dinnerModel.js

//DinnerModel class
class DinnerModel {
  constructor() {
    this.dishes = dishesConst;
	this.dinner = {guests:0, menu:[]};
    //TODO Lab 0
    // implement the data structure that will hold number of guests
    // and selected dishes for the dinner menu
	
  }

  setNumberOfGuests(num) {
    //TODO Lab 0
	if(num >= 0){
		this.dinner.guests = num;
	}
  }

  getNumberOfGuests() {
    //TODO Lab 0
	return this.dinner.guests;
  }

  //Returns the dish that is on the menu for selected type 
  getSelectedDish(type) {
    //TODO Lab 0
		for(let dish of this.dinner.menu){
			if (dish.type === type){
				return dish;
			}
		}
	return undefined;
  }

  //Returns all the dishes on the menu.
  getFullMenu() {
	return this.dinner.menu;  
  }
  //Returns all ingredients for all the dishes on the menu.
  getAllIngredients() {
    //TODO Lab 0
	let y = [];
	for(let x of this.dinner.menu){
		for(let z of x.ingredients){
			y.push(z);
		}
	}
	return y;
	}
	//Returns the total price of the menu (all the ingredients multiplied by number of guests).
	getTotalMenuPrice() {
		let z = 0;
		x = this.getAllIngredients;
		for( y of x.price){
			z = y*this.dinner.guests;
		}
		return z;
	}

	//Adds the passed dish to the menu. If the dish of that type already exists on the menu
	//it is removed from the menu and the new one added.
	addDishToMenu(id) {
	//TODO Lab 0 
	if(!(this.getSelectedDish(this.getDish(id).type) === undefined)){
		this.removeDishFromMenu(this.getSelectedDish(this.getDish(id)));
	}
	this.dinner.menu.push(this.getDish(id));
	}

	//Removes dish from menu
	removeDishFromMenu(id) {
	//TODO Lab 0
		this.dinner.menu.splice(this.dinner.menu.indexOf(id));
	}


	//Returns all dishes of specific type (i.e. "starter", "main dish" or "dessert").
	//query argument, text, if passed only returns dishes that contain the query in name or one of the ingredients.
	//if you don't pass any query, all the dishes will be returned
	getAllDishes(type, query) {
		if(query === undefined && type === undefined){
			return this.dishes;
		}
		return this.dishes.filter(function (dish) {
			let found = true;
			if (query) {
				found = false;
				dish.ingredients.forEach(function (ingredient) {
					if (ingredient.name.indexOf(query) !== -1) {
						found = true;
					}
				});
				if (dish.name.indexOf(query) !== -1) {
					found = true;
				}
			}
			return (dish.type === type || type == "") && found;
		});
	}

