ran AI to fix lint warning #80

levtechs · 2025-10-27T19:31:33Z

Ran this prompt:

fix lint errors such as no unused variables

…onent

vercel · 2025-10-27T19:31:40Z

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Project	Deployment	Preview	Comments	Updated (UTC)
coilearn	Ready	Preview	Comment	Oct 27, 2025 7:46pm

gemini-code-assist · 2025-10-27T19:32:06Z

Summary of Changes

Hello @levtechs, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the codebase's quality and performance by systematically eliminating lint warnings, primarily focusing on unused variables and imports. Beyond mere cleanup, it introduces performance optimizations through React hook refactoring and a crucial upgrade to Next.js's <Image> component for improved image loading across key UI elements. The changes contribute to a more efficient and maintainable application.

Highlights

Lint Warning Resolution: The primary focus of this pull request is to address and resolve various lint warnings, particularly those related to unused variables and imports across the codebase. This improves code cleanliness and reduces potential for errors.
Code Optimization: Several React components have been optimized by wrapping functions in useCallback and updating useEffect dependency arrays, enhancing performance and preventing unnecessary re-renders.
Image Optimization: Standard <img> tags have been migrated to Next.js's <Image> component in card_popup.tsx, detail_card.tsx, and study_card.tsx. This change leverages Next.js's built-in image optimization features for better loading performance and user experience.
Unused Code Removal: Unused imports (e.g., arrayUnion, deleteDoc, useState, various Fi icons) and unused variables/props (e.g., setIsCreatingQuiz, result, setProject, isOwner, handleCardClick) have been removed from multiple files, streamlining the codebase.

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gemini-code-assist

Code Review

This pull request, aimed at fixing lint warnings, successfully removes many unused variables and imports, which cleans up the code. The migration from <img> tags to Next.js's <Image> component is also a significant improvement for performance. However, in a couple of instances, the automated removal of type imports has weakened type safety for code that relies on implicit type inference. I've added comments to restore these imports. I also found an opportunity to simplify the code by replacing an unnecessary state variable with a constant.

gemini-code-assist · 2025-10-27T19:33:51Z

app/components/courses/create/create_course.tsx

 import QuizSettingsComponent from "./quiz_settings";
 import LessonComponent from "./edit_lesson";
-import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";
+import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";


The updateCourse function expects its second argument to be of type Omit<Course, "id">. Although the courseData object is not explicitly typed, TypeScript relies on the imported Course and CourseLesson types for structural compatibility checking and type inference. Removing these imports can lead to subtle bugs if the Course or CourseLesson types change in the future, as type checking will be less strict. It's better to keep the imports for type safety.

Suggested change

import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:33:51Z

app/components/courses/create/edit_lesson.tsx

    const [selectedCards, setSelectedCards] = useState<boolean[]>(lesson.cardsToUnlock.map(() => true));
    const [lessonQuizzes, setLessonQuizzes] = useState<{id?: string, status: 'creating' | 'created', title?: string}[]>(lesson.quizIds?.map(id => ({id, status: 'created'})) || []);
-    const [isCreatingQuiz, setIsCreatingQuiz] = useState<boolean | string>(false);
+    const [isCreatingQuiz] = useState<boolean | string>(false);


The state variable isCreatingQuiz is initialized with useState but its value is never updated. It can be simplified to a constant. This improves readability and removes unnecessary state management.

Suggested change

const [isCreatingQuiz] = useState<boolean | string>(false);

const isCreatingQuiz = false;

gemini-code-assist · 2025-10-27T19:33:51Z

app/courses/[courseId]/page.tsx

 import { getQuiz } from "../../views/quiz";
 import { createCourseInvitation } from "../../views/invite";
-import { Course, CourseLesson, Project, Quiz } from "@/lib/types";
+import { Course, Project, Quiz } from "@/lib/types";


The CourseLesson type is used implicitly. For example, when iterating over course.lessons, the type of each lesson is inferred as CourseLesson. Removing the import weakens type safety and can make the code harder to maintain, especially if the CourseLesson type definition changes. It's best to keep the import to ensure proper type checking.

