99 lines
2.4 KiB
TypeScript
99 lines
2.4 KiB
TypeScript
// import { useSWR } from "sswr";
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import LRU from "lru-cache";
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import { derived, Readable } 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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export type EntityInfo =
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| {
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t: "Hash" | "Uuid";
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}
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| {
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t: "Attribute" | "Url";
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c: string;
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};
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export interface EntityListing {
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entity: EntityInfo;
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entries: ListingResult;
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}
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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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export function useEntity(address: string) {
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const { data, error, revalidate } = useSWR<EntityListing, unknown>(
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`api/obj/${address}`
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);
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const entity: Readable<UpObject | undefined> = derived(data, ($listing) => {
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if ($listing) {
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const listing = new UpListing($listing.entries);
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return listing.getObject(address);
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}
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});
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const entityInfo: Readable<EntityInfo | undefined> = derived(
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data,
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($listing) => {
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if ($listing) {
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return $listing.entity;
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}
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}
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);
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return {
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entity,
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entityInfo,
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error,
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revalidate,
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};
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}
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export async function fetchEntry(address: string) {
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const response = await fetch(`api/raw/${address}`);
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const data = await response.json();
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const listing = new UpListing({ address: data });
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return listing.entries[0];
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}
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export function query(query: string) {
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console.debug(`Querying: ${query}`);
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const { data, error, revalidate } = useSWR<ListingResult, unknown>(
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"api/query",
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{ method: "POST", body: query }
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);
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const result = derived(data, ($values) => {
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return $values ? new UpListing($values) : undefined;
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});
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return {
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result,
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error,
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revalidate,
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};
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}
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export async function queryOnce(query: string): Promise<UpListing> {
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const cacheResult = queryOnceLRU.get(query);
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if (!cacheResult) {
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if (!inFlightRequests[query]) {
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console.debug(`Querying: ${query}`);
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inFlightRequests[query] = new Promise((resolve, reject) => {
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fetch("api/query", { method: "POST", body: query, keepalive: true })
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.then(async (response) => {
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resolve(new UpListing(await response.json()));
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})
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.catch((err) => reject(err));
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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[query];
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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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