Support invite links on discover page

src/app/components/SpaceInviteAccept.svelte

@@ -1,7 +1,5 @@
 <script lang="ts">
   import type {Snippet} from "svelte"
-  import {tryCatch, fromPairs} from "@welshman/lib"
-  import {isRelayUrl, normalizeRelayUrl} from "@welshman/util"
   import {Pool, AuthStatus} from "@welshman/net"
   import {preventDefault} from "@lib/html"
   import {slideAndFade} from "@lib/transition"
@@ -19,6 +17,7 @@
   import {pushToast} from "@app/util/toast"
   import {pushModal} from "@app/util/modal"
   import {attemptRelayAccess} from "@app/core/commands"
+  import {parseInviteLink} from "@app/core/state"
 
   type Props = {
     invite: string
@@ -57,24 +56,7 @@
 
   let loading = $state(false)
 
-  const inviteData = $derived.by(
-    () =>
-      tryCatch(() => {
-        const {r: relay = "", c: claim = ""} = fromPairs(Array.from(new URL(invite).searchParams))
-        const url = normalizeRelayUrl(relay)
-
-        if (isRelayUrl(url)) {
-          return {url, claim}
-        }
-      }) ||
-      tryCatch(() => {
-        const url = normalizeRelayUrl(invite)
-
-        if (isRelayUrl(url)) {
-          return {url, claim: ""}
-        }
-      }),
-  )
+  const inviteData = $derived(parseInviteLink(invite))
 </script>
 
 <form class="column gap-4" onsubmit={preventDefault(join)}>

src/app/core/state.ts

@@ -25,6 +25,7 @@ import {
   groupBy,
   always,
   tryCatch,
+  fromPairs,
 } from "@welshman/lib"
 import type {Socket} from "@welshman/net"
 import {
@@ -1004,3 +1005,22 @@ export const deriveRelayAuthError = (url: string, claim = "") => {
     },
   )
 }
+
+export type InviteData = {url: string; claim: string}
+
+export const parseInviteLink = (invite: string): InviteData | undefined =>
+  tryCatch(() => {
+    const {r: relay = "", c: claim = ""} = fromPairs(Array.from(new URL(invite).searchParams))
+    const url = normalizeRelayUrl(relay)
+
+    if (isRelayUrl(url)) {
+      return {url, claim}
+    }
+  }) ||
+  tryCatch(() => {
+    const url = normalizeRelayUrl(invite)
+
+    if (isRelayUrl(url)) {
+      return {url, claim: ""}
+    }
+  })