Suggested change

import { Course, Project, Quiz } from "@/lib/types";

import { Course, CourseLesson, Project, Quiz } from "@/lib/types";

levtechs · 2025-10-27T19:35:08Z

/gemini review

gemini-code-assist

Code Review

This pull request aims to fix lint warnings, and while it successfully removes many unused variables and imports, it also introduces some critical issues. Several files have had type imports removed (Course, CourseLesson) that are still required due to being part of other imported types' structures. This will likely cause the build to fail. Additionally, a change from <img> to <Image> in one component has altered the layout by introducing a fixed height for images, which may be an unintended side effect. I've left comments on the specific files with these issues.

gemini-code-assist · 2025-10-27T19:37:34Z

app/components/courses/create/create_course.tsx

 import QuizSettingsComponent from "./quiz_settings";
 import LessonComponent from "./edit_lesson";
-import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";
+import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";


The imports for Course and CourseLesson have been removed. However, Course is used as part of the return type for the getCourse function, and its structure (which includes CourseLesson) is used when calling updateCourse. Removing these imports will likely cause a build error.

Suggested change

import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:37:35Z

app/courses/[courseId]/page.tsx

 import { getQuiz } from "../../views/quiz";
 import { createCourseInvitation } from "../../views/invite";
-import { Course, CourseLesson, Project, Quiz } from "@/lib/types";
+import { Course, Project, Quiz } from "@/lib/types";


The import for CourseLesson has been removed. This type is implicitly used as it's part of the Course type structure, specifically course.lessons which is an array of CourseLesson. Removing this import will likely cause a build error.

Suggested change

import { Course, Project, Quiz } from "@/lib/types";

import { Course, CourseLesson, Project, Quiz } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:37:35Z

app/views/courses.ts

 import { auth } from "@/lib/firebase";

-import { Course, CourseLesson, NewCard, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";
+import { Course, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";


The imports for CourseLesson and NewCard have been removed. However, CourseLesson is a dependency for the Course type (used in updateCourse), and NewCard is a dependency for the NewLesson type. Removing these will likely cause a build error. They should be re-added to the import statement.

Suggested change

import { Course, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";

import { Course, CourseLesson, NewCard, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:37:35Z

app/api/courses/[courseId]/comments/[commentId]/route.ts

 import { db } from "@/lib/firebase";
 import { getVerifiedUid } from "../../../../helpers";
-import { doc, getDoc, updateDoc, deleteDoc, arrayUnion, arrayRemove, Timestamp } from "firebase/firestore";
+import { doc, getDoc, updateDoc, deleteDoc, Timestamp } from "firebase/firestore";


The imports for arrayUnion and arrayRemove were removed. While they are not used in this file, the logic for updating votes in app/api/courses/[courseId]/comments/[commentId]/vote/route.ts was reimplemented manually using filter and push. Using arrayUnion and arrayRemove from Firestore is generally more idiomatic and can be more efficient for managing array membership in documents. Since this PR is about linting, this change is out of scope, but it's worth considering if this was an intentional refactor.

gemini-code-assist · 2025-10-27T19:37:35Z

app/api/courses/create/helpers.ts

@@ -1,4 +1,4 @@
-import { Course, CourseLesson, NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";
+import { NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";


The imports for Course and CourseLesson have been removed. While not directly used as type annotations in this file, they are used in the definition of NewCourse and NewLesson within lib/types.ts. Depending on the TypeScript configuration, their removal might lead to build errors related to exposing types from imported modules. It's safer to keep these imports if they are part of the public API of types used here.

Suggested change

import { NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";

import { Course, CourseLesson, NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:37:35Z

app/components/courses/create/edit_lesson.tsx

    const [selectedCards, setSelectedCards] = useState<boolean[]>(lesson.cardsToUnlock.map(() => true));
    const [lessonQuizzes, setLessonQuizzes] = useState<{id?: string, status: 'creating' | 'created', title?: string}[]>(lesson.quizIds?.map(id => ({id, status: 'created'})) || []);
-    const [isCreatingQuiz, setIsCreatingQuiz] = useState<boolean | string>(false);
+    const [isCreatingQuiz] = useState<boolean | string>(false);


