Use the terminal-table gem to output tables in the shell

lib/guillotine/shell/output_formatter.rb

@@ -2,13 +2,7 @@ module Guillotine
   module Shell
     class OutputFormatter
       dir = File.dirname(__FILE__) + "/output_formatter"
-      autoload :ColumnOutputer,         "#{dir}/column_outputer"
-      autoload :ColumnDelimiterHeader,  "#{dir}/column_delimiter_header"
-      autoload :ColumnExtractor,        "#{dir}/column_extractor"
-      autoload :ColumnLengthCalculator, "#{dir}/column_length_calculator"
       autoload :TableOutputer,          "#{dir}/table_outputer"
-      autoload :OutputBuffer,           "#{dir}/output_buffer"
-      autoload :RowAdder,               "#{dir}/row_adder"
 
       EMPTY_SET_STRING = "Empty set"
 

lib/guillotine/shell/output_formatter/table_outputer.rb

@@ -1,38 +1,29 @@
+require "terminal-table"
+
 module Guillotine
   module Shell
     class OutputFormatter
       class TableOutputer
+        include Terminal::Table::TableHelper
+
         def initialize(table)
           @table = table
-          @out_buffer = OutputBuffer.new
         end
 
         def column_names
           @column_names ||= @table.first.keys
         end
 
         def output
-          last_column_name = column_names.last
-          column_names.each do |column_name|
-            add_column(column_name)
-          end
-          @out_buffer.to_s
-        end
-
-        def last_column_name
-          @last_column_name ||= column_names.last
-        end
-
-        def last_column?(column_name)
-          last_column_name == column_name
-        end
-
-        def add_column(column_name)
-          RowAdder.new(column_name, extractor_for(column_name), @out_buffer).add(last_column?(column_name))
-        end
-
-        def extractor_for(column_name)
-          @extractor = ColumnExtractor.new.extract(column_name, @table)
+          table do |t|
+            t.headings = column_names
+
+            @table.each do |record|
+              t << column_names.map do |col|
+                record[col]
+              end
+            end
+          end.to_s
         end
       end
     end