lots of stuff, don't truly remember
This commit is contained in:
Blake Ridgway
290
internal/nutrition/service.go
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290
internal/nutrition/service.go
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@@ -0,0 +1,290 @@
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package nutrition
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import (
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"math"
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"time"
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"rideaware/internal/stats"
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"rideaware/internal/user"
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"rideaware/internal/workout"
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"rideaware/pkg/database"
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)
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type Service struct {
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userRepo *user.Repository
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statsRepo *stats.Repository
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workoutRepo *workout.Repository
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}
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func NewService() *Service {
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return &Service{
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userRepo: user.NewRepository(),
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statsRepo: stats.NewRepository(),
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workoutRepo: workout.NewRepository(),
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}
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}
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// NutritionTargets contains calculated daily nutrition targets
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type NutritionTargets struct {
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BMR int `json:"bmr"`
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TDEE int `json:"tdee"`
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DailyCalories int `json:"daily_calories"`
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GoalAdjustment int `json:"goal_adjustment"`
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Protein int `json:"protein_g"`
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Carbs int `json:"carbs_g"`
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Fat int `json:"fat_g"`
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NutritionGoal string `json:"nutrition_goal"`
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DietaryPref string `json:"dietary_preference"`
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CurrentWeight float64 `json:"current_weight"`
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TargetWeight float64 `json:"target_weight"`
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IsConfigured bool `json:"is_configured"`
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}
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// DailyNutrition represents one day's nutrition data
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type DailyNutrition struct {
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Date string `json:"date"`
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BaseCalories int `json:"base_calories"`
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WorkoutCalories int `json:"workout_calories"`
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TotalTarget int `json:"total_target"`
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Protein int `json:"protein_g"`
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Carbs int `json:"carbs_g"`
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Fat int `json:"fat_g"`
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IsTrainingDay bool `json:"is_training_day"`
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WorkoutTitle string `json:"workout_title,omitempty"`
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}
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// WeeklyNutrition contains a week of daily nutrition data
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type WeeklyNutrition struct {
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Days []DailyNutrition `json:"days"`
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AvgCalories int `json:"avg_calories"`
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AvgProtein int `json:"avg_protein_g"`
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AvgCarbs int `json:"avg_carbs_g"`
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AvgFat int `json:"avg_fat_g"`
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TotalWorkoutCal int `json:"total_workout_calories"`
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}
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// CalculateBMR uses Mifflin-St Jeor equation
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func CalculateBMR(weight, height float64, age int, gender string) int {
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if weight <= 0 || height <= 0 || age <= 0 {
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return 0
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}
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bmr := 10.0*weight + 6.25*height - 5.0*float64(age)
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if gender == "female" {
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bmr -= 161
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} else {
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bmr += 5
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}
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return int(math.Round(bmr))
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}
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// CalculateTDEE applies activity multiplier to BMR
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func CalculateTDEE(bmr int, activityLevel string) int {
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multipliers := map[string]float64{
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"sedentary": 1.2,
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"lightly_active": 1.375,
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"active": 1.55,
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"very_active": 1.725,
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}
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mult, ok := multipliers[activityLevel]
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if !ok {
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mult = 1.375 // default to lightly active
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}
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return int(math.Round(float64(bmr) * mult))
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}
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// goalAdjustment returns calorie adjustment for the goal
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func goalAdjustment(goal string) int {
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switch goal {
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case "weight_loss":
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return -500
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case "performance":
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return 300
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default: // maintenance
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return 0
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}
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}
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// macroSplit returns protein/carbs/fat percentages based on dietary preference
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func macroSplit(pref string) (protPct, carbPct, fatPct float64) {
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switch pref {
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case "high_carb":
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return 0.20, 0.60, 0.20
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case "high_protein":
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return 0.35, 0.40, 0.25
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case "keto":
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return 0.30, 0.10, 0.60
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default: // balanced
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return 0.25, 0.50, 0.25
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}
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}
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// calculateMacros converts calories to grams of each macro
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func calculateMacros(calories int, pref string) (protein, carbs, fat int) {
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protPct, carbPct, fatPct := macroSplit(pref)
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protein = int(math.Round(float64(calories) * protPct / 4.0)) // 4 cal/g
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carbs = int(math.Round(float64(calories) * carbPct / 4.0)) // 4 cal/g
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fat = int(math.Round(float64(calories) * fatPct / 9.0)) // 9 cal/g
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return
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}
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// GetTargets calculates nutrition targets for a user
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func (s *Service) GetTargets(userID uint) (*NutritionTargets, error) {
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userObj, err := s.userRepo.GetUserByID(userID)
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if err != nil {
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return nil, err
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}
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profile := userObj.Profile
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if profile == nil {
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return &NutritionTargets{IsConfigured: false}, nil
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}