The state setter setIsCreatingQuiz has been removed, but the state isCreatingQuiz is still passed as a prop to QuizSettingsComponent. While setIsCreatingQuiz was unused in this component, it seems the intention was to manage a loading state for quiz creation. If this loading state is still desired, the setter should be used. If not, the isCreatingQuiz state and its prop passing could be removed entirely for cleaner code.

gemini-code-assist · 2025-10-27T19:37:35Z

app/components/editor/cards/card_popup.tsx

+                                    <div key={index} className="relative w-full h-48">
+                                        <Image
+                                            src={url}
+                                            alt={`Reference image ${index + 1}`}
+                                            fill
+                                            className="rounded-lg object-scale-down"
+                                            onError={(e) => {
+                                                (e.target as HTMLImageElement).style.display = 'none';
+                                            }}
+                                        />
+                                    </div>


While replacing <img> with <Image> is a good optimization, this change also replaces h-auto with a fixed height of h-48. This will alter the layout, as images will now be constrained to a fixed height container, which may not have been the original intent. The original h-auto allowed images to maintain their aspect ratio while filling the container's width. This change could lead to images being scaled down more than intended or having unexpected empty space.

gemini-code-assist · 2025-10-27T19:37:35Z

app/components/editor/study/study_panel.tsx


-    const handleCardClick = (card: Card, position: number) => {
-        if (position === 0) {
-            setSelectedCard(card);
-        } else if (position === -1) {
-            setCurrentSlot(currentSlot - 1);
-        } else if (position === 1) {
-            next();
-        }
-    };



The handleCardClick function was removed. However, the onClick handlers for the study cards now contain duplicated logic that was previously in handleCardClick. It would be more maintainable to restore handleCardClick and call it from the onClick handlers.

levtechs · 2025-10-27T19:45:29Z

/gemini review

gemini-code-assist

Code Review

This pull request addresses a number of lint warnings, primarily by removing unused variables and imports across the codebase. The changes are generally correct and improve code cleanliness. Additionally, several <img> tags have been updated to use Next.js's <Image> component, which is a good performance enhancement.

I've left a few comments on specific areas:

A potential race condition in the voting logic that should be addressed with atomic operations.
A security concern with the wildcard hostname configuration for next/image.
A couple of places where removed type imports should be restored to improve code clarity and maintainability.

Overall, good work on cleaning up the code. Addressing the feedback will further improve the application's robustness and security.

gemini-code-assist · 2025-10-27T19:47:55Z

app/api/courses/[courseId]/comments/[commentId]/vote/route.ts

 import { NextRequest, NextResponse } from "next/server";
 import { db } from "@/lib/firebase";
 import { getVerifiedUid } from "../../../../../helpers";
-import { doc, getDoc, updateDoc, arrayUnion, arrayRemove } from "firebase/firestore";


These imports were correctly removed as they are unused. However, the current implementation for vote updates is susceptible to a race condition because it's not atomic. It reads the vote arrays, modifies them, and writes them back. This can lead to lost votes under concurrent requests.

To fix this, you should use Firestore's atomic arrayUnion and arrayRemove operations. This would require re-adding these imports and refactoring the logic.

gemini-code-assist · 2025-10-27T19:47:55Z

next.config.js

+        remotePatterns: [
+            {
+                protocol: 'https',
+                hostname: '**',


Using a wildcard ** for the hostname in remotePatterns allows images from any domain. This can be a security risk, as it makes your application vulnerable to image-based attacks from malicious sources. It's highly recommended to specify a list of trusted hostnames instead of using a wildcard.

gemini-code-assist · 2025-10-27T19:47:56Z

app/components/courses/create/create_course.tsx

 import QuizSettingsComponent from "./quiz_settings";
 import LessonComponent from "./edit_lesson";
-import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";
+import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";


The types Course and CourseLesson were removed, but they seem to be used implicitly in this file. For example, the return type of getCourse uses Course, and its lessons property is an array of CourseLesson. While TypeScript might infer these types, explicitly importing them improves code clarity and maintainability. I suggest re-adding them.

