Add Translate and Live Notepad #29
Conversation
WalkthroughThe changes introduce automatic message translation and live collaborative document editing to the chat application. Backend modifications add translation logic and a new field for translated text, while frontend updates enable users to toggle translation preferences and collaborate on live documents via sockets. Supporting state management and UI controls are implemented throughout. Changes
Sequence Diagram(s)1. Message Sending with Auto-TranslationsequenceDiagram
participant User
participant Frontend
participant Backend
participant GoogleTranslateAPI
User->>Frontend: Submit message (text, autoTranslate)
Frontend->>Backend: sendMessage({text, autoTranslate})
alt autoTranslate is true and text present
Backend->>GoogleTranslateAPI: translateText(text, 'en')
GoogleTranslateAPI-->>Backend: translatedText
Backend->>Backend: Save message with text and translatedText
else autoTranslate is false
Backend->>Backend: Save message with text only
end
Backend-->>Frontend: Message confirmation / update
2. Live Collaborative Document EditingsequenceDiagram
participant UserA
participant FrontendA
participant Backend
participant FrontendB
participant UserB
UserA->>FrontendA: Edit live document
FrontendA->>Backend: emit("liveDocUpdate", {to: UserB, content})
Backend->>FrontendB: emit("liveDocUpdate", {from: UserA, content})
FrontendB->>UserB: Update live document content
Poem
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Actionable comments posted: 6
🧹 Nitpick comments (1)
frontend/src/components/ChatContainer.jsx (1)
119-127: Consider optimizing the textarea onChange handler.The onChange handler creates a new function on every render. For better performance during rapid typing, consider memoizing it.
Add at the top of the component:
const handleDocChange = useCallback((e) => { const newContent = e.target.value; setLiveDocContent(newContent); sendLiveDocUpdate(newContent); }, [setLiveDocContent, sendLiveDocUpdate]);Then use it in the textarea:
<textarea className="textarea textarea-bordered w-full min-h-[150px]" placeholder="Start collaborating here..." value={liveDocContent} - onChange={(e) => { - setLiveDocContent(e.target.value); - sendLiveDocUpdate(e.target.value); - }} + onChange={handleDocChange} />
📜 Review details
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⛔ Files ignored due to path filters (1)
backend/package-lock.jsonis excluded by!**/package-lock.json
📒 Files selected for processing (10)
backend/package.json(1 hunks)backend/src/controllers/message.controller.js(3 hunks)backend/src/lib/socket.js(1 hunks)backend/src/lib/translate.js(1 hunks)backend/src/models/message.model.js(1 hunks)frontend/src/components/ChatContainer.jsx(4 hunks)frontend/src/components/MessageInput.jsx(2 hunks)frontend/src/pages/SettingsPage.jsx(3 hunks)frontend/src/store/useChatStore.js(1 hunks)frontend/src/store/usePreferenceStore.js(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (3)
frontend/src/components/MessageInput.jsx (2)
frontend/src/store/useChatStore.js (2)
useChatStore(6-92)useChatStore(6-92)frontend/src/store/usePreferenceStore.js (2)
usePreferenceStore(3-13)usePreferenceStore(3-13)
frontend/src/pages/SettingsPage.jsx (2)
frontend/src/components/MessageInput.jsx (1)
usePreferenceStore(13-13)frontend/src/store/usePreferenceStore.js (2)
usePreferenceStore(3-13)usePreferenceStore(3-13)
frontend/src/store/usePreferenceStore.js (2)
frontend/src/pages/SettingsPage.jsx (1)
usePreferenceStore(15-15)frontend/src/components/MessageInput.jsx (1)
usePreferenceStore(13-13)
🔇 Additional comments (7)
backend/package.json (1)
15-15: Dependency versions and security status verifiedBoth newly added dependencies in backend/package.json are at their latest stable releases with no known security vulnerabilities:
- backend/package.json lines 15 (
axios@^1.10.0): matches latest v1.10.0 (2025-06-14), no reported vulnerabilities.- backend/package.json lines 22 (
google-translate-api-x@^10.7.2): matches latest v10.7.2 (2024-12-20), no reported vulnerabilities.No further action required.
backend/src/lib/socket.js (1)
36-44: LGTM! Well-implemented live document collaboration.The socket handler correctly:
- Retrieves the recipient's socket ID from the user mapping
- Checks for recipient availability before forwarding
- Includes both sender ID and content in the forwarded message
- Enables real-time peer-to-peer document collaboration
frontend/src/components/MessageInput.jsx (2)
5-5: LGTM! Clean integration of auto-translate preference.The import and usage of the preference store follows established patterns and cleanly integrates the auto-translate functionality.
