trilogy/es/sqljs-handler.js

TypeScript SQLite layer with support for both native C++ & pure JavaScript drivers.

import { dirname } from 'path';
import { readFileSync, writeFileSync } from 'fs';
import { createPool } from 'generic-pool';
import { makeDirPath } from './util';
export async function readDatabase(instance) {
    const name = instance.options.connection.filename;
    const init = await import('sql.js');
    const SQL = await init.default();
    if (name === ':memory:') {
        return new SQL.Database();
    }
    let client;
    try {
        makeDirPath(dirname(name));
        const file = readFileSync(name);
        client = new SQL.Database(file);
    }
    catch (e) {
        if (e.code === 'ENOENT') {
            client = new SQL.Database();
            writeDatabase(instance, client);
        }
        else {
            throw e;
        }
    }
    return client;
}
export function writeDatabase(instance, db) {
    const name = instance.options.connection.filename;
    if (name === ':memory:')
        return;
    makeDirPath(dirname(name));
    writeFileSync(name, db.export(), { mode: parseInt('0777', 8) });
}
export function pureConnect(instance) {
    return createPool({
        create() {
            return readDatabase(instance);
        },
        async destroy(client) {
            client.close();
        }
    }, { min: 1, max: 1 });
}