X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=gfit%2Fgfit.go;h=7540bf4dd70fa211cf319f6d7bd86497fe73f681;hb=70d6b9af6e5265c57d3e92bb3b08f902c45cedfc;hp=028eee0cc8f8d5c844545e04410567aa3d97c671;hpb=a1803b210e15430a724d10e7370fd0a0e3256f8b;p=kraftakt.git

diff --git a/gfit/gfit.go b/gfit/gfit.go
index 028eee0..7540bf4 100644
--- a/gfit/gfit.go
+++ b/gfit/gfit.go
@@ -4,11 +4,24 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"strings"
+	"time"
 
 	"github.com/octo/gfitsync/app"
 	"golang.org/x/oauth2"
 	oauth2google "golang.org/x/oauth2/google"
 	fitness "google.golang.org/api/fitness/v1"
+	"google.golang.org/api/googleapi"
+	"google.golang.org/appengine"
+	"google.golang.org/appengine/log"
+)
+
+const (
+	csrfToken = "@CSRFTOKEN@"
+	userID    = "me"
+
+	dataTypeNameCalories = "com.google.calories.expended"
+	dataTypeNameSteps    = "com.google.step_count.delta"
 )
 
 var oauthConfig = &oauth2.Config{
@@ -22,7 +35,13 @@ var oauthConfig = &oauth2.Config{
 	},
 }
 
-const csrfToken = "@CSRFTOKEN@"
+func Application(ctx context.Context) *fitness.Application {
+	return &fitness.Application{
+		Name:       "Fitbit to Google Fit sync",
+		Version:    appengine.VersionID(ctx),
+		DetailsUrl: "", // optional
+	}
+}
 
