mattrguerra/meridian-ops-boardmainPrivate on GitHub, published here in full

variants.ts

Language TypeScript1.9 KB48 lines

apps/dashboard/src/variants.ts

/**
* One rendered page per viewer. Runtime-neutral, so the Worker and the local
* push both use it and cannot drift apart.
*
* Pre-rendered rather than filtered per request: The deployed board's whole shape
* is "the cron does the work, a request is a KV read and nothing else"; see the
* header of apps/worker/src/index.ts. Rendering per request would put page
* assembly on the request path for a page that is a snapshot anyway. So every
* variant is built at sync time and a request picks one.
*
* Variants and not one page, because access control cannot live in the
* browser. Anything sent to a browser has been disclosed, whatever the markup
* says about it; `hidden` is styling.
*/
import { MERIDIAN_PEOPLE } from '../../../config/meridian-people.js'
import type { Snapshot, Headline } from './collect.js'
import type { HistoryRow } from './history.js'
import type { Briefings } from './briefings.js'
import { render } from './render.js'
import { allViewers } from './viewer.js'
/** KV key for a variant. Kept in one place so the writer and reader agree. */
export function variantKey(viewerKey: string): string {
return `dashboard:html:${viewerKey}`
}
/**
* Every page a sync needs to produce, keyed by viewer.
*
* Always includes `company`, which is what an address the roster does not know
* receives. Without it an unrecognised sign-in would have nothing to be served
* and would fall through to whatever the caller decided, and the safe default
* has to exist here rather than being remembered at each call site.
*/
export function renderVariants(
snap: Snapshot,
h: Headline,
history: HistoryRow[],
day: string,
briefings: Briefings | null,
): Map<string, string> {
const out = new Map<string, string>()
for (const viewer of allViewers(MERIDIAN_PEOPLE)) {
out.set(viewer.key, render(snap, h, history, day, briefings, viewer))
}
return out
}