Bot which is somewhat capable of generating sentences

DictionaryGenerator.rb

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+class DictionaryGenerator
+  attr_reader :dictionary, :depth
+
+  def initialize( depth )
+    @dictionary = {}
+    @capitalized_words = []
+    @depth = depth
+    @split_words = /(\.\s+)|(\.$)|([?!])|[\s]+/
+    @split_sentence = /(?<=[.!?])\s+/
+  end
+
+  def add_word_to_dict( keyword, followedby )
+    @dictionary[keyword] ||= []
+    @dictionary[keyword] << followedby
+  end
+
+  def insert_text( text )
+    input_sentences = text.split @split_sentence
+
+    if input_sentences.empty? then raise "insert_text called without input" end
+    
+    unless input_sentences[-1].strip[-1].match /[.!?]/ then
+      input_sentences[-1] = input_sentences[-1].strip + '.'
+    end
+    
+    input_sentences.each do |sentence|
+      sentence.split(@split_words).each_cons(@depth + 1) do |words|
+        self.add_word_to_dict words[0..-2], words[-1]
+      end
+    end
+  end
+  
+end
+

SentenceGenerator.rb

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+class NullObject
+  def method_missing (*args, &block)
+    self
+  end
+  def nil?; true; end
+  def to_str; end
+  def to_ary; []; end
+end
+
+NULL_OBJECT = NullObject.new
+
+class SentenceGenerator
+
+  def initialize(dictionary)
+    @dictionary = dictionary
+    @depth = @dictionary.depth
+  end
+
+  def random_word(last_word)
+    @dictionary.dictionary.fetch(last_word, NULL_OBJECT).sample
+  end
+
+  def is_terminator?(symbol)
+    (symbol =~ /[!?]/ || symbol == '.')
+  end
+
+
+  # Ugly way of making sure the key starts with a capital letter
+  def random_capitalized_word
+    random_choice = ["temp"]
+    until random_choice[0] =~ /[A-Z]/
+      words = @dictionary.dictionary.keys
+      random_choice = words[rand(words.length)]
+    end
+    random_choice
+  end
+
+  def generate_sentence()
+    sentence = []
+    maximum_length = 20
+    wordcount = 0
+    sentence.concat(random_capitalized_word)
+    until (is_terminator?(sentence.last[-1])) || wordcount > maximum_length
+      wordcount += 1
+      word = random_word(sentence.last(@depth))
+      sentence << word
+    end
+    sentence.join(' ')
+  end
+end

love_story.txt

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+We were both young when I first saw you
+I close my eyes and the flashback starts
+I'm standing there on a balcony in summer air
+See the lights, see the party, the ball gowns
+See you make your way through the crowd
+And say hello
+Little did I know
+That you were Romeo, you were throwing pebbles
+And my daddy said, "Stay away from Juliet"
+And I was crying on the staircase
+Begging you, please, don't go
+And I said,
+"Romeo, take me somewhere we can be alone
+I'll be waiting, all that's left to do is run
+You'll be the prince and I'll be the princess
+It's a love story, baby just say yes
+So I sneak out to the garden to see you
+We keep quiet 'cause we're dead if they knew
+So close your eyes, escape this town for a little while
+'Cause you were Romeo, I was a scarlet letter
+And my daddy said "Stay away from Juliet"
+But you were everything to me, I was begging you, please, don't go
+And I said Romeo take me somewhere we can be alone
+I'll be waiting, all there's left to do is run
+You'll be the prince and I'll be the princess
+It's a love story baby just say yes
+Romeo save me, they're trying to tell me how to feel
+This love is difficult, but it's real
+Don't be afraid, we'll make it out of this mess
+It's a love story, baby just say "Yes"
+Oh, oh
+I got tired of waiting
+Wondering if you were ever coming around
+My faith in you was fading
+When I met you on the outskirts of town
+And I said
+"Romeo save me, I've been feeling so alone
+I keep waiting for you but you never come
+Is this in my head? I don't know what to think"
+He knelt to the ground and pulled out a ring and said
+"Marry me, Juliet, you'll never have to be alone
+I love you and that's all I really know
+I talked to your dad, go pick out a white dress
+It's a love story, baby just say yes"
+Oh, oh,
+Oh, oh
+'Cause we were both young when I first saw you.

