Fix base path and restore wasm engine

next.config.ts

@@ -1,7 +1,11 @@
 import type { NextConfig } from "next";
 
+const basePath = process.env.NEXT_PUBLIC_BASE_PATH || "";
+
 const nextConfig: NextConfig = {
   output: "export",
+  basePath,
+  assetPrefix: basePath || undefined,
 };
 
 export default nextConfig;

src/lib/engine/index.ts

@@ -1,31 +1,23 @@
 import type { Engine } from "./types";
 import { WASMEngine } from "./wasm";
+import { checkWASMSupport as checkSQLiteWASMSupport } from "./wasm";
 import { KVEngine } from "./kv";
 
 let wasmSupported: boolean | null = null;
+const wasmDisabled = process.env.NEXT_PUBLIC_USE_WASM === "0";
 
 async function checkWASMSupport(): Promise<boolean> {
   if (wasmSupported !== null) return wasmSupported;
 
-  try {
-    if (typeof WebAssembly === "undefined") {
-      wasmSupported = false;
-      return false;
-    }
-
-    await WebAssembly.instantiate(Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00));
-
-    await import("@sqlite.org/sqlite-wasm");
-
-    wasmSupported = true;
-    return true;
-  } catch {
-    wasmSupported = false;
-    return false;
-  }
+  wasmSupported = await checkSQLiteWASMSupport();
+  return wasmSupported;
 }
 
 export async function createEngine(group: string): Promise<Engine> {
+  if (wasmDisabled) {
+    return new KVEngine(group);
+  }
+
   const supported = await checkWASMSupport();
   if (supported) {
     return new WASMEngine();

src/lib/engine/kv.ts

@@ -1,6 +1,6 @@
 import type { Engine } from "./types";
 import type { OS } from "@/lib/types";
-import { addBasePath, dataBaseURL } from "@/lib/env";
+import { dataBaseURL } from "@/lib/env";
 import { fetchText, fetchLines } from "@/lib/client";
 
 interface KVRecord {
@@ -55,14 +55,14 @@ export class KVEngine implements Engine {
   }
 
   async listOS(): Promise<OS[]> {
-    const list = await fetchText(addBasePath(`${this.#baseURL}/list.json`));
+    const list = await fetchText(`${this.#baseURL}/list.json`);
     return JSON.parse(list);
   }
 
   async getPaths(build: string): Promise<string[]> {
     const os = await this.findOS(build);
     const tag = `${os.version}_${build}`;
-    return fetchLines(addBasePath(`${this.#baseURL}/${tag}/paths.txt`));
+    return fetchLines(`${this.#baseURL}/${tag}/paths.txt`);
   }
 
   async getBinaryXML(build: string, path: string): Promise<string> {

src/lib/engine/wasm.ts

@@ -2,40 +2,80 @@ import type { Engine } from "./types";
 import type { OS } from "@/lib/types";
 import { dataBaseURL } from "@/lib/env";
 
+type SQLite3Database = {
+  exec: (options: {
+    sql: string;
+    bind?: unknown[];
+    rowMode: "array";
+    returnValue: "resultRows";
+  }) => unknown[][];
+  close: () => void;
+};
+
 type SQLite3API = {
-  Database: new (data: ArrayLike<number | bigint>) => {
-    exec: (
-      sql: string,
-      bind?: unknown[]
-    ) => {
-      columns: string[];
-      rows: unknown[][];
-    }[];
-    close: () => void;
+  oo1: {
+    DB: new (filename?: string, flags?: string, vfs?: string) => SQLite3Database;
+  };
+  capi: {
+    sqlite3_js_posix_create_file: (
+      filename: string,
+      data: Uint8Array | ArrayBuffer,
+      dataLen?: number
+    ) => void;
   };
 };
 
 let sqlite3Module: SQLite3API | null = null;
-let dbInstance: InstanceType<SQLite3API["Database"]> | null = null;
+let dbInstance: SQLite3Database | null = null;
 let dbReady = false;
 
 async function loadSQLite(): Promise<SQLite3API> {
   if (sqlite3Module) return sqlite3Module;
 
   const sqliteModule = await import("@sqlite.org/sqlite-wasm");
-  sqlite3Module = (sqliteModule.default || sqliteModule) as unknown as SQLite3API;
+  const initSQLite = sqliteModule.default;
+  sqlite3Module = (await initSQLite()) as unknown as SQLite3API;
   return sqlite3Module;
 }
 
-async function getDB(): Promise<InstanceType<SQLite3API["Database"]>> {
+export async function checkWASMSupport(): Promise<boolean> {
+  try {
+    if (typeof WebAssembly === "undefined") {
+      return false;
+    }
+
+    await WebAssembly.instantiate(
+      Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00)
+    );
+    await loadSQLite();
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function getDB(): Promise<SQLite3Database> {
   if (dbReady && dbInstance) return dbInstance;
 
   const sqlite3 = await loadSQLite();
 
   const response = await fetch(`${dataBaseURL()}/ent.db`);
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch SQLite database: ${response.status} ${response.statusText}`
+    );
+  }
   const buffer = await response.arrayBuffer();
+  const bytes = new Uint8Array(buffer);
+  const filename = "/ent.db";
 
