Prepare for DB migartions

packages/backend/src/database.ts

@@ -1,5 +1,6 @@
 import { Database as BunSqliteDatabase } from "bun:sqlite";
 import { AttachmentId, PieceId, RepertoireId, RequestId, SessionId, Sha256_Bin, UserId } from "common";
+import { HashSet } from "effect";
 import { ColumnType, CompiledQuery, CreateTableBuilder, Kysely, Selectable } from "kysely";
 import { BunSqliteDialect } from "kysely-bun-sqlite";
 
@@ -15,9 +16,11 @@ export interface Database {
 	Attachment: AttachmentTable;
 	File: FileTable;
 	Piece: PieceTable;
+	Option: OptionTable;
 	Repertoire: RepertoireTable;
 	RepertoireEntry: RepertoireEntryTable;
 	Session: SessionTable;
+	sqlite_schema: SqliteSchemaTable;
 }
 
 export interface SystemInformation {
@@ -52,6 +55,11 @@ export interface FileTable {
 	data: ColumnType<Uint8Array, Uint8Array, never>;
 }
 
+export interface OptionTable {
+	key: ColumnType<string, string, never>;
+	value: string;
+}
+
 export interface PieceData {
 	name: string;
 	composer: string | null;
@@ -91,13 +99,23 @@ export interface SessionTable extends SessionData {
 	expiresAt: string;
 }
 
+export interface SqliteSchemaTable {
+	type: ColumnType<string, never, never>;
+	name: ColumnType<string, never, never>;
+	tbl_name: ColumnType<string, never, never>;
+	rootpage: ColumnType<number, never, never>;
+	sql: ColumnType<string | null, never, never>;
+}
+
 export type AccessLog = Selectable<AccessLogTable>;
 export type Attachment = Selectable<AttachmentTable>;
 export type File = Selectable<FileTable>;
+export type Option = Selectable<OptionTable>;
 export type Piece = Selectable<PieceTable>;
 export type Repertoire = Selectable<RepertoireTable>;
 export type RepertoireEntry = Selectable<RepertoireEntryTable>;
 export type Session = Selectable<SessionTable>;
+export type SqliteSchema = Selectable<SqliteSchemaTable>;
 
 function systemInformation<TB extends string, C extends string>(schema: CreateTableBuilder<TB, C>) {
 	return schema
@@ -115,6 +133,14 @@ export async function initDatabase(filename: string = "db.sqlite3"): Promise<Kys
 
 	await db.executeQuery(CompiledQuery.raw("PRAGMA foreign_keys = ON"));
 
+	const tables = await db
+		.selectFrom("sqlite_schema")
+		.select("name")
+		.where("type", "=", "table")
+		.execute()
+		.then((tables) => HashSet.make(...tables.map(({ name }) => name)));
+
+	if (!HashSet.has(tables, "Option")) {
 		await db.schema
 			.createTable("AccessLog")
 			.ifNotExists()
@@ -222,5 +248,18 @@ export async function initDatabase(filename: string = "db.sqlite3"): Promise<Kys
 			.columns(["pieceId", "filename"])
 			.execute();
 
+		await db.schema
+			.createTable("Option")
+			.ifNotExists()
+			.addColumn("key", "text", (c) => c.notNull().primaryKey())
+			.addColumn("value", "text", (c) => c.notNull())
+			.execute();
+
+		await db
+			.insertInto("Option")
+			.values({ key: "database_version", value: "0" })
+			.execute();
+	}
+
 	return db;
 }