wire up pages

This commit is contained in:
2025-04-29 21:06:13 +01:00
parent 0ae8356341
commit 6537a978c3
11 changed files with 791 additions and 0 deletions

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import { getCategories } from "@/lib/api";
import Link from "next/link";
export default async function CategoriesPage() {
const { items: categories } = await getCategories();
return (
<div className="space-y-6">
<h1 className="text-3xl font-bold">Categories</h1>
<p className="text-[var(--muted-foreground)]">
Browse questions by data structure or algorithm category.
</p>
<div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
{categories.map((category) => (
<Link
key={category.id}
href={`/questions?category=${category.slug}`}
className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)] hover:border-[var(--primary)] transition-colors"
>
<div className="flex items-center justify-between mb-2">
<h3 className="font-semibold">{category.name}</h3>
<span className="text-sm text-[var(--muted-foreground)]">
{category.question_count} questions
</span>
</div>
{category.description && (
<p className="text-sm text-[var(--muted-foreground)]">
{category.description}
</p>
)}
</Link>
))}
</div>
</div>
);
}

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"use client";
export default function Error({
reset,
}: {
error: Error & { digest?: string };
reset: () => void;
}) {
return (
<div className="text-center py-12">
<h1 className="text-4xl font-bold mb-4">Something went wrong</h1>
<p className="text-[var(--muted-foreground)] mb-6">
An error occurred while loading this page.
</p>
<button
onClick={() => reset()}
className="inline-block px-6 py-3 bg-[var(--primary)] text-[var(--primary-foreground)] rounded-lg font-medium hover:opacity-90 transition-opacity"
>
Try Again
</button>
</div>
);
}

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@import "tailwindcss";
:root {
--background: #ffffff;
--foreground: #171717;
--card: #ffffff;
--card-foreground: #171717;
--primary: #3b82f6;
--primary-foreground: #ffffff;
--secondary: #f3f4f6;
--secondary-foreground: #171717;
--muted: #f3f4f6;
--muted-foreground: #6b7280;
--border: #e5e7eb;
--ring: #3b82f6;
}
@media (prefers-color-scheme: dark) {
:root {
--background: #0a0a0a;
--foreground: #ededed;
--card: #171717;
--card-foreground: #ededed;
--primary: #3b82f6;
--primary-foreground: #ffffff;
--secondary: #262626;
--secondary-foreground: #ededed;
--muted: #262626;
--muted-foreground: #a3a3a3;
--border: #262626;
--ring: #3b82f6;
}
}
body {
background: var(--background);
color: var(--foreground);
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
"Helvetica Neue", Arial, sans-serif;
}

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import type { Metadata } from "next";
import Link from "next/link";
import { Providers } from "./providers";
import "./globals.css";
export const metadata: Metadata = {
title: "CodeTutor - Coding Interview Preparation",
description:
"Master coding interviews with curated questions, detailed explanations, and optimal solutions.",
};
export default function RootLayout({
children,
}: {
children: React.ReactNode;
}) {
return (
<html lang="en">
<body className="min-h-screen antialiased">
<Providers>
<header className="border-b border-[var(--border)] bg-[var(--card)]">
<nav className="container mx-auto px-4 py-4 flex items-center justify-between">
<Link
href="/"
className="text-xl font-bold text-[var(--primary)]"
>
CodeTutor
</Link>
<div className="flex items-center gap-6">
<Link
href="/questions"
className="text-[var(--muted-foreground)] hover:text-[var(--foreground)] transition-colors"
>
Questions
</Link>
<Link
href="/categories"
className="text-[var(--muted-foreground)] hover:text-[var(--foreground)] transition-colors"
>
Categories
</Link>
<Link
href="/patterns"
className="text-[var(--muted-foreground)] hover:text-[var(--foreground)] transition-colors"
>
Patterns
</Link>
</div>
</nav>
</header>
<main className="container mx-auto px-4 py-8">{children}</main>
<footer className="border-t border-[var(--border)] mt-auto py-6 text-center text-[var(--muted-foreground)] text-sm">
CodeTutor - Coding Interview Preparation
</footer>
</Providers>
</body>
</html>
);
}

