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add event handler for frontend #2

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add event handler for frontend #2

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e134e67
fe setup to listen to it
clifforum Jan 23, 2025
4c0ae70
pureview events
clifforum Jan 23, 2025
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18 changes: 18 additions & 0 deletions src/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,15 @@ const INITIAL_WAIT_TIME = 250

const STYLE_TAG_ERROR = `Purview: expected element with ID ${STYLE_TAG_ID} to be a style tag generated by purview`

export type PurviewEvent = {
type: 'websocket:open' | 'websocket:close' | 'websocket:message' | 'websocket:error' | 'component:update';
detail?: any;
}

export const dispatchPurviewEvent = (event: PurviewEvent) => {
window.dispatchEvent(new CustomEvent('purview', { detail: event }));
};

export function connectWebSocket(location: Location): WebSocket {
// For more context, see comment in src/browser.ts where we wait for the DOM to load.
if (document.readyState === "loading") {
Expand Down Expand Up @@ -74,6 +83,7 @@ function addWebSocketHandlers(state: WebSocketState, location: Location): void {

let interval: ReturnType<typeof setInterval> | null = null
ws.addEventListener("open", () => {
dispatchPurviewEvent({ type: 'websocket:open' });
const rootElems = Array.from(document.querySelectorAll("[data-root]"))
const rootIDs = rootElems.map(elem => {
return elem.getAttribute("data-component-id") as string
Expand Down Expand Up @@ -128,11 +138,19 @@ function addWebSocketHandlers(state: WebSocketState, location: Location): void {
}
})

ws.addEventListener("error", (error) => {
dispatchPurviewEvent({
type: 'websocket:error',
detail: { error }
});
});

ws.addEventListener("close", () => {
if (interval) {
clearInterval(interval)
interval = null
}
dispatchPurviewEvent({ type: 'websocket:close', detail: { retries: state.numRetries } });

if (state.numRetries === MAX_RETRIES) {
location.reload()

@denpoly-orum denpoly-orum Jan 23, 2025 •
edited
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I'd also consider adding a log event here too, so we have a record of the refresh 😎

Expand Down