Class: VariableQuestion

Inherits:
Question show all
Defined in:
lib/battleroom/models/variable_question.rb

Instance Attribute Summary collapse

Attributes inherited from Question

#answer_value, #data, #data_structure, #data_structure_class, #evaluation_scope, #explanation, #type, #variable_name, #variable_value

Instance Method Summary collapse

Methods inherited from Question

#enter_evaluation_loop, generate_question

Constructor Details

#initialize(eval_scope) ⇒ VariableQuestion

Returns a new instance of VariableQuestion.



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# File 'lib/battleroom/models/variable_question.rb', line 10

def initialize(eval_scope)
  super(eval_scope)
  @variable_value = rotate_array(data[:possible_variable_values]).first
  @formatted_value = format_value_for_stdout_and_eval(variable_value)
end

Instance Attribute Details

#formatted_value ⇒ Object

Returns the value of attribute formatted_value.



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# File 'lib/battleroom/models/variable_question.rb', line 5

def formatted_value
  @formatted_value
end

Instance Method Details

#evaluate_variable_assignment_input ⇒ Object 



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# File 'lib/battleroom/models/variable_question.rb', line 41

def evaluate_variable_assignment_input
  enter_evaluation_loop do |user_input|
    begin
      evaluation_scope.eval(user_input)
      if evaluation_scope.eval("#{variable_name} == #{formatted_value}")
        # this last returned value of 'true' is vital;
        # the return value of yield is used in a conditional
        true
      else
        puts "You mis-assigned #{variable_name}. Try again!".red
      end
    rescue NameError => e
      reveal_name_error_follies_to_user(user_input)
    rescue Exception => e
      if e.message.match(/unterminated string/)
        puts 'Blurg! You neglected to provide closing quotes for your string. Try again!'.red
      else
        puts e.message
      end
    end
  end
end

#print_variable_assignment_prompt ⇒ Object 



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# File 'lib/battleroom/models/variable_question.rb', line 16

def print_variable_assignment_prompt
  formatted_class = format_class_for_output(variable_value.class)
  substrings = [
    'Create a variable '.blue,
    variable_name.yellow,
    ' and assign it the '.blue,
    formatted_class.blue,
    ' value '.blue,
    formatted_value.yellow
  ]
  puts substrings.join
end

#reveal_name_error_follies_to_user(user_input) ⇒ Object 



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# File 'lib/battleroom/models/variable_question.rb', line 29

def reveal_name_error_follies_to_user(user_input)
  if user_input.include?(variable_name) && !user_input.match(/[^=]=[^=]/i)
    puts 'You\'re not using the assignment operator!'.red
  elsif !user_input.match(/("|')/) && variable_value.class == String
    puts 'Rats! You\'ve just made a common rookie mistake! ' +
         'Strings are always surrounded by quotes. Otherwise, Ruby will ' +
         'think you\'re referencing a variable or method name. Try again.'.red
  else
    puts 'Looks like you mistyped the variable name. Check for misspellings and try again.'.red
  end
end