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import Link from "next/link";
export default function NotFound() {
return (
<div className="text-center py-12">
<h1 className="text-4xl font-bold mb-4">404</h1>
<p className="text-[var(--muted-foreground)] mb-6">
The page you&apos;re looking for doesn&apos;t exist.
</p>
<Link
href="/"
className="inline-block px-6 py-3 bg-[var(--primary)] text-[var(--primary-foreground)] rounded-lg font-medium hover:opacity-90 transition-opacity"
>
Go Home
</Link>
</div>
);
}

103
frontend/src/app/page.tsx Normal file
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import Link from "next/link";
import { getStats } from "@/lib/api";
export default async function HomePage() {
let stats;
try {
stats = await getStats();
} catch {
stats = null;
}
return (
<div className="space-y-12">
<section className="text-center py-12">
<h1 className="text-4xl font-bold mb-4">Master Coding Interviews</h1>
<p className="text-[var(--muted-foreground)] text-lg max-w-2xl mx-auto mb-8">
Curated collection of coding interview questions with detailed
explanations, common pitfalls, and optimal solutions.
</p>
<Link
href="/questions"
className="inline-block px-6 py-3 bg-[var(--primary)] text-[var(--primary-foreground)] rounded-lg font-medium hover:opacity-90 transition-opacity"
>
Browse Questions
</Link>
</section>
{stats && (
<section className="grid grid-cols-1 md:grid-cols-3 gap-6">
<div className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)]">
<div className="text-3xl font-bold text-[var(--primary)]">
{stats.total_questions}
</div>
<div className="text-[var(--muted-foreground)]">
Total Questions
</div>
</div>
<div className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)]">
<div className="text-3xl font-bold text-[var(--primary)]">
{stats.by_category.length}
</div>
<div className="text-[var(--muted-foreground)]">Categories</div>
</div>
<div className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)]">
<div className="text-3xl font-bold text-[var(--primary)]">
{stats.by_pattern.length}
</div>
<div className="text-[var(--muted-foreground)]">
Algorithmic Patterns
</div>
</div>
</section>
)}
{stats && (
<section className="grid grid-cols-1 md:grid-cols-3 gap-6">
<div className="p-4 rounded-lg border border-green-200 bg-green-50 dark:border-green-900 dark:bg-green-900/20">
<div className="text-2xl font-bold text-green-600 dark:text-green-400">
{stats.by_difficulty.easy}
</div>
<div className="text-green-700 dark:text-green-300">Easy</div>
</div>
<div className="p-4 rounded-lg border border-yellow-200 bg-yellow-50 dark:border-yellow-900 dark:bg-yellow-900/20">
<div className="text-2xl font-bold text-yellow-600 dark:text-yellow-400">
{stats.by_difficulty.medium}
</div>
<div className="text-yellow-700 dark:text-yellow-300">Medium</div>
</div>
<div className="p-4 rounded-lg border border-red-200 bg-red-50 dark:border-red-900 dark:bg-red-900/20">
<div className="text-2xl font-bold text-red-600 dark:text-red-400">
{stats.by_difficulty.hard}
</div>
<div className="text-red-700 dark:text-red-300">Hard</div>
</div>
</section>
)}
<section className="space-y-4">
<h2 className="text-2xl font-bold">Quick Links</h2>
<div className="grid grid-cols-1 md:grid-cols-2 gap-4">
<Link
href="/categories"
className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)] hover:border-[var(--primary)] transition-colors"
>
<h3 className="font-semibold mb-2">Browse by Category</h3>
<p className="text-[var(--muted-foreground)] text-sm">
Arrays, Trees, Graphs, Dynamic Programming, and more
</p>
</Link>
<Link
href="/patterns"
className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)] hover:border-[var(--primary)] transition-colors"
>
<h3 className="font-semibold mb-2">Browse by Pattern</h3>
<p className="text-[var(--muted-foreground)] text-sm">
Two Pointers, Sliding Window, BFS, DFS, Backtracking, and more
</p>
</Link>
</div>
</section>
</div>
);
}

