Prova-Ruby-Rafael-Figueirêdo-de-Medeiros

uai.rb

require 'json'

class Util
  def self.load_json(nome)
    JSON.parse(File.read(nome))
  end
end

class UAI


  def initialize

    @subjects = Util.load_json('subjects.json')

  end



def list_teachers(course_name: nil)
result = []

    if (course_name)==nil
    @subjects.each{|subject|

      if (subject['instructor']['name']).include?("-")
        aux =[]
        aux = subject['instructor']['name'].split(" - ")

        result.push aux.first
      else
        result.push subject['instructor']['name']
      end
    }
    end
    if (course_name)!=nil

    @subjects.each{|subject|

      if (subject['course'])==(course_name)

          if (subject['instructor']['name']).include?("-")
            aux =[]
            aux = subject['instructor']['name'].split(" - ")

            result.push aux.first
          else
            result.push subject['instructor']['name']
          end
      end
    }
    end

    return result.uniq.sort
  

end


def list_courses_involved
result = []
  @subjects.each{|subject|

      result.push subject['course']

  }
  result.uniq.sort

end


end