65c2e3d932
* optimize meili trail index * several fixes --------- Co-authored-by: Flomp <Flomp@users.noreply.github.com>
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package util
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import (
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"bytes"
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"fmt"
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"io"
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"github.com/pocketbase/pocketbase/core"
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"github.com/tkrajina/gpxgo/gpx"
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"github.com/twpayne/go-polyline"
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)
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func ComputePolyline(app core.App, r *core.Record) (string, error) {
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gpxPath := r.GetString("gpx")
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if len(gpxPath) == 0 {
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return "", nil
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}
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fsys, err := app.NewFilesystem()
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if err != nil {
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return "", fmt.Errorf("open filesystem: %w", err)
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}
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defer fsys.Close()
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gpxFilePath := r.BaseFilesPath() + "/" + gpxPath
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gpxFile, err := fsys.GetReader(gpxFilePath)
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if err != nil {
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return "", fmt.Errorf("open gpx file %q: %w", gpxFilePath, err)
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}
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defer gpxFile.Close()
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content := new(bytes.Buffer)
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if _, err = io.Copy(content, gpxFile); err != nil {
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return "", fmt.Errorf("read gpx file %q: %w", gpxFilePath, err)
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}
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gpxData, err := gpx.Parse(content)
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if err != nil {
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return "", fmt.Errorf("parse gpx file %q: %w", gpxFilePath, err)
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}
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gpxData.SimplifyTracks(50)
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coordinates := make([][]float64, 0)
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for _, trk := range gpxData.Tracks {
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for _, seg := range trk.Segments {
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for _, pt := range seg.Points {
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coordinates = append(coordinates, []float64{pt.Latitude, pt.Longitude})
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}
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}
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}
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return string(polyline.EncodeCoords(coordinates)), nil
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}
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func SavePolyline(app core.App, r *core.Record) error {
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encoded, err := ComputePolyline(app, r)
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if err != nil {
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return err
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}
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r.Set("polyline", encoded)
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if err := app.UnsafeWithoutHooks().Save(r); err != nil {
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return fmt.Errorf("save trail polyline: %w", err)
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}
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return nil
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}
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