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import { getPattern, getQuestions } from "@/lib/api";
import { QuestionCard } from "@/components/questions/question-card";
import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card";
import { notFound } from "next/navigation";
export default async function PatternDetailPage({
params,
}: {
params: Promise<{ slug: string }>;
}) {
const { slug } = await params;
let pattern;
let questions;
try {
[pattern, questions] = await Promise.all([
getPattern(slug),
getQuestions({ pattern: slug, limit: 50 }),
]);
} catch {
notFound();
}
return (
<div className="max-w-4xl mx-auto space-y-8">
<div>
<h1 className="text-3xl font-bold mb-2">{pattern.name}</h1>
<p className="text-[var(--muted-foreground)]">
{pattern.question_count} questions using this pattern
</p>
</div>
{pattern.description && (
<Card>
<CardHeader>
<CardTitle>Description</CardTitle>
</CardHeader>
<CardContent>{pattern.description}</CardContent>
</Card>
)}
{pattern.when_to_use && (
<Card>
<CardHeader>
<CardTitle>When to Use</CardTitle>
</CardHeader>
<CardContent className="whitespace-pre-wrap">
{pattern.when_to_use}
</CardContent>
</Card>
)}
<div className="space-y-4">
<h2 className="text-xl font-semibold">Questions</h2>
<div className="grid gap-4">
{questions.items.map((question) => (
<QuestionCard key={question.id} question={question} />
))}
</div>
</div>
</div>
);
}

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import { getPatterns } from "@/lib/api";
import Link from "next/link";
export default async function PatternsPage() {
const { items: patterns } = await getPatterns();
return (
<div className="space-y-6">
<h1 className="text-3xl font-bold">Algorithmic Patterns</h1>
<p className="text-[var(--muted-foreground)]">
Master common problem-solving patterns to recognize and apply them in
interviews.
</p>
<div className="grid grid-cols-1 md:grid-cols-2 gap-4">
{patterns.map((pattern) => (
<Link
key={pattern.id}
href={`/patterns/${pattern.slug}`}
className="p-6 rounded-lg border border-[var(--border)] bg-[var(--card)] hover:border-[var(--primary)] transition-colors"
>
<div className="flex items-center justify-between mb-2">
<h3 className="font-semibold">{pattern.name}</h3>
<span className="text-sm text-[var(--muted-foreground)]">
{pattern.question_count} questions
</span>
</div>
{pattern.description && (
<p className="text-sm text-[var(--muted-foreground)] mb-3">
{pattern.description}
</p>
)}
</Link>
))}
</div>
</div>
);
}

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"use client";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { useState, type ReactNode } from "react";
export function Providers({ children }: { children: ReactNode }) {
const [queryClient] = useState(
() =>
new QueryClient({
defaultOptions: {
queries: {
staleTime: 60 * 1000,
refetchOnWindowFocus: false,
},
},
})
);
return (
<QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
);
}

