forked from MTSR/mapserver
134 lines
2.3 KiB
Go
134 lines
2.3 KiB
Go
package postgres
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import (
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"database/sql"
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_ "github.com/lib/pq"
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"mapserver/coords"
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"mapserver/db"
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)
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type PostgresAccessor struct {
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db *sql.DB
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}
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func (db *PostgresAccessor) Migrate() error {
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return nil
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}
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func convertRows(pos int64, data []byte, mtime int64) db.Block {
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c := coords.PlainToCoord(pos)
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return db.Block{Pos: c, Data: data, Mtime: mtime}
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}
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func (this *PostgresAccessor) FindBlocksByMtime(gtmtime int64, limit int) ([]db.Block, error) {
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blocks := make([]db.Block, 0)
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rows, err := this.db.Query(getBlocksByMtimeQuery, gtmtime, limit)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var pos int64
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var data []byte
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var mtime int64
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err = rows.Scan(&pos, &data, &mtime)
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if err != nil {
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return nil, err
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}
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mb := convertRows(pos, data, mtime)
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blocks = append(blocks, mb)
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}
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return blocks, nil
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}
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func (this *PostgresAccessor) FindLegacyBlocksByPos(lastpos coords.MapBlockCoords, limit int) ([]db.Block, error) {
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blocks := make([]db.Block, 0)
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pc := coords.CoordToPlain(lastpos)
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rows, err := this.db.Query(getLastBlockQuery, pc, limit)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var pos int64
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var data []byte
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var mtime int64
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err = rows.Scan(&pos, &data, &mtime)
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if err != nil {
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return nil, err
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}
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mb := convertRows(pos, data, mtime)
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blocks = append(blocks, mb)
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}
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return blocks, nil
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}
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func (this *PostgresAccessor) CountBlocks(frommtime, tomtime int64) (int, error) {
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rows, err := this.db.Query(countBlocksQuery, frommtime, tomtime)
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if err != nil {
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return 0, err
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}
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defer rows.Close()
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if rows.Next() {
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var count int64
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err = rows.Scan(&count)
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if err != nil {
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return 0, err
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}
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return int(count), nil
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}
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return 0, nil
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}
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func (this *PostgresAccessor) GetBlock(pos coords.MapBlockCoords) (*db.Block, error) {
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ppos := coords.CoordToPlain(pos)
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rows, err := this.db.Query(getBlockQuery, ppos)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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if rows.Next() {
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var pos int64
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var data []byte
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var mtime int64
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err = rows.Scan(&pos, &data, &mtime)
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if err != nil {
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return nil, err
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}
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mb := convertRows(pos, data, mtime)
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return &mb, nil
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}
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return nil, nil
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}
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func NewPostgresAccessor(filename string) (*PostgresAccessor, error) {
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return nil, nil
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}
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