Ruby version for poetry

70_Poetry/ruby/poetry.rb

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+PAGE_WIDTH = 64
+
+class State
+    attr_accessor :u, :i, :j, :k, :phrase, :line
+
+    def initialize
+        self.u = 0
+        self.i = 0
+        self.j = 0
+        self.k = 0
+        self.phrase = 1
+        self.line = ""
+    end
+end
+
+
+def print_centered msg
+    spaces = " " * ((PAGE_WIDTH - msg.length).fdiv(2))
+    print(spaces + msg)
+end
+
+def process_phrase_1 state
+    line_1_options = [
+        "MIDNIGHT DREARY",
+        "FIERY EYES",
+        "BIRD OR FIEND",
+        "THING OF EVIL",
+        "PROPHET"
+    ]
+
+    state.line = state.line + line_1_options[state.i]
+    return state.line
+end
+
+def process_phrase_2 state
+    line_2_options = [
+        ["BEGUILING ME", 2],
+        ["THRILLED ME", nil],
+        ["STILL SITTING....", nil],
+        ["NEVER FLITTING", 2],
+        ["BURNED", nil]
+    ]
+    words, u_modifier = line_2_options[state.i]
+    state.line += words
+    if !u_modifier.nil?
+        state.u = u_modifier
+    end
+end
+
+def process_phrase_3 state
+    phrases = [
+        [false, "AND MY SOUL"],
+        [false, "DARKNESS THERE"],
+        [false, "SHALL BE LIFTED"],
+        [false, "QUOTH THE RAVEN"],
+        [true, "SIGN OF PARTING"]
+    ]
+
+    only_if_u, words = phrases[state.i]
+    if !only_if_u || state.u > 0
+        state.line = state.line + words
+    end
+end
+
+def process_phrase_4 state
+    phrases = [
+        "NOTHING MORE",
+        "YET AGAIN",
+        "SLOWLY CREEPING",
+        "...EVERMORE",
+        "NEVERMORE"
+    ]
+
+    state.line += phrases[state.i]
+end
+
+def maybe_comma state
+    if state.line.length > 0 && state.line[-1] == "."
+        return
+    end
+
+    if state.u != 0 && Random.rand <= 0.19
+        state.line += ", "
+        state.u = 2
+    end
+
+    if Random.rand <= 0.65
+        state.line += " "
+        state.u += 1
+    else
+        puts state.line
+        state.line = ""
+        state.u = 0
+    end
+end
+
+def pick_phrase state
+    state.i = Random.rand(0..4)
+    state.j += 1
+    state.k += 1
+
+    if state.u <= 0 && (state.j % 2) != 0
+        state.line += (" " * 5)
+    end
+    state.phrase = state.j + 1
+end
+
+def main
+    print_centered("POETRY")
+    state = State.new
+    phrase_processors = {
+        '1' => 'process_phrase_1',
+        '2' => 'process_phrase_2',
+        '3' => 'process_phrase_3',
+        '4' => 'process_phrase_4'
+    }
+
+    while true
+        if state.phrase >= 1 && state.phrase <= 4
+            method(phrase_processors[state.phrase.to_s]).call(state)
+            maybe_comma state
+        elsif state.phrase == 5
+            state.j = 0
+            puts state.line
+            state.line = ""
+            if state.k > 20
+                puts ""
+                state.u = 0
+                state.k = 0
+            else
+                state.phrase = 2
+                next
+            end
+        end
+        pick_phrase state
+    end
+end
+
+if __FILE__ == $0
+    main
+end