ficing all the build errors - checkpoint 2

internal/api/types.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"encoding/json"
 	"time"
 )
 
@@ -22,6 +23,44 @@ func (t Time) Format(layout string) string {
 	return time.Time(t).Format(layout)
 }
 
+// UnmarshalJSON implements json.Unmarshaler interface
+func (t *Time) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	
+	// Try multiple time formats that Garmin might use
+	formats := []string{
+		"2006-01-02T15:04:05.000Z",
+		"2006-01-02T15:04:05Z",
+		"2006-01-02T15:04:05.000",
+		"2006-01-02T15:04:05",
+		time.RFC3339,
+		time.RFC3339Nano,
+	}
+	
+	for _, format := range formats {
+		if parsedTime, err := time.Parse(format, s); err == nil {
+			*t = Time(parsedTime)
+			return nil
+		}
+	}
+	
+	// If none of the formats work, try parsing as RFC3339
+	parsedTime, err := time.Parse(time.RFC3339, s)
+	if err != nil {
+		return err
+	}
+	*t = Time(parsedTime)
+	return nil
+}
+
+// MarshalJSON implements json.Marshaler interface
+func (t Time) MarshalJSON() ([]byte, error) {
+	return json.Marshal(time.Time(t).Format(time.RFC3339))
+}
+
 // BodyComposition represents body composition metrics from Garmin Connect
 type BodyComposition struct {
 	BoneMass   float64 `json:"boneMass"`   // Grams
@@ -35,4 +74,4 @@ type BodyComposition struct {
 type BodyCompositionRequest struct {
 	StartDate Time `json:"startDate"`
 	EndDate   Time `json:"endDate"`
-}
+}