2021-11-11 23:37:42 +01:00
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// import { useSWR } from "sswr";
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import LRU from "lru-cache";
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2021-12-19 13:54:16 +01:00
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import { derived, Readable, Writable, writable } from "svelte/store";
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import { UpListing, UpObject } from "upend";
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import type { ListingResult } from "upend/types";
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import { useSWR } from "../util/fetch";
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2021-11-11 23:37:42 +01:00
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2021-12-19 13:54:16 +01:00
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const queryOnceLRU = new LRU<string, UpListing>(128);
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const inFlightRequests: { [key: string]: Promise<UpListing> } = {};
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2021-11-11 23:37:42 +01:00
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2021-12-19 13:54:16 +01:00
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export function useEntity(address: string) {
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const { data, error, revalidate } = useSWR<ListingResult, unknown>(
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() => `/api/obj/${address}`
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2021-11-11 23:37:42 +01:00
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);
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2021-12-19 13:54:16 +01:00
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const entity: Readable<UpObject | undefined> = derived(data, ($listing) => {
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if ($listing) {
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const listing = new UpListing($listing);
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return listing.objects.find((obj) => obj.address == address);
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}
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2021-11-11 23:37:42 +01:00
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});
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return {
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2021-12-19 13:54:16 +01:00
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entity,
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2021-11-11 23:37:42 +01:00
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error,
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revalidate,
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};
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}
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export function query(query: () => string) {
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let queryString = typeof query === "string" ? query : query();
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console.debug(`Querying: ${queryString}`);
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const { data, error, revalidate } = useSWR<ListingResult, unknown>(
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() => `/api/obj?query=${query()}`
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);
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const result = derived(data, ($values) => {
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2021-12-19 13:54:16 +01:00
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return $values ? new UpListing($values) : undefined;
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2021-11-11 23:37:42 +01:00
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});
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return {
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result,
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data,
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error,
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revalidate,
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};
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}
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2021-12-19 13:54:16 +01:00
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export async function queryOnce(query: string): Promise<UpListing> {
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2021-11-11 23:37:42 +01:00
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const cacheResult = queryOnceLRU.get(query);
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if (!cacheResult) {
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2021-11-24 14:55:26 +01:00
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const url = `/api/obj?query=${query}`;
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if (!inFlightRequests[url]) {
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console.debug(`Querying: ${query}`);
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inFlightRequests[url] = new Promise(async (resolve, reject) => {
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2021-11-28 17:25:39 +01:00
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const response = await fetch(url, { keepalive: true });
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2021-12-19 13:54:16 +01:00
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resolve(new UpListing(await response.json()));
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2021-11-24 14:55:26 +01:00
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});
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} else {
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console.debug(`Chaining request for ${query}...`);
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}
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return await inFlightRequests[url];
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2021-11-11 23:37:42 +01:00
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} else {
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console.debug(`Returning cached: ${query}`);
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return cacheResult;
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}
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}
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