  //Returns a dish of specific ID
getDish(id) {
	for (let dsh of this.dishes) {
		if (dsh.id === id) {
			return dsh;
		}
    }
    return undefined;
  }
}
// the dishes constant contains an array of all the 
// dishes in the database. Each dish has id, name, type,
// image (name of the image file), description and
// array of ingredients. Each ingredient has name, 
// quantity (a number), price (a number) and unit (string 
// defining the unit i.e.//// "g", "slices", "ml". Unit
// can sometimes be empty like in the example of eggs where
// you just say "5 eggs" and not "5 pieces of eggs" or anything else.
const dishesConst = [{
  'id': 1,
  'name': 'French toast',
  'type': 'starter',
  'image': 'toast.jpg',
  'description': "In a large mixing bowl, beat the eggs. Add the milk, brown sugar and nutmeg; stir well to combine. Soak bread slices in the egg mixture until saturated. Heat a lightly oiled griddle or frying pan over medium high heat. Brown slices on both sides, sprinkle with cinnamon and serve hot.",
  'ingredients': [{
    'name': 'eggs',
    'quantity': 0.5,
    'unit': '',
    'price': 10
  }, {
    'name': 'milk',
    'quantity': 30,
    'unit': 'ml',
    'price': 6
  }, {
    'name': 'brown sugar',
    'quantity': 7,
    'unit': 'g',
    'price': 1
  }, {
    'name': 'ground nutmeg',
    'quantity': 0.5,
    'unit': 'g',
    'price': 12
  }, {
    'name': 'white bread',
    'quantity': 2,
    'unit': 'slices',
    'price': 2
  }]
}, {
  'id': 2,
  'name': 'Sourdough Starter',
  'type': 'starter',
  'image': 'sourdough.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'active dry yeast',
    'quantity': 0.5,
    'unit': 'g',
    'price': 4
  }, {
    'name': 'warm water',
    'quantity': 30,
    'unit': 'ml',
    'price': 0
  }, {
    'name': 'all-purpose flour',
    'quantity': 15,
    'unit': 'g',
    'price': 2
  }]
}, {
  'id': 3,
  'name': 'Baked Brie with Peaches',
  'type': 'starter',
  'image': 'bakedbrie.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'round Brie cheese',
    'quantity': 10,
    'unit': 'g',
    'price': 8
  }, {
    'name': 'raspberry preserves',
    'quantity': 15,
    'unit': 'g',
    'price': 10
  }, {
    'name': 'peaches',
    'quantity': 1,
    'unit': '',
    'price': 4
  }]
}, {
  'id': 100,
  'name': 'Meat balls',
  'type': 'main dish',
  'image': 'meatballs.jpg',
  'description': "Preheat an oven to 400 degrees F (200 degrees C). Place the beef into a mixing bowl, and season with salt, onion, garlic salt, Italian seasoning, oregano, red pepper flakes, hot pepper sauce, and Worcestershire sauce; mix well. Add the milk, Parmesan cheese, and bread crumbs. Mix until evenly blended, then form into 1 1/2-inch meatballs, and place onto a baking sheet. Bake in the preheated oven until no longer pink in the center, 20 to 25 minutes.",
  'ingredients': [{
    'name': 'extra lean ground beef',
    'quantity': 115,
    'unit': 'g',
    'price': 20
  }, {
    'name': 'sea salt',
    'quantity': 0.7,
    'unit': 'g',
    'price': 3
  }, {
    'name': 'small onion, diced',
    'quantity': 0.25,
    'unit': '',
    'price': 2
  }, {
    'name': 'garlic salt',
    'quantity': 0.7,
    'unit': 'g',
    'price': 2
  }, {
    'name': 'Italian seasoning',
    'quantity': 0.6,
    'unit': 'g',
    'price': 3
  }, {
    'name': 'dried oregano',
    'quantity': 0.3,
    'unit': 'g',
    'price': 3
  }, {
    'name': 'crushed red pepper flakes',
    'quantity': 0.6,
    'unit': 'g',
    'price': 3
  }, {
    'name': 'Worcestershire sauce',
    'quantity': 6,
    'unit': 'ml',
    'price': 7
  }, {
    'name': 'milk',
    'quantity': 20,
    'unit': 'ml',
    'price': 4
  }, {
    'name': 'grated Parmesan cheese',
    'quantity': 5,
    'unit': 'g',
    'price': 8
  }, {
    'name': 'seasoned bread crumbs',
    'quantity': 15,
    'unit': 'g',
    'price': 4
  }]
}, {
  'id': 101,
  'name': 'MD 2',
  'type': 'main dish',
  'image': 'bakedbrie.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ingredient 1',
    'quantity': 1,
    'unit': 'pieces',
    'price': 8
  }, {
    'name': 'ingredient 2',
    'quantity': 15,
    'unit': 'g',
    'price': 7
  }, {
    'name': 'ingredient 3',
    'quantity': 10,
    'unit': 'ml',
    'price': 4
  }]
}, {
  'id': 102,
  'name': 'MD 3',
  'type': 'main dish',
  'image': 'meatballs.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ingredient 1',
    'quantity': 2,
    'unit': 'pieces',
    'price': 8
  }, {
    'name': 'ingredient 2',
    'quantity': 10,
    'unit': 'g',
    'price': 7
  }, {
    'name': 'ingredient 3',
    'quantity': 5,
    'unit': 'ml',
    'price': 4
  }]
}, {
  'id': 103,
  'name': 'MD 4',
  'type': 'main dish',
  'image': 'meatballs.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ingredient 1',
    'quantity': 1,
    'unit': 'pieces',
    'price': 4
  }, {
    'name': 'ingredient 2',
    'quantity': 12,
    'unit': 'g',
    'price': 7
  }, {
    'name': 'ingredient 3',
    'quantity': 6,
    'unit': 'ml',
    'price': 4
  }]
}, {
  'id': 200,
  'name': 'Chocolat Ice cream',
  'type': 'dessert',
  'image': 'icecream.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ice cream',
    'quantity': 100,
    'unit': 'ml',
    'price': 6
  }]
}, {
  'id': 201,
  'name': 'Vanilla Ice cream',
  'type': 'dessert',
  'image': 'icecream.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ice cream',
    'quantity': 100,
    'unit': 'ml',
    'price': 6
  }]
}, {
  'id': 202,
  'name': 'Strawberry',
  'type': 'dessert',
  'image': 'icecream.jpg',
  'description': "Here is how you make it... Lore ipsum...",
  'ingredients': [{
    'name': 'ice cream',
    'quantity': 100,
    'unit': 'ml',
    'price': 6
  }]
}
];

// Deepfreeze
// https://github.com/substack/deep-freeze/blob/master/index.js
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze
function deepFreeze(o) {
  Object.freeze(o);
  Object.getOwnPropertyNames(o).forEach(function (prop) {
    if (o.hasOwnProperty(prop)
      && o[prop] !== null
      && (typeof o[prop] === "object" || typeof o[prop] === "function")
      && !Object.isFrozen(o[prop])) {
      deepFreeze(o[prop]);
    }
  });
}
deepFreeze(dishesConst);