Files
History_Api/internal/repositories/tileRepository.go
AzenKain 79199f627d
Some checks failed
Build and Release / release (push) Failing after 51s
init
2026-03-25 22:29:43 +07:00

99 lines
2.0 KiB
Go

package repositories
import (
"context"
"database/sql"
"fmt"
"history-api/pkg/cache"
"time"
)
type TileRepository interface {
GetMetadata(ctx context.Context) (map[string]string, error)
GetTile(ctx context.Context, z, x, y int) ([]byte, string, bool, error)
}
type tileRepository struct {
db *sql.DB
c cache.Cache
}
func NewTileRepository(db *sql.DB, c cache.Cache) TileRepository {
return &tileRepository{
db: db,
c: c,
}
}
func (r *tileRepository) GetMetadata(ctx context.Context) (map[string]string, error) {
cacheId := "mbtiles:metadata"
var cached map[string]string
err := r.c.Get(ctx, cacheId, &cached)
if err == nil {
return cached, nil
}
rows, err := r.db.QueryContext(ctx, "SELECT name, value FROM metadata")
if err != nil {
return nil, err
}
defer rows.Close()
metadata := make(map[string]string)
for rows.Next() {
var name, value string
if err := rows.Scan(&name, &value); err != nil {
return nil, err
}
metadata[name] = value
}
_ = r.c.Set(ctx, cacheId, metadata, 10*time.Minute)
return metadata, nil
}
func (r *tileRepository) GetTile(ctx context.Context, z, x, y int) ([]byte, string, bool, error) {
if z < 0 || x < 0 || y < 0 {
return nil, "", false, fmt.Errorf("invalid tile coordinates")
}
// cache key
cacheId := fmt.Sprintf("tile:%d:%d:%d", z, x, y)
var cached []byte
err := r.c.Get(ctx, cacheId, &cached)
if err == nil {
meta, _ := r.GetMetadata(ctx)
return cached, meta["format"], meta["format"] == "pbf", nil
}
// XYZ -> TMS
tmsY := (1 << z) - 1 - y
var tileData []byte
err = r.db.QueryRowContext(ctx, `
SELECT tile_data
FROM tiles
WHERE zoom_level = ?
AND tile_column = ?
AND tile_row = ?
`, z, x, tmsY).Scan(&tileData)
if err != nil {
return nil, "", false, err
}
meta, err := r.GetMetadata(ctx)
if err != nil {
return nil, "", false, err
}
_ = r.c.Set(ctx, cacheId, tileData, 5*time.Minute)
return tileData, meta["format"], meta["format"] == "pbf", nil
}