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Add Expo kitchen sink example #25

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42 changes: 42 additions & 0 deletions examples/kitchen-sink/.gitignore
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# Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files

# dependencies
node_modules/
package-lock.json

# Expo
.expo/
dist/
web-build/
expo-env.d.ts

# Native
.kotlin/
*.orig.*
*.jks
*.p8
*.p12
*.key
*.mobileprovision

# Metro
.metro-health-check*

# debug
npm-debug.*
yarn-debug.*
yarn-error.*

# macOS
.DS_Store
*.pem

# local env files
.env*.local

# typescript
*.tsbuildinfo

# generated native folders
/ios
/android
41 changes: 41 additions & 0 deletions examples/kitchen-sink/app.json
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{
"expo": {
"name": "EasyMatrix SDK Lab",
"slug": "easymatrix-sdk-lab",
"version": "1.0.0",
"orientation": "portrait",
"icon": "./assets/icon.png",
"userInterfaceStyle": "light",
"splash": {
"image": "./assets/splash-icon.png",
"resizeMode": "contain",
"backgroundColor": "#ffffff"
},
"ios": {
"supportsTablet": true
},
"android": {
"adaptiveIcon": {
"backgroundColor": "#E6F4FE",
"foregroundImage": "./assets/android-icon-foreground.png",
"backgroundImage": "./assets/android-icon-background.png",
"monochromeImage": "./assets/android-icon-monochrome.png"
},
"predictiveBackGestureEnabled": false
},
"scheme": "easymatrix-sdk-lab",
"experiments": {
"typedRoutes": true
},
"web": {
"bundler": "metro",
"output": "static",
"favicon": "./assets/favicon.png"
},
"plugins": [
"expo-router",
"expo-secure-store",
"expo-sqlite"
]
}
}
23 changes: 23 additions & 0 deletions examples/kitchen-sink/app/(tabs)/_layout.tsx
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import { Tabs } from "expo-router";

export default function TabsLayout() {
return (
<Tabs
screenOptions={{
headerShown: false,
tabBarActiveTintColor: "#13212f",
tabBarInactiveTintColor: "#8c7c6d",
tabBarStyle: {
backgroundColor: "#fff8ef",
borderTopColor: "#ebdcc9",
},
}}
>
<Tabs.Screen name="index" options={{ title: "Inbox" }} />
<Tabs.Screen name="search" options={{ title: "Search" }} />
<Tabs.Screen name="lab" options={{ title: "Lab" }} />
<Tabs.Screen name="settings" options={{ title: "Settings" }} />
</Tabs>
);
}

162 changes: 162 additions & 0 deletions examples/kitchen-sink/app/(tabs)/index.tsx
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import { useEffect, useMemo, useState } from "react";
import { router } from "expo-router";
import { useQuery } from "@tanstack/react-query";
import { Pressable, Text, TextInput, View, useWindowDimensions } from "react-native";

import { ActiveProfileBanner } from "@/components/active-profile-banner";
import { ChatRow } from "@/components/chat-row";
import { EmptyState } from "@/components/empty-state";
import { ScreenShell } from "@/components/screen-shell";
import { SectionCard } from "@/components/section-card";
import { ThreadPanel } from "@/components/thread-panel";
import { useActiveProfile } from "@/hooks/use-active-profile";
import { useRealtimeTransport } from "@/hooks/use-realtime-transport";
import { chatsQueryOptions } from "@/lib/query/queries";

export default function InboxScreen() {
const { activeProfile } = useActiveProfile();
const transport = useRealtimeTransport(activeProfile, ["*"]);
const [filter, setFilter] = useState("");
const [selectedChatID, setSelectedChatID] = useState<string | null>(null);
const { width } = useWindowDimensions();
const wideLayout = width >= 1080;

const chatsQuery = useQuery(
activeProfile
? {
...chatsQueryOptions(activeProfile, { limit: 80 }),
enabled: Boolean(activeProfile.baseURL && activeProfile.accessToken),
refetchInterval: transport.mode === "polling" ? 15_000 : false,
}
: {
queryKey: ["profile", "none", "chats", { limit: 80 }],
queryFn: async () => [],
enabled: false,
},
);

const filteredChats = useMemo(() => {
const items = chatsQuery.data ?? [];
const token = filter.trim().toLowerCase();
if (!token) {
return items;
}
return items.filter(
(item) =>
item.title.toLowerCase().includes(token) ||
item.subtitle.toLowerCase().includes(token) ||
item.accountID.toLowerCase().includes(token),
);
}, [chatsQuery.data, filter]);

useEffect(() => {
if (wideLayout && !selectedChatID && filteredChats[0]?.id) {
setSelectedChatID(filteredChats[0].id);
}
}, [filteredChats, selectedChatID, wideLayout]);
Comment on lines +52 to +56
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@coderabbitai coderabbitai Bot Mar 8, 2026

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⚠️ Potential issue | 🟠 Major

Keep selectedChatID in sync with the visible list.

After a filter change or profile switch, selectedChatID can point at a chat that is no longer in filteredChats, so the wide layout keeps rendering a stale thread. Re-select the first visible chat or clear the selection when the current one drops out.

