mirror of
https://github.com/ksyasuda/SubMiner.git
synced 2026-09-22 17:16:19 -07:00
sudacode
d9fdc7ef6d
- Add backend selection, setup gating, Anki integration, and external host support - Add launcher flags, documentation, packaging, and focused tests - Open on-demand overlay modals on the first attempt
63 lines
2.1 KiB
JavaScript
63 lines
2.1 KiB
JavaScript
/*
|
|
* Verifies the synchronous OPFS primitives required by WasmFS before the
|
|
* offscreen document commits to the pthread runtime.
|
|
*
|
|
* SPDX-License-Identifier: GPL-3.0-or-later
|
|
*/
|
|
|
|
function describe(error) {
|
|
return error instanceof Error ? error.message || String(error) : String(error);
|
|
}
|
|
|
|
// A dedicated worker receives only from its creator over its implicit
|
|
// MessagePort. MessageEvent.origin is always empty, so there is no origin value
|
|
// to validate; the channel check below validates the expected protocol.
|
|
globalThis.onmessage = async (event) => { // NOSONAR
|
|
if (event.data?.channel !== "opfs-capability-probe") return;
|
|
|
|
const suffix = `${Date.now()}-${globalThis.crypto.randomUUID()}`;
|
|
const first = `.hdw-opfs-probe-${suffix}`;
|
|
const second = `${first}-moved`;
|
|
let root = null;
|
|
let access = null;
|
|
try {
|
|
root = await navigator.storage.getDirectory();
|
|
const handle = await root.getFileHandle(first, { create: true });
|
|
if (typeof handle.createSyncAccessHandle !== "function" || typeof handle.move !== "function") {
|
|
throw new Error("OPFS synchronous access or file move is unavailable");
|
|
}
|
|
access = await handle.createSyncAccessHandle();
|
|
access.write(new Uint8Array([0x48, 0x44, 0x57]), { at: 0 });
|
|
access.flush();
|
|
access.close();
|
|
access = null;
|
|
|
|
await handle.move(root, second);
|
|
const moved = await root.getFileHandle(second);
|
|
access = await moved.createSyncAccessHandle();
|
|
if (access.getSize() !== 3) {
|
|
throw new Error("an OPFS file did not survive move intact");
|
|
}
|
|
access.close();
|
|
access = null;
|
|
await root.removeEntry(second);
|
|
globalThis.postMessage({ channel: "opfs-capability-result", ok: true });
|
|
} catch (error) {
|
|
try {
|
|
access?.close();
|
|
} catch {
|
|
// The failed operation may already have closed it.
|
|
}
|
|
if (root !== null) {
|
|
for (const name of [first, second]) {
|
|
try {
|
|
await root.removeEntry(name);
|
|
} catch {
|
|
// A probe path that was never created or already moved is absent.
|
|
}
|
|
}
|
|
}
|
|
globalThis.postMessage({ channel: "opfs-capability-result", ok: false, error: describe(error) });
|
|
}
|
|
};
|