10 "github.com/octo/gfitsync/app"
11 "github.com/octo/gfitsync/fitbit"
13 oauth2google "golang.org/x/oauth2/google"
14 fitness "google.golang.org/api/fitness/v1"
15 "google.golang.org/api/googleapi"
16 "google.golang.org/appengine"
17 "google.golang.org/appengine/log"
21 csrfToken = "@CSRFTOKEN@"
24 dataTypeNameCalories = "com.google.calories.expended"
25 dataTypeNameDistance = "com.google.distance.delta"
26 dataTypeNameSteps = "com.google.step_count.delta"
27 dataTypeNameHeartrate = "com.google.heart_rate.summary"
28 dataTypeNameActivitySegment = "com.google.activity.segment"
31 var oauthConfig = &oauth2.Config{
32 ClientID: "@GOOGLE_CLIENT_ID@",
33 ClientSecret: "@GOOGLE_CLIENT_SECRET@",
34 Endpoint: oauth2google.Endpoint,
35 RedirectURL: "https://kraftakt.octo.it/google/grant",
37 fitness.FitnessActivityWriteScope,
38 fitness.FitnessBodyWriteScope,
39 fitness.FitnessLocationWriteScope,
43 func Application(ctx context.Context) *fitness.Application {
44 return &fitness.Application{
45 Name: "Fitbit to Google Fit sync",
46 Version: appengine.VersionID(ctx),
47 DetailsUrl: "", // optional
51 func AuthURL() string {
52 return oauthConfig.AuthCodeURL(csrfToken, oauth2.AccessTypeOffline)
55 func ParseToken(ctx context.Context, r *http.Request, u *app.User) error {
56 if state := r.FormValue("state"); state != csrfToken {
57 return fmt.Errorf("invalid state parameter: %q", state)
60 tok, err := oauthConfig.Exchange(ctx, r.FormValue("code"))
65 return u.SetToken(ctx, "Google", tok)
72 func NewClient(ctx context.Context, u *app.User) (*Client, error) {
73 c, err := u.OAuthClient(ctx, "Google", oauthConfig)
78 service, err := fitness.New(c)
88 func DataStreamID(dataSource *fitness.DataSource) string {
91 dataSource.DataType.Name,
92 "@PROJECT_NUMBER@", // FIXME
95 if dev := dataSource.Device; dev != nil {
96 if dev.Manufacturer != "" {
97 fields = append(fields, dev.Manufacturer)
100 fields = append(fields, dev.Model)
103 fields = append(fields, dev.Uid)
107 if dataSource.DataStreamName != "" {
108 fields = append(fields, dataSource.DataStreamName)
111 return strings.Join(fields, ":")
114 func (c *Client) DataSourceCreate(ctx context.Context, dataSource *fitness.DataSource) (string, error) {
115 res, err := c.Service.Users.DataSources.Create(userID, dataSource).Context(ctx).Do()
117 if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == http.StatusConflict {
118 if dataSource.DataStreamId != "" {
119 return dataSource.DataStreamId, nil
121 return DataStreamID(dataSource), nil
123 log.Errorf(ctx, "c.Service.Users.DataSources.Create() = (%+v, %v)", res, err)
126 return res.DataStreamId, nil
129 func (c *Client) DataSetPatch(ctx context.Context, dataSourceID string, points []*fitness.DataPoint) error {
130 startTimeNanos, endTimeNanos := int64(-1), int64(-1)
131 for _, p := range points {
132 if startTimeNanos == -1 || startTimeNanos > p.StartTimeNanos {
133 startTimeNanos = p.StartTimeNanos
135 if endTimeNanos == -1 || endTimeNanos < p.EndTimeNanos {
136 endTimeNanos = p.EndTimeNanos
139 datasetID := fmt.Sprintf("%d-%d", startTimeNanos, endTimeNanos)
141 dataset := &fitness.Dataset{
142 DataSourceId: dataSourceID,
143 MinStartTimeNs: startTimeNanos,
144 MaxEndTimeNs: endTimeNanos,
148 _, err := c.Service.Users.DataSources.Datasets.Patch(userID, dataSourceID, datasetID, dataset).Context(ctx).Do()
150 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Patch() = %v", err)
156 func (c *Client) SetDistance(ctx context.Context, meters float64, startOfDay time.Time) error {
157 return c.updateCumulative(ctx,
159 Application: Application(ctx),
160 DataType: &fitness.DataType{
161 Field: []*fitness.DataTypeField{
162 &fitness.DataTypeField{
164 Format: "floatPoint",
167 Name: dataTypeNameDistance,
169 Name: "Distance covered",
178 func (c *Client) SetSteps(ctx context.Context, totalSteps int, startOfDay time.Time) error {
179 return c.updateCumulative(ctx,
181 Application: Application(ctx),
182 DataType: &fitness.DataType{
183 Field: []*fitness.DataTypeField{
184 &fitness.DataTypeField{
189 Name: dataTypeNameSteps,
195 IntVal: int64(totalSteps),
