Files
web-dslr/ui/ops.js
2021-07-26 13:09:10 +00:00

43 lines
1006 B
JavaScript

import initModule from '../libapi.mjs';
/** @typedef {import('../libapi.mjs').Context} Context */
const ModulePromise = initModule();
export async function connect() {
const Module = await ModulePromise;
let context = await new Module.Context();
let supportedOps = await context.supportedOps();
let queue = Promise.resolve();
/** Schedules an exclusive async operation on the global context.
* @template T
* @param {(ctx: Context) => Promise<T>} op
* @returns {Promise<T>}
*/
function schedule(op) {
let res = queue.then(() => op(context));
// Queue should ignore result values as well as errors from singular ops.
queue = res.then(
() => {},
() => {}
);
// Result should contain the unwrapped value or error.
return res;
}
return {
supportedOps,
schedule,
disconnect() {
context.delete();
}
};
}
/** @typedef {ReturnType<typeof connect> extends Promise<infer Connection> ? Connection : never} Connection */