Show which threads are unread instead of clearing them on arrival (#417)

Co-authored-by: Coracle-Bot <npub1klq6260@nostr.local>

e2e/USER_STORIES.md

@@ -1553,6 +1553,30 @@ Acceptance:
   own room list carries it.
 - Reading the other space takes the dot down.
 
+### US-112 — See which threads are unread
+
+As bob, I want the Threads dot to lead me to the thread that raised it, so that
+the indicator is something I can act on rather than dismiss.
+
+Acceptance:
+
+- A thread alice posted raises an unread dot on the Threads nav item; one bob
+  posted himself does not.
+- Opening the list keeps the dot on alice's row, so he can tell which thread is
+  new, and bob's row still carries none.
+- Leaving the list marks its threads read, and neither the row nor the nav item
+  shows a dot afterwards.
+
+### US-113 — See which threads are unread on a phone
+
+As bob on a phone, I want the same dot on the thread that raised it, so that the
+Threads indicator is as actionable on a phone as it is on a desktop.
+
+Acceptance:
+
+- The thread list below the md breakpoint is a list of links rather than a
+  table, and alice's thread carries a dot there; bob's own does not.
+
 ## Out of scope
 
 Features the e2e suite cannot exercise, and what stops it.

e2e/specs/notifications.spec.ts

@@ -1,7 +1,7 @@
 import {neventEncode, npubEncode} from "nostr-tools/nip19"
 import {HOUR, MINUTE} from "@welshman/lib"
 import {displayRelayUrl} from "@welshman/util"
-import {MessagingRelayList, RelayList} from "@welshman/domain"
+import {MessagingRelayList, RelayList, Thread} from "@welshman/domain"
 import type {Locator, Page} from "@playwright/test"
 import {expect, roomPath, spacePath, test, users} from "../harness"
 import type {SeededSpace, TestUser} from "../harness"
@@ -475,3 +475,107 @@ test("US-110 see another space's unread activity from a phone", async ({seed, as
   await expect(unreadDot(roomLink(bob, "Random"))).toBeVisible()
   await expect(unreadDot(spacesButton)).toHaveCount(0)
 })
+
+// SpaceMenuNavItems hides a content type until the space has an event of that kind, so this link
+// appearing at all is what says the seeded threads loaded.
+const contentNavItem = (page: Page, name: string) =>
+  page.locator(".secondary-nav").getByRole("link", {name})
+
+const seedThread = (space: SeededSpace, user: TestUser, title: string, createdAt: number) =>
+  space.event(
+    user,
+    () =>
+      space
+        .kind(Thread)
+        .writer()
+        .setRoom(space.url, "general")
+        .setTitle(title)
+        .setContent("worth talking about")
+        .renderTemplate(),
+    createdAt,
+  )
+
+test("US-112 see which threads are unread", async ({seed, as}) => {
+  const scenario = await seed(({relay, user, at}) => {
+    const space = relay("space")
+
+    space.room("general", {name: "General"})
+    space.join(user.alice, "general")
+    space.join(user.bob, "general")
+
+    // A thread bob wrote raises no indicator of its own, so it is the control for a row with no dot
+    seedThread(space, user.bob, "where is the sextant", at(3, HOUR))
+    seedThread(space, user.alice, "the server is on fire", at(2, HOUR))
+  })
+
+  const space = scenario.space("space")
+  const bob = await as(users.bob, roomPath(space.url, "general"))
+
+  const threadsNav = contentNavItem(bob, "Threads")
+
+  await expect(threadsNav).toBeVisible()
+  await expect(unreadDot(threadsNav)).toBeVisible()
+
+  await threadsNav.click()
+
+  const hers = bob.getByRole("row").filter({hasText: "the server is on fire"})
+  const his = bob.getByRole("row").filter({hasText: "where is the sextant"})
+
+  await expect(his).toBeVisible()
+
+  // syncChecked marks the landed-on page read 300ms later and latestActivityByPath is throttled to
+  // a second, so a dot the list is about to clear stays up well past the click. Nothing on screen
+  // reports the tick — the nav dot goes down on the route change either way — so wait it out.
+  await bob.waitForTimeout(1500)
+
+  await expect(unreadDot(hers)).toBeVisible()
+  await expect(unreadDot(his)).toHaveCount(0)
+
+  await hers.click()
+
+  await expect(bob.locator('[data-component="PageBar"]')).toContainText("the server is on fire")
+
+  // Leaving the list is what marks its threads read, so the dot is gone on the way back
+  await bob.goBack()
+
+  await expect(hers).toBeVisible()
+  await expect(unreadDot(hers)).toHaveCount(0)
+
+  await roomLink(bob, "General").click()
+
+  await expect(threadsNav).toBeVisible()
+  await expect(unreadDot(threadsNav)).toHaveCount(0)
+})
+
+test("US-113 see which threads are unread on a phone", async ({seed, as}) => {
+  const scenario = await seed(({relay, user, at}) => {
+    const space = relay("space")
+
+    space.room("general", {name: "General"})
+    space.join(user.alice, "general")
+    space.join(user.bob, "general")
+
+    seedThread(space, user.bob, "where is the sextant", at(3, HOUR))
+    seedThread(space, user.alice, "the server is on fire", at(2, HOUR))
+  })
+
+  const space = scenario.space("space")
+
+  // ThreadBoard swaps its table for a list of links below tailwind's md breakpoint, and the two
+  // branches render the thread separately, so a dot on one says nothing about the other.
+  const bob = await as(users.bob, `${spacePath(space.url)}/threads`, {
+    context: {viewport: {width: 390, height: 844}, hasTouch: true},
+  })
+
+  const hers = bob.getByRole("link").filter({hasText: "the server is on fire"})
+  const his = bob.getByRole("link").filter({hasText: "where is the sextant"})
+
+  await expect(his).toBeVisible()
+
+  // Same tick and throttle as US-112: a dot read before both have run is one the list may still be
+  // about to clear.
+  await bob.waitForTimeout(1500)
+
+  await expect(unreadDot(hers)).toBeVisible()
+  await expect(unreadDot(his)).toHaveCount(0)
+})