200 func (c *Client) SetCalories(ctx context.Context, totalCalories float64, startOfDay time.Time) error {
201 return c.updateCumulative(ctx,
203 Application: Application(ctx),
204 DataType: &fitness.DataType{
205 Field: []*fitness.DataTypeField{
206 &fitness.DataTypeField{
208 Format: "floatPoint",
211 Name: dataTypeNameCalories,
213 Name: "Calories expended",
217 FpVal: totalCalories,
222 type Activity struct {
228 func (a Activity) String() string {
229 return fmt.Sprintf("%s-%s %d", a.Start.Format("15:04:05"), a.End.Format("15:04:05"), a.Type)
232 func (c *Client) SetActivities(ctx context.Context, activities []Activity, startOfDay time.Time) error {
233 dataStreamID := DataStreamID(&fitness.DataSource{
234 DataType: &fitness.DataType{
235 Name: dataTypeNameActivitySegment,
240 endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
242 datasetID := fmt.Sprintf("%d-%d", startOfDay.UnixNano(), endOfDay.UnixNano())
243 res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataStreamID, datasetID).Context(ctx).Do()
245 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v", dataStreamID, datasetID, err)
249 var dataPoints []*fitness.DataPoint
251 for _, a := range activities {
252 startTimeNanos := a.Start.UnixNano()
253 endTimeNanos := a.End.UnixNano()
255 for _, p := range res.Point {
256 if p.StartTimeNanos == startTimeNanos && p.EndTimeNanos == endTimeNanos && p.Value[0].IntVal == a.Type {
257 log.Debugf(ctx, "activity %s already stored in Google Fit", a)
262 log.Debugf(ctx, "activity %s will be added to Google Fit", a)
263 dataPoints = append(dataPoints, &fitness.DataPoint{
264 DataTypeName: dataTypeNameActivitySegment,
265 StartTimeNanos: startTimeNanos,
266 EndTimeNanos: endTimeNanos,
267 Value: []*fitness.Value{
268 &fitness.Value{IntVal: a.Type},
273 if len(dataPoints) == 0 {
277 return c.DataSetPatch(ctx, dataStreamID, dataPoints)
280 func (c *Client) updateCumulative(ctx context.Context, dataSource *fitness.DataSource, rawValue *fitness.Value, startOfDay time.Time) error {
281 switch f := dataSource.DataType.Field[0].Format; f {
283 if rawValue.IntVal == 0 {
287 if rawValue.FpVal == 0 {
291 return fmt.Errorf("unexpected data type field format %q", f)
294 dataSourceID, err := c.DataSourceCreate(ctx, dataSource)
298 dataSource.DataStreamId = dataSourceID
300 endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
301 currValue, startTime, err := c.readCumulative(ctx, dataSource, startOfDay, endOfDay)
306 var diffValue fitness.Value
307 if dataSource.DataType.Field[0].Format == "integer" {
308 if rawValue.IntVal == currValue.IntVal {
311 diffValue.IntVal = rawValue.IntVal - currValue.IntVal
312 if diffValue.IntVal < 0 {
313 log.Warningf(ctx, "stored value (%d) is larger than new value (%d); assuming count was reset", currValue.IntVal, rawValue.IntVal)
314 diffValue.IntVal = rawValue.IntVal
316 } else { // if dataSource.DataType.Field[0].Format == "floatPoint"
317 if rawValue.FpVal == currValue.FpVal {
320 diffValue.FpVal = rawValue.FpVal - currValue.FpVal
321 if diffValue.FpVal < 0 {
322 log.Warningf(ctx, "stored value (%g) is larger than new value (%g); assuming count was reset", currValue.FpVal, rawValue.FpVal)
323 diffValue.FpVal = rawValue.FpVal
328 if now := time.Now().In(startOfDay.Location()); now.Before(endOfDay) {
331 log.Debugf(ctx, "adding cumulative data point: %v-%v %+v", startTime, endTime, diffValue)
333 return c.DataSetPatch(ctx, dataSource.DataStreamId, []*fitness.DataPoint{
335 DataTypeName: dataSource.DataType.Name,
336 StartTimeNanos: startTime.UnixNano(),
337 EndTimeNanos: endTime.UnixNano(),
338 Value: []*fitness.Value{&diffValue},
343 func (c *Client) readCumulative(ctx context.Context, dataSource *fitness.DataSource, startTime, endTime time.Time) (*fitness.Value, time.Time, error) {
344 datasetID := fmt.Sprintf("%d-%d", startTime.UnixNano(), endTime.UnixNano())
346 res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataSource.DataStreamId, datasetID).Context(ctx).Do()
348 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v", dataSource.DataStreamId, datasetID, err)
349 return nil, time.Time{}, err
