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Add proxy for managing tiles

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This commit is contained in:
Eli Ribble 2026-03-11 14:28:59 +00:00
parent d6407933f8
commit 3743d63692
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10 changed files with 316 additions and 198 deletions
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platform/imagetile/empty-tile.png Normal file
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54
platform/imagetile/imagetile.go
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@ -2,15 +2,36 @@ package imagetile
import (
"context"
"embed"
"errors"
"fmt"
"github.com/Gleipnir-Technology/arcgis-go"
"github.com/Gleipnir-Technology/arcgis-go/fieldseeker"
"github.com/Gleipnir-Technology/nidus-sync/background"
"github.com/Gleipnir-Technology/nidus-sync/db/models"
//"github.com/rs/zerolog/log"
"github.com/rs/zerolog/log"
)
//go:embed empty-tile.png
var emptyTileFS embed.FS
var ErrNoTile = errors.New("used placeholder tile")
var clientByOrgID = make(map[int32]*fieldseeker.FieldSeeker, 0)
func ImageAtPoint(ctx context.Context, org *models.Organization, level uint, lat, lng float64) ([]byte, error) {
fssync, err := getFieldseeker(ctx, org)
if err != nil {
return []byte{}, fmt.Errorf("create fssync: %w", err)
}
map_service, err := aerialImageService(ctx, fssync.Arcgis)
if err != nil {
return []byte{}, fmt.Errorf("no map service: %w", err)
}
return map_service.TileGPS(ctx, level, lat, lng)
}
func ImageAtTile(ctx context.Context, org *models.Organization, level, y, x uint) ([]byte, error) {
oauth, err := background.GetOAuthForOrg(ctx, org)
if err != nil {
return []byte{}, fmt.Errorf("get oauth for org: %w", err)
@ -26,7 +47,20 @@ func ImageAtPoint(ctx context.Context, org *models.Organization, level uint, lat
if err != nil {
return []byte{}, fmt.Errorf("no map service: %w", err)
}
return map_service.TileGPS(ctx, level, lat, lng)
data, e := map_service.Tile(ctx, level, y, x)
if e != nil {
log.Error().Err(e).Msg("error getting tile")
return []byte{}, fmt.Errorf("tile: %w", e)
}
// No data at this location, so supply the empty tile placeholder
if len(data) == 0 {
empty, err := emptyTileFS.ReadFile("empty-tile.png")
if err != nil {
return []byte{}, fmt.Errorf("read empty tile: %w", err)
}
return empty, ErrNoTile
}
return data, nil
}
func aerialImageService(ctx context.Context, gis *arcgis.ArcGIS) (*arcgis.MapService, error) {
@ -39,3 +73,19 @@ func aerialImageService(ctx context.Context, gis *arcgis.ArcGIS) (*arcgis.MapSer
}
return nil, fmt.Errorf("non found")
}
func getFieldseeker(ctx context.Context, org *models.Organization) (*fieldseeker.FieldSeeker, error) {
fssync, ok := clientByOrgID[org.ID]
if ok {
return fssync, nil
}
oauth, err := background.GetOAuthForOrg(ctx, org)
if err != nil {
return nil, fmt.Errorf("get oauth for org: %w", err)
}
fssync, err = background.NewFieldSeeker(
ctx,
oauth,
)
clientByOrgID[org.ID] = fssync
return fssync, nil
}