refactor: client api

client/src/Agents.tsx

@@ -1,23 +1,11 @@
-import { useQuery } from "@tanstack/react-query";
 import { Button } from "@/components/ui/button";
 import { useNavigate } from "react-router-dom";
+import { useGetAgentsQuery } from "@/api";
 import "./App.css";
 
-type Agent = {
-    id: string;
-    name: string;
-};
-
 function Agents() {
     const navigate = useNavigate();
-    const { data: agents, isLoading } = useQuery({
-        queryKey: ["agents"],
-        queryFn: async () => {
-            const res = await fetch("/api/agents");
-            const data = await res.json();
-            return data.agents as Agent[];
-        },
-    });
+    const { data: agents, isLoading } = useGetAgentsQuery()
 
     return (
         <div className="min-h-screen flex flex-col items-center justify-center p-4">

client/src/Chat.tsx

@@ -1,24 +1,20 @@
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { useMutation } from "@tanstack/react-query";
+import type { TextResponse } from "@/api";
+import { useSendMessageMutation } from "@/api";
 import { ImageIcon } from "lucide-react";
 import { useEffect, useRef, useState } from "react";
 import { useParams } from "react-router-dom";
 import "./App.css";
 
-type TextResponse = {
-    text: string;
-    user: string;
-    attachments?: { url: string; contentType: string; title: string }[];
-};
-
 export default function Chat() {
     const { agentId } = useParams();
     const [input, setInput] = useState("");
     const [messages, setMessages] = useState<TextResponse[]>([]);
     const [selectedFile, setSelectedFile] = useState<File | null>(null);
     const fileInputRef = useRef<HTMLInputElement>(null);
     const messagesEndRef = useRef<HTMLDivElement>(null);
+    const { mutate: sendMessage, isPending } = useSendMessageMutation({ setMessages, setSelectedFile });
 
     const scrollToBottom = () => {
         messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
@@ -28,32 +24,9 @@ export default function Chat() {
         scrollToBottom();
     }, [messages]);
 
-    const mutation = useMutation({
-        mutationFn: async (text: string) => {
-            const formData = new FormData();
-            formData.append("text", text);
-            formData.append("userId", "user");
-            formData.append("roomId", `default-room-${agentId}`);
-
-            if (selectedFile) {
-                formData.append("file", selectedFile);
-            }
-
-            const res = await fetch(`/api/${agentId}/message`, {
-                method: "POST",
-                body: formData,
-            });
-            return res.json() as Promise<TextResponse[]>;
-        },
-        onSuccess: (data) => {
-            setMessages((prev) => [...prev, ...data]);
-            setSelectedFile(null);
-        },
-    });
-
     const handleSubmit = async (e: React.FormEvent) => {
         e.preventDefault();
-        if (!input.trim() && !selectedFile) return;
+        if ((!input.trim() && !selectedFile) || !agentId) return;
 
         // Add user message immediately to state
         const userMessage: TextResponse = {
@@ -63,7 +36,7 @@ export default function Chat() {
         };
         setMessages((prev) => [...prev, userMessage]);
 
-        mutation.mutate(input);
+        sendMessage({ text: input, agentId, selectedFile });
         setInput("");
     };
 
@@ -142,19 +115,19 @@ export default function Chat() {
                             onChange={(e) => setInput(e.target.value)}
                             placeholder="Type a message..."
                             className="flex-1"
-                            disabled={mutation.isPending}
+                            disabled={isPending}
                         />
                         <Button
                             type="button"
                             variant="outline"
                             size="icon"
                             onClick={handleFileSelect}
-                            disabled={mutation.isPending}
+                            disabled={isPending}
                         >
                             <ImageIcon className="h-4 w-4" />
                         </Button>
-                        <Button type="submit" disabled={mutation.isPending}>
-                            {mutation.isPending ? "..." : "Send"}
+                        <Button type="submit" disabled={isPending}>
+                            {isPending ? "..." : "Send"}
                         </Button>
                     </form>
                     {selectedFile && (

client/src/api/index.ts

@@ -0,0 +1,2 @@
+export * from "./mutations";
+export * from "./queries";