Suggested change

import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

gemini-code-assist · 2025-10-27T19:47:56Z

app/courses/[courseId]/page.tsx

 import { getQuiz } from "../../views/quiz";
 import { createCourseInvitation } from "../../views/invite";
-import { Course, CourseLesson, Project, Quiz } from "@/lib/types";
+import { Course, Project, Quiz } from "@/lib/types";


The type CourseLesson was removed, but it appears to be used implicitly when iterating over course.lessons. To improve code clarity and maintainability, it's better to keep the explicit import.

Suggested change

import { Course, Project, Quiz } from "@/lib/types";

import { Course, CourseLesson, Project, Quiz } from "@/lib/types";

levtechs and others added 30 commits September 4, 2025 23:14

Update README.md

956eeb9

improved cards (issue #17)

3ab2866

fixed spacing issue in content

2e6a7ea

toggle chat

907f7b4

added loading gif

30f7e53

custom media (issue #19)

2440a67

improved cards page (issue #20)

53591ce

improved error messages

1571d29

fixed build errors and improved details on landing page

ef1fcb0

changed font and fixed landing page

0425ba0

card updating on frontend works, and BIG markdown improvements

93c805b

fixed card markdown

2bfd65d

fixed card creation logic

e3d00f8

improved tab switching

7e4fd4b

fixed llm params bug and changed prompting logic

f800a60

fixed layout issues

417e6f5

quiz creation frontend and api endpoint

215fb9d

working quizes!

7b52d90

fixed quiz formatting

0e7792d

fixed build errors

19d2be0

fixed invite bug

54e5033

Update README.md

40d2cad

Clarified prompt

8191cff

BIG COMMIT! implemented message streaming, updates, and improved promtps

418aa9a

Merge remote-tracking branch 'origin/master'

04cc697

removed build warnings, fixed errors, swapped img for next/image comp…

8912fa9

…onent

loading for modals on submit (issue #27)

0cb15c3

reduced number of new tabs open (issue #28)

51ed050

profile pages and icon on dashboard (issue #9)

5c1c22e

fixed build error

ce62b10

Lev Smolsky and others added 18 commits October 26, 2025 02:18

study panel/view

5d755de

Merge branch 'master' of https://github.com/levtechs/coi

9cb56f8

comment section for courses

cd7401a

course owners can delete comments (for moderation)

ea9df5b

edit card exclude fix

5739670

chat settings and full screen

973584c

sign up questionairre, fixed root layout issue

17fc897

improved quiz popup and modal

6409166

follow up questions

378d31d

removed logs/debug for chat

38b3814

fixed details modal

59286c7

fixed + glitch, issue 71

973a0b0

fixed invite panel for projects

e7212ec

login prompt on course page

10e7b9c

login prompt for lesson page

6921240

fixed invite page logic

69a6cc2

duplicates in hierarchy bug fix attempt

5269b9e

ran AI to fix lint warning

8467205

gemini-code-assist bot reviewed Oct 27, 2025

View reviewed changes

fixed build error

e909067

vercel bot deployed to Preview October 27, 2025 19:35 View deployment

gemini-code-assist bot reviewed Oct 27, 2025

View reviewed changes

fixed image issue and resolved gemini

f9278dd

vercel bot deployed to Preview October 27, 2025 19:46 View deployment

gemini-code-assist bot reviewed Oct 27, 2025

View reviewed changes

levtechs force-pushed the master branch from eee83e7 to 9f4c0f7 Compare December 1, 2025 19:00

	import { Card, NewCard, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";
	import { CourseLesson, Card, NewCard, Course, NewCourse, QuizSettings, CourseCategory, NewLesson } from "@/lib/types";

	const [isCreatingQuiz] = useState<boolean \| string>(false);
	const isCreatingQuiz = false;

	import { Course, Project, Quiz } from "@/lib/types";
	import { Course, CourseLesson, Project, Quiz } from "@/lib/types";

	import { Course, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";
	import { Course, CourseLesson, NewCard, Project, NewLesson, QuizSettings, CommentTree, CreateCommentData, UpdateCommentData } from "@/lib/types";

		@@ -1,4 +1,4 @@
		import { Course, CourseLesson, NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";
		import { NewCard, NewCourse, NewLesson, QuizSettings } from "@/lib/types";

ran AI to fix lint warning #80

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ran AI to fix lint warning #80

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