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Jp
340
utils/index.js
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340
utils/index.js
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const db = require('../models');
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const { Op } = require('sequelize');
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function calculateBMR(weightKg, heightCm, age, gender) {
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// Calculate Basal Metabolic Rate using Mifflin-St Jeor Equation
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let bmr;
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if (gender.toLowerCase() === 'male') {
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bmr = (10 * weightKg) + (6.25 * heightCm) - (5 * age) + 5;
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} else {
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// female
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bmr = (10 * weightKg) + (6.25 * heightCm) - (5 * age) - 161;
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}
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return Math.round(bmr);
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}
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function calculateTDEE(bmr, activityLevel) {
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// Calculate Total Daily Energy Expenditure
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const multipliers = {
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'sedentary': 1.2,
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'light': 1.375,
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'moderate': 1.55,
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'active': 1.725,
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'very_active': 1.9
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};
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const multiplier = multipliers[activityLevel] || 1.55;
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return Math.round(bmr * multiplier);
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}
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function calculateMacroTargets(weightKg, goalType = 'recomp') {
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// Calculate macro targets based on body weight and goal
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let protein, carbs, fat;
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if (goalType === 'muscle_gain') {
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protein = weightKg * 2.4; // High protein for muscle building
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carbs = weightKg * 3.5; // Higher carbs for energy
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fat = weightKg * 1.0; // Moderate fat
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} else if (goalType === 'weight_loss') {
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protein = weightKg * 2.2; // High protein to preserve muscle
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carbs = weightKg * 2.0; // Lower carbs for deficit
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fat = weightKg * 0.8; // Lower fat
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} else {
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// recomp (body recomposition)
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protein = weightKg * 2.2; // High protein
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carbs = weightKg * 2.5; // Moderate carbs
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fat = weightKg * 0.9; // Moderate fat
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}
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return {
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protein_g: Math.round(protein),
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carbs_g: Math.round(carbs),
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fat_g: Math.round(fat)
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};
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}
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async function calculateDailyTotals(userId, targetDate = null) {
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// Calculate total nutrition consumed for a given date
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if (!targetDate) {
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targetDate = new Date();
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}
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// Ensure date is in YYYY-MM-DD format if it's a string, or create date object
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const dateStr = targetDate instanceof Date ? targetDate.toISOString().split('T')[0] : targetDate;
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// Get all meals for the date
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const meals = await db.Meal.findAll({
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where: {
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user_id: userId,
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date: dateStr
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},
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include: [{
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model: db.MealFood,
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include: [db.FoodItem]
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}]
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});
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const totals = {
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calories: 0,
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protein: 0,
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carbs: 0,
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fat: 0,
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meals: []
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};
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for (const meal of meals) {
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const mealTotals = {
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calories: 0,
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protein: 0,
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carbs: 0,
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fat: 0
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};
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const mealFoods = [];
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for (const mf of meal.MealFoods) {
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// Calculate nutrition for this food item based on quantity
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// If calculated values exist in MealFood, use them, otherwise calculate
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const quantity = mf.quantity || 1.0;
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const food = mf.FoodItem;
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const calories = mf.calories_consumed || (food.calories * quantity);
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const protein = mf.protein_consumed || (food.protein_g * quantity);
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const carbs = mf.carbs_consumed || (food.carbs_g * quantity);
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const fat = mf.fat_consumed || (food.fat_g * quantity);
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mealTotals.calories += calories;
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mealTotals.protein += protein;
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mealTotals.carbs += carbs;
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mealTotals.fat += fat;
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mealFoods.push({
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name: food.name,
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quantity: quantity,
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calories: calories
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});
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}
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totals.calories += mealTotals.calories;
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totals.protein += mealTotals.protein;
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totals.carbs += mealTotals.carbs;
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totals.fat += mealTotals.fat;
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totals.meals.push({
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id: meal.id,
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type: meal.meal_type,
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time: meal.time ? meal.time.substring(0, 5) : null,
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totals: mealTotals,
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foods: mealFoods
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});
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}
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return totals;
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}
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async function calculateWaterTotal(userId, targetDate = null) {
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// Calculate total water intake for a given date
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if (!targetDate) {
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targetDate = new Date();
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}
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const dateStr = targetDate instanceof Date ? targetDate.toISOString().split('T')[0] : targetDate;
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const waterLogs = await db.WaterLog.findAll({
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where: {
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user_id: userId,
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date: dateStr
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}
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});
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const total = waterLogs.reduce((sum, log) => sum + log.amount_ml, 0);
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return {
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total_ml: total,
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logs: waterLogs.map(log => ({
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id: log.id,
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amount_ml: log.amount_ml,
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time: log.time ? log.time.substring(0, 5) : null
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}))
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};
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}
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async function getWeightTrend(userId, days = 7) {
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// Get weight trend for the past N days
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const endDate = new Date();
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const startDate = new Date();
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startDate.setDate(endDate.getDate() - (days - 1));
