Class: Kartograph::Artist

Inherits:
Object
  • Object
show all
Defined in:
lib/kartograph/artist.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(map) ⇒ Artist

Returns a new instance of Artist.



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# File 'lib/kartograph/artist.rb', line 5

def initialize(map)
  @map = map
end

Instance Attribute Details

#map ⇒ Object (readonly)

Returns the value of attribute map.



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# File 'lib/kartograph/artist.rb', line 3

def map
  @map
end

Instance Method Details

#build_properties(object, scope) ⇒ Object 



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# File 'lib/kartograph/artist.rb', line 22

def build_properties(object, scope)
  scoped_properties = scope ? properties.filter_by_scope(scope) : properties
  scoped_properties.each_with_object({}) do |property, mapped|
    begin
      mapped[property.key] = property.value_for(object, scope)
    rescue NoMethodError => e
      raise ArgumentError, "#{object} does not respond to #{property.name}, so we can't map it"
    end
  end
end

#draw(object, scope = nil) ⇒ Object 



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# File 'lib/kartograph/artist.rb', line 13

def draw(object, scope = nil)
  if map.cache
    cache_key = map.cache_key.call(object, scope)
    map.cache.fetch(cache_key) { build_properties(object, scope) }
  else
    build_properties(object, scope)
  end
end

#properties ⇒ Object 



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# File 'lib/kartograph/artist.rb', line 9

def properties
  map.properties
end