Show a reply count on home network notes and stop virtualizing the feed

e2e/USER_STORIES.md

@@ -1571,6 +1571,9 @@ Acceptance:
 
 - The Network section lists notes from her follows, resolved through the relays
   those people publish to.
+- It is a list of notes: a reply is counted on the note it answers rather than
+  drawn underneath it, and never appears as an item of its own.
+- Every note carries its reply count, including the ones with no replies.
 - Scrolling to the end of the feed loads more rather than asking her to.
 
 ### US-106 — Share text into the app

e2e/specs/notifications.spec.ts

@@ -417,6 +417,8 @@ test("US-116 read the home dashboard", async ({seed, as}) => {
 
 test("US-117 read the network feed on home", async ({seed, as}) => {
   const note = "the tide charts are wrong again"
+  const quiet = "the ferry is running on time"
+  const reply = "they were reprinted last week"
 
   await seed(({relay, user}) => {
     const space = relay("space")
@@ -433,13 +435,31 @@ test("US-117 read the network feed on home", async ({seed, as}) => {
     space.event(user.alice, () =>
       space.kind(FollowList).writer().follow(user.bob.pubkey).renderTemplate(),
     )
-    space.event(user.bob, () => space.kind(Note).writer().setContent(note).renderTemplate())
+
+    const posted = space.event(user.bob, () =>
+      space.kind(Note).writer().setContent(note).renderTemplate(),
+    )
+
+    space.event(user.bob, () => space.kind(Note).writer().setContent(quiet).renderTemplate())
+
+    space.event(user.bob, () =>
+      space.kind(Note).writer().setParent(posted.event).setContent(reply).renderTemplate(),
+    )
   })
 
   const page = await as(users.alice, "/home")
 
   await expect(page.getByRole("heading", {name: "Network"})).toBeVisible()
   await expect(page.getByText(note)).toBeVisible()
+
+  // The feed is notes only: a reply is counted on the note it answers rather than drawn
+  // underneath it, and it never gets a card of its own.
+  await expect(page.getByRole("button", {name: "1 reply", exact: true})).toBeVisible()
+  await expect(page.getByText(reply)).toHaveCount(0)
+
+  // The count is there whether or not anybody replied, so every note reads the same.
+  await expect(page.getByText(quiet)).toBeVisible()
+  await expect(page.getByRole("button", {name: "0 replies"})).toBeVisible()
 })
 
 test("US-106 share text into the app", async ({seed, as}) => {

src/app/components/CommentTree.svelte

@@ -24,10 +24,9 @@
     setReplyTo?: (comment?: TrustedEvent) => void
     url?: string
     context: FeedContext
-    maxDepth?: number
   }
 
-  const {node, root, replyTo, setReplyTo, url, context, maxDepth = Infinity}: Props = $props()
+  const {node, root, replyTo, setReplyTo, url, context}: Props = $props()
 
   const composing = $derived(replyTo?.id === node.comment.id)
 
@@ -94,21 +93,14 @@
         onSubmit={clearReplyTo} />
     </div>
   {/if}
-  {#if node.children.length > 0 && maxDepth > 1}
+  {#if node.children.length > 0}
     <!-- The thread line runs under the avatar's center and indents replies to line up with
          this comment's text column; it brightens while the subtree is hovered. -->
     <div
       data-component="CommentReplies"
       class="border-line-less hover:border-line ml-4 flex flex-col border-l pl-7 transition-colors">
       {#each node.children as child (child.comment.id)}
-        <CommentTree
-          node={child}
-          {root}
-          {replyTo}
-          {setReplyTo}
-          {url}
-          {context}
-          maxDepth={maxDepth - 1} />
+        <CommentTree node={child} {root} {replyTo} {setReplyTo} {url} {context} />
       {/each}
     </div>
   {/if}

src/app/components/HomeNetworkItem.svelte

@@ -1,12 +1,12 @@
 <script lang="ts">
-  import {sortBy} from "@welshman/lib"
   import {COMMENT, NOTE} from "@welshman/util"
   import type {TrustedEvent} from "@welshman/util"
-  import Cv from "@lib/components/Cv.svelte"
+  import Reply from "@assets/icons/reply-2.svg?dataurl"
+  import Icon from "@lib/components/Icon.svelte"
+  import Button from "@lib/components/Button.svelte"
   import NoteItem from "@app/components/NoteItem.svelte"
-  import CommentTree from "@app/components/CommentTree.svelte"
   import type {FeedContext} from "@app/feeds"
-  import {buildCommentTree} from "@app/social"
+  import {goToEvent} from "@app/routes"
 
   type Props = {
     event: TrustedEvent
@@ -17,26 +17,18 @@
 
   const related = context.related(event)
 
-  // buildCommentTree adopts a comment whose parent never loaded, and reads oldest first so
-  // that it adopts a parent before its own children.
-  const nodes = $derived(
-    buildCommentTree(
-      event,
-      sortBy(
-        e => e.created_at,
-        $related.filter(e => e.kind === COMMENT || e.kind === NOTE),
-      ),
-    ),
-  )
+  // Kind 1 notes are replied to with notes as well as with NIP-22 comments.
+  const replyCount = $derived($related.filter(e => e.kind === COMMENT || e.kind === NOTE).length)
+
+  const goToReplies = () => goToEvent(event)
 </script>
 
-<Cv class="card card-interactive flex flex-col gap-3">
-  <NoteItem {event} {context} class="" />
-  {#if nodes.length > 0}
-    <div class="border-line-less flex flex-col border-t">
-      {#each nodes as node (node.comment.id)}
-        <CommentTree {node} root={event} {context} maxDepth={2} />
-      {/each}
-    </div>
-  {/if}
-</Cv>
+<div class="card card-interactive flex flex-col gap-3">
+  <NoteItem {event} {context} card={false}>
+    <Button class="button button-neutral button-xs rounded-full" onclick={goToReplies}>
+      <Icon icon={Reply} size={4} />
+      {replyCount}
+      {replyCount === 1 ? "reply" : "replies"}
+    </Button>
+  </NoteItem>
+</div>

src/app/components/NoteItem.svelte

@@ -19,16 +19,10 @@
     children?: Snippet
     context: FeedContext
     url?: string
-    class?: string
+    card?: boolean
   }
 
-  const {
-    url,
-    event,
-    children,
-    context,
-    class: className = "card card-interactive",
-  }: Props = $props()
+  const {url, event, children, context, card = true}: Props = $props()
 
   const getRelays = () => (url ? [url] : $router.resolver.relays([seen(event)]))
 
@@ -41,7 +35,7 @@
   const onEmoji = (emoji: NativeEmoji) => createReaction({content: emoji.unicode, tags: []})
 </script>
 
-<Cv tag={NoteCard} {event} {url} class={className}>
+{#snippet body()}
   <NoteContent {event} expandMode="inline" />
   <div class="flex w-full justify-between gap-2">
     <ReactionSummary
@@ -60,4 +54,14 @@
     </ReactionSummary>
     {@render children?.()}
   </div>
-</Cv>
+{/snippet}
+
+{#if card}
+  <Cv tag={NoteCard} {event} {url} class="card card-interactive">
+    {@render body()}
+  </Cv>
+{:else}
+  <NoteCard {event} {url}>
+    {@render body()}
+  </NoteCard>
+{/if}