Nutrition calculator

Create Foods with base nutrition values, change one of the base values and recalculate other values automatically.

Installation

npm i @necrometal/nutrition

Examples

import {Food, Nutritions, Units} from '@necrometal/nutrition'

const baseValues = {
  amount: 100,
  fat: 30,
  carbohydrate: 40,
  protein: 65,
  calorie: 124,
}
const food = new Food('rice', Units.GRAM, baseValues);

// returns 'rice'
food.getName();

// returns 'g'
food.getUnit();

/**
 * changes food amount value and * store the result in the
 * currentValues.amount
 * there are also changeCalories, * changeFat, changeCarbohydrate,
 * changeCalories functions
 */
food.changeAmount(23);

// get current nutrition values of rice
const {
  calorie,
  amount,
  fat, 
  carbohydrate,
  protein
} = food.getCurrentValues()

// get base nutrition values of rice
const {
  calorie,
  amount,
  fat, 
  carbohydrate,
  protein
} = food.getBaseValues()

Error handling

import {Food, Nutritions, Units, InvalidFoodAmountError} from '@necrometal/nutrition'

const baseValues = {
  amount: 100,
  fat: 30,
  carbohydrate: 40,
  protein: 65,
  calorie: 124,
}

try{
  const rice = new Food('rice', Units.GRAM, baseValues)
}catch(error){
  // error: InvalidFoodAmountError
}

ALl error types:

• InvalidFoodAmountError -> if the amount of the baseValues is less or equal zero or the changeAmount parameter is less than zero

• EmptyFoodAmountError -> if the Food first parameter is empty