Class QueryCache

packages/query-core/src/queryCache.ts:92–223

// CLASS

export class QueryCache extends Subscribable<QueryCacheListener> {
  #queries: QueryStore

  constructor(public config: QueryCacheConfig = {}) {
    super()
    this.#queries = new Map<string, Query>()
  }

  build<
    TQueryFnData = unknown,
    TError = DefaultError,
    TData = TQueryFnData,
    TQueryKey extends QueryKey = QueryKey,
  >(
    client: QueryClient,
    options: WithRequired<
      QueryOptions<TQueryFnData, TError, TData, TQueryKey>,
      'queryKey'
    >,
    state?: QueryState<TData, TError>,
  ): Query<TQueryFnData, TError, TData, TQueryKey> {
    const queryKey = options.queryKey
    const queryHash =
      options.queryHash ?? hashQueryKeyByOptions(queryKey, options)
    let query = this.get<TQueryFnData, TError, TData, TQueryKey>(queryHash)

    if (!query) {
      query = new Query({
        client,
        queryKey,
        queryHash,
        options: client.defaultQueryOptions(options),
        state,
        defaultOptions: client.getQueryDefaults(queryKey),
      })
      this.add(query)
    }

    return query
  }

  add(query: Query<any, any, any, any>): void {
    if (!this.#queries.has(query.queryHash)) {
      this.#queries.set(query.queryHash, query)

      this.notify({
        type: 'added',
        query,
      })
    }
  }

  remove(query: Query<any, any, any, any>): void {
    const queryInMap = this.#queries.get(query.queryHash)

    if (queryInMap) {
      query.destroy()