49 lines
2.5 KiB
Plaintext
49 lines
2.5 KiB
Plaintext
import { createHrefFromUrl } from "../create-href-from-url";
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import { fetchServerResponse } from "../fetch-server-response";
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import { PrefetchKind } from "../router-reducer-types";
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import { createRecordFromThenable } from "../create-record-from-thenable";
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import { prunePrefetchCache } from "./prune-prefetch-cache";
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import { NEXT_RSC_UNION_QUERY } from "../../app-router-headers";
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import { PromiseQueue } from "../../promise-queue";
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export const prefetchQueue = new PromiseQueue(5);
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export function prefetchReducer(state, action) {
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// let's prune the prefetch cache before we do anything else
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prunePrefetchCache(state.prefetchCache);
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const { url } = action;
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url.searchParams.delete(NEXT_RSC_UNION_QUERY);
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const href = createHrefFromUrl(url, // Ensures the hash is not part of the cache key as it does not affect fetching the server
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false);
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const cacheEntry = state.prefetchCache.get(href);
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if (cacheEntry) {
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/**
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* If the cache entry present was marked as temporary, it means that we prefetched it from the navigate reducer,
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* where we didn't have the prefetch intent. We want to update it to the new, more accurate, kind here.
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*/ if (cacheEntry.kind === PrefetchKind.TEMPORARY) {
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state.prefetchCache.set(href, {
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...cacheEntry,
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kind: action.kind
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});
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}
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/**
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* if the prefetch action was a full prefetch and that the current cache entry wasn't one, we want to re-prefetch,
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* otherwise we can re-use the current cache entry
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**/ if (!(cacheEntry.kind === PrefetchKind.AUTO && action.kind === PrefetchKind.FULL)) {
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return state;
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}
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}
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// fetchServerResponse is intentionally not awaited so that it can be unwrapped in the navigate-reducer
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const serverResponse = createRecordFromThenable(prefetchQueue.enqueue(()=>fetchServerResponse(url, // initialTree is used when history.state.tree is missing because the history state is set in `useEffect` below, it being missing means this is the hydration case.
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state.tree, state.nextUrl, state.buildId, action.kind)));
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// Create new tree based on the flightSegmentPath and router state patch
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state.prefetchCache.set(href, {
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// Create new tree based on the flightSegmentPath and router state patch
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treeAtTimeOfPrefetch: state.tree,
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data: serverResponse,
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kind: action.kind,
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prefetchTime: Date.now(),
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lastUsedTime: null
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});
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return state;
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}
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//# sourceMappingURL=prefetch-reducer.js.map |