our_song.txt

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+I was riding shotgun with my hair undone in the front seat of his car,
+He's got a one-hand feel on the steering wheel,
+The other on my heart,
+I look around, turn the radio down, he says, "baby is something wrong?"
+I say "nothing, I was just thinking how we don't have a song, " 
+And he says,
+Our song is a slamming screen door, 
+Sneaking out late tapping on your window,
+When we're on the phone and you talk real slow,
+'Cause it's late and your mama don't know,
+Our song is the way you laugh,
+The first date man I didn't kiss her when I should have,
+And when I got home, before I said amen,
+Asking God if He could play it again.
+I was walking up the front porch steps after everything that day,
+Had gone all wrong, had been trampled on and lost and thrown away,
+Got to the hallway well on my way to my lovin' bed,
+I almost didn't notice all the roses,
+And the note that said,
+Our song is a slamming screen door, 
+Sneaking out late tapping on your window,
+When we're on the phone and you talk real slow,
+'Cause it's late and your mama don't know,
+Our song is the way you laugh,
+The first date man I didn't kiss her when I should have,
+And when I got home, before I said amen,
+Asking God if He could play it again.
+I've heard every album, listened to the radio,
+Waiting for something to come along,
+That was as good as our song,
+'Cause our song is a slamming screen door,
+Sneaking out late tapping on your window,
+When we're on the phone, and he talks real slow,
+'Cause it's late and his mama don't know,
+Our song is the way he laughs,
+The first date man I didn't kiss him when I should have,
+And when I got home, before I said amen,
+Asking God if He could play it again.
+I was riding shotgun with my hair undone in the front seat of his car,
+I grabbed a pen and an old napkin 
+And I wrote down our song.

shouldve_said_no.txt

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+It's strange to think the songs we used to sing
+The smiles, the flowers, everything: is gone
+Yesterday I found out about you
+Even now just looking at you: feels wrong
+You say that you'd take it all back, given one chance
+It was a moment of weakness and you said yes
+You should've said no, you should've gone home
+You should've thought twice before you let it all go
+You should've know that word, bout what you did with her
+Would get back to me
+And I should've been there, in the back of your mind
+I shouldn't be asking myself why
+You shouldn't be begging for forgiveness at my feet
+You should've said no, baby and you might still have me
+You can see that I've been crying
+And baby you know all the right things: to say
+But do you honestly expect me to believe
+We could ever be the same
+You say that the past is the past, you need one chance
+It was a moment of weakness and you said yes
+You should've said no, you should've gone home
+You should've thought twice before you let it all go
+You should've know that word, bout what you did with her
+Would get back to me
+And I should've been there, in the back of your mind
+I shouldn't be asking myself why
+You shouldn't be begging for forgiveness at my feet
+You should've said no, baby and you might still have me
+I can't resist, before you go, tell me this
+Was it worth it
+Was she worth this
+No, no no no
+You should've said no, you should've gone home
+You should've thought twice before you let it all go
+You should've know that word, bout what you did with her
+Would get back to me
+And I should've been there, in the back of your mind
+I shouldn't be asking myself why
+You shouldn't be begging for forgiveness at my feet
+You should've said no, baby and you might still have me

taylor_bot.rb

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+require_relative 'DictionaryGenerator'
+require_relative 'SentenceGenerator'
+
+
+love_file = File.open("love_story.txt","r").read
+our_file = File.open("our_song.txt","r").read
+shouldve_file = File.open('shouldve_said_no.txt','r').read
+
+text = love_file + our_file + shouldve_file
+
+@dictionary = DictionaryGenerator.new(2)
+@dictionary.insert_text text
+
+@sentenceGen = SentenceGenerator.new(@dictionary)
+puts "-------------------------------------"
+puts @sentenceGen.generate_sentence()
+puts "-------------------------------------"