none">
    There are no favorites here.
  </p>
<%- end -%>



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# File 'lib/characterize/feature_controls.rb', line 71

def without(method_name, &block)
  value = self.public_send(method_name)
  if !with_conditions(method_name, value)
    yield
  end
end