Meal Planner

README.md

Meal Planner

Script in Javascript to automate meal planning in order to hit daily calories and protein.

data.js

module.exports = [
  {
    _key: 'MEXICAN_BURGERS',
    _id: 'recipes/MEXICAN_BURGERS',
    _rev: '_XTqNHIW--_',
    name: 'MEXICAN BURGERS',
    Calories: 150,
    Fat: 5,
    Carbs: 1,
    Protein: 23,
    type: 'Meal',
    servings: 4,
  },
  {
    _key: 'CHOCOLATE_CHIP_FROZEN_YOGURT_ICE_CREAM',
    _id: 'recipes/CHOCOLATE_CHIP_FROZEN_YOGURT_ICE_CREAM',
    _rev: '_XTqNfbK--_',
    name: 'CHOCOLATE CHIP FROZEN YOGURT ICE CREAM',
    Calories: 519,
    Protein: 10,
    Carbs: 86,
    Fat: 17,
    type: 'Snack',
    servings: 1,
  },
  {
    _key: 'BROILED_OMELET',
    _id: 'recipes/BROILED_OMELET',
    _rev: '_XTqN2pe--_',
    name: 'BROILED OMELET',
    Calories: 668,
    Protein: 92,
    Carbs: 4,
    Fat: 31,
    type: 'Meal',
    servings: 1,
  },
  {
    _key: 'CRISPY_CHICKEN_BITES',
    _id: 'recipes/CRISPY_CHICKEN_BITES',
    _rev: '_XTqOIhK--_',
    name: 'CRISPY CHICKEN BITES',
    Calories: 510,
    Protein: 75,
    Carbs: 0,
    Fat: 4,
    type: 'Meal',
    servings: 1,
  },
  {
    _key: 'MONTREAL_STYLE_SIRLOIN_ROAST',
    _id: 'recipes/MONTREAL_STYLE_SIRLOIN_ROAST',
    _rev: '_XTqOVK2--_',
    name: 'MONTREAL STYLE SIRLOIN ROAST',
    Calories: 632,
    Protein: 103,
    Carbs: 0,
    Fat: 21,
    type: 'Meal',
    servings: 1,
  },
  {
    _key: 'EMILYS_RUSSET_POTATO_WEDGES',
    _id: 'recipes/EMILYS_RUSSET_POTATO_WEDGES',
    _rev: '_XTqOtN---_',
    name: 'EMILY’S RUSSET POTATO WEDGES',
    Calories: 170,
    Fat: 7,
    Carbs: 26,
    Protein: 3,
    type: 'Side',
    servings: 2,
  },
  {
    _key: 'CHEESE_QUESADILLAS',
    _id: 'recipes/CHEESE_QUESADILLAS',
    _rev: '_XTqPAP6--_',
    name: 'CHEESE QUESADILLAS',
    Calories: 448,
    Protein: 26,
    Carbs: 37,
    Fat: 22,
    type: 'Side',
    servings: 1,
  },
  {
    _key: 'SALMON_WITH_DILL',
    _id: 'recipes/SALMON_WITH_DILL',
    _rev: '_XTqPPWe--_',
    name: 'SALMON WITH DILL',
    Calories: 160,
    Fat: 8,
    Carbs: 0,
    Protein: 23,
    type: 'Meal',
    servings: 4,
  },
  {
    _key: 'CHICKEN_ENCHILADA_BAKE',
    _id: 'recipes/CHICKEN_ENCHILADA_BAKE',
    _rev: '_XTqPmXu--_',
    name: 'CHICKEN ENCHILADA BAKE',
    Calories: 310,
    Fat: 8,
    Carbs: 29,
    Protein: 34,
    type: 'Meal',
    servings: 8,
  },
  {
    _key: 'CRISPY_FLANK_STEAK',
    _id: 'recipes/CRISPY_FLANK_STEAK',
    _rev: '_XTqP7GK--_',
    name: 'CRISPY FLANK STEAK',
    Calories: 715,
    Protein: 96,
    Carbs: 0,
    Fat: 33,
    type: 'Meal',
    servings: 1,
  },
  {
    _key: 'PATSY_POTATOES',
    _id: 'recipes/PATSY_POTATOES',
    _rev: '_XTqQQIG--_',
    name: 'PATSY POTATOES',
    Calories: 590,
    Protein: 11,
    Carbs: 90,
    Fat: 23,
    type: 'Side',
    servings: 1,
  },
  {
    _key: 'GREGS_RUSSET_POTATO_WEDGES',
    _id: 'recipes/GREGS_RUSSET_POTATO_WEDGES',
    _rev: '_XTqQhru--_',
    name: 'GREG’S RUSSET POTATO WEDGES',
    Calories: 512,
    Protein: 11,
    Carbs: 90,
    Fat: 14,
    type: 'Side',
    servings: 1,
  },
];

meal-planner.js

const { List } = require('immutable');

const data = require('./data');

// find the combinations of recipes that amount total calories and protein requirements

const BODY_WEIGHT_LBS = 180;

const TOTAL_CALORIES = 3200;
const CALORIES_LOWER_BOUND = TOTAL_CALORIES - 50;
const CALORIES_UPPER_BOUND = TOTAL_CALORIES + 50;
const PROTEIN_UPPER_BOUND = 1 * BODY_WEIGHT_LBS;

function calculateDayMenu({
  menu = List([]),
  recipes = List([]),
  recipeIndex = 0,
  calories = 0,
  protein = 0,
}) {
  const shouldExit = recipeIndex >= recipes.size;
  if (shouldExit) {
    const shouldRestart = calories < CALORIES_LOWER_BOUND;
    if (shouldRestart) {
      return calculateDayMenu({
        recipes: List(data.sort(randomSort)),
      });
    }
    return { menu, calories, protein };
  }

  const recipe = recipes.get(recipeIndex) || {};
  const caloriesCounted = calories + recipe.Calories;
  const proteinCounted = protein + recipe.Protein;
  const remainingServings = recipe.servings - 1;

  const shouldSkipRecipe =
    caloriesCounted > CALORIES_UPPER_BOUND ||
    proteinCounted > PROTEIN_UPPER_BOUND ||
    recipe.servings === 0;

  if (shouldSkipRecipe) {
    return calculateDayMenu({
      menu,
      recipes,
      recipeIndex: recipeIndex + 1,
      calories,
      protein,
    });
  }

  const newMenuItem = `${recipe.Calories}cal | protein ${recipe.Protein}g | ${
    recipe.name
  } | ${recipe.type}`;

  const recipeUpdated = { ...recipe, servings: remainingServings };

  return calculateDayMenu({
    menu: menu.push(newMenuItem),
    recipes: recipes.update(recipeIndex, () => recipeUpdated),
    recipeIndex,
    calories: caloriesCounted,
    protein: proteinCounted,
  });
}

function randomSort() {
  if (Math.random() > 0.5) return 1;
  if (Math.random() > 0.5) return -1;
  return 0;
}

const dayMenu = calculateDayMenu({
  recipes: List(data.sort(randomSort)),
});

console.log(JSON.stringify(dayMenu, null, 4));