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refactor(simulation): type RPC request payloads (#35734)

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James Long 2026-07-07 09:21:19 -04:00 • committed by GitHub
commit b6a2912bb1
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6 changed files with 48 additions and 40 deletions
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24
packages/simulation/src/frontend/server.ts
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@ -7,29 +7,20 @@ export interface Server {
readonly stop: () => void
}
function actionParam(params: unknown) {
return SimulationProtocol.Frontend.decodeActionParams(params).action
}
function parseRequest(input: string | Buffer) {
return SimulationProtocol.JsonRpc.decodeRequest(JSON.parse(typeof input === "string" ? input : input.toString()))
return SimulationProtocol.Frontend.decodeRequest(JSON.parse(typeof input === "string" ? input : input.toString()))
}
async function handle(harness: Harness, request: SimulationProtocol.JsonRpc.Request) {
async function handle(harness: Harness, request: SimulationProtocol.Frontend.Request, headless: boolean) {
switch (request.method) {
case "ui.state": {
if (headless) await harness.renderOnce()
const result = SimulationActions.state(harness)
SimulationTrace.add("ui.state", { elements: result.elements.length, actions: result.actions.length })
return result
}
case "ui.action":
return SimulationActions.execute(harness, actionParam(request.params))
case "ui.render": {
await harness.renderOnce()
const result = SimulationActions.state(harness)
SimulationTrace.add("ui.render", { elements: result.elements.length, actions: result.actions.length })
return result
}
return SimulationActions.execute(harness, request.params.action)
case "trace.list":
return { records: SimulationTrace.list() }
case "trace.clear":
@ -38,10 +29,9 @@ async function handle(harness: Harness, request: SimulationProtocol.JsonRpc.Requ
case "trace.export":
return SimulationTrace.exportTrace()
}
throw new Error(`Unknown simulation method: ${request.method}`)
}
export function start(harness: Harness, endpoint: string): Server {
export function start(harness: Harness, endpoint: string, headless: boolean): Server {
const url = new URL(endpoint)
const server = Bun.serve<{ readonly drive: true }>({
hostname: url.hostname,
@ -58,10 +48,10 @@ export function start(harness: Harness, endpoint: string): Server {
SimulationTrace.add("control.disconnect")
},
async message(socket, message) {
let request: SimulationProtocol.JsonRpc.Request | undefined
let request: SimulationProtocol.Frontend.Request | undefined
try {
request = parseRequest(message)
const result = await handle(harness, request)
const result = await handle(harness, request, headless)
const next = SimulationProtocol.JsonRpc.success(request.id, result)
if (next) socket.send(JSON.stringify(next))
} catch (error) {