pybricks-code/src/sagas/mpy.ts

// SPDX-License-Identifier: MIT
// Copyright (c) 2020 The Pybricks Authors

import { CompileResult, compile as mpyCrossCompile } from '@pybricks/mpy-cross-v5';
import wasm from '@pybricks/mpy-cross-v5/build/mpy-cross.wasm';
import { call, put, takeEvery } from 'redux-saga/effects';
import {
    MpyActionType,
    MpyCompileAction,
    didCompile,
    didFailToCompile,
} from '../actions/mpy';

/**
 * Compiles a script to .mpy and dispatches either didCompile on success or
 * didFailToCompile on error.
 * @param action A mpy compile action.
 */
function* compile(action: MpyCompileAction): Generator {
    const result = (yield call(() =>
        mpyCrossCompile(
            'main.py',
            action.script,
            action.options,
            // HACK: testing user agent for jsdom is needed only for getting unit tests to work
            navigator.userAgent.includes('jsdom') ? undefined : wasm,
        ),
    )) as CompileResult;
    if (result.status === 0 && result.mpy) {
        yield put(didCompile(result.mpy));
    } else {
        yield put(didFailToCompile(result.err));
    }
}

export default function* (): Generator {
    yield takeEvery(MpyActionType.Compile, compile);
}