joshnesbitt · July 16, 2015 13:24 · Jul 16, 2015
diff --git a/filter.rb b/filter.rb
@@ -0,0 +1,60 @@
+module BannedWordFilter
+  class Filter
+    class << self
+
+      BANNED_WORDS = %w(
+        fuck
+        shit
+        banned
+      )
+
+      BANNED_WORDS_REGEX = /(#{BANNED_WORDS.join('|')})/i
+
+      def run!(text)
+        filtered = text.dup.gsub(BANNED_WORDS_REGEX) do |match|
+          first_char = match[0]
+          middle_chars = match[1...-1]
+          last_char = match[-1]
+
+          "#{first_char}#{'*' * middle_chars.size}#{last_char}"
+        end
+
+        Result.new(text, filtered)
+      end
+
+    end
+  end
+
+  class Result
+
+    def initialize(original, clean)
+      @original, @clean = original, clean
+    end
+
+    def original_text
+      @original
+    end
+
+    def clean_text
+      @clean
+    end
+
+    def clean?
+      @original == @clean
+    end
+
+  end
+end
+
+def log_result(r)
+  puts
+  puts "Original: #{r.original_text}"
+  puts "Cleaned: #{r.clean_text}"
+  puts "Clean?: #{r.clean?}"
+  puts
+end
+
+log_result(BannedWordFilter::Filter.run!("This is a sentence."))
+log_result(BannedWordFilter::Filter.run!("This is a fucking sentence."))
+log_result(BannedWordFilter::Filter.run!("This is a fucking sentence here's a shit."))
+log_result(BannedWordFilter::Filter.run!("This is a fucking sentence here's a shit banned."))