src/app/components/ThreadBoardItem.svelte

@@ -28,14 +28,19 @@
   const title = tagValue(tagSpec("title"), event.tags)
   const path = makeThreadPath(url, event.id)
   const onClick = () => goto(path)
-  //  notification={$notifications.has(path)}
 </script>
 
+{#snippet unread()}
+  {#if $notifications.has(path)}
+    <div class="mr-1 inline-block h-2 w-2 rounded-full bg-primary" transition:fade></div>
+  {/if}
+{/snippet}
+
 {#if mobile}
   <Link
     href={path}
     class="cv hover:bg-surface-less flex w-full flex-col gap-2 border-b border-solid border-line px-4 py-3 text-left text-sm transition-colors">
-    <p class="truncate font-medium">{title || "Untitled thread"}</p>
+    <p class="truncate font-medium">{@render unread()}{title || "Untitled thread"}</p>
     <div class="text-content-muted flex flex-wrap items-center gap-x-3 gap-y-1 text-xs">
       <span class="flex min-w-0 items-center gap-1.5">
         <ProfileCircle pubkey={event.pubkey} {url} size={4} />
@@ -52,10 +57,7 @@
     onclick={onClick}
     class="hover:bg-surface-less cursor-pointer border-b border-solid border-line text-sm transition-colors">
     <td class="max-w-0 truncate px-4 py-3 align-top">
-      {#if $notifications.has(path)}
-        <div class="h-2 w-2 rounded-full bg-primary inline-block mr-1" transition:fade></div>
-      {/if}
-      {title || "Untitled thread"}
+      {@render unread()}{title || "Untitled thread"}
     </td>
     <td class="w-32 px-4 py-3 align-middle">
       <div class="flex min-w-0 items-center gap-2">

src/app/notifications.ts

@@ -61,7 +61,7 @@ const getPaths = (path: string) =>
     .map((_, i, segments) => segments.slice(0, i + 1).join("/"))
     .slice(1)
 
-const getCheckedPaths = (pathname: string, relay?: string) => {
+const getExitPaths = (pathname: string, relay?: string) => {
   const paths = getPaths(pathname)
 
   if (relay) {
@@ -88,7 +88,7 @@ export const syncChecked = () => {
       return $checked
     })
 
-    const paths = getCheckedPaths($page.url.pathname, $page.params.relay)
+    const paths = getPaths($page.url.pathname)
 
     // Set checked when we visit a given page - but delay it a tad
     setTimeout(() => {
@@ -104,7 +104,7 @@ export const syncChecked = () => {
       })
     }, 300)
 
-    prev = paths
+    prev = getExitPaths($page.url.pathname, $page.params.relay)
   })
 }