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module Plucky
module Normalizers
class SortValue
# Public: Initializes a Plucky::Normalizers::SortValue
#
# args - The hash of arguments
# :key_normalizer - What to use to normalize keys, must
# respond to call.
#
def initialize(args = {})
@key_normalizer = args.fetch(:key_normalizer) {
raise ArgumentError, "Missing required key :key_normalizer"
}
end
# Public: Given a value returns it normalized for Mongo's sort option
def call(value)
case value
when Array
if value.size == 1 && value[0].is_a?(String)
normalized_sort_piece(value[0])
else
value.compact.map { |v| normalized_sort_piece(v).flatten }
end
else
normalized_sort_piece(value)
end
end
# Private
def normalized_sort_piece(value)
case value
when SymbolOperator
[normalized_direction(value.field, value.operator)]
when String
value.split(',').map do |piece|
normalized_direction(*piece.split(' '))
end
when Symbol
[normalized_direction(value)]
else
value
end
end
# Private
def normalized_direction(field, direction=nil)
direction ||= 'ASC'
direction = direction.upcase == 'ASC' ? 1 : -1
[@key_normalizer.call(field).to_s, direction]
end
end
end
end
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