update to support postgresql and add godocs

db/local.go

@@ -4,6 +4,7 @@ import (
 	"database/sql"
 	"fmt"
 	"log/slog"
+	"strings"
 	"vctp/db/queries"
 
 	//_ "github.com/tursodatabase/libsql-client-go/libsql"
@@ -28,7 +29,7 @@ func (d *LocalDB) DB() *sqlx.DB {
 	return d.db
 }
 
-func (d *LocalDB) Queries() *queries.Queries {
+func (d *LocalDB) Queries() Querier {
 	return d.queries
 }
 
@@ -42,7 +43,7 @@ func (d *LocalDB) Close() error {
 	return d.db.Close()
 }
 
-func newLocalDB(logger *slog.Logger, path string) (*LocalDB, error) {
+func newLocalDB(logger *slog.Logger, dsn string) (*LocalDB, error) {
 
 	// TODO - work out if https://kerkour.com/sqlite-for-servers is possible without using sqlx
 	/*
@@ -62,8 +63,9 @@ func newLocalDB(logger *slog.Logger, path string) (*LocalDB, error) {
 		readDB.SetMaxOpenConns(max(4, runtime.NumCPU()))
 	*/
 
-	//db, err := sql.Open("libsql", "file:"+path)
-	db, err := sqlx.Open("sqlite", "file:"+path)
+	normalizedDSN := normalizeSqliteDSN(dsn)
+	//db, err := sql.Open("libsql", normalizedDSN)
+	db, err := sqlx.Open("sqlite", normalizedDSN)
 	if err != nil {
 		logger.Error("can't open database connection", "error", err)
 		return nil, err
@@ -92,3 +94,15 @@ func newLocalDB(logger *slog.Logger, path string) (*LocalDB, error) {
 
 	return &LocalDB{logger: logger, db: db, queries: queries.New(db)}, nil
 }
+
+func normalizeSqliteDSN(dsn string) string {
+	trimmed := strings.TrimSpace(dsn)
+	if trimmed == "" {
+		return "file:db.sqlite3"
+	}
+	lower := strings.ToLower(trimmed)
+	if strings.HasPrefix(lower, "file:") || strings.HasPrefix(lower, "file::memory:") || trimmed == ":memory:" {
+		return trimmed
+	}
+	return "file:" + trimmed
+}