-  dbInstance = new sqlite3.Database(new Uint8Array(buffer));
+  try {
+    sqlite3.capi.sqlite3_js_posix_create_file(filename, bytes, bytes.byteLength);
+  } catch {
+    // Ignore duplicate file creation in hot-reload or repeated initialization cases.
+  }
+
+  dbInstance = new sqlite3.oo1.DB(filename, "r");
   dbReady = true;
   return dbInstance;
 }
@@ -43,64 +83,64 @@ async function getDB(): Promise<InstanceType<SQLite3API["Database"]>> {
 export class WASMEngine implements Engine {
   async listOS(): Promise<OS[]> {
     const db = await getDB();
-    const results = db.exec(
-      "SELECT name, version, build, devices FROM os ORDER BY version DESC"
-    );
-    if (!results.length) return [];
+    const rows = db.exec({
+      sql: "SELECT name, version, build, devices FROM os ORDER BY version DESC",
+      rowMode: "array",
+      returnValue: "resultRows",
+    });
 
-    const cols = results[0].columns;
-    const nameIdx = cols.indexOf("name");
-    const versionIdx = cols.indexOf("version");
-    const buildIdx = cols.indexOf("build");
-    const devicesIdx = cols.indexOf("devices");
-
-    return results[0].rows.map((row) => ({
-      name: row[nameIdx] as string,
-      version: row[versionIdx] as string,
-      build: row[buildIdx] as string,
-      devices: JSON.parse(row[devicesIdx] as string),
+    return rows.map((row) => ({
+      name: row[0] as string,
+      version: row[1] as string,
+      build: row[2] as string,
+      devices: JSON.parse(row[3] as string),
     }));
   }
 
   async getPaths(build: string): Promise<string[]> {
     const db = await getDB();
-    const results = db.exec(
-      `SELECT path FROM bin JOIN os ON bin.osid=os.id WHERE os.build=?`,
-      [build]
-    );
-    if (!results.length) return [];
-    return results[0].rows.map((row) => row[0] as string);
+    const rows = db.exec({
+      sql: `SELECT path FROM bin JOIN os ON bin.osid=os.id WHERE os.build=?`,
+      bind: [build],
+      rowMode: "array",
+      returnValue: "resultRows",
+    });
+    return rows.map((row) => row[0] as string);
   }
 
   async getBinaryXML(build: string, path: string): Promise<string> {
     const db = await getDB();
-    const results = db.exec(
-      `SELECT xml FROM bin JOIN os ON bin.osid=os.id WHERE os.build=? AND bin.path=?`,
-      [build, path]
-    );
-    if (!results.length || !results[0].rows.length) {
+    const rows = db.exec({
+      sql: `SELECT xml FROM bin JOIN os ON bin.osid=os.id WHERE os.build=? AND bin.path=?`,
+      bind: [build, path],
+      rowMode: "array",
+      returnValue: "resultRows",
+    });
+    if (!rows.length) {
       throw new Error(`Binary not found: ${path}`);
     }
-    return results[0].rows[0][0] as string;
+    return rows[0][0] as string;
   }
 
   async getKeys(build: string): Promise<string[]> {
     const db = await getDB();
-    const results = db.exec(
-      `SELECT DISTINCT key FROM pair JOIN bin ON pair.binid=bin.id JOIN os ON bin.osid=os.id WHERE os.build=?`,
-      [build]
-    );
-    if (!results.length) return [];
-    return results[0].rows.map((row) => row[0] as string);
+    const rows = db.exec({
+      sql: `SELECT DISTINCT key FROM pair JOIN bin ON pair.binid=bin.id JOIN os ON bin.osid=os.id WHERE os.build=?`,
+      bind: [build],
+      rowMode: "array",
+      returnValue: "resultRows",
+    });
+    return rows.map((row) => row[0] as string);
   }
 
   async getPathsForKey(build: string, key: string): Promise<string[]> {
     const db = await getDB();
-    const results = db.exec(
-      `SELECT path FROM bin JOIN pair ON bin.id=pair.binid JOIN os ON bin.osid=os.id WHERE os.build=? AND pair.key=?`,
-      [build, key]
-    );
-    if (!results.length) return [];
-    return results[0].rows.map((row) => row[0] as string);
+    const rows = db.exec({
+      sql: `SELECT path FROM bin JOIN pair ON bin.id=pair.binid JOIN os ON bin.osid=os.id WHERE os.build=? AND pair.key=?`,
+      bind: [build, key],
+      rowMode: "array",
+      returnValue: "resultRows",
+    });
+    return rows.map((row) => row[0] as string);
   }
 }