Initial commit

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/knapsack_solver/cli.rb b/lib/knapsack_solver/cli.rb
new file mode 100644
index 0000000..716fb08
--- /dev/null
+++ b/lib/knapsack_solver/cli.rb
@@ -0,0 +1,49 @@
+require 'knapsack_solver/solver'
+require 'knapsack_solver/version'
+require 'knapsack_solver/cli_option_parser'
+require 'knapsack_solver/output_printer'
+require 'knapsack_solver/graph_printer'
+
+module KnapsackSolver
+  # This class implements a command-line interface for the 0/1 knapsack
+  # problem solver.
+  class CLI
+    # Suffix of a text file which will containg results of dataset solving
+    # (price, knapsack things presence, cpu time, wall clock time,
+    # relative_error).
+    RESULTS_FILNEMAE_SUFFIX = '.results'.freeze
+
+    # Suffix of a text file which will containg statistic data (average price,
+    # execution times, relative error)
+    STATS_FILNEMAE_SUFFIX = '.stats'.freeze
+
+    # Processes command-line arguments. If no option is given, converts arabic
+    # number to roman number and prints it to stdout.
+    #
+    # @param args [Array] the command-line arguments
+    def self.run(args)
+      options = CliOptionParser.parse(args)
+      return if options.nil?
+      datasets = args.each_with_object([]) do |file, sets|
+        sets << Dataset.parse(File.new(file))
+      end
+      s = Solver.new(options, datasets)
+      results = s.run
+      print_results(results, s.stats(results), options, args)
+    end
+
+    # Prints output of datasets solving. Results and statistics are printed to
+    # stdout or to a text files. Graphs of statistic values can be created.
+    #
+    # @param results [Hash] results of dataset solvings
+    # @param stats [Hash] statistics from the results of dataset solvings
+    # @param options [Hash] Command-line line options supplied to the CLI
+    # @param args [Array] array of the positional command-line arguments
+    def self.print_results(results, stats, options, args)
+      OutputPrinter.new(args, RESULTS_FILNEMAE_SUFFIX, results).print(options[:output_dir])
+      OutputPrinter.new(args, STATS_FILNEMAE_SUFFIX, stats).print(options[:output_dir])
+      return unless options[:graphs_dir]
+      GraphPrinter.new(args, stats, options[:graphs_dir]).print
+    end
+  end
+end