352 if len(res.Point) == 0 {
353 return &fitness.Value{}, startTime, nil
356 var sum fitness.Value
357 maxEndTime := startTime
358 for _, p := range res.Point {
359 switch f := dataSource.DataType.Field[0].Format; f {
361 sum.IntVal += p.Value[0].IntVal
363 sum.FpVal += p.Value[0].FpVal
365 return nil, time.Time{}, fmt.Errorf("unexpected data type field format %q", f)
368 pointEndTime := time.Unix(0, p.EndTimeNanos).In(startTime.Location())
369 if maxEndTime.Before(pointEndTime) {
370 maxEndTime = pointEndTime
374 log.Debugf(ctx, "read cumulative data %s until %v: %+v", dataSource.DataStreamId, maxEndTime, sum)
375 return &sum, maxEndTime, nil
378 type heartRateDuration struct {
381 Duration time.Duration
384 type heartRateDurations []*heartRateDuration
386 func (res heartRateDurations) find(min, max int) (*heartRateDuration, bool) {
387 for _, d := range res {
388 if d.Min != min || d.Max != max {
397 func (c *Client) heartRate(ctx context.Context, dataSource *fitness.DataSource, startTime, endTime time.Time) (heartRateDurations, time.Time, error) {
398 datasetID := fmt.Sprintf("%d-%d", startTime.UnixNano(), endTime.UnixNano())
400 res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataSource.DataStreamId, datasetID).Context(ctx).Do()
402 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v", dataSource.DataStreamId, datasetID, err)
403 return nil, time.Time{}, err
406 if len(res.Point) == 0 {
407 return nil, startTime, nil
410 var results heartRateDurations
411 maxEndTime := startTime
412 for _, p := range res.Point {
413 max := int(p.Value[1].FpVal)
414 min := int(p.Value[2].FpVal)
415 duration := time.Unix(0, p.EndTimeNanos).Sub(time.Unix(0, p.StartTimeNanos))
417 if d, ok := results.find(min, max); ok {
418 d.Duration += duration
420 results = append(results, &heartRateDuration{
427 pointEndTime := time.Unix(0, p.EndTimeNanos).In(startTime.Location())
428 if maxEndTime.Before(pointEndTime) {
429 maxEndTime = pointEndTime
433 return results, maxEndTime, nil
436 func (c *Client) SetHeartRate(ctx context.Context, totalDurations []fitbit.HeartRateZone, restingHeartRate int, startOfDay time.Time) error {
437 dataSource := &fitness.DataSource{
438 Application: Application(ctx),
439 DataType: &fitness.DataType{
440 Field: []*fitness.DataTypeField{
441 &fitness.DataTypeField{
443 Format: "floatPoint",
445 &fitness.DataTypeField{
447 Format: "floatPoint",
449 &fitness.DataTypeField{
451 Format: "floatPoint",
454 Name: dataTypeNameHeartrate,
456 Name: "Heart rate summary",
460 dataSourceID, err := c.DataSourceCreate(ctx, dataSource)
464 dataSource.DataStreamId = dataSourceID
466 endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
467 prevDurations, startTime, err := c.heartRate(ctx, dataSource, startOfDay, endOfDay)
469 // calculate the difference between the durations mentioned in
470 // totalDurations and prevDurations and store it in diffDurations.
471 var diffDurations heartRateDurations
472 for _, d := range totalDurations {
473 total := time.Duration(d.Minutes) * time.Minute
475 var prev time.Duration
476 if res, ok := prevDurations.find(d.Min, d.Max); ok {
485 if res, ok := diffDurations.find(d.Min, d.Max); ok {
488 diffDurations = append(diffDurations, &heartRateDuration{
496 // create a fitness.DataPoint for each non-zero duration difference.
497 var dataPoints []*fitness.DataPoint
498 for _, d := range diffDurations {
499 if d.Duration < time.Nanosecond {
503 endTime := startTime.Add(d.Duration)
504 if endTime.After(endOfDay) {
505 log.Warningf(ctx, "heart rate durations exceed one day (current end time: %v)", endTime)
509 average := float64(d.Min+d.Max) / 2.0
510 if d.Min <= restingHeartRate && restingHeartRate <= d.Max {
511 average = float64(restingHeartRate)
514 dataPoints = append(dataPoints, &fitness.DataPoint{
515 DataTypeName: dataSource.DataType.Name,
516 StartTimeNanos: startTime.UnixNano(),
517 EndTimeNanos: endTime.UnixNano(),
518 Value: []*fitness.Value{
523 FpVal: float64(d.Max),
526 FpVal: float64(d.Min),
534 if len(dataPoints) == 0 {
537 return c.DataSetPatch(ctx, dataSource.DataStreamId, dataPoints)