104 lines
3.0 KiB
TypeScript
104 lines
3.0 KiB
TypeScript
import ExecutionController from "./execution-controller";
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import { LanguageEngine, 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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/** 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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/** Initialize the execution controller */
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const initController = () => {
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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 = <RS>(controller: ExecutionController<RS>) => {
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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 = <RS>(
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controller: ExecutionController<RS>,
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{ code, input }: { code: string; input: string }
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) => {
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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 = <RS>(
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controller: ExecutionController<RS>,
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points: number[]
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) => {
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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 = <RS>(controller: ExecutionController<RS>, 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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/** Trigger pause in program execution */
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const pauseExecution = async <RS>(controller: ExecutionController<RS>) => {
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await controller.pauseExecution();
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postMessage(ackMessage("pause"));
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};
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/** Run a single execution step */
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const executeStep = <RS>(controller: ExecutionController<RS>) => {
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const result = controller.executeStep();
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postMessage(resultMessage(result));
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};
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/**
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* Create an execution controller worker script with the given engine.
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* @param engine Language engine to create worker for
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*/
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export const setupWorker = <RS>(engine: LanguageEngine<RS>) => {
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const controller = new ExecutionController(engine);
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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(controller);
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if (ev.data.type === "Prepare") return prepare(controller, ev.data.params);
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if (ev.data.type === "Execute")
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return execute(controller, ev.data.params.interval);
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if (ev.data.type === "Pause") return await pauseExecution(controller);
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if (ev.data.type === "ExecuteStep") return executeStep(controller);
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if (ev.data.type === "UpdateBreakpoints")
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return updateBreakpoints(controller, ev.data.params.points);
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throw new Error("Invalid worker message type");
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});
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};
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