Initial commit

drawT00L.rb

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+#!usr/bin/env ruby
+
+#############################
+# DRAWT00l -----------------#
+# An ASCII drawing tool that#
+# supports bucket fill.-----#
+#############################
+
+@paper= Array.new
+@instructions = Hash.new
+
+def canvas(width, height)
+  0.upto(height+1) do |line|
+  #adding two extra lines to account for the top/bottom border
+    if line == 0
+      #top horizontal border
+      @paper[line]='-'*(width+2)
+    elsif line == (height+1)
+      #bottom horizontal border
+      @paper[line]='-'*(width+2)
+    else
+      #draw inside the canvas/box
+      inside = " " * (width)
+      @paper[line]="|"+"#{inside}"+"|"
+    end
+  end
+end
+
+def create_line(coords)
+  coord_array = coords.split
+  if coord_array[1] == coord_array[3]
+    #we are doing a horizontal line
+    (coord_array[0]..coord_array[2]).each do |x|
+        @paper[(coord_array[1].to_i)][x.to_i] = "x"
+    end
+  elsif coord_array[0] == coord_array[2]
+    #we are doing a vertical line
+    (coord_array[1]..coord_array[3]).each do |y|
+      @paper[(y.to_i)][coord_array[0].to_i] = "x"
+    end
+ else
+    #catch error
+    raise 'error: Mismatching x and y coordinates'
+  end
+end
+
+def create_rectangle(coords)
+  coord_array = coords.split
+  #lets make use of the create_line method using the provided coords we can draw each line of the rectangle.
+  top_side = coord_array[0] + " " + coord_array[1] + " " + coord_array[2] + " " + coord_array[1]
+  bottom_side = coord_array[0] + " " + coord_array[3] + " " + coord_array[2] + " " + coord_array[3]
+  left_side = coord_array[0] + " " + coord_array[1] + " " + coord_array[0] + " " + coord_array[3]
+  right_side = coord_array[2] + " " + coord_array[1] + " " + coord_array[2] + " " + coord_array[3]
+  #we have all of the sides, now lets draw them using the create_line method
+  %w(top_side bottom_side left_side right_side).each do |side|
+    create_line(eval(side))
+  end
+end
+
+def bucket_fill(options)
+  x, y, c = options.split
+  #set vars to int to makes things easier
+  x, y = x.to_i, y.to_i
+  #start_c holds the original "color", we will use this to compare againts
+  start_c = @paper[y][x]
+  #we need to do some math, so lets gather the width and height of the "paper"
+  width = @paper[y].length
+  height = @paper.length
+  #create an empty array to store the areas we want to fill/color
+  area_fill = []
+  #to get started lets see if our x,y coords match start_c with our "color", if it does not add it to the area_fill array
+  area_fill << [x, y] unless start_c == c
+
+  #while loop will continue until fill array is empty
+  while area_fill.any?
+    #pop aka remove coords from area_fill to prevent from doing duplicate work
+    x, y = area_fill.pop
+    #if coords match the starting color lets fill that area
+    next unless !@paper[y].nil? && @paper[y][x] == start_c
+    @paper[y][x]  = c
+    #now lets add the area around the coords to area_fill
+    #using bitwise operator to append uniq coords to array
+    #perfoming modular operation for ease of collection north,south,east,west coords
+    area_fill |= [[(x-1) % width, y],[(x+1) % width, y],[x,(y-1) % height],[x,(y+1) % height]]
+  end
+end
+
+def read_input(file_path)
+  if File.exist? file_path
+    #count to keep keys uniq / unless "C" we should only have one
+    line = 1
+      File.foreach(file_path).each do |x|
+         unless x[0] == "C"
+           @instructions[x[0]+line.to_s] =x[1..-1].strip
+           line += 1
+           else
+           @instructions[x[0]] =x[1..-1].strip
+         end
+      end
+  else
+    raise 'error: Input file not found/missing!'
+  end
+  #Make sure we have intructions to create a canvas before starting
+  unless @instructions.flatten.include? 'C'
+    raise 'error: Missing canvas "C" instructions.We need to know the Height and Width of area we are working with'
+  end
+end
+
+def write_output(output_file)
+    begin
+      file = File.open(output_file,'a')
+      file.puts(@paper)
+    rescue
+      raise "error: IO FAIL"
+    ensure
+      file.close()
+    end
+end
+
+#read arguments provided by user using read_input method also check that we have both input/output files
+unless ARGV.empty? && ARGV.count != 2
+  read_input(ARGV[0])
+else
+  raise 'warning: Missing input and output files'
+end
+
+#DRAWWWWW
+begin
+  @instructions.each_key do |c|
+    if c == "C"
+      canvas(@instructions[c].split[0].to_i, @instructions[c].split[1].to_i)
+      write_output(ARGV[1])
+    elsif c =~/L/i
+      create_line(@instructions[c])
+      write_output(ARGV[1])
+    elsif c =~/R/i
+      create_rectangle(@instructions[c])
+      write_output(ARGV[1])
+    elsif c =~/B/i
+      bucket_fill(@instructions[c])
+      write_output(ARGV[1])
+    end
+  end
+  rescue
+    raise "error: Are your coordinates in rage of #{@paper[0].length.pred.pred}  by #{@paper.length.pred.pred}"
+end

input_sample.txt

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+C 25 10
+R 16 1 20 3
+B 10 3 o

output.txt

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+---------------------------
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+---------------------------
+---------------------------
+|               xxxxx     |
+|               x   x     |
+|               xxxxx     |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+|                         |
+---------------------------
+---------------------------
+|oooooooooooooooxxxxxooooo|
+|ooooooooooooooox   xooooo|
+|oooooooooooooooxxxxxooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+|ooooooooooooooooooooooooo|
+---------------------------