Suggested fix 
   useEffect(() => {
-    if (wideLayout && !selectedChatID && filteredChats[0]?.id) {
-      setSelectedChatID(filteredChats[0].id);
+    if (!wideLayout) {
+      return;
+    }
+
+    const firstVisibleChatID = filteredChats[0]?.id ?? null;
+    if (!firstVisibleChatID) {
+      if (selectedChatID !== null) {
+        setSelectedChatID(null);
+      }
+      return;
+    }
+
+    if (!selectedChatID || !filteredChats.some((chat) => chat.id === selectedChatID)) {
+      setSelectedChatID(firstVisibleChatID);
     }
   }, [filteredChats, selectedChatID, wideLayout]);
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
useEffect(() => {
if (wideLayout && !selectedChatID && filteredChats[0]?.id) {
setSelectedChatID(filteredChats[0].id);
}
}, [filteredChats, selectedChatID, wideLayout]);
useEffect(() => {
if (!wideLayout) {
return;
}
const firstVisibleChatID = filteredChats[0]?.id ?? null;
if (!firstVisibleChatID) {
if (selectedChatID !== null) {
setSelectedChatID(null);
}
return;
}
if (!selectedChatID || !filteredChats.some((chat) => chat.id === selectedChatID)) {
setSelectedChatID(firstVisibleChatID);
}
}, [filteredChats, selectedChatID, wideLayout]);
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@examples/kitchen-sink/app/`(tabs)/index.tsx around lines 52 - 56, The effect
that syncs selection to the visible list (useEffect referencing wideLayout,
selectedChatID, filteredChats, setSelectedChatID) must check whether
selectedChatID still exists in filteredChats and update accordingly: if
wideLayout is true and selectedChatID is missing from filteredChats,
setSelectedChatID to filteredChats[0]?.id (or undefined/null to clear if
filteredChats is empty); keep the existing behavior that picks the first visible
chat when there is no selection, but add the missing-membership check so the
wide layout never renders a stale thread.


return (
<ScreenShell
eyebrow="SDK Inbox"
title="Chat list and thread state"
description="This screen exercises `chats.list`, `messages.list`, and `messages.send` against the active Desktop API target."
>
{activeProfile ? <ActiveProfileBanner profile={activeProfile} transportMode={transport.mode} /> : null}

{!activeProfile ? (
<EmptyState title="No profile selected" description="Create a connection profile in Settings before loading chats." />
) : null}

{activeProfile && !activeProfile.accessToken ? (
<EmptyState title="Token missing" description="Save an access token in Settings to start querying chats and messages." />
) : null}

{activeProfile ? (
<SectionCard
title="Inbox"
description="The list is cached per profile and invalidated from websocket events or polling."
>
<TextInput
placeholder="Filter loaded chats"
value={filter}
onChangeText={setFilter}
style={{
padding: 14,
borderRadius: 16,
backgroundColor: "#fff",
borderWidth: 1,
borderColor: "#dfd1bc",
}}
/>

{chatsQuery.isPending ? (
<EmptyState title="Loading chats" description="Fetching the latest conversation list." />
) : null}

{chatsQuery.isError ? (
<EmptyState
title="Inbox failed to load"
description={chatsQuery.error instanceof Error ? chatsQuery.error.message : "Unknown inbox error"}
/>
) : null}

{!wideLayout && filteredChats.length > 0 ? (
<View style={{ gap: 10 }}>
{filteredChats.map((chat) => (
<ChatRow
key={chat.id}
chat={chat}
selected={false}
onPress={() => router.push({ pathname: "/chat/[chatID]", params: { chatID: chat.id } })}
/>
))}
</View>
) : null}

{wideLayout ? (
<View style={{ flexDirection: "row", gap: 16, alignItems: "stretch" }}>
<View style={{ flex: 0.95, gap: 10 }}>
{filteredChats.map((chat) => (
<ChatRow
key={chat.id}
chat={chat}
selected={chat.id === selectedChatID}
onPress={() => setSelectedChatID(chat.id)}
/>
))}
</View>
<View style={{ flex: 1.25 }}>
{selectedChatID ? (
<ThreadPanel chatID={selectedChatID} profile={activeProfile} transportMode={transport.mode} />
) : (
<EmptyState title="Pick a chat" description="Select one of the loaded chats to render the thread panel." />
)}
</View>
</View>
) : null}

{!chatsQuery.isPending && filteredChats.length === 0 ? (
<EmptyState title="No chats matched" description="Try another filter or verify the current profile against `/v1/info` in Lab or Settings." />
) : null}
</SectionCard>
) : null}

{wideLayout ? null : (
<Pressable
onPress={() => router.push({ pathname: "/settings" })}
style={{
paddingVertical: 14,
paddingHorizontal: 18,
borderRadius: 18,
backgroundColor: "#efe4d5",
alignSelf: "flex-start",
}}
>
<Text selectable style={{ color: "#583d28", fontWeight: "700" }}>
Open Settings
</Text>
</Pressable>
)}
</ScreenShell>
);
}
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