72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
package db
|
|
|
|
import (
|
|
scn "blackforestbytes.com/simplecloudnotifier"
|
|
"context"
|
|
"database/sql"
|
|
_ "embed"
|
|
"errors"
|
|
"fmt"
|
|
_ "github.com/mattn/go-sqlite3"
|
|
)
|
|
|
|
//go:embed schema_1.0.sql
|
|
var schema_1_0 string
|
|
|
|
//go:embed schema_2.0.sql
|
|
var schema_2_0 string
|
|
|
|
func NewDatabase(ctx context.Context, conf scn.Config) (*sql.DB, error) {
|
|
db, err := sql.Open("sqlite3", conf.DBFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
schema, err := getSchemaFromDB(ctx, db)
|
|
if schema == 0 {
|
|
|
|
_, err = db.ExecContext(ctx, schema_1_0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return db, nil
|
|
|
|
} else if schema == 1 {
|
|
return nil, errors.New("cannot autom. upgrade schema 1")
|
|
} else if schema == 2 {
|
|
return db, nil
|
|
} else {
|
|
return nil, errors.New(fmt.Sprintf("Unknown DB schema: %d", schema))
|
|
}
|
|
|
|
}
|
|
|
|
func getSchemaFromDB(ctx context.Context, db *sql.DB) (int, error) {
|
|
|
|
r1, err := db.QueryContext(ctx, "SELECT name FROM sqlite_master WHERE type='table' AND name='meta'")
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
if !r1.Next() {
|
|
return 0, nil
|
|
}
|
|
|
|
r2, err := db.QueryContext(ctx, "SELECT value_int FROM meta WHERE key='schema'")
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if !r2.Next() {
|
|
return 0, errors.New("no schema entry in meta table")
|
|
}
|
|
|
|
var schema int
|
|
err = r2.Scan(&schema)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return schema, nil
|
|
}
|