Jon Staab
93 lines
1.7 KiB
TypeScript
93 lines
1.7 KiB
TypeScript
import {remove} from "@welshman/lib"
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import {normalizeRelayUrl} from "@welshman/util"
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import {Socket} from "./socket.js"
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import {defaultSocketPolicies} from "./policy.js"
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export const makeSocket = (url: string, policies = defaultSocketPolicies) => {
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const socket = new Socket(url)
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for (const applyPolicy of policies) {
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applyPolicy(socket)
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}
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return socket
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}
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export type PoolSubscription = (socket: Socket) => void
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export type PoolOptions = {
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makeSocket?: (url: string) => Socket
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}
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export let poolSingleton: Pool
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export class Pool {
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_data = new Map<string, Socket>()
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_subs: PoolSubscription[] = []
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static getSingleton() {
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if (!poolSingleton) {
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poolSingleton = new Pool()
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}
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return poolSingleton
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}
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constructor(readonly options: PoolOptions = {}) {}
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has(url: string) {
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return this._data.has(normalizeRelayUrl(url))
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}
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makeSocket(url: string) {
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if (this.options.makeSocket) {
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return this.options.makeSocket(url)
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}
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return makeSocket(url)
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}
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get(_url: string): Socket {
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const url = normalizeRelayUrl(_url)
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const oldSocket = this._data.get(url)
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if (oldSocket) {
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return oldSocket
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}
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const socket = this.makeSocket(url)
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this._data.set(url, socket)
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for (const cb of this._subs) {
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cb(socket)
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}
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return socket
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}
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subscribe(cb: PoolSubscription) {
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this._subs.push(cb)
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return () => {
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this._subs = remove(cb, this._subs)
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}
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}
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remove(url: string) {
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const socket = this._data.get(url)
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if (socket) {
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socket.cleanup()
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this._data.delete(url)
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}
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}
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clear() {
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for (const url of this._data.keys()) {
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this.remove(url)
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}
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}
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}
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