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// Check if nutrition is configured
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if profile.Height <= 0 || profile.Age <= 0 || profile.Weight <= 0 || profile.Gender == "" {
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return &NutritionTargets{
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IsConfigured: false,
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CurrentWeight: profile.Weight,
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NutritionGoal: profile.NutritionGoal,
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}, nil
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}
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bmr := CalculateBMR(profile.Weight, profile.Height, profile.Age, profile.Gender)
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activityLevel := profile.ActivityLevel
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if activityLevel == "" {
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activityLevel = "lightly_active"
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}
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tdee := CalculateTDEE(bmr, activityLevel)
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goal := profile.NutritionGoal
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if goal == "" {
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goal = "maintenance"
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}
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adj := goalAdjustment(goal)
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dailyCal := tdee + adj
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dietPref := profile.DietaryPref
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if dietPref == "" {
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dietPref = "balanced"
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}
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protein, carbs, fat := calculateMacros(dailyCal, dietPref)
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return &NutritionTargets{
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BMR: bmr,
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TDEE: tdee,
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DailyCalories: dailyCal,
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GoalAdjustment: adj,
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Protein: protein,
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Carbs: carbs,
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Fat: fat,
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NutritionGoal: goal,
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DietaryPref: dietPref,
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CurrentWeight: profile.Weight,
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TargetWeight: profile.TargetWeight,
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IsConfigured: true,
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}, nil
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}
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// GetWeeklyNutrition returns 7 days of nutrition data with workout adjustments
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func (s *Service) GetWeeklyNutrition(userID uint) (*WeeklyNutrition, error) {
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targets, err := s.GetTargets(userID)
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if err != nil {
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return nil, err
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}
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if !targets.IsConfigured {
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return &WeeklyNutrition{Days: []DailyNutrition{}}, nil
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}
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// Get workouts for the next 7 days
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now := time.Now()
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today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
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endDate := today.AddDate(0, 0, 7)
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workouts, err := s.workoutRepo.GetWorkoutsByDateRange(userID, today, endDate)
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if err != nil {
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workouts = []workout.Workout{}
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}
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// Also get past 7 days for completed workout calories
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pastStart := today.AddDate(0, 0, -7)
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pastWorkouts, err := s.workoutRepo.GetWorkoutsByDateRange(userID, pastStart, today)
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if err != nil {
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pastWorkouts = []workout.Workout{}
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}
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allWorkouts := append(pastWorkouts, workouts...)
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// Build workout map by date
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workoutMap := make(map[string][]workout.Workout)
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for _, w := range allWorkouts {
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dateStr := w.ScheduledDate.Format("2006-01-02")
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workoutMap[dateStr] = append(workoutMap[dateStr], w)
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}
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// Get user FTP for calorie estimation
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var ftp int
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database.DB.Table("user_profiles").Select("ftp").Where("user_id = ?", userID).Scan(&ftp)
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days := make([]DailyNutrition, 0, 7)
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totalWorkoutCal := 0
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for i := 0; i < 7; i++ {
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date := today.AddDate(0, 0, i)
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dateStr := date.Format("2006-01-02")
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dayWorkouts := workoutMap[dateStr]
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workoutCal := 0
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isTraining := false
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title := ""
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for _, w := range dayWorkouts {
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if w.CaloriesBurned > 0 {
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workoutCal += w.CaloriesBurned
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} else if w.Duration > 0 && ftp > 0 && w.AvgPower > 0 {
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// Estimate: ~4 cal per kJ, kJ = watts * seconds / 1000
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kj := float64(w.AvgPower) * float64(w.Duration) / 1000.0
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workoutCal += int(kj * 4.0)
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} else if w.Duration > 0 {
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// Rough estimate: ~8 cal/min for cycling
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workoutCal += (w.Duration / 60) * 8
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}
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isTraining = true
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if title == "" {
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title = w.Title
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}
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}
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totalTarget := targets.DailyCalories + workoutCal
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protein, carbs, fat := calculateMacros(totalTarget, targets.DietaryPref)
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days = append(days, DailyNutrition{
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Date: dateStr,
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BaseCalories: targets.DailyCalories,
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WorkoutCalories: workoutCal,
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TotalTarget: totalTarget,
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Protein: protein,
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Carbs: carbs,
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Fat: fat,
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IsTrainingDay: isTraining,
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WorkoutTitle: title,
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})
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totalWorkoutCal += workoutCal
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}
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// Calculate averages
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avgCal, avgProt, avgCarb, avgFat := 0, 0, 0, 0
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for _, d := range days {
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avgCal += d.TotalTarget
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avgProt += d.Protein
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avgCarb += d.Carbs
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avgFat += d.Fat
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}
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return &WeeklyNutrition{
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Days: days,
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AvgCalories: avgCal / 7,
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AvgProtein: avgProt / 7,
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AvgCarbs: avgCarb / 7,
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AvgFat: avgFat / 7,
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TotalWorkoutCal: totalWorkoutCal,
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}, nil
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}
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