client/src/api/mutations/index.ts

@@ -0,0 +1 @@
+export * from "./sendMessageMutation";

client/src/api/mutations/sendMessageMutation.ts

@@ -0,0 +1,60 @@
+import type { CustomMutationResult } from "../types";
+
+import { useMutation } from "@tanstack/react-query";
+import { ROUTES } from "../routes";
+import { SetStateAction } from "react";
+
+export type TextResponse = {
+    text: string;
+    user: string;
+    attachments?: { url: string; contentType: string; title: string }[];
+};
+
+type SendMessageMutationProps = {
+    text: string;
+    agentId: string;
+    selectedFile: File | null;
+};
+
+type Props = Required<{
+    setMessages: (value: SetStateAction<TextResponse[]>) => void;
+    setSelectedFile: (value: SetStateAction<File | null>) => void;
+}>;
+
+export const useSendMessageMutation = ({
+    setMessages,
+    setSelectedFile,
+}: Props): CustomMutationResult<TextResponse[], SendMessageMutationProps> => {
+    const mutation = useMutation({
+        mutationFn: async ({
+            text,
+            agentId,
+            selectedFile,
+        }: SendMessageMutationProps) => {
+            const formData = new FormData();
+            formData.append("text", text);
+            formData.append("userId", "user");
+            formData.append("roomId", `default-room-${agentId}`);
+
+            if (selectedFile) {
+                formData.append("file", selectedFile);
+            }
+
+            const res = await fetch(ROUTES.sendMessage(agentId), {
+                method: "POST",
+                body: formData,
+            });
+
+            return res.json() as Promise<TextResponse[]>;
+        },
+        onSuccess: (data) => {
+            setMessages((prev) => [...prev, ...data]);
+            setSelectedFile(null);
+        },
+        onError: (error) => {
+            console.error("[useSendMessageMutation]:", error);
+        },
+    });
+
+    return mutation;
+};

client/src/api/queries/index.ts

@@ -0,0 +1 @@
+export * from "./useGetAgentsQuery";

client/src/api/queries/queries.ts

@@ -0,0 +1,3 @@
+export enum Queries {
+    AGENTS = "agents",
+}

client/src/api/queries/useGetAgentsQuery.ts

@@ -0,0 +1,23 @@
+import { useQuery } from "@tanstack/react-query";
+import type { CustomQueryResult } from "../types";
+import { Queries } from "./queries";
+import { ROUTES } from "../routes";
+
+export type Agent = {
+    id: string;
+    name: string;
+};
+
+export const useGetAgentsQuery = (): CustomQueryResult<Agent[] | undefined> => {
+    return useQuery({
+        queryKey: [Queries.AGENTS],
+        queryFn: async () => {
+            const res = await fetch(ROUTES.getAgents());
+            const data = await res.json();
+            return data.agents as Agent[];
+        },
+        retry: (failureCount) => failureCount < 3,
+        staleTime: 5 * 60 * 1000, // 5 minutes
+        refetchOnWindowFocus: false,
+    });
+};

client/src/api/routes.ts

@@ -0,0 +1,4 @@
+export const ROUTES = {
+    sendMessage: (agentId: string): string => `/api/${agentId}/message`,
+    getAgents: (): string => `/api/agents`,
+};

client/src/api/types.ts

@@ -0,0 +1,13 @@
+import type { UseMutationResult, UseQueryResult } from "@tanstack/react-query";
+
+export type CustomMutationResult<TData, TArgs = unknown> = UseMutationResult<
+    TData,
+    Error,
+    TArgs,
+    unknown
+>;
+
+export type CustomQueryResult<TData, TArgs = unknown> = Omit<
+    UseQueryResult<TData, TArgs>,
+    "data" | "refetch" | "promise"
+> & { data: TData; refetch: () => void; promise: unknown };

client/src/components/app-sidebar.tsx

@@ -1,4 +1,4 @@
-import { Calendar, Home, Inbox, Search, Settings } from "lucide-react";
+import { Calendar, Inbox } from "lucide-react";
 import { useParams } from "react-router-dom";
 import { ThemeToggle } from "@/components/theme-toggle";