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package web
import (
"encoding/json"
"errors"
"fmt"
"log/slog"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"time"
"github.com/martinlehoux/biking_home/rides"
"github.com/martinlehoux/biking_home/strava"
"github.com/martinlehoux/kagamigo/kcore"
)
func (s *Server) handleSyncForm(w http.ResponseWriter, r *http.Request) {
data := SyncPageData{
From: queryOrDefault(r, "from", time.Now().AddDate(0, 0, -30).Format(dateFormat)),
To: queryOrDefault(r, "to", time.Now().Format(dateFormat)),
Notice: syncNotice(r),
HasAuth: s.hasStravaToken(),
}
if _, _, err := s.stravaClient(); err != nil {
data.Error = err.Error()
}
kcore.RenderPage(r.Context(), SyncPage(data), w)
}
func (s *Server) handleSync(w http.ResponseWriter, r *http.Request) {
if err := r.ParseMultipartForm(10 << 20); err != nil && !errors.Is(err, http.ErrNotMultipart) {
http.Error(w, "invalid form", http.StatusBadRequest)
return
}
from, to, err := parseDateRange(r.FormValue("from"), r.FormValue("to"))
if err != nil {
s.renderSyncError(w, r, r.FormValue("from"), r.FormValue("to"), err)
return
}
appConfig, err := s.loadConfig()
if err != nil {
s.renderSyncError(w, r, r.FormValue("from"), r.FormValue("to"), err)
return
}
client, authorized, err := newStravaClient(appConfig)
if err != nil {
s.renderSyncError(w, r, r.FormValue("from"), r.FormValue("to"), err)
return
}
if !authorized {
query := url.Values{}
query.Set("return_to", "/sync?from="+r.FormValue("from")+"&to="+r.FormValue("to"))
http.Redirect(w, r, "/strava/login?"+query.Encode(), http.StatusFound)
return
}
if !s.beginSync() {
http.Error(w, "a Strava sync is already in progress", http.StatusConflict)
return
}
defer s.endSync()
if refreshed, err := client.RefreshIfNeeded(); err != nil {
s.renderSyncError(w, r, r.FormValue("from"), r.FormValue("to"), err)
return
} else if refreshed {
if err := s.saveStravaToken(client); err != nil {
s.renderSyncError(w, r, r.FormValue("from"), r.FormValue("to"), err)
return
}
}
flusher, ok := w.(http.Flusher)
if !ok {
http.Error(w, "streaming responses are not supported", http.StatusInternalServerError)
return
}
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Content-Type", "text/event-stream")
progress, err := s.syncRides(client, appConfig.Storage.GPXDir, from, to, func(progress SyncProgress) error {
return writeSyncEvent(w, flusher, "progress", progress)
})
if err != nil {
_ = writeSyncEvent(w, flusher, "error", syncErrorEvent{Message: err.Error(), Progress: progress})
return
}
slog.Info("Completed Strava sync", "from", from.Format(dateFormat), "to", to.Add(-24*time.Hour).Format(dateFormat), "total", progress.Total, "imported", progress.Imported, "skipped", progress.Skipped)
_ = writeSyncEvent(w, flusher, "complete", progress)
}
func (s *Server) syncRides(client syncClient, gpxDir string, from, to time.Time, report func(SyncProgress) error) (SyncProgress, error) {
activities, err := client.List(from, to)
if err != nil {
return SyncProgress{}, err
}
progress := SyncProgress{Total: len(activities)}
if err := reportSyncProgress(report, progress); err != nil {
return progress, err
}
slog.Info("Started Strava sync", "from", from.Format(dateFormat), "to", to.Add(-24*time.Hour).Format(dateFormat), "total", progress.Total)
if err := os.MkdirAll(gpxDir, 0o755); err != nil {
return progress, fmt.Errorf("create GPX directory: %w", err)
}
for _, summary := range activities {
externalID := fmt.Sprintf("strava:%d", summary.ID)
_, exists, err := rides.GetByExternalID(s.db, externalID)
if err != nil {
return progress, err
}
if exists {
progress.Skipped++
progress.Completed++
if err := reportSyncProgress(report, progress); err != nil {
return progress, err
}
continue
}
activity, gpxData, err := client.Get(summary.ID)
if err != nil {
if errors.Is(err, strava.ErrNoTrackPoints) {
_ = os.Remove(filepath.Join(gpxDir, fmt.Sprintf("activity_%d.gpx", summary.ID)))
