59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package db
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import (
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"database/sql"
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"fmt"
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"strconv"
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"github.com/pkg/errors"
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"github.com/rs/zerolog"
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_ "modernc.org/sqlite"
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)
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// Returns a database connection handle for the DB
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func ConnectToDatabase(
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dbName string,
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logger *zerolog.Logger,
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) (*SafeConn, error) {
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file := fmt.Sprintf("file:%s.db", dbName)
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db, err := sql.Open("sqlite", file)
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if err != nil {
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return nil, errors.Wrap(err, "sql.Open")
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}
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version, err := strconv.Atoi(dbName)
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if err != nil {
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return nil, errors.Wrap(err, "strconv.Atoi")
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}
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err = checkDBVersion(db, version)
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if err != nil {
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return nil, errors.Wrap(err, "checkDBVersion")
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}
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conn := MakeSafe(db, logger)
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return conn, nil
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}
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// Check the database version
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func checkDBVersion(db *sql.DB, expectVer int) error {
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query := `SELECT version_id FROM goose_db_version WHERE is_applied = 1
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ORDER BY version_id DESC LIMIT 1`
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rows, err := db.Query(query)
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if err != nil {
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return errors.Wrap(err, "checkDBVersion")
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}
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defer rows.Close()
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if rows.Next() {
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var version int
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err = rows.Scan(&version)
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if err != nil {
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return errors.Wrap(err, "rows.Scan")
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}
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if version != expectVer {
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return errors.New("Version mismatch")
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}
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} else {
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return errors.New("No version found")
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}
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return nil
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}
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