fix food and add meal

Author: PierreBresson

package.json

@@ -1,6 +1,6 @@
 {
   "name": "carbon-footprint",
-  "version": "1.5.1",
+  "version": "1.5.2",
   "description": "Calculate your carbon footprint. Food, transport, purchases, fashion, electricity and digital activities like streaming.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",

src/index.ts

@@ -5,8 +5,11 @@ import { getInternetUsageCarbonImpact } from './internet';
 import { streaming, StreamingType } from './streaming';
 import { purchase, PurchaseType } from './purchase';
 import { fashion, FashionType } from './fashion';
+import { meal, MealType } from './meal';
 
 export {
+  meal,
+  MealType,
   food,
   FoodType,
   transport,

src/meal/__tests__/meal.test.ts

@@ -0,0 +1,14 @@
+import { keys, map } from 'ramda';
+import { meal, MealType } from '../';
+
+test('All meal keys should contain a valid number', () => {
+  const foodKeys = keys(meal);
+  map((item: number) => expect(typeof foodKeys[item]).toBe('number'));
+});
+
+test('Number of default exports equals number of enums', () => {
+  const enumsCount = Object.keys(MealType).length;
+  const defaultExportsCount = Object.keys(meal).length;
+
+  expect(defaultExportsCount).toEqual(enumsCount);
+});

src/meal/index.ts

@@ -0,0 +1,4 @@
+import meal from './meal';
+import { MealType } from './meal.enum';
+
+export { meal, MealType };

src/meal/meal.enum.ts

@@ -0,0 +1,8 @@
+export enum MealType {
+  highMeat = 'highMeat',
+  mediumMeat = 'mediumMeat',
+  lowMeat = 'lowMeat',
+  pescetarian = 'pescetarian',
+  vegetarian = 'vegetarian',
+  vegan = 'vegan',
+}

src/meal/meal.ts

@@ -0,0 +1,21 @@
+/* Unit: kgCO2eq per meal */
+
+/* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4372775/ */
+/* Mean greenhouse gas emissions per 2,000 kcal */
+/* https://globalnews.ca/news/3615212/this-is-what-your-breakfast-lunch-and-dinner-calories-actually-look-like/ */
+/* Human get around 600 calories per meal */
+const highMeat = (7.19 * 600) / 2000;
+const mediumMeat = (5.63 * 600) / 2000;
+const lowMeat = (4.67 * 600) / 2000;
+const pescetarian = (3.91 * 600) / 2000;
+const vegetarian = (3.81 * 600) / 2000;
+const vegan = (2.89 * 600) / 2000;
+
+export default {
+  highMeat,
+  mediumMeat,
+  lowMeat,
+  pescetarian,
+  vegetarian,
+  vegan,
+};