if saveErr := rides.Save(s.db, rideFromActivity(externalID, "", activity)); saveErr != nil {
if reportErr := skipSyncActivity(&progress, report, summary, fmt.Errorf("save metadata: %w", saveErr)); reportErr != nil {
return progress, reportErr
}
continue
}
progress.Imported++
progress.Completed++
if reportErr := reportSyncProgress(report, progress); reportErr != nil {
return progress, reportErr
}
slog.Info("Imported Strava activity without route", "activity", activity.ID, "name", activity.Name)
continue
}
if err := skipSyncActivity(&progress, report, summary, err); err != nil {
return progress, err
}
continue
}
gpxPath := filepath.Join(gpxDir, fmt.Sprintf("activity_%d.gpx", activity.ID))
if err := os.WriteFile(gpxPath, gpxData, 0o644); err != nil {
_ = os.Remove(gpxPath)
if reportErr := skipSyncActivity(&progress, report, summary, fmt.Errorf("write GPX: %w", err)); reportErr != nil {
return progress, reportErr
}
continue
}
if err := rides.Save(s.db, rideFromActivity(externalID, gpxPath, activity)); err != nil {
_ = os.Remove(gpxPath)
if reportErr := skipSyncActivity(&progress, report, summary, fmt.Errorf("save activity: %w", err)); reportErr != nil {
return progress, reportErr
}
continue
}
progress.Imported++
progress.Completed++
if err := reportSyncProgress(report, progress); err != nil {
return progress, err
}
slog.Info("Imported Strava ride", "activity", activity.ID, "name", activity.Name)
}
return progress, nil
}
func rideFromActivity(externalID, gpxPath string, activity strava.Activity) rides.Ride {
activityType := activity.SportType
if activityType == "" {
activityType = activity.Type
}
return rides.Ride{
ExternalID: externalID,
GPXPath: gpxPath,
Name: activity.Name,
Type: activityType,
StartDate: activity.StartDate,
DistanceM: activity.DistanceM,
ExternalMovingTimeS: activity.MovingTimeS,
ElapsedTimeS: activity.ElapsedTimeS,
TotalElevationGainM: activity.TotalElevationGainM,
AverageSpeedMps: activity.AverageSpeedMps,
}
}
func skipSyncActivity(progress *SyncProgress, report func(SyncProgress) error, activity strava.Activity, err error) error {
progress.Skipped++
progress.Completed++
slog.Warn("Skipped Strava activity", "activity", activity.ID, "name", activity.Name, "error", err)
return reportSyncProgress(report, *progress)
}
func reportSyncProgress(report func(SyncProgress) error, progress SyncProgress) error {
if report == nil {
return nil
}
return report(progress)
}
func (s *Server) beginSync() bool {
s.syncMu.Lock()
defer s.syncMu.Unlock()
if s.syncActive {
return false
}
s.syncActive = true
return true
}
func (s *Server) endSync() {
s.syncMu.Lock()
s.syncActive = false
s.syncMu.Unlock()
}
type syncErrorEvent struct {
Message string `json:"message"`
Progress SyncProgress `json:"progress"`
}
func writeSyncEvent(w http.ResponseWriter, flusher http.Flusher, event string, data any) error {
payload, err := json.Marshal(data)
if err != nil {
return err
}
if _, err := fmt.Fprintf(w, "event: %s\ndata: %s\n\n", event, payload); err != nil {
return err
}
flusher.Flush()
return nil
}
func (s *Server) renderSyncError(w http.ResponseWriter, r *http.Request, from, to string, err error) {
if strings.Contains(r.Header.Get("Accept"), "text/event-stream") {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
w.WriteHeader(http.StatusBadRequest)
kcore.RenderPage(r.Context(), SyncPage(SyncPageData{From: from, To: to, Error: err.Error(), HasAuth: s.hasStravaToken()}), w)
}
func parseDateRange(from, to string) (time.Time, time.Time, error) {
start, err := time.Parse(dateFormat, from)
if err != nil {
return time.Time{}, time.Time{}, errors.New("a valid start date is required")
}
end, err := time.Parse(dateFormat, to)
if err != nil {
return time.Time{}, time.Time{}, errors.New("a valid end date is required")
}
if end.Before(start) {
return time.Time{}, time.Time{}, errors.New("the end date must not be before the start date")
}
return start.UTC(), end.AddDate(0, 0, 1).UTC(), nil
}
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