@evolu/web/dist/WasmSqliteDriver.js

Evolu for web

import { constVoid, createPreparedStatementsCache, } from "@evolu/common";
import sqlite3InitModule from "@sqlite.org/sqlite-wasm";
// TODO: Do we still need that?
// https://github.com/sqlite/sqlite-wasm/issues/62
// @ts-expect-error Missing types.
globalThis.sqlite3ApiConfig = {
    warn: constVoid,
};
// Init ASAP.
const sqlite3Promise = sqlite3InitModule();
export const createWasmSqliteDriver = async (name) => {
    const sqlite3 = await sqlite3Promise;
    const poolUtil = await sqlite3.installOpfsSAHPoolVfs({ name });
    const db = new poolUtil.OpfsSAHPoolDb("/evolu1.db");
    let isDisposed = false;
    const cache = createPreparedStatementsCache((sql) => db.prepare(sql), (statement) => {
        statement.finalize();
    });
    const driver = {
        exec: (query, isMutation) => {
            const prepared = cache.get(query);
            if (prepared) {
                prepared.bind(query.parameters);
                if (isMutation) {
                    prepared.stepReset();
                    return {
                        rows: [],
                        changes: db.changes(),
                    };
                }
                const rows = [];
                while (prepared.step()) {
                    rows.push(prepared.get({}));
                }
                prepared.reset();
                return {
                    rows: rows,
                    changes: 0,
                };
            }
            const rows = db.exec(query.sql, {
                returnValue: "resultRows",
                rowMode: "object",
                bind: query.parameters,
            });
            const changes = db.changes();
            return { rows, changes };
        },
        export: () => sqlite3.capi.sqlite3_js_db_export(db),
        [Symbol.dispose]: () => {
            if (isDisposed)
                return;
            isDisposed = true;
            // poolUtil.unlink?
            cache[Symbol.dispose]();
            db.close();
        },
    };
    return driver;
};