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# encoding: utf-8 module Adhearsion class CallController module MenuDSL class RangeMatchCalculator < MatchCalculator def initialize(pattern, match_payload) raise unless pattern.first.kind_of?(Numeric) && pattern.last.kind_of?(Numeric) super end def match(query) numerical_query = coerce_to_numeric query if numerical_query exact_match = pattern.include?(numerical_query) ? query : nil potential_matches = numbers_in_range_like numerical_query potential_matches.reject! { |m| m.to_s == exact_match.to_s } if exact_match new_calculated_match :query => query, :exact_matches => exact_match, :potential_matches => potential_matches else CalculatedMatch.failed_match! pattern, query, match_payload end end private # Returns all numbers in the range (@pattern) that +begin with+ the number given # as the first arguement. # # NOTE: If you're having trouble reading what this method is actually doing. It's # effectively a much more efficient version of this: # # pattern.to_a.select { |x| x.to_s.starts_with? num.to_s }.flatten # # Huge thanks to Dave Troy (http://davetroy.blogspot.com) for this awesomely # efficient code! def numbers_in_range_like(num) return (pattern === 0 ? [0] : nil) if num == 0 raise ArgumentError unless num.kind_of?(Numeric) Array.new.tap do |matches| first, last = pattern.first, pattern.last power = 0 while num < last ones_count = 10**power - 1 range = ([num, first].max..[num + ones_count, last].min).to_a matches.concat range num *= 10 power += 1 end end end end # class RangeMatchCalculator end end end
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28 entries across 28 versions & 1 rubygems