97 lines
1.9 KiB
Go
97 lines
1.9 KiB
Go
package cmd
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import (
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"context"
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"fmt"
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"os"
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"golang.org/x/time/rate"
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"googlemaps.github.io/maps"
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)
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type Maps struct {
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around Location
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}
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func NewMapsOf(ctx context.Context, town string) (*Maps, error) {
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m := &Maps{}
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var err error
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m.around, err = m.textSearchOne(ctx, town)
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return m, err
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}
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var rps = 2
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var limit = 200
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var mapsLimiter = rate.NewLimiter(rate.Limit(rps), 1)
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type Location struct {
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Name string
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Lat float64
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Lng float64
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Address string
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}
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func (m *Maps) textSearchOne(ctx context.Context, query string) (Location, error) {
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results, err := m.textSearch(ctx, query)
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if err != nil {
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return Location{}, err
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} else if len(results) < 1 {
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return Location{}, fmt.Errorf("no results for %q", query)
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}
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return results[0], nil
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}
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func (m *Maps) textSearch(ctx context.Context, query string) ([]Location, error) {
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locations := []Location{}
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nextToken := ""
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for {
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results, err := m._textSearch(ctx, query, nextToken)
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if err != nil {
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return nil, err
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}
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for _, result := range results.Results {
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locations = append(locations, Location{
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Name: result.Name,
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Lat: result.Geometry.Location.Lat,
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Lng: result.Geometry.Location.Lng,
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Address: result.FormattedAddress,
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})
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}
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nextToken = results.NextPageToken
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if nextToken == "" {
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break
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}
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}
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return locations, ctx.Err()
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}
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func (m *Maps) _textSearch(ctx context.Context, query string, nextToken string) (maps.PlacesSearchResponse, error) {
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mapsLimiter.Wait(ctx)
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var location *maps.LatLng
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radius := uint(0)
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if m.around == (Location{}) {
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radius = 250
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} else {
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location = &maps.LatLng{
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Lat: m.around.Lat,
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Lng: m.around.Lng,
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}
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}
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return m.client().TextSearch(ctx, &maps.TextSearchRequest{
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Query: query,
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Location: location,
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Radius: radius,
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PageToken: nextToken,
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})
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}
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func (*Maps) client() *maps.Client {
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c, err := maps.NewClient(maps.WithAPIKey(os.Getenv("GOOGLE_PLACES_API_KEY")))
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if err != nil {
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panic(err)
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}
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return c
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}
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