next/dist/esm/server/revalidation-utils.js

The React Framework

import { getCacheHandlers } from './use-cache/handlers';
/** Run a callback, and execute any *new* revalidations added during its runtime. */ export async function withExecuteRevalidates(store, callback) {
    if (!store) {
        return callback();
    }
    // If we executed any revalidates during the request, then we don't want to execute them again.
    // save the state so we can check if anything changed after we're done running callbacks.
    const savedRevalidationState = cloneRevalidationState(store);
    try {
        return await callback();
    } finally{
        // Check if we have any new revalidates, and if so, wait until they are all resolved.
        const newRevalidates = diffRevalidationState(savedRevalidationState, cloneRevalidationState(store));
        await executeRevalidates(store, newRevalidates);
    }
}
function cloneRevalidationState(store) {
    return {
        pendingRevalidatedTags: store.pendingRevalidatedTags ? [
            ...store.pendingRevalidatedTags
        ] : [],
        pendingRevalidates: {
            ...store.pendingRevalidates
        },
        pendingRevalidateWrites: store.pendingRevalidateWrites ? [
            ...store.pendingRevalidateWrites
        ] : []
    };
}
function diffRevalidationState(prev, curr) {
    const prevTags = new Set(prev.pendingRevalidatedTags);
    const prevRevalidateWrites = new Set(prev.pendingRevalidateWrites);
    return {
        pendingRevalidatedTags: curr.pendingRevalidatedTags.filter((tag)=>!prevTags.has(tag)),
        pendingRevalidates: Object.fromEntries(Object.entries(curr.pendingRevalidates).filter(([key])=>!(key in prev.pendingRevalidates))),
        pendingRevalidateWrites: curr.pendingRevalidateWrites.filter((promise)=>!prevRevalidateWrites.has(promise))
    };
}
async function revalidateTags(tags, incrementalCache) {
    if (tags.length === 0) {
        return;
    }
    const promises = [];
    if (incrementalCache) {
        promises.push(incrementalCache.revalidateTag(tags));
    }
    const handlers = getCacheHandlers();
    if (handlers) {
        for (const handler of handlers){
            promises.push(handler.expireTags(...tags));
        }
    }
    await Promise.all(promises);
}
export async function executeRevalidates(workStore, state) {
    const pendingRevalidatedTags = (state == null ? void 0 : state.pendingRevalidatedTags) ?? workStore.pendingRevalidatedTags ?? [];
    const pendingRevalidates = (state == null ? void 0 : state.pendingRevalidates) ?? workStore.pendingRevalidates ?? {};
    const pendingRevalidateWrites = (state == null ? void 0 : state.pendingRevalidateWrites) ?? workStore.pendingRevalidateWrites ?? [];
    return Promise.all([
        revalidateTags(pendingRevalidatedTags, workStore.incrementalCache),
        ...Object.values(pendingRevalidates),
        ...pendingRevalidateWrites
    ]);
}

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