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module ThinkingSphinx
class FacetCollection < Hash
attr_accessor :arguments
def initialize(arguments)
@arguments = arguments.clone
@attribute_values = {}
@facets = []
end
def add_from_results(facet, results)
facet = facet_from_object(results.first, facet) if facet.is_a?(String)
self[facet.name] ||= {}
@attribute_values[facet.name] ||= {}
@facets << facet
results.each_with_groupby_and_count { |result, group, count|
facet_value = facet.value(result, group)
self[facet.name][facet_value] ||= 0
self[facet.name][facet_value] += count
@attribute_values[facet.name][facet_value] = group
}
end
def for(hash = {})
arguments = @arguments.clone
options = arguments.extract_options!
options[:with] ||= {}
hash.each do |key, value|
attrib = facet_for_key(key).attribute_name
options[:with][attrib] = underlying_value key, value
end
arguments << options
ThinkingSphinx::Search.search *arguments
end
private
def underlying_value(key, value)
case value
when Array
value.collect { |item| underlying_value(key, item) }
else
@attribute_values[key][value]
end
end
def facet_for_key(key)
@facets.detect { |facet| facet.name == key }
end
def facet_from_object(object, name)
object.sphinx_facets.detect { |facet| facet.attribute_name == name }
end
end
end
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