67 lines
2.8 KiB
TypeScript
67 lines
2.8 KiB
TypeScript
// Cache-busting for the public CMS page API (`/api/pages/[...slug]`,
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// wrapped with defineCachedEventHandler). Call purgeCmsPage() after any
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// mutation that changes a page's rendered response so the next request
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// re-populates from Postgres.
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//
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// Scope: current page only — siblings/parent entries stay cached until
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// their own TTL expires. Fine for now; a future archive/category
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// feature will formalize the tree and give us cleaner invalidation.
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import { ENABLED_LANGUAGE_CODES } from '~~/config/languages'
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import { db } from './database'
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// Key format matches what defineCachedEventHandler writes in
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// server/api/pages/[...slug].get.ts. Nitro composes
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// {base}:{group}:{name}:{escapeKey(getKey(event))}.json
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// and escapeKey() strips non-word characters, so the handler's getKey
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// hex-encodes the slug to stay collision-free. We mirror that here.
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const KEY_PREFIX = 'nitro:handlers:cms'
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function storageKey(slug: string, locale: string) {
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return `${KEY_PREFIX}:${locale}_${Buffer.from(slug).toString('hex')}.json`
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}
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export async function purgeCmsPage(slug: string, locales?: string[]) {
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const storage = useStorage('cache')
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const targets = locales ?? ENABLED_LANGUAGE_CODES
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await Promise.all(
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targets.map(locale => storage.removeItem(storageKey(slug, locale)))
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)
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}
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// Purge every page in a category across all locales. Needed whenever a
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// field that leaks into a sibling's cached response changes — titles,
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// excerpts, featured images (all embedded in `children[]`) and
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// menu_order (alters sibling sort order). `excludeSlugs` lets the
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// caller skip pages whose entries were already purged independently
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// (avoids duplicate removeItem calls + lets `applyPageInvalidations`
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// pass the page-being-modified's slug — and its old slug, on a
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// category move — through).
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export async function purgeCmsCategory(
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categoryId: string,
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excludeSlugs?: string | ReadonlyArray<string>
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): Promise<void> {
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const skip = new Set<string>(
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excludeSlugs === undefined
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? []
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: (typeof excludeSlugs === 'string' ? [excludeSlugs] : excludeSlugs)
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)
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const rows = await db
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.selectFrom('pages')
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.select('slug')
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.where('category_id', '=', categoryId)
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.execute()
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const slugs = rows.map(r => r.slug).filter(s => !skip.has(s))
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await Promise.all(slugs.map(s => purgeCmsPage(s)))
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}
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// Wipe every cached CMS page response. Used by the admin "Flush Cache"
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// action when targeted per-slug purges aren't enough (e.g. after a
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// direct DB seed or when the editor wants a hard reset). Returns the
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// number of keys removed so the UI can show a confirmation.
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export async function purgeAllCmsCache(): Promise<number> {
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const storage = useStorage('cache')
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const keys = await storage.getKeys(KEY_PREFIX)
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await Promise.all(keys.map(k => storage.removeItem(k)))
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return keys.length
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}
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