Class: Meal

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

Instance Method Summary collapse

Constructor Details

#initialize(dining_hall, date, meal) ⇒ Meal

Scrapes for one dining hall, one day, one meal



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# File 'lib/classes/meal.rb', line 3

def initialize(dining_hall, date, meal)
  @date = date
  @meal = meal
  @dining_hall = dining_hall
  
  @day_items = self.get_day_items(@meal, @date)
end

Instance Method Details

#fetch_menu(meal) ⇒ Object 



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# File 'lib/classes/meal.rb', line 25

def fetch_menu(meal)
  # Get menu table from dining website, use dinner for dates
  agent = Mechanize.new
  meal_page = agent.get(@dining_hall.urls[meal])
  table = meal_page.search("div.boxbody")
  
  # Scrape all tds into array
  @tds = []
  table.xpath('//tr/td').to_a.each do |td|
    td = td.text.lstrip.rstrip
    @tds << td unless (td.gsub(/\s+/, "") == "" or td.gsub(/\s+/, "") == "\u00A0")
  end
  
  # Remove dining hall title, which is the first element in tds
  @tds.shift
end

#get_day_items(meal, date) ⇒ Object 



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# File 'lib/classes/meal.rb', line 42

def get_day_items(meal, date)
  # Split dining hall tds array by date delimiter
  # Each child array contains menu titles and items for one day
  tds = @dining_hall.instance_variable_get("@#{meal}_tds")
  days_items = tds.split do |td|
    begin
      DateTime.strptime(td, "%A, %B %d, %Y")
    rescue ArgumentError
      false
    else
      true
    end
  end
  
  begin
    Hash[*days_items[DAYS.index(date.strftime("%A").downcase) + 1].flatten]
  rescue NoMethodError => e
    raise NoDataError, "Menu data unavailable for this meal."
  end
end

#to_hash ⇒ Object 



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# File 'lib/classes/meal.rb', line 11

def to_hash()
  # Add date key to beginning of hash and
  # return hash of items and titles
  {'date' => @date.to_s}.merge @day_items
end

#to_s ⇒ Object 



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# File 'lib/classes/meal.rb', line 17

def to_s()
  str = "Menu for #{@meal} at #{@dining_hall.name.titlecase} on #{@date.strftime("%A, %B %d, %Y")}:\n"
  @day_items.each do |title, item|
    str += "#{title}: #{item}\n"
  end
  str.rstrip
end