Class: Acme::Smileage::Utils::Matcher

Inherits:
Object
  • Object
show all
Defined in:
lib/acme/smileage/utils/matcher.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str) ⇒ Matcher

Returns a new instance of Matcher.



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# File 'lib/acme/smileage/utils/matcher.rb', line 12

def initialize(str)
  @str = str
  @max_score = 5
end

Instance Attribute Details

#max_score ⇒ Object

Returns the value of attribute max_score.



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# File 'lib/acme/smileage/utils/matcher.rb', line 10

def max_score
  @max_score
end

Instance Method Details

#index_by_amatch(str, targets) ⇒ Object 



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# File 'lib/acme/smileage/utils/matcher.rb', line 50

def index_by_amatch(str, targets)
  matcher = Amatch::Sellers.new(str)
  if r = targets.map.with_index {|e,i| [i, matcher.match(e)] }.sort_by {|e| e[1] }[0]
    return r[0] if r[1] < self.max_score # score があまりにも大きかったら無視
  end
end

#match(targets) ⇒ Object 



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# File 'lib/acme/smileage/utils/matcher.rb', line 17

def match(targets)
  # 完全一致検索
  if r = targets.find {|e| e == @str }
    return r
  end

  # 正規化
  nstr = normalize(@str)
  ntargets = targets.map {|e| normalize(e) }

  # 大文字小文字を無視して完全一致検索
  if i = ntargets.index {|e| e == nstr }
    return targets[i]
  end

  # 大文字小文字を無視して前方一致検索 (最低でも 2 文字は必要)
  if nstr.length > 1 and i = ntargets.index {|e| e.start_with?(nstr) }
    return targets[i]
  end

  # 編集距離であいまい検索
  if i = index_by_amatch(@str, targets)
    return targets[i]
  end

  # 大文字小文字を無視して編集距離であいまい検索
  if i = index_by_amatch(nstr, ntargets)
    return targets[i]
  end

  nil
end

#normalize(str) ⇒ Object 



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# File 'lib/acme/smileage/utils/matcher.rb', line 57

def normalize(str)
  return nil unless str
  Moji.hira_to_kata(Moji.normalize_zen_han(str)).downcase.gsub(/\s+/, "")
end