Implement an AI Advisor (#125)

This pull request introduces several significant changes, including the
addition of a new AI advisor feature, updates to the rewards page, and
enhancements to the messaging system. The most important changes are
summarized below:

### AI Advisor Feature:
* Added a new `AdvisorChatbot` component that allows users to interact
with an AI advisor. This includes setting up the chat interface,
handling message sending, and displaying messages.
(`app/(tabs)/ai-advisor.tsx`)
* Updated `TabLayout` to include the new AI advisor tab with an
appropriate icon. (`app/(tabs)/_layout.tsx`)
[[1]](diffhunk://#diff-ea7f70dea9b63c4fcf80ad308f46fc316bfd05e41531a2a44dd56e1ea215a637R7)
[[2]](diffhunk://#diff-ea7f70dea9b63c4fcf80ad308f46fc316bfd05e41531a2a44dd56e1ea215a637R87-R98)

### Rewards Page Enhancements:
* Refactored the rewards page to fetch and display rewards dynamically,
including a search functionality to filter rewards.
(`app/(tabs)/rewards.tsx`)
[[1]](diffhunk://#diff-c35e1e058777e8b7e00c54546afb9a15451de31415bb33b3e65497322ecc17ebL1-R42)
[[2]](diffhunk://#diff-c35e1e058777e8b7e00c54546afb9a15451de31415bb33b3e65497322ecc17ebL33-L149)
* Updated the single reward page to fetch reward details dynamically and
display additional information such as images and legal disclosures.
(`app/rewards/[id].tsx`)
([app/rewards/[id].tsxL1-R98](diffhunk://#diff-e9cb913d6859fe44b83b3a2f5065f76164b17d5beda8c9a8e010218dfba95a4fL1-R98))

### Messaging System Improvements:
* Added new queries and mutations for handling messages, including
fetching messages by thread ID and sending messages.
(`convex/messages.ts`)
* Updated the schema to include new tables for messages and threads,
with appropriate indexing. (`convex/schema.ts`)

### UI and Styling Updates:
* Introduced a new CSS file for styling the reward descriptions and
links. (`app/rewards/dom-content.css`)
* Enhanced the `Input` component to use a consistent font family across
the application. (`components/ui/input.tsx`)
[[1]](diffhunk://#diff-c2f62fb0cb5e2955363d1c27d9cb0b33d03fed2193d16c3877af492d82770d2cR3)
[[2]](diffhunk://#diff-c2f62fb0cb5e2955363d1c27d9cb0b33d03fed2193d16c3877af492d82770d2cR12-R14)

These changes collectively improve the functionality and user experience
of the application, particularly with the introduction of the AI advisor
and the dynamic handling of rewards.- **add Bot icon**

app/(tabs)/_layout.tsx

@@ -4,6 +4,7 @@ import { User } from "~/lib/icons/User";
 import { Goal, Mountain, TrendingUp } from "lucide-react-native";
 import { fontFamily } from "~/lib/font";
 import { Star } from "~/lib/icons/Star";
+import { Bot } from "~/lib/icons/Bot";
 
 export default function TabLayout() {
   return (
@@ -83,6 +84,18 @@ export default function TabLayout() {
             ),
           }}
         />
+        <Tabs.Screen
+          name="ai-advisor"
+          options={{
+            title: "Advisor",
+            headerShown: false,
+            tabBarIcon: ({ color }) => (
+              <View style={{ alignItems: "center" }}>
+                <Bot color={color} />
+              </View>
+            ),
+          }}
+        />
       </Tabs>
     </>
   );

