chore: add sqlite init and config, add repository for sql

backend/internal/storage/sqlite.go

@@ -0,0 +1,33 @@
+package storage
+
+import (
+	"database/sql"
+	"fmt"
+	_ "modernc.org/sqlite"
+	"strings"
+)
+
+var pragmas = map[string]string{
+	`journal_mode`: `wal`,
+	`synchronous`:  `normal`,
+	`busy_timeout`: `30000`,
+}
+
+func buildSqliteDsn(path string, pragmas map[string]string) string {
+	pragmastrs := make([]string, len(pragmas))
+	i := 0
+	for k, v := range pragmas {
+		pragmastrs[i] = (fmt.Sprintf(`pragma=%s(%s)`, k, v))
+		i++
+	}
+	return path + "?" + "mode=rwc&" + strings.Join(pragmastrs, "&")
+}
+
+func Open(path string) (*sql.DB, error) {
+	dsn := buildSqliteDsn(path, pragmas)
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return nil, err
+	}
+	return db, nil
+}