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const startDateStr = startDate.toISOString().split('T')[0];
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const endDateStr = endDate.toISOString().split('T')[0];
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const weightLogs = await db.WeightLog.findAll({
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where: {
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user_id: userId,
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date: {
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[Op.between]: [startDateStr, endDateStr]
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}
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},
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order: [['date', 'ASC']]
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});
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return weightLogs.map(log => ({
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date: log.date,
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weight_kg: log.weight_kg
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}));
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}
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async function getCalorieTrend(userId, days = 7) {
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// Get calorie intake trend for the past N days
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const endDate = new Date();
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const startDate = new Date();
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startDate.setDate(endDate.getDate() - (days - 1));
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const trend = [];
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let currentDate = new Date(startDate);
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while (currentDate <= endDate) {
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const dateStr = currentDate.toISOString().split('T')[0];
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const totals = await calculateDailyTotals(userId, dateStr);
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trend.push({
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date: dateStr,
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calories: Math.round(totals.calories),
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protein: Math.round(totals.protein),
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carbs: Math.round(totals.carbs),
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fat: Math.round(totals.fat)
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});
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currentDate.setDate(currentDate.getDate() + 1);
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}
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return trend;
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}
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async function updateDailySummary(userId, targetDate = null) {
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// Update or create daily summary for a user
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if (!targetDate) {
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targetDate = new Date();
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}
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const dateStr = targetDate instanceof Date ? targetDate.toISOString().split('T')[0] : targetDate;
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// Calculate totals
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const nutrition = await calculateDailyTotals(userId, dateStr);
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const water = await calculateWaterTotal(userId, dateStr);
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// Get weight for the day
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const weightLog = await db.WeightLog.findOne({
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where: {
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user_id: userId,
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date: dateStr
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}
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});
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const weight = weightLog ? weightLog.weight_kg : null;
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// Get user's calorie target
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const user = await db.User.findByPk(userId);
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const targetCalories = user ? user.target_daily_calories : 2000;
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// Find or create summary
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let summary = await db.DailySummary.findOne({
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where: {
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user_id: userId,
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date: dateStr
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}
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});
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if (!summary) {
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summary = await db.DailySummary.create({
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user_id: userId,
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date: dateStr
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});
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}
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// Update values
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summary.total_calories = nutrition.calories;
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summary.total_protein_g = nutrition.protein;
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summary.total_carbs_g = nutrition.carbs;
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summary.total_fat_g = nutrition.fat;
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summary.total_water_ml = water.total_ml;
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summary.calories_remaining = targetCalories - nutrition.calories;
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summary.weight_kg = weight;
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try {
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await summary.save();
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return summary;
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} catch (e) {
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console.error(`Error updating daily summary: ${e}`);
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return null;
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}
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}
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function getMacroPercentages(proteinG, carbsG, fatG) {
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// Calculate macro distribution as percentages
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const proteinCal = proteinG * 4;
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const carbsCal = carbsG * 4;
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const fatCal = fatG * 9;
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const totalCal = proteinCal + carbsCal + fatCal;
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if (totalCal === 0) {
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return { protein: 0, carbs: 0, fat: 0 };
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}
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return {
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protein: Math.round((proteinCal / totalCal) * 100),
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carbs: Math.round((carbsCal / totalCal) * 100),
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fat: Math.round((fatCal / totalCal) * 100)
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};
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}
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function suggestFoodsForMacros(remainingProtein, remainingCarbs, remainingFat) {
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// Suggest Filipino foods based on remaining macros
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const suggestions = [];
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// High protein needed
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if (remainingProtein > 30) {
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suggestions.push({
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category: 'High Protein Ulam',
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examples: ['Grilled Tilapia', 'Chicken Tinola', 'Grilled Chicken']
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});
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}
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// High carbs needed
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if (remainingCarbs > 40) {
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suggestions.push({
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category: 'Carbs',
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examples: ['White Rice', 'Pandesal', 'Sweet Potato']
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});
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}
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// High fat needed
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if (remainingFat > 20) {
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suggestions.push({
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category: 'Healthy Fats',
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examples: ['Sisig', 'Lechon Kawali', 'Bicol Express']
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});
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}
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// Balanced meal needed
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if (remainingProtein > 20 && remainingCarbs > 30) {
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suggestions.push({
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category: 'Balanced Meals',
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examples: ['Tapsilog', 'Chicken Adobo with Rice', 'Sinigang']
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});
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}
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return suggestions;
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}
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module.exports = {
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calculateBMR,
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calculateTDEE,
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calculateMacroTargets,
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calculateDailyTotals,
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calculateWaterTotal,
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getWeightTrend,
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getCalorieTrend,
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updateDailySummary,
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getMacroPercentages,
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suggestFoodsForMacros
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};
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