100 lines
2.7 KiB
TypeScript
100 lines
2.7 KiB
TypeScript
import BrainfuckLanguageEngine from "./brainfuck/engine";
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import ExecutionController from "./execution-controller";
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import { StepExecutionResult } from "./types";
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import {
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WorkerAckType,
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WorkerRequestData,
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WorkerResponseData,
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} from "./worker-constants";
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let _controller: ExecutionController<any> | null = null;
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/** Create a worker response for update acknowledgement */
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const ackMessage = <RS>(state: WorkerAckType): WorkerResponseData<RS> => ({
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type: "ack",
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data: state,
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});
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/** Create a worker response for execution result */
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const resultMessage = <RS>(
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result: StepExecutionResult<RS>
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): WorkerResponseData<RS> => ({
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type: "result",
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data: result,
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});
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/**
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* Initialize the execution controller.
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*/
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const initController = () => {
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const engine = new BrainfuckLanguageEngine();
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_controller = new ExecutionController(engine);
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postMessage(ackMessage("init"));
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};
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/**
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* Reset the state of the controller and engine, to
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* prepare for execution of a new program.
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*/
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const resetController = () => {
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_controller!.resetState();
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postMessage(ackMessage("reset"));
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};
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/**
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* Load program code into the engine.
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* @param code Code content of the program
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*/
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const prepare = ({ code, input }: { code: string; input: string }) => {
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_controller!.prepare(code, input);
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postMessage(ackMessage("prepare"));
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};
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/**
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* Update debugging breakpoints
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* @param points List of line numbers having breakpoints
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*/
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const updateBreakpoints = (points: number[]) => {
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_controller!.updateBreakpoints(points);
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postMessage(ackMessage("bp-update"));
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};
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/**
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* Execute the entire program loaded on engine,
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* and return result of execution.
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*/
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const execute = (interval: number) => {
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_controller!.executeAll({
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interval,
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onResult: (res) => postMessage(resultMessage(res)),
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});
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};
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/**
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* Trigger pause in program execution
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*/
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const pauseExecution = async () => {
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await _controller!.pauseExecution();
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postMessage(ackMessage("pause"));
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};
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/**
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* Run a single execution step
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*/
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const executeStep = () => {
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const result = _controller!.executeStep();
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postMessage(resultMessage(result));
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};
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addEventListener("message", async (ev: MessageEvent<WorkerRequestData>) => {
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if (ev.data.type === "Init") return initController();
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if (ev.data.type === "Reset") return resetController();
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if (ev.data.type === "Prepare") return prepare(ev.data.params);
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if (ev.data.type === "Execute") return execute(ev.data.params.interval);
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if (ev.data.type === "Pause") return await pauseExecution();
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if (ev.data.type === "ExecuteStep") return executeStep();
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if (ev.data.type === "UpdateBreakpoints")
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return updateBreakpoints(ev.data.params.points);
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throw new Error("Invalid worker message type");
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});
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