app/(tabs)/ai-advisor.tsx

@@ -0,0 +1,100 @@
+import { SafeAreaView } from "react-native-safe-area-context";
+// import AsyncStorage from "@react-native-async-storage/async-storage";
+
+import { useState, useRef, useMemo } from "react";
+import { View, KeyboardAvoidingView, Platform, FlatList } from "react-native";
+import { Text } from "~/components/ui/text";
+import { Button } from "~/components/ui/button";
+import { useMutation, useQuery } from "convex/react";
+import { api } from "~/convex/_generated/api";
+import { cn } from "~/lib/utils";
+import { Send } from "~/lib/icons/Send";
+import { Input } from "~/components/ui/input";
+import { Separator } from "~/components/ui/separator";
+
+export default function AdvisorChatbot() {
+  const thread = useQuery(api.threads.getThread);
+  const remoteMessages = useQuery(api.messages.getMessages, {
+    threadId: thread?.threadId,
+  });
+  const sendMessage = useMutation(api.messages.sendMessage);
+
+  const messages = useMemo(
+    () =>
+      [
+        {
+          role: "assistant",
+          content:
+            "Hey there, I'm your personal AI Advisor. What can I help you with?",
+          threadId: "",
+        },
+      ].concat(remoteMessages ?? []),
+    [remoteMessages]
+  );
+
+  const [inputText, setInputText] = useState("");
+  const flatListRef = useRef<FlatList>(null);
+
+  const handleSend = async () => {
+    if (!inputText) {
+      return;
+    }
+    await sendMessage({ threadId: thread?.threadId, message: inputText });
+    setInputText("");
+  };
+
+  return (
+    <SafeAreaView
+      style={{ flex: 1, backgroundColor: "#082139" }}
+      edges={["top", "left", "right"]}
+    >
+      <KeyboardAvoidingView
+        behavior={Platform.OS === "ios" ? "padding" : "height"}
+        className="flex-1"
+      >
+        <FlatList
+          ref={flatListRef}
+          data={messages}
+          onContentSizeChange={() => {
+            if (flatListRef.current) {
+              flatListRef.current.scrollToEnd({ animated: true });
+            }
+          }}
+          renderItem={({ item }) => (
+            <MessageComp isViewer={item.role === "user"} text={item.content} />
+          )}
+          ItemSeparatorComponent={() => <Separator />}
+        />
+
+        <View className="relative flex-row items-center justify-between bg-card">
+          <Input
+            className="native:h-20 flex-1 rounded-none border-0 bg-card py-6 placeholder:text-muted-foreground"
+            value={inputText}
+            onChangeText={setInputText}
+            placeholder="Send a message..."
+            multiline
+          />
+          <Button variant="ghost" hitSlop={20} onPress={handleSend}>
+            <Send className="text-white" />
+          </Button>
+        </View>
+      </KeyboardAvoidingView>
+    </SafeAreaView>
+  );
+}
+
+function MessageComp({ text, isViewer }: { text: string; isViewer: boolean }) {
+  return (
+    <View className={cn("gap-3 p-4", isViewer && "bg-card")}>
+      <Text className={cn(!isViewer && "font-semibold")}>{text}</Text>
+      <Text
+        className={cn(
+          "text-sm font-light text-muted-foreground",
+          isViewer && "text-right"
+        )}
+      >
+        {isViewer ? "You" : "LT AI Advisor"}
+      </Text>
+    </View>
+  );
+}

app/(tabs)/rewards.tsx

@@ -1,151 +1,114 @@
-import { ActivityIndicator, FlatList, Pressable, View } from "react-native";
-import type { LucideIcon } from "lucide-react-native";
+import {
+  FlatList,
+  Pressable,
+  View,
+  Image,
+  ActivityIndicator,
+} from "react-native";
 import { SafeAreaView } from "react-native-safe-area-context";
 
-import { Link } from "expo-router";
+import { Link, useLocalSearchParams } from "expo-router";
 import { Text } from "~/components/ui/text";
 import SearchInput from "~/components/search-input";
 import { Coins } from "~/lib/icons/Coins";
-import { HandHeart } from "~/lib/icons/HandHeart";
-import { Gift } from "~/lib/icons/Gift";
-import { TentTree } from "~/lib/icons/TentTree";
 import { api } from "~/convex/_generated/api";
-import { useQuery } from "convex/react";
+import { useAction, useQuery } from "convex/react";
+import { useEffect, useState } from "react";
+import type { ListProductsResponseProductsInner } from "tremendous";
+import { MaterialIcons } from "@expo/vector-icons";
 
