feat: add complete workout management system with file parsing

internal/workout/repository.go

@@ -0,0 +1,65 @@
+package workout
+
+import (
+	"errors"
+	"rideaware/pkg/database"
+	"time"
+	"gorm.io/gorm"
+)
+
+type Repository struct{}
+
+func NewRepository() *Repository {
+	return &Repository{}
+}
+
+func (r *Repository) CreateWorkout(workout *Workout) error {
+	return database.DB.Create(workout).Error
+}
+
+func (r *Repository) GetWorkoutByID(id, userID uint) (*Workout, error) {
+	var workout Workout
+	if err := database.DB.Where("id = ? AND user_id = ?", id, userID).
+		First(&workout).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, errors.New("workout not found")
+		}
+		return nil, err
+	}
+	return &workout, nil
+}
+
+func (r *Repository) GetUserWorkouts(userID uint) ([]Workout, error) {
+	var workouts []Workout
+	if err := database.DB.Where("user_id = ?", userID).
+		Order("scheduled_date DESC").
+		Find(&workouts).Error; err != nil {
+		return nil, err
+	}
+	return workouts, nil
+}
+
+func (r *Repository) GetWorkoutsByDateRange(userID uint, start, end time.Time) ([]Workout, error) {
+	var workouts []Workout
+	if err := database.DB.Where("user_id = ? AND scheduled_date BETWEEN ? AND ?", userID, start, end).
+		Order("scheduled_date ASC").
+		Find(&workouts).Error; err != nil {
+		return nil, err
+	}
+	return workouts, nil
+}
+
+func (r *Repository) GetWorkoutsByMonth(userID uint, year, month int) ([]Workout, error) {
+	start := time.Date(year, time.Month(month), 1, 0, 0, 0, 0, time.UTC)
+	end := start.AddDate(0, 1, 0).Add(-time.Second)
+	return r.GetWorkoutsByDateRange(userID, start, end)
+}
+
+func (r *Repository) UpdateWorkout(workout *Workout) error {
+	return database.DB.Model(workout).Updates(workout).Error
+}
+
+func (r *Repository) DeleteWorkout(id, userID uint) error {
+	return database.DB.Where("id = ? AND user_id = ?", id, userID).
+		Delete(&Workout{}).Error
+}