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import { formatISO } from 'date-fns';
// Types
import {
LunchPlansResponse,
FormattedLunchPlan,
OfficeStats,
MealMenu,
Meal,
MealPlansResponse,
FormattedMealPlan,
OfficeMealStats,
Meals,
} from '@/types';
// Utils
import { formatDateToISODateString } from '@/utils';
/**
* Format a list of lunch menus by converting their dates to a specific time zone
* and formatting them into ISO 8601 strings.
*
* @param plan - The array of MealMenu objects to format. Defaults to an empty array.
* @param timeZone - The IANA time zone string to convert dates into. Defaults to 'Asia/Ho_Chi_Minh'.
* @returns A new array of MealMenu objects with `date` formatted to the specified time zone.
*/
export const formatLunchMenus = (
plan: MealMenu[] = [],
timeZone: string = 'Asia/Ho_Chi_Minh',
): MealMenu[] => {
return plan.map(({ date, ...rest }) => {
const zonedDate = formatISO(toZonedTime(date, timeZone));
return {
date: zonedDate,
...rest,
};
});
};
/**
* Formats raw lunch plan data into a normalized structure for easier consumption.
*
* @param plan - Array of lunch plan responses from the backend API.
* Each object contains total counts and per-office meal values.
*
* @returns Array of FormattedLunchPlan objects, where each contains:
* - date: The date of the lunch plan.
* - totalVegan: Total vegan meals planned.
* - totalNormal: Total regular meals planned.
* - stats: Per-office stats including actual meal values and changes.
*/
export const formatLunchPlans = (
plan: LunchPlansResponse[] = [],
timeZone: string = 'Asia/Ho_Chi_Minh',
): FormattedLunchPlan[] => {
return plan.map(({ date, totalVegan, totalNormal, data, isHoliday }) => {
const zonedDate = formatISO(toZonedTime(date, timeZone));
const stats: OfficeStats[] = Object.entries(data).map(
([office, values]) => {
const {
vegan: { value: veganValue = 0, diff: veganDiff = 0 } = {},
normal: { value: normalValue = 0, diff: normalDiff = 0 } = {},
} = values;
return {
office,
veganMeals: veganValue + veganDiff,
normalMeals: normalValue + normalDiff,
changeNumber: veganDiff + normalDiff,
};
},
);
return {
date: zonedDate,
totalVeganMeals: totalVegan,
totalNormalMeals: totalNormal,
stats,
isHoliday,
};
});
};
/**
* Merge raw meal menu data with formatted meal plans by matching dates.
*
* @param meals - Array of MealMenu objects, typically fetched from the kitchen/menu service.
* @param plans - Array of FormattedLunchPlan objects generated from `formatLunchPlan`.
*
* @returns Array of enriched Meal objects
*/
export const mergePlansIntoMeals = (
menus: MealMenu[] = [],
plans: FormattedMealPlan[] = [],
): Meals[] => {
if (!menus.length) {
return plans.map(
({
date,
totalVeganMeals,
totalLunchNormalMeals,
totalBreakfastNormalMeals,
stats,
isHoliday,
}) => ({
date,
dailyStats: {
totalLunchNormalMeals,
totalVeganMeals,
totalBreakfastNormalMeals,
stats,
},
isHoliday,
}),
) as Meals[];
}
const plansMap = new Map(
plans.map((plan) => [formatDateToISODateString(plan.date), plan]),
);
return menus.map((meal) => {
const mealDate = formatDateToISODateString(meal.date);
const matchingPlans = plansMap.get(mealDate);
if (matchingPlans) {
const {
totalVeganMeals,
totalLunchNormalMeals,
totalBreakfastNormalMeals,
stats,
} = matchingPlans;
return {
...meal,
dailyStats: {
totalLunchNormalMeals,
totalVeganMeals,
totalBreakfastNormalMeals,
stats,
},
};
}
return meal;
});
};
export const formatMealPlans = (
plan: MealPlansResponse[] = [],
timeZone: string = 'Asia/Ho_Chi_Minh',
): FormattedMealPlan[] => {
return plan.map(({ date, total, data, isHoliday }) => {
const zonedDate = formatISO(toZonedTime(date, timeZone));
// Extract totals properly from nested structure
const totalVeganMeals = total.lunch.vegan;
const totalLunchNormalMeals = total.lunch.normal;
const totalBreakfastNormalMeals = total.breakfast.normal;
const stats: OfficeMealStats[] = Object.entries(data).map(
([office, values]) => {
const {
lunch: {
vegan: { value: veganValue = 0, diff: veganDiff = 0 } = {},
normal: { value: normalValue = 0, diff: normalDiff = 0 } = {},
},
breakfast: {
normal: { value: breakfastValue = 0, diff: breakfastDiff = 0 } = {},
},
} = values;
return {
office,
veganMeals: veganValue + veganDiff,
normalMeals: normalValue + normalDiff,
normaBreakfastNlMeals: breakfastValue + breakfastDiff,
changeNumber: veganDiff + normalDiff + breakfastDiff,
};
},
);
return {
date: zonedDate,
totalVeganMeals,
totalLunchNormalMeals,
totalBreakfastNormalMeals,
stats,
isHoliday,
};
});
};
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