10 "github.com/octo/gfitsync/app"
12 oauth2google "golang.org/x/oauth2/google"
13 fitness "google.golang.org/api/fitness/v1"
14 "google.golang.org/api/googleapi"
15 "google.golang.org/appengine"
16 "google.golang.org/appengine/log"
20 csrfToken = "@CSRFTOKEN@"
23 dataTypeNameSteps = "com.google.step_count.delta"
26 var oauthConfig = &oauth2.Config{
27 ClientID: "@GOOGLE_CLIENT_ID@",
28 ClientSecret: "@GOOGLE_CLIENT_SECRET@",
29 Endpoint: oauth2google.Endpoint,
30 RedirectURL: "https://fitbit-gfit-sync.appspot.com/google/grant",
32 fitness.FitnessActivityWriteScope,
33 fitness.FitnessBodyWriteScope,
37 func Application(ctx context.Context) *fitness.Application {
38 return &fitness.Application{
39 Name: "Fitbit to Google Fit sync",
40 Version: appengine.VersionID(ctx),
41 DetailsUrl: "", // optional
45 func AuthURL() string {
46 return oauthConfig.AuthCodeURL(csrfToken, oauth2.AccessTypeOffline)
49 func ParseToken(ctx context.Context, r *http.Request, u *app.User) error {
50 if state := r.FormValue("state"); state != csrfToken {
51 return fmt.Errorf("invalid state parameter: %q", state)
54 tok, err := oauthConfig.Exchange(ctx, r.FormValue("code"))
59 return u.SetToken(ctx, "Google", tok)
66 func NewClient(ctx context.Context, u *app.User) (*Client, error) {
67 c, err := u.OAuthClient(ctx, "Google", oauthConfig)
72 service, err := fitness.New(c)
82 func DataStreamID(dataSource *fitness.DataSource) string {
85 dataSource.DataType.Name,
86 "@PROJECT_NUMBER@", // FIXME
89 if dev := dataSource.Device; dev != nil {
90 if dev.Manufacturer != "" {
91 fields = append(fields, dev.Manufacturer)
94 fields = append(fields, dev.Model)
97 fields = append(fields, dev.Uid)
101 return strings.Join(fields, ":")
104 func (c *Client) DataSourceCreate(ctx context.Context, dataSource *fitness.DataSource) (string, error) {
105 res, err := c.Service.Users.DataSources.Create(userID, dataSource).Context(ctx).Do()
107 if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == http.StatusConflict {
108 if dataSource.DataStreamId != "" {
109 return dataSource.DataStreamId, nil
111 return DataStreamID(dataSource), nil
113 log.Errorf(ctx, "c.Service.Users.DataSources.Create() = (%+v, %v)", res, err)
116 return res.DataStreamId, nil
119 func (c *Client) DataSetPatch(ctx context.Context, dataSourceID string, points []*fitness.DataPoint) error {
120 startTimeNanos, endTimeNanos := int64(-1), int64(-1)
121 for _, p := range points {
122 if startTimeNanos == -1 || startTimeNanos > p.StartTimeNanos {
123 startTimeNanos = p.StartTimeNanos
125 if endTimeNanos == -1 || endTimeNanos < p.EndTimeNanos {
126 endTimeNanos = p.EndTimeNanos
129 datasetID := fmt.Sprintf("%d-%d", startTimeNanos, endTimeNanos)
131 dataset := &fitness.Dataset{
132 DataSourceId: dataSourceID,
133 MinStartTimeNs: startTimeNanos,
134 MaxEndTimeNs: endTimeNanos,
138 _, err := c.Service.Users.DataSources.Datasets.Patch(userID, dataSourceID, datasetID, dataset).Context(ctx).Do()
140 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Patch() = %v", err)
146 func (c *Client) Steps(ctx context.Context, startTime, endTime time.Time) (int, time.Time, error) {
147 dataSourceID := DataStreamID(&fitness.DataSource{
149 DataType: &fitness.DataType{
150 Name: dataTypeNameSteps,
153 datasetID := fmt.Sprintf("%d-%d", startTime.UnixNano(), endTime.UnixNano())
155 res, err := c.Service.Users.DataSources.Datasets.Get(userID, dataSourceID, datasetID).Context(ctx).Do()
157 log.Errorf(ctx, "c.Service.Users.DataSources.Datasets.Get(%q, %q) = %v",
158 dataSourceID, datasetID, err)
159 return 0, time.Time{}, err
162 if len(res.Point) == 0 {
163 return 0, startTime, nil
167 maxEndTime := startTime
168 for _, p := range res.Point {
169 pointEndTime := time.Unix(0, p.EndTimeNanos).In(startTime.Location())
170 value := p.Value[0].IntVal
173 if maxEndTime.Before(pointEndTime) {
174 maxEndTime = pointEndTime
178 log.Debugf(ctx, "Google Fit has data points until %v: %d steps", maxEndTime, steps)
179 return steps, maxEndTime, nil
182 func (c *Client) SetSteps(ctx context.Context, totalSteps int, startOfDay time.Time) error {
187 dataSourceID, err := c.DataSourceCreate(ctx, &fitness.DataSource{
188 Application: Application(ctx),
189 DataStreamName: "", // "daily summary"?
190 DataType: &fitness.DataType{
191 Field: []*fitness.DataTypeField{
192 &fitness.DataTypeField{
197 Name: dataTypeNameSteps,
207 endOfDay := startOfDay.Add(24 * time.Hour).Add(-1 * time.Nanosecond)
208 prevSteps, startTime, err := c.Steps(ctx, startOfDay, endOfDay)
209 if totalSteps == prevSteps {
212 diffSteps := totalSteps - prevSteps
214 log.Warningf(ctx, "c.Steps returned %d steps, but current count is %d", prevSteps, totalSteps)
215 diffSteps = totalSteps
218 if now := time.Now().In(startOfDay.Location()); now.Before(endOfDay) {
221 log.Debugf(ctx, "new data point: %v-%v %d steps", startTime, endTime, diffSteps)
223 return c.DataSetPatch(ctx, dataSourceID, []*fitness.DataPoint{
225 ComputationTimeMillis: time.Now().UnixNano() / 1000000,
226 DataTypeName: dataTypeNameSteps,
227 StartTimeNanos: startTime.UnixNano(),
228 EndTimeNanos: endTime.UnixNano(),
229 Value: []*fitness.Value{
231 IntVal: int64(diffSteps),