Lab4/student.rb - Lab5 - Evorunner/ruby_labs

Lab4/student.rb
83 строки3 KB
Иван
lab-04: работа с файлами, GroupManager и StudentRepository
31 май 2026, 17:34
31 май 2026, 17:3464ef571
class Student
  VALID_GENDERS      = %w[male female].freeze
  VALID_SKILL_LEVELS = %w[beginner intermediate advanced expert].freeze
  EMAIL_REGEX        = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i

  attr_accessor :id, :name, :age, :gender, :group, :email, :skills

  def initialize(name:, age:, gender:, group:, email:, skills: {}, id: nil)
    @id     = id
    @name   = name
    @age    = age
    @gender = gender
    @group  = group
    @email  = email
    @skills = skills
  end

  # Валидации

  def valid_name?    = name.is_a?(String) && !name.strip.empty?
  def valid_age?     = age.is_a?(Integer) && age > 0
  def valid_gender?  = VALID_GENDERS.include?(gender.to_s)
  def valid_group?   = group.is_a?(String) && !group.strip.empty?
  def valid_email?   = email.is_a?(String) && email.match?(EMAIL_REGEX)
  def valid_skills?
    return false unless skills.is_a?(Hash)
    skills.all? { |k, v| !k.to_s.strip.empty? && VALID_SKILL_LEVELS.include?(v) }
  end

  def valid?
    valid_name? && valid_age? && valid_gender? &&
      valid_group? && valid_email? && valid_skills?
  end

  def errors
    errs = []
    errs << "Имя не может быть пустым"                         unless valid_name?
    errs << "Возраст должен быть положительным целым числом"   unless valid_age?
    errs << "Пол должен быть 'male' или 'female'"              unless valid_gender?
    errs << "Группа не может быть пустой"                      unless valid_group?
    errs << "Email некорректен"                                unless valid_email?
    errs << "Навыки содержат некорректные данные"              unless valid_skills?
    errs
  end

  # Сериализация в строку файла

  def to_csv
    skills_str = skills.map { |k, v| "#{k}:#{v}" }.join(";")
    "#{id},#{name},#{age},#{gender},#{group},#{email},#{skills_str}"
  end

  def self.from_csv(line)
    parts      = line.chomp.split(",", 7)
    id         = parts[0].to_i
    name       = parts[1]
    age        = parts[2].to_i
    gender     = parts[3]
    group      = parts[4]
    email      = parts[5]
    skills_raw = parts[6] || ""
    skills = skills_raw.split(";").each_with_object({}) do |pair, h|
      k, v = pair.split(":")
      h[k.to_sym] = v if k && v
    end
    new(id: id, name: name, age: age, gender: gender,
        group: group, email: email, skills: skills)
  end

  # Форматированный вывод

  def to_s
    gender_str = gender.to_s == "male" ? "мужской" : "женский"
    lines = ["[ID: #{id}] #{name}:"]
    lines << "   #{age} лет, #{gender_str}"
    lines << "   #{email}"
    if skills.any?
      lines << "   Навыки:"
      skills.each { |skill, level| lines << "     #{skill}: #{level}" }
    end
    lines.join("\n")
  end
end