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class Problem < ActiveRecord::Base
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belongs_to :description
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validates_presence_of :name
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validates_format_of :name, :with => /^\w+$/
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validates_presence_of :full_name
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def self.find_available_problems
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find(:all, :conditions => {:available => true}, :order => "date_added DESC")
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end
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def self.new_from_import_form_params(params)
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problem = Problem.new
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# form error checking
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time_limit_s = params[:time_limit]
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memory_limit_s = params[:memory_limit]
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time_limit_s = '1' if time_limit_s==''
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memory_limit_s = '32' if memory_limit_s==''
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time_limit = time_limit_s.to_i
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memory_limit = memory_limit_s.to_i
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if time_limit==0 and time_limit_s!='0'
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problem.errors.add_to_base('Time limit format errors.')
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elsif time_limit<=0 or time_limit >60
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problem.errors.add_to_base('Time limit out of range.')
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end
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if memory_limit==0 and memory_limit_s!='0'
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problem.errors.add_to_base('Memory limit format errors.')
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elsif memory_limit<=0 or memory_limit >512
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problem.errors.add_to_base('Memory limit out of range.')
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end
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if params[:file]==nil or params[:file]==''
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problem.errors.add_to_base('No testdata file.')
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end
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file = params[:file]
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if problem.errors.length!=0
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return problem
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end
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problem.name = params[:name]
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if params[:full_name]!=''
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problem.full_name = params[:full_name]
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else
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problem.full_name = params[:name]
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end
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if not problem.valid?
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return problem
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end
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importer = TestdataImporter.new
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if not importer.import_from_file(problem.name,
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file,
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time_limit,
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memory_limit)
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problem.errors.add_to_base('Import error.')
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end
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problem.full_score = 100
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problem.date_added = Time.new
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problem.test_allowed = true
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problem.output_only = false
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problem.available = false
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return problem, importer.log_msg
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end
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end
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jittat-