Fix some memory leaks, add executor.load and some utils

src/util/nostr.ts

@@ -0,0 +1,32 @@
+export const stripProto = (url: string) => url.replace(/.*:\/\//, "")
+
+export const isShareableRelay = (url: string) =>
+  // Is it actually a websocket url
+  url.match(/^wss:\/\/.+/) &&
+  // Sometimes bugs cause multiple relays to get concatenated
+  url.match(/:\/\//g)?.length === 1 &&
+  // It shouldn't have any whitespace
+  !url.match(/\s/) &&
+  // Don't match stuff with a port number
+  !url.slice(6).match(/:\d+/) &&
+  // Don't match raw ip addresses
+  !url.slice(6).match(/\d+\.\d+\.\d+\.\d+/) &&
+  // Skip nostr.wine's virtual relays
+  !url.slice(6).match(/\/npub/)
+
+export const normalizeRelayUrl = (url: string) => {
+  // If it doesn't start with a compatible protocol, strip the proto and add wss
+  if (!url.match(/^(wss|local):\/\/.+/)) {
+    url = "wss://" + stripProto(url)
+  }
+
+  try {
+    return new URL(url).href.replace(/\/+$/, "").toLowerCase()
+  } catch (e) {
+    return null
+  }
+}
+
+export const fromNostrURI = (s: string) => s.replace(/^[\w+]+:\/?\/?/, "")
+
+export const toNostrURI = (s: string) => `nostr:${s}`