Add Relay, Pool

lib/Pool.ts

@@ -0,0 +1,46 @@
+import {Relay} from "./Relay"
+
+const normalizeUrl = url => url.replace(/\/+$/, "").toLowerCase().trim()
+
+export class Pool {
+  constructor() {
+    this.relays = new Map()
+  }
+  add(url) {
+    url = normalizeUrl(url)
+
+    if (!this.relays.has(url)) {
+      this.relays.set(url, new Relay(url))
+    }
+
+    return this.relays.get(url)
+  }
+  remove(url) {
+    url = normalizeUrl(url)
+
+    this.relays.get(url)?.disconnect()
+    this.relays.delete(url)
+  }
+  async waitFor(url) {
+    const relay = this.add(url)
+
+    await relay.connect()
+
+    return relay.status === Relay.STATUS.READY ? relay : null
+  }
+  async execute(urls, callback) {
+    const results = await Promise.all([
+      urls.map(async url => {
+        const relay = await this.waitFor(url)
+
+        if (!relay) {
+          return null
+        }
+
+        return [relay, callback(relay)]
+      }),
+    ])
+
+    return results.filter(Boolean)
+  }
+}