ef439a5d8e
The print-time files are pinned (poster-render.js and its classic copy, packet-strings.json, ne-places.json, india-states.json) and were fetched with cache: 'force-cache', which returns any cached copy, however old. After a re-pin, a reader who had printed before kept the previous copy: it failed its pin on every print and the print fell back without a word. Page 1 became the stored poster, a non-English packet would print in English, and India's state cards would be lost. sha384.js fetchPinned fetches force-cache first (fast, and offline once cached) and, when the copy is not served or fails its pin, once more with cache: 'reload', which skips and refreshes the HTTP cache; only that answer decides. posterSheets (the generator and the places table), packetStrings and indiaStates all fetch through it. The classic-script path refreshes the cache the same way and retries a refused tag once. check:pinned-fetch-fresh models the HTTP cache with stale copies: page 1 still draws, the packet keeps every language, India keeps its 36 states; a matching cached copy is used with one request; wrong bytes are refused. The previous loaders fail it. Self-test poisons: no fresh refetch, never the cache, a mismatch accepted, a loader fetching its pinned file directly.
47 lines
2.7 KiB
JavaScript
47 lines
2.7 KiB
JavaScript
/**
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* packetStrings — the text of every printed packet, list and card deck, in all 11 languages, FETCHED at print
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* time from the served tree (<assets>/lib/packet-strings.json) instead of bundled.
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*
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* WHY. A single-file build inlines every import, dynamic ones included, so the whole table (~115 KB
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* minified: every language's prayer points, captions and headings) rode in every bundle that can print —
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* country-posters crossed the 1.5 MB ceiling once its wall's print messages were translated. A reader needs
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* the table only when they print. Same move as the sheet generator and ne-places.json (posterSheets.js).
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*
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* PINNED like them (PACKET_STRINGS_SHA384): the text is hashed before it is parsed, and a table that is not
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* the pinned one is not used. These strings are laid into the print document, so an unverified copy must
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* never reach it.
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*
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* ★ ENGLISH IS BUNDLED AS THE FALLBACK, so a print never fails for want of this file: without an asset base
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* (a host that sets none), on file:// where a page cannot fetch, on a network error, or on an integrity
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* mismatch, the packet prints in English and the console says why. `{ en }` is a named import of the JSON, so
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* only the English block is bundled; the other ten languages stay on the server.
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*/
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import { en as EN } from '../scripts/posters/packet-strings.json'
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import { PACKET_STRINGS_SHA384 } from './poster-render.integrity.js'
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import { fetchPinned } from './sha384.js'
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// Captured when the module evaluates, as in posterSheets.js: a relative asset base resolves against the page
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// that loaded the map, even if a single-page host changes its URL before the click.
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const PAGE_BASE = globalThis.document?.baseURI || undefined
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const ENGLISH_ONLY = Object.freeze({ en: EN })
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const cache = new Map()
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/** The full table ({ en, es, …, zh }), or `{ en }` when the served copy cannot be used. Never rejects. */
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export function loadPacketStrings(assetsBase) {
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if (!assetsBase) return Promise.resolve(ENGLISH_ONLY)
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let url
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try { url = new URL(`${assetsBase}/lib/packet-strings.json`, PAGE_BASE).href } catch { return Promise.resolve(ENGLISH_ONLY) }
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if (!cache.has(url)) {
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const p = (async () => {
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// force-cache, and once more fresh on a mismatch: a stale cached copy after a re-pin must not turn a
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// returning reader's packet English (sha384.js fetchPinned says why).
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return JSON.parse(await fetchPinned(url, PACKET_STRINGS_SHA384))
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})().catch((e) => {
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console.warn(`[packetStrings] ${url}: ${e?.message || e} — printing in English`)
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cache.delete(url) // a later print tries again rather than inheriting one failure
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return ENGLISH_ONLY
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})
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cache.set(url, p)
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}
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return cache.get(url)
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}
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