Class: LENSE

Inherits:
Object
  • Object
show all
Defined in:
lib/lense.rb

Constant Summary collapse

VERSION = 
'0.1.22'
LENSE_DIR = 
File.join(ENV['HOME'],'.lense')
COURSES_DIR = 
File.join(LENSE_DIR,'courses')
CURRENT_COURSE_FILE = 
File.join(LENSE_DIR,'current_course')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LENSE 



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# File 'lib/lense.rb', line 12

def initialize()
  Dir.mkdir(LENSE_DIR) unless File.directory?(LENSE_DIR)
  Dir.mkdir(COURSES_DIR) unless File.directory?(COURSES_DIR)
  File.open(CURRENT_COURSE_FILE, 'w') {} unless File.file?(CURRENT_COURSE_FILE)

  config_file = File.join(LENSE_DIR,'config')
  config_str = File.file?(config_file) ? File.read(config_file) : ''

  @config = Psych.load(config_str) || {}

  @current_course = File.read(CURRENT_COURSE_FILE).strip()
  @current_course = '> NOT SET <' if @current_course.empty?
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/lense.rb', line 5

def config
  @config
end

#current_course ⇒ Object (readonly)

Returns the value of attribute current_course.



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# File 'lib/lense.rb', line 5

def current_course
  @current_course
end

Instance Method Details

#list_courses ⇒ Object 



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# File 'lib/lense.rb', line 40

def list_courses()
  puts "Installed courses ..."
  Dir.entries(COURSES_DIR).each do |c|
    prefix = c == @current_course ? " > " : "   "
    puts "#{prefix}#{c}" unless ['.','..'].include? c
  end
  puts "> Indicates current course"
end

#run ⇒ Object 



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# File 'lib/lense.rb', line 63

def run()
  q_prefix = '<%= color("Q? ",:red) %>'
  hint_prefix = '<%= color("Hint: ",:yellow) %>'
  say_prefix = '<%= color("% ",:blue) %>'
  answer_prefix = '<%= color("Ans: ",:red) %>'
  question_separator = '<%= color("---",:green) %>'

  test_file = 'data/mfwvl1.yaml'
  test_str = File.file?(test_file) ? File.read(test_file) : ''
  lense_file = Psych.load(test_str) || {}

  lense_file['lesson_plan'].each do |lesson|
    say question_separator
    say "#{say_prefix} #{lesson['say']}" if lesson['say']

    if lesson['question'] && lesson['question']['ask']
      asked, hint_limit, max_asked, correct  = 0, 3, 5, false

      until correct || asked >= max_asked do
        asked += 1
        question = lesson['question']['ask']
        hint = lesson['question'] && lesson['question']['hint']

        show_hint = ''

        if hint && asked > hint_limit
          show_hint = "\n#{hint_prefix} #{hint}"
        end

        response = ask "#{q_prefix} #{question}#{show_hint}"
        correct = response == lesson['question']['expect']
      end

      if correct
        say "<%= color('Correct!',:green) %>"
      else
        say "#{answer_prefix} #{lesson['question']['expect']}"
      end
    end
  end
end

#search(term) ⇒ Object 



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# File 'lib/lense.rb', line 49

def search(term)
  puts "Searching course repository ..."
  response = RestClient.get 'http://lightweightnetsec.com/lessons', { params: { format: 'json', text: term } }
  courses = JSON.parse(response)
  courses.each do |c|
    puts "---"
    puts "Title: #{c['title']}"
    puts "Description: #{c['description']}"
    print "Difficulty: "
    c['difficulty'].times { print '*' }
    puts ""
  end
end

#select_course(course) ⇒ Object 



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# File 'lib/lense.rb', line 26

def select_course(course)
  courses = Dir.entries(COURSES_DIR)
  course_available = courses.include? course

  if course_available && course != @current_course
    File.open(CURRENT_COURSE_FILE, 'w') { |f| f.write course }
    course
  elsif course == @current_course
    nil
  else
    raise "Cannot find course (#{course})"
  end
end