Overhaul relay settings page

src/app/components/RelayAdd.svelte

@@ -1,30 +1,70 @@
 <script lang="ts">
   import {onMount} from "svelte"
+  import {SvelteSet} from "svelte/reactivity"
   import type {Readable} from "svelte/store"
   import {tryCatch} from "@welshman/lib"
-  import {isShareableRelayUrl, normalizeRelayUrl} from "@welshman/util"
-  import {relaySearch} from "@welshman/app"
+  import {isShareableRelayUrl, isIPAddress, normalizeRelayUrl} from "@welshman/util"
+  import type {Thunk} from "@welshman/app"
+  import {waitForThunkError, relaySearch} from "@welshman/app"
   import {createScroller} from "@lib/html"
+  import {errorMessage} from "@lib/util"
   import Magnifier from "@assets/icons/magnifier.svg?dataurl"
   import AddCircle from "@assets/icons/add-circle.svg?dataurl"
   import Icon from "@lib/components/Icon.svelte"
   import Button from "@lib/components/Button.svelte"
   import Modal from "@lib/components/Modal.svelte"
   import ModalBody from "@lib/components/ModalBody.svelte"
+  import ModalFooter from "@lib/components/ModalFooter.svelte"
   import RelayItem from "@app/components/RelayItem.svelte"
+  import {pushToast} from "@app/util/toast"
 
   interface Props {
     relays: Readable<string[]>
-    addRelay: (url: string) => void
+    addRelay: (url: string) => Promise<Thunk>
+    matchRelay?: (url: string) => boolean
   }
 
-  const {relays, addRelay}: Props = $props()
+  const {relays, addRelay, matchRelay}: Props = $props()
+
+  const back = () => history.back()
+
+  const customUrl = $derived(tryCatch(() => normalizeRelayUrl(term)))
+
+  const add = async (url: string) => {
+    loading.add(url)
+
+    try {
+      const error = await waitForThunkError(await addRelay(url))
+
+      if (error) {
+        pushToast({
+          theme: "error",
+          message: `Failed to add relay: ${errorMessage(error)}`,
+        })
+      }
+    } finally {
+      loading.delete(url)
+    }
+  }
 
   let term = $state("")
   let limit = $state(20)
   let element: Element | undefined = $state()
 
-  const customUrl = $derived(tryCatch(() => normalizeRelayUrl(term)))
+  const loading = $state(new SvelteSet<string>())
+
+  const searchResults = $derived(
+    $relaySearch
+      .searchValues(term)
+      .filter(url => {
+        if (matchRelay?.(url) === false) return false
+        if ($relays.includes(url)) return false
+        if (isIPAddress(url)) return false
+
+        return true
+      })
+      .slice(0, limit),
+  )
 
   onMount(() => {
     const scroller = createScroller({
@@ -52,23 +92,35 @@
         <RelayItem url={term}>
           <Button
             class="btn btn-outline btn-sm flex items-center"
-            onclick={() => addRelay(customUrl)}>
-            <Icon icon={AddCircle} />
+            disabled={loading.has(customUrl)}
+            onclick={() => add(customUrl)}>
+            {#if loading.has(customUrl)}
+              <span class="loading loading-spinner loading-sm"></span>
+            {:else}
+              <Icon icon={AddCircle} />
+            {/if}
             Add Relay
           </Button>
         </RelayItem>
       {/if}
-      {#each $relaySearch
-        .searchValues(term)
-        .filter(url => !$relays.includes(url))
-        .slice(0, limit) as url (url)}
+      {#each searchResults as url (url)}
         <RelayItem {url}>
-          <Button class="btn btn-outline btn-sm flex items-center" onclick={() => addRelay(url)}>
-            <Icon icon={AddCircle} />
+          <Button
+            class="btn btn-outline btn-sm flex items-center"
+            disabled={loading.has(url)}
+            onclick={() => add(url)}>
+            {#if loading.has(url)}
+              <span class="loading loading-spinner loading-sm"></span>
+            {:else}
+              <Icon icon={AddCircle} />
+            {/if}
             Add Relay
           </Button>
         </RelayItem>
       {/each}
     </div>
   </ModalBody>
+  <ModalFooter>
+    <Button class="btn btn-primary flex-grow" onclick={back}>Done</Button>
+  </ModalFooter>
 </Modal>