From ab9dff1afb2dea96c1efbf979dc713f89a27f6da Mon Sep 17 00:00:00 2001
From: Florian Forster <ff@octo.it>
Date: Wed, 24 Jan 2018 20:32:36 +0100
Subject: [PATCH] Package gfit: Implement SetActivities().

---
 gfit/gfit.go | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 59 insertions(+), 4 deletions(-)

diff --git a/gfit/gfit.go b/gfit/gfit.go
index 8f3fbac..eca961c 100644
--- a/gfit/gfit.go
+++ b/gfit/gfit.go
@@ -21,10 +21,11 @@ const (
 	csrfToken = "@CSRFTOKEN@"
 	userID    = "me"
 
-	dataTypeNameCalories  = "com.google.calories.expended"
-	dataTypeNameDistance  = "com.google.distance.delta"
-	dataTypeNameSteps     = "com.google.step_count.delta"
-	dataTypeNameHeartrate = "com.google.heart_rate.summary"
+	dataTypeNameCalories        = "com.google.calories.expended"
+	dataTypeNameDistance        = "com.google.distance.delta"
+	dataTypeNameSteps           = "com.google.step_count.delta"
+	dataTypeNameHeartrate       = "com.google.heart_rate.summary"
+	dataTypeNameActivitySegment = "com.google.activity.segment"
 )
 
 var oauthConfig = &oauth2.Config{
@@ -218,6 +219,60 @@ func (c *Client) SetCalories(ctx context.Context, totalCalories float64, startOf
 		startOfDay)
 }
 
+type Activity struct {
+	Start time.Time
+	End   time.Time
+	Type  int64
+}
+
+func (c *Client) SetActivities(ctx context.Context, activities []Activity, startOfDay time.Time) error {
+	dataStreamID := DataStreamID(&fitness.DataSource{
+		DataType: &fitness.DataType{
+			Name: dataTypeNameActivitySegment,
+		},
+		Type: "raw",
+	})
+
+	endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
+
+	datasetID := fmt.Sprintf("%d-%d", startOfDay.UnixNano(), endOfDay.UnixNano())
+	res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataStreamID, datasetID).Context(ctx).Do()
+	if err != nil {
+		log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v", dataStreamID, datasetID, err)
+		return err
+	}
+
+	var dataPoints []*fitness.DataPoint
+Next:
+	for _, a := range activities {
+		startTimeNanos := a.Start.UnixNano()
+		endTimeNanos := a.End.UnixNano()
+
+		for _, p := range res.Point {
+			if p.StartTimeNanos == startTimeNanos &&
+				p.EndTimeNanos == endTimeNanos &&
+				p.Value[0].IntVal == a.Type {
+				continue Next
+			}
+		}
+
+		dataPoints = append(dataPoints, &fitness.DataPoint{
+			DataTypeName:   dataTypeNameActivitySegment,
+			StartTimeNanos: startTimeNanos,
+			EndTimeNanos:   endTimeNanos,
+			Value: []*fitness.Value{
+				&fitness.Value{IntVal: a.Type},
+			},
+		})
+	}
+
+	if len(dataPoints) == 0 {
+		return nil
+	}
+
+	return c.DataSetPatch(ctx, dataStreamID, dataPoints)
+}
+
 func (c *Client) updateCumulative(ctx context.Context, dataSource *fitness.DataSource, rawValue *fitness.Value, startOfDay time.Time) error {
 	switch f := dataSource.DataType.Field[0].Format; f {
 	case "integer":
-- 
2.11.0