Jon Staab
151 lines
3.7 KiB
TypeScript
151 lines
3.7 KiB
TypeScript
import {writable, Subscriber} from "svelte/store"
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import {tryCatch, fetchJson, batcher, postJson, last} from "@welshman/lib"
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import {
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getter,
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deriveItems,
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deriveDeduplicated,
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makeForceLoadItem,
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makeLoadItem,
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makeDeriveItem,
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} from "@welshman/store"
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import {deriveProfile, loadProfile} from "./profiles.js"
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import {appContext} from "./context.js"
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export type Handle = {
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nip05: string
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pubkey?: string
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nip46?: string[]
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relays?: string[]
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}
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export async function queryProfile(nip05: string) {
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const parts = nip05.split("@")
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const name = parts.length > 1 ? parts[0] : "_"
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const domain = last(parts)
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try {
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const {
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names,
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relays = {},
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nip46 = {},
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} = await fetchJson(`https://${domain}/.well-known/nostr.json?name=${name}`)
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const pubkey = names[name]
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if (!pubkey) {
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return undefined
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}
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return {
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nip05,
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pubkey,
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nip46: nip46[pubkey],
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relays: relays[pubkey],
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}
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} catch (_e) {
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return undefined
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}
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}
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export const handlesByNip05 = writable(new Map<string, Handle>())
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export const handles = deriveItems(handlesByNip05)
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export const getHandlesByNip05 = getter(handlesByNip05)
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export const getHandles = getter(handles)
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export const getHandle = (nip05: string) => getHandlesByNip05().get(nip05)
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export const handleSubscribers: Subscriber<Handle>[] = []
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export const notifyHandle = (handle: Handle) => handleSubscribers.forEach(sub => sub(handle))
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export const onHandle = (sub: (handle: Handle) => void) => {
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handleSubscribers.push(sub)
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return () => {
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const i = handleSubscribers.findIndex(s => s === sub)
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if (i !== -1) handleSubscribers.splice(i, 1)
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}
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}
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export const fetchHandle = batcher(800, async (nip05s: string[]) => {
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const result = new Map<string, Handle>()
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// Use dufflepud if we it's set up to protect user privacy, otherwise fetch directly
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if (appContext.dufflepudUrl) {
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const res: any = await tryCatch(
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async () => await postJson(`${appContext.dufflepudUrl}/handle/info`, {handles: nip05s}),
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)
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for (const {handle: nip05, info} of res?.data || []) {
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if (info) {
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result.set(nip05, {...info, nip05})
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}
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}
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} else {
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const results = await Promise.all(
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nip05s.map(async nip05 => ({
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nip05,
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info: await tryCatch(async () => await queryProfile(nip05)),
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})),
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)
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for (const {nip05, info} of results) {
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if (info) {
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result.set(nip05, {...info, nip05})
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}
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}
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}
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handlesByNip05.update($handlesByNip05 => {
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for (const [nip05, info] of result) {
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$handlesByNip05.set(nip05, info)
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}
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return $handlesByNip05
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})
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for (const info of result.values()) {
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notifyHandle(info)
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}
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return nip05s.map(nip05 => result.get(nip05))
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})
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export const forceLoadHandle = makeForceLoadItem(fetchHandle, getHandle)
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export const loadHandle = makeLoadItem(fetchHandle, getHandle)
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export const deriveHandle = makeDeriveItem(handlesByNip05, loadHandle)
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export const loadHandleForPubkey = async (pubkey: string, relays: string[] = []) => {
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const $profile = await loadProfile(pubkey, relays)
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return $profile?.nip05 ? loadHandle($profile.nip05) : undefined
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}
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export const deriveHandleForPubkey = (pubkey: string, relays: string[] = []) => {
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loadHandleForPubkey(pubkey, relays)
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return deriveDeduplicated(
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[handlesByNip05, deriveProfile(pubkey, relays)],
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([$handlesByNip05, $profile]) => {
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if (!$profile?.nip05) return undefined
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const handle = $handlesByNip05.get($profile.nip05)
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if (handle?.pubkey !== pubkey) return undefined
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return handle
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},
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)
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}
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export const displayNip05 = (nip05: string) =>
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nip05?.startsWith("_@") ? last(nip05.split("@")) : nip05
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export const displayHandle = (handle: Handle) => displayNip05(handle.nip05)
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