Start working on verbs

src/verb.rb

@@ -0,0 +1,96 @@
+GUYS = {
+  "む" => { "a" => "ま", "i" => "み", "u" => "む", "e" => "め", "o" => "も" },
+}
+
+class KanaKanji
+  attr_reader :kana, :kanji
+  def initialize(kana, kanji=nil)
+    @kana = kana
+    @kanji = kanji || kana
+  end
+
+  def [] (index)
+    self.class.new kana[index], kanji[index]
+  end
+
+  def + (other)
+    self.class.new kana + other, kanji + other
+  end
+
+  def last_character
+    GUYS[kana[-1]]
+  end
+
+  def all_but_last_character
+    self.class.new kana[0...-1], kanji[0...-1]
+  end
+end
+
+class Verb
+  attr_reader :dict_kanji, :dict_kana, :definition_english, :dict
+
+  def initialize(dict_kanji, dict_kana, definition_english)
+    @dict_kanji = dict_kanji || dict_kana
+    @dict_kana = dict_kana
+    @dict = KanaKanji.new dict_kana, dict_kanji
+    @definition_english = definition_english
+  end
+
+  def last_character
+    dict.last_character
+  end
+
+  def all_but_last_character
+    dict.all_but_last_character
+  end
+
+  def ve
+    VerbExpression
+  end
+
+  def dictionary
+    dict
+  end
+end
+
+class IchidanVerb < Verb
+  def long_form_present_positive
+    all_but_last_character + "ます"
+  end
+end
+
+class GodanVerb < Verb
+  def long_form_present_positive
+    all_but_last_character + last_character["i"] + "ます"
+  end
+end
+
+class SuruVerb < Verb
+  def long_form_present_positive
+    dict[..-3] + "します"
+  end
+end
+
+見る = IchidanVerb.new("見る", "みる", "to look")
+p 見る.dictionary.kanji
+p 見る.dictionary.kana
+p 見る.long_form_present_positive.kanji
+p 見る.long_form_present_positive.kana
+
+飲む = GodanVerb.new("飲む", "のむ", "to drink")
+p 飲む.dictionary.kanji
+p 飲む.dictionary.kana
+p 飲む.long_form_present_positive.kanji
+p 飲む.long_form_present_positive.kana
+
+する = SuruVerb.new("する", "する", "to do")
+p する.dictionary.kanji
+p する.dictionary.kana
+p する.long_form_present_positive.kanji
+p する.long_form_present_positive.kana
+
+勉強する = SuruVerb.new("勉強する", "べんきょうする", "to study")
+p 勉強する.dictionary.kanji
+p 勉強する.dictionary.kana
+p 勉強する.long_form_present_positive.kanji
+p 勉強する.long_form_present_positive.kana