Also applies to: 13-13
43-43: LGTM! Proper passing of auto-translate flag to backend.The
autoTranslateflag is correctly included in the message payload, enabling the backend to conditionally perform translation.backend/src/models/message.model.js (1)
18-20: LGTM! Appropriate schema extension for translation feature.The optional
translatedTextfield is correctly added to support storing translated message content without affecting existing messages.frontend/src/store/usePreferenceStore.js (1)
1-13: Well-implemented preference store with proper persistence.The Zustand store correctly handles localStorage persistence with proper JSON serialization and null checking. Good choice of default value for autoTranslate.
frontend/src/components/ChatContainer.jsx (1)
93-97: Good implementation of translated text display.The conditional rendering properly checks for both existence and difference from the original text, preventing redundant display. The styling clearly differentiates the translation from the original message.
| export async function translateText(text, targetLang = 'en') { | ||
| try { | ||
| const res = await translate(text, { to: targetLang }); | ||
| console.log("✅ Google Translate result:", res.text); | ||
| return res.text; | ||
| } catch (error) { | ||
| console.error("❌ Translation error:", error.message); | ||
| return null; | ||
| } | ||
| } |
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🛠️ Refactor suggestion
Enhance robustness and production readiness of the translation function.
The function works but could benefit from several improvements:
- Input validation - Check for empty/null text
- Rate limiting - Google Translate API has usage limits
- Logging optimization - Console logs should be configurable for production
- Text length limits - Very long text might cause API issues
Consider this enhanced version:
-export async function translateText(text, targetLang = 'en') {
+export async function translateText(text, targetLang = 'en') {
+ if (!text || typeof text !== 'string' || text.trim().length === 0) {
+ return null;
+ }
+
+ // Limit text length to prevent API issues
+ if (text.length > 5000) {
+ text = text.substring(0, 5000);
+ }
+
try {
const res = await translate(text, { to: targetLang });
- console.log("✅ Google Translate result:", res.text);
+ if (process.env.NODE_ENV === 'development') {
+ console.log("✅ Google Translate result:", res.text);
+ }
return res.text;
} catch (error) {
- console.error("❌ Translation error:", error.message);
+ console.error("❌ Translation error:", error.message);
return null;
}
}📝 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.
| export async function translateText(text, targetLang = 'en') { | |
| try { | |
| const res = await translate(text, { to: targetLang }); | |
| console.log("✅ Google Translate result:", res.text); | |
| return res.text; | |
| } catch (error) { | |
| console.error("❌ Translation error:", error.message); | |
| return null; | |
| } | |
| } | |
| export async function translateText(text, targetLang = 'en') { | |
| // Input validation: reject empty or non-string text | |
| if (!text || typeof text !== 'string' || text.trim().length === 0) { | |
| return null; | |
| } | |
| // Limit text length to prevent API issues | |
| if (text.length > 5000) { | |
| text = text.substring(0, 5000); | |
| } | |
| try { | |
| const res = await translate(text, { to: targetLang }); | |
| // Only log in development to avoid verbose output in production | |
| if (process.env.NODE_ENV === 'development') { | |
| console.log("✅ Google Translate result:", res.text); | |
| } | |
| return res.text; | |
| } catch (error) { | |
| console.error("❌ Translation error:", error.message); | |
| return null; | |
| } | |
| } |
🤖 Prompt for AI Agents
In backend/src/lib/translate.js around lines 3 to 12, improve the translateText
function by adding input validation to return early or throw an error if the
input text is empty or null. Implement rate limiting to avoid exceeding Google
Translate API usage limits, such as using a token bucket or delay mechanism.
Replace console.log and console.error with a configurable logging system that
can be enabled or disabled based on environment or log level. Also, add a check
to limit the length of the input text to a safe maximum before calling the API
to prevent failures with very long texts.
| useEffect(() => { | ||
| initPreference(); | ||
| }, []); |
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🛠️ Refactor suggestion
Add initPreference to the useEffect dependency array.
The useEffect hook should include initPreference in its dependency array to follow React best practices and avoid potential ESLint warnings.
useEffect(() => {
initPreference();
- }, []);
+ }, [initPreference]);📝 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.
| useEffect(() => { | |
| initPreference(); | |
| }, []); | |
| useEffect(() => { | |
| initPreference(); | |
| }, [initPreference]); |
🤖 Prompt for AI Agents
In frontend/src/pages/SettingsPage.jsx around lines 17 to 19, the useEffect hook
calls initPreference but does not include it in the dependency array. To fix
this, add initPreference to the dependency array of useEffect to comply with
React best practices and prevent ESLint warnings.
| let translatedText = null; | ||
| if (text && autoTranslate) { | ||
| translatedText = await translateText(text, "en"); | ||
| } |
There was a problem hiding this comment.
Add error handling for translation to prevent message sending failures.