 func AuthURL() string {
 	return oauthConfig.AuthCodeURL(csrfToken, oauth2.AccessTypeOffline)
@@ -60,3 +79,206 @@ func NewClient(ctx context.Context, u *app.User) (*Client, error) {
 		Service: service,
 	}, nil
 }
+
+func DataStreamID(dataSource *fitness.DataSource) string {
+	fields := []string{
+		dataSource.Type,
+		dataSource.DataType.Name,
+		"@PROJECT_NUMBER@", // FIXME
+	}
+
+	if dev := dataSource.Device; dev != nil {
+		if dev.Manufacturer != "" {
+			fields = append(fields, dev.Manufacturer)
+		}
+		if dev.Model != "" {
+			fields = append(fields, dev.Model)
+		}
+		if dev.Uid != "" {
+			fields = append(fields, dev.Uid)
+		}
+	}
+
+	return strings.Join(fields, ":")
+}
+
+func (c *Client) DataSourceCreate(ctx context.Context, dataSource *fitness.DataSource) (string, error) {
+	res, err := c.Service.Users.DataSources.Create(userID, dataSource).Context(ctx).Do()
+	if err != nil {
+		if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == http.StatusConflict {
+			if dataSource.DataStreamId != "" {
+				return dataSource.DataStreamId, nil
+			}
+			return DataStreamID(dataSource), nil
+		}
+		log.Errorf(ctx, "c.Service.Users.DataSources.Create() = (%+v, %v)", res, err)
+		return "", err
+	}
+	return res.DataStreamId, nil
+}
+
+func (c *Client) DataSetPatch(ctx context.Context, dataSourceID string, points []*fitness.DataPoint) error {
+	startTimeNanos, endTimeNanos := int64(-1), int64(-1)
+	for _, p := range points {
+		if startTimeNanos == -1 || startTimeNanos > p.StartTimeNanos {
+			startTimeNanos = p.StartTimeNanos
+		}
+		if endTimeNanos == -1 || endTimeNanos < p.EndTimeNanos {
+			endTimeNanos = p.EndTimeNanos
+		}
+	}
+	datasetID := fmt.Sprintf("%d-%d", startTimeNanos, endTimeNanos)
+
+	dataset := &fitness.Dataset{
+		DataSourceId:   dataSourceID,
+		MinStartTimeNs: startTimeNanos,
+		MaxEndTimeNs:   endTimeNanos,
+		Point:          points,
+	}
+
+	_, err := c.Service.Users.DataSources.Datasets.Patch(userID, dataSourceID, datasetID, dataset).Context(ctx).Do()
+	if err != nil {
+		log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Patch() = %v", err)
+		return err
+	}
+	return nil
+}
+
+func (c *Client) SetSteps(ctx context.Context, totalSteps int, startOfDay time.Time) error {
+	return c.updateCumulative(ctx,
+		&fitness.DataSource{
+			Application: Application(ctx),
+			DataType: &fitness.DataType{
+				Field: []*fitness.DataTypeField{
+					&fitness.DataTypeField{
+						Name:   "steps",
+						Format: "integer",
+					},
+				},
+				Name: dataTypeNameSteps,
+			},
+			Name: "Step Count",
+			Type: "raw",
+		},
+		&fitness.Value{
+			IntVal: int64(totalSteps),
+		},
+		startOfDay)
+}
+
+func (c *Client) SetCalories(ctx context.Context, totalCalories float64, startOfDay time.Time) error {
+	return c.updateCumulative(ctx,
+		&fitness.DataSource{
+			Application: Application(ctx),
+			DataType: &fitness.DataType{
+				Field: []*fitness.DataTypeField{
+					&fitness.DataTypeField{
+						Name:   "calories",
+						Format: "floatPoint",
+					},
+				},
+				Name: dataTypeNameCalories,
+			},
+			Name: "Calories expended",
+			Type: "raw",
+		},
+		&fitness.Value{
+			FpVal: totalCalories,
+		},
+		startOfDay)
+}
+
+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":
+		if rawValue.IntVal == 0 {
+			return nil
+		}
+	case "floatPoint":
+		if rawValue.FpVal == 0 {
+			return nil
+		}
+	default:
+		return fmt.Errorf("unexpected data type field format %q", f)
+	}
+
+	dataSourceID, err := c.DataSourceCreate(ctx, dataSource)
+	if err != nil {
+		return err
+	}
+	dataSource.DataStreamId = dataSourceID
+
+	endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
+	currValue, startTime, err := c.readCumulative(ctx, dataSource, startOfDay, endOfDay)
+
+	var diffValue fitness.Value
+	if dataSource.DataType.Field[0].Format == "integer" {
+		if rawValue.IntVal == currValue.IntVal {
+			return nil
+		}
+		diffValue.IntVal = rawValue.IntVal - currValue.IntVal
+		if diffValue.IntVal < 0 {
+			log.Warningf(ctx, "stored value (%d) is larger than new value (%d); assuming count was reset", currValue.IntVal, rawValue.IntVal)
+			diffValue.IntVal = rawValue.IntVal
+		}
+	} else { // if dataSource.DataType.Field[0].Format == "floatPoint"
+		if rawValue.FpVal == currValue.FpVal {
+			return nil
+		}
+		diffValue.FpVal = rawValue.FpVal - currValue.FpVal
+		if diffValue.FpVal < 0 {
+			log.Warningf(ctx, "stored value (%g) is larger than new value (%g); assuming count was reset", currValue.FpVal, rawValue.FpVal)
+			diffValue.FpVal = rawValue.FpVal
+		}
+	}
+
+	endTime := endOfDay
+	if now := time.Now().In(startOfDay.Location()); now.Before(endOfDay) {
+		endTime = now
+	}
+	log.Debugf(ctx, "adding cumulative data point: %v-%v %+v", startTime, endTime, diffValue)
+
+	return c.DataSetPatch(ctx, dataSource.DataStreamId, []*fitness.DataPoint{
+		&fitness.DataPoint{
+			DataTypeName:   dataSource.DataType.Name,
+			StartTimeNanos: startTime.UnixNano(),
+			EndTimeNanos:   endTime.UnixNano(),
+			Value:          []*fitness.Value{&diffValue},
+		},
+	})
+}
+
+func (c *Client) readCumulative(ctx context.Context, dataSource *fitness.DataSource, startTime, endTime time.Time) (*fitness.Value, time.Time, error) {
+	datasetID := fmt.Sprintf("%d-%d", startTime.UnixNano(), endTime.UnixNano())
+
+	res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataSource.DataStreamId, datasetID).Context(ctx).Do()
+	if err != nil {
+		log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v", dataSource.DataStreamId, datasetID, err)
+		return nil, time.Time{}, err
+	}
+
+	if len(res.Point) == 0 {
+		return &fitness.Value{}, startTime, nil
+	}
+
+	var sum fitness.Value
+	maxEndTime := startTime
+	for _, p := range res.Point {
+		switch f := dataSource.DataType.Field[0].Format; f {
+		case "integer":
+			sum.IntVal += p.Value[0].IntVal
+		case "floatPoint":
+			sum.FpVal += p.Value[0].FpVal
+		default:
+			return nil, time.Time{}, fmt.Errorf("unexpected data type field format %q", f)
+		}
+
+		pointEndTime := time.Unix(0, p.EndTimeNanos).In(startTime.Location())
+		if maxEndTime.Before(pointEndTime) {
+			maxEndTime = pointEndTime
+		}
+	}
+
+	log.Debugf(ctx, "read cumulative data %s until %v: %+v", dataSource.DataStreamId, maxEndTime, sum)
+	return &sum, maxEndTime, nil
+}