feat: add complete workout management system with file parsing

internal/workout/model.go

@@ -0,0 +1,66 @@
+package workout
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"time"
+)
+
+type Workout struct {
+	ID             uint            `gorm:"primaryKey" json:"id"`
+	UserID         uint            `gorm:"not null;index" json:"user_id"`
+	Title          string          `gorm:"not null" json:"title"`
+	Description    string          `gorm:"default:''" json:"description"`
+	Type           string          `gorm:"default:''" json:"type"`
+	Status         string          `gorm:"default:'planned'" json:"status"`
+	ScheduledDate  time.Time       `gorm:"index" json:"scheduled_date"`
+	Duration       int             `gorm:"default:0" json:"duration"`
+	Distance       float64         `gorm:"default:0" json:"distance"`
+	ElevGain       int             `gorm:"default:0" json:"elev_gain"`
+	AvgPower       int             `gorm:"default:0" json:"avg_power"`
+	AvgHR          int             `gorm:"default:0" json:"avg_hr"`
+	MaxPower       int             `gorm:"default:0" json:"max_power"`
+	MaxHR          int             `gorm:"default:0" json:"max_hr"`
+	CaloriesBurned int             `gorm:"default:0" json:"calories_burned"`
+	FileType       string          `gorm:"default:''" json:"file_type"`
+	FileURL        string          `gorm:"default:''" json:"file_url"`
+	WorkoutData    WorkoutDataJSON `gorm:"type:jsonb" json:"workout_data,omitempty"`
+	Notes          string          `json:"notes"`
+	CreatedAt      time.Time       `json:"created_at"`
+	UpdatedAt      time.Time       `json:"updated_at"`
+}
+
+type WorkoutDataJSON struct {
+	Name          string            `json:"name"`
+	Author        string            `json:"author"`
+	TotalDuration int               `json:"total_duration"`
+	Segments      []WorkoutSegment  `json:"segments"`
+}
+
+type WorkoutSegment struct {
+	Type      string  `json:"type"`
+	Duration  int     `json:"duration"`
+	PowerLow  float64 `json:"power_low"`
+	PowerHigh float64 `json:"power_high"`
+	Power     float64 `json:"power"`
+	Cadence   int     `json:"cadence"`
+}
+
+// Scan implements sql.Scanner interface
+func (w *WorkoutDataJSON) Scan(value interface{}) error {
+	if value == nil {
+		*w = WorkoutDataJSON{}
+		return nil
+	}
+	bytes := value.([]byte)
+	return json.Unmarshal(bytes, &w)
+}
+
+// Value implements driver.Valuer interface
+func (w WorkoutDataJSON) Value() (driver.Value, error) {
+	return json.Marshal(w)
+}
+
+func (Workout) TableName() string {
+	return "workouts"
+}