 export default function RewardsPage() {
+  const [rewards, setRewards] = useState<
+    ListProductsResponseProductsInner[] | null
+  >(null);
+  const { query } = useLocalSearchParams<{ query?: string }>();
   const user = useQuery(api.users.currentUser);
+  const fetchRewards = useAction(api.tremendous.listRewardsAction);
+
+  useEffect(() => {
+    fetchRewards().then((products) => setRewards(products));
+  }, [fetchRewards]);
+
+  const filteredRewards = rewards
+    ? query
+      ? rewards.filter((reward) =>
+          reward.name.toLowerCase().includes(query.toLowerCase())
+        )
+      : rewards
+    : null;
+
   return (
     <SafeAreaView style={{ flex: 1, backgroundColor: "#082139" }}>
-      {user ? (
-        <View>
-          <View className="gap-10 p-4">
-            <View className="flex flex-row items-center gap-4">
-              <Text>
-                <Coins className="text-primary" size={40} />
-              </Text>
-              <View className="gap-2">
-                <Text className="text-2xl font-bold">{user?.points ?? 0}</Text>
-                <Text className="text-md">LT Token Balance</Text>
-              </View>
-            </View>
-            <View className="gap-3">
-              <Text className="text-2xl font-semibold">Available Rewards</Text>
-              <SearchInput />
-            </View>
+      <View className="gap-10 bg-background p-4">
+        <View className="flex flex-row items-center gap-4">
+          <Text>
+            <Coins className="text-primary" size={40} />
+          </Text>
+          <View className="gap-2">
+            <Text className="text-2xl font-bold">{user?.points ?? 0}</Text>
+            <Text className="text-md">LT Token Balance</Text>
           </View>
-          <FlatList
-            contentContainerStyle={{
-              paddingBottom: 208,
-            }}
-            data={rewardData}
-            ItemSeparatorComponent={() => <View className="py-2" />}
-            ListFooterComponent={() => (
-              <Text className="my-5 text-center text-sm">End of Rewards</Text>
-            )}
-            renderItem={({ item }) => (
-              <RewardItem
-                id={item.id}
-                Icon={item.icon}
-                type={item.type}
-                token={item.token}
-                name={item.name}
-                description={item.description}
-              />
-            )}
-          />
         </View>
+        <View className="gap-3">
+          <Text className="text-2xl font-semibold">Available Rewards</Text>
+          <SearchInput query={query} />
+        </View>
+      </View>
+      {filteredRewards ? (
+        <FlatList
+          data={filteredRewards}
+          ItemSeparatorComponent={() => <View className="py-2" />}
+          renderItem={({ item }) => <RewardItem product={item} />}
+        />
       ) : (
-        <View className="flex-1 bg-background">
+        <View className="h-full flex-1 items-center justify-center bg-background">
           <ActivityIndicator />
         </View>
       )}
     </SafeAreaView>
   );
 }
 
-export const rewardData = [
-  {
-    id: "0",
-    icon: HandHeart,
-    type: "Charitable donation",
-    token: 30,
-    name: "Reward Name",
-    description: "This is a short description for this reward",
-  },
-  {
-    id: "1",
-    icon: Gift,
-    type: "Gift card",
-    token: 20,
-    name: "Reward Name",
-    description: "This is a short description for this reward",
-  },
-  {
-    id: "2",
-    icon: TentTree,
-    type: "Experience",
-    token: 50,
-    name: "Reward Name",
-    description: "This is a short description for this reward",
-  },
-  {
-    id: "3",
-    icon: TentTree,
-    type: "Experience",
-    token: 40,
-    name: "Reward Name",
-    description: "This is a short description for this reward",
-  },
-  {
-    id: "4",
-    icon: Gift,
-    type: "Gift card",
-    token: 60,
-    name: "Reward Name",
-    description: "This is a short description for this reward",
-  },
-];
+interface RewardItemProps {
+  product: ListProductsResponseProductsInner;
+}
 
-function RewardItem({
-  id,
-  Icon,
-  type,
-  token,
-  name,
-  description,
-}: {
-  id: string;
-  Icon: LucideIcon;
-  type: string;
-  token: number;
-  name: string;
-  description: string;
-}) {
+function RewardItem({ product }: RewardItemProps) {
   return (
     <Link
       href={{
         pathname: "/rewards/[id]",
-        params: { id },
+        params: { id: product.id },
       }}
       asChild
     >
       <Pressable>
-        <View className="justify-between bg-[#0e2942] px-6 py-5">
-          <View className="flex flex-row justify-between">
-            <View className="flex flex-row items-center gap-2">
-              <View className="rounded-lg bg-white/20 p-1 backdrop-blur-sm">
-                <Icon className="text-foreground" />
-              </View>
-              <Text>{type}</Text>
-            </View>
-            <Text className="font-medium">{token} tokens</Text>
-          </View>
-          <View className="gap-1">
-            <Text className="text-xl font-semibold">{name}</Text>
-            <Text className="line-clamp-2 overflow-ellipsis">
-              {description}
-            </Text>
+        <View className="relative">
+          <View className="absolute h-full w-full bg-[#0e2942]/50"></View>
+          {!!product.images.length && (
+            <Image
+              src={product.images.at(0)?.src}
+              className="-z-10 h-[200px] w-full"
+            />
+          )}
+
+          <View className="absolute flex flex-row items-center gap-2 pl-4 pt-4">
+            {product.category === "merchant_card" && (
+              <>
+                <View className="rounded-lg bg-slate-500 p-1">
+                  <MaterialIcons
+                    name="card-giftcard"
+                    size={20}
+                    color={"white"}
+                  />
+                </View>
+                <Text>Gift Card</Text>
+              </>
+            )}
           </View>
+          <Text className="absolute bottom-0 pb-4 pl-4 text-xl font-semibold">
+            {product.name}
+          </Text>
         </View>
       </Pressable>
     </Link>