The translation API call could fail and block the entire message from being sent. Wrap it in a try-catch to make translation a best-effort feature.
let translatedText = null;
if (text && autoTranslate) {
- translatedText = await translateText(text, "en");
+ try {
+ translatedText = await translateText(text, "en");
+ } catch (error) {
+ console.error("Translation failed:", error.message);
+ // Continue without translation
+ }
}📝 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.
| let translatedText = null; | |
| if (text && autoTranslate) { | |
| translatedText = await translateText(text, "en"); | |
| } | |
| let translatedText = null; | |
| if (text && autoTranslate) { | |
| try { | |
| translatedText = await translateText(text, "en"); | |
| } catch (error) { | |
| console.error("Translation failed:", error.message); | |
| // Continue without translation | |
| } | |
| } |
🤖 Prompt for AI Agents
In backend/src/controllers/message.controller.js around lines 53 to 56, the
translation API call is not wrapped in error handling, which can cause the
entire message sending process to fail if translation fails. Wrap the await
translateText call inside a try-catch block to catch any errors during
translation, log or handle the error appropriately, and allow the message
sending to proceed regardless of translation success.
| initLiveDocSocket: () => { | ||
| const socket = useAuthStore.getState().socket; | ||
| const { selectedUser } = get(); | ||
|
|
||
| socket.on("liveDocUpdate", (data) => { | ||
| if (data.from === selectedUser._id) { | ||
| set({ liveDocContent: data.content }); | ||
| } | ||
| }); | ||
| }, |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add cleanup method for live document socket listener.
The socket listener should be cleaned up when switching users or unmounting to prevent memory leaks and duplicate listeners.
Add a cleanup method:
cleanupLiveDocSocket: () => {
const socket = useAuthStore.getState().socket;
socket.off("liveDocUpdate");
},Call this method when appropriate (e.g., when selectedUser changes or component unmounts).
🤖 Prompt for AI Agents
In frontend/src/store/useChatStore.js around lines 72 to 81, the liveDocUpdate
socket listener is added but never removed, which can cause memory leaks and
duplicate event handling. Add a cleanupLiveDocSocket method that calls
socket.off("liveDocUpdate") to remove the listener. Ensure this cleanup method
is called whenever the selectedUser changes or when the component using this
store unmounts to properly manage the socket event listeners.
Fix potential stale closure issue with selectedUser in socket listener.
The socket listener captures selectedUser at initialization time. If the user switches to chat with someone else, the listener will still filter based on the old selectedUser value.
initLiveDocSocket: () => {
const socket = useAuthStore.getState().socket;
- const { selectedUser } = get();
socket.on("liveDocUpdate", (data) => {
+ const { selectedUser } = get();
if (data.from === selectedUser._id) {
set({ liveDocContent: data.content });
}
});
},📝 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.
| initLiveDocSocket: () => { | |
| const socket = useAuthStore.getState().socket; | |
| const { selectedUser } = get(); | |
| socket.on("liveDocUpdate", (data) => { | |
| if (data.from === selectedUser._id) { | |
| set({ liveDocContent: data.content }); | |
| } | |
| }); | |
| }, | |
| initLiveDocSocket: () => { | |
| const socket = useAuthStore.getState().socket; | |
| socket.on("liveDocUpdate", (data) => { | |
| const { selectedUser } = get(); | |
| if (data.from === selectedUser._id) { | |
| set({ liveDocContent: data.content }); | |
| } | |
| }); | |
| }, |
🤖 Prompt for AI Agents
In frontend/src/store/useChatStore.js around lines 72 to 81, the socket listener
uses a stale closure over selectedUser, causing it to filter events based on the
initial selectedUser instead of the current one. To fix this, update the
listener to access the latest selectedUser value dynamically inside the
callback, for example by calling get() within the event handler to retrieve the
current selectedUser before filtering.
| useEffect(() => { | ||
| getMessages(selectedUser._id); | ||
| initLiveDocSocket(); | ||
| }, []); |
There was a problem hiding this comment.
Add initLiveDocSocket to dependency array and implement cleanup.
The useEffect should include its dependency and clean up the socket listener to prevent memory leaks.
useEffect(() => {
initLiveDocSocket();
- }, []);
+
+ // Cleanup function
+ return () => {
+ // You'll need to add cleanupLiveDocSocket to the store
+ // cleanupLiveDocSocket();
+ };
+ }, [initLiveDocSocket]);Note: This requires implementing the cleanupLiveDocSocket method suggested in the useChatStore.js review.
📝 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.
| useEffect(() => { | |
| getMessages(selectedUser._id); | |
| initLiveDocSocket(); | |
| }, []); | |
| useEffect(() => { | |
| initLiveDocSocket(); | |
| // Cleanup function | |
| return () => { | |
| // You'll need to add cleanupLiveDocSocket to the store | |
| // cleanupLiveDocSocket(); | |
| }; | |
| }, [initLiveDocSocket]); |
🤖 Prompt for AI Agents
In frontend/src/components/ChatContainer.jsx around lines 30 to 32, the
useEffect hook calls initLiveDocSocket but does not include it in the dependency
array and lacks a cleanup function. Add initLiveDocSocket to the dependency
array and return a cleanup function that calls cleanupLiveDocSocket to properly
remove the socket listener and prevent memory leaks. Ensure cleanupLiveDocSocket
is implemented as suggested in useChatStore.js.
2 participants
Summary by CodeRabbit
New Features
Enhancements
Bug Fixes