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import { getQuestion } from "@/lib/api";
import { Badge } from "@/components/ui/badge";
import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card";
import { CodeBlock } from "@/components/ui/code-block";
import { getDifficultyColor, capitalize } from "@/lib/utils";
import Link from "next/link";
import { notFound } from "next/navigation";
export default async function QuestionDetailPage({
params,
}: {
params: Promise<{ slug: string }>;
}) {
const { slug } = await params;
let question;
try {
question = await getQuestion(slug);
} catch {
notFound();
}
return (
<div className="max-w-4xl mx-auto space-y-8">
<div>
<div className="flex items-start justify-between gap-4 mb-4">
<h1 className="text-3xl font-bold">{question.title}</h1>
<Badge className={getDifficultyColor(question.difficulty)}>
{capitalize(question.difficulty)}
</Badge>
</div>
<div className="flex flex-wrap gap-2 mb-4">
{question.categories.map((cat) => (
<Link key={cat.id} href={`/questions?category=${cat.slug}`}>
<Badge variant="outline">{cat.name}</Badge>
</Link>
))}
{question.patterns.map((pat) => (
<Link key={pat.id} href={`/patterns/${pat.slug}`}>
<Badge>{pat.name}</Badge>
</Link>
))}
</div>
{question.leetcode_url && (
<a
href={question.leetcode_url}
target="_blank"
rel="noopener noreferrer"
className="text-[var(--primary)] hover:underline text-sm"
>
View on LeetCode
</a>
)}
</div>
<Card>
<CardHeader>
<CardTitle>Problem</CardTitle>
</CardHeader>
<CardContent className="prose dark:prose-invert max-w-none">
<div className="whitespace-pre-wrap">{question.description}</div>
</CardContent>
</Card>
{question.constraints && (
<Card>
<CardHeader>
<CardTitle>Constraints</CardTitle>
</CardHeader>
<CardContent>
<pre className="text-sm whitespace-pre-wrap">
{question.constraints}
</pre>
</CardContent>
</Card>
)}
{question.examples && question.examples.length > 0 && (
<Card>
<CardHeader>
<CardTitle>Examples</CardTitle>
</CardHeader>
<CardContent className="space-y-4">
{question.examples.map((example, i) => (
<div
key={i}
className="p-4 rounded bg-[var(--secondary)] space-y-2"
>
<div>
<span className="font-medium">Input: </span>
<code>{example.input}</code>
</div>
<div>
<span className="font-medium">Output: </span>
<code>{example.output}</code>
</div>
{example.explanation && (
<div className="text-sm text-[var(--muted-foreground)]">
{example.explanation}
</div>
)}
</div>
))}
</CardContent>
</Card>
)}
{question.explanation && (
<>
<Card>
<CardHeader>
<CardTitle>Approach</CardTitle>
</CardHeader>
<CardContent className="whitespace-pre-wrap">
{question.explanation.approach}
</CardContent>
</Card>
<Card>
<CardHeader>
<CardTitle>Intuition</CardTitle>
</CardHeader>
<CardContent className="whitespace-pre-wrap">
{question.explanation.intuition}
</CardContent>
</Card>
<Card>
<CardHeader>
<CardTitle>Complexity Analysis</CardTitle>
</CardHeader>
<CardContent className="space-y-2">
<div>
<span className="font-medium">Time: </span>
{question.explanation.time_complexity}
</div>
<div>
<span className="font-medium">Space: </span>
{question.explanation.space_complexity}
</div>
{question.explanation.complexity_explanation && (
<div className="text-sm text-[var(--muted-foreground)] mt-2 whitespace-pre-wrap">
{question.explanation.complexity_explanation}
</div>
)}
</CardContent>
</Card>
{question.explanation.common_pitfalls &&
question.explanation.common_pitfalls.length > 0 && (
<Card>
<CardHeader>
<CardTitle>Common Pitfalls</CardTitle>
</CardHeader>
<CardContent className="space-y-4">
{question.explanation.common_pitfalls.map((pitfall, i) => (
<div key={i} className="p-4 rounded bg-[var(--secondary)]">
<h4 className="font-medium mb-2">{pitfall.title}</h4>
<p className="text-sm whitespace-pre-wrap">
{pitfall.description}
</p>
{pitfall.wrong_approach && (
<div className="mt-2 text-sm">
<span className="text-red-500">Wrong: </span>
<code>{pitfall.wrong_approach}</code>
</div>
)}
{pitfall.correct_approach && (
<div className="mt-1 text-sm">
<span className="text-green-500">Correct: </span>
<code>{pitfall.correct_approach}</code>
</div>
)}
</div>
))}
</CardContent>
</Card>
)}
{question.explanation.key_takeaways &&
question.explanation.key_takeaways.length > 0 && (
<Card>
<CardHeader>
<CardTitle>Key Takeaways</CardTitle>
</CardHeader>
<CardContent>
<ul className="list-disc list-inside space-y-1">
{question.explanation.key_takeaways.map((takeaway, i) => (
<li key={i}>{takeaway}</li>
))}
</ul>
</CardContent>
</Card>
)}
</>
)}
{question.solutions.length > 0 && (
<Card>
<CardHeader>
<CardTitle>Solutions</CardTitle>
</CardHeader>
<CardContent className="space-y-6">
{question.solutions.map((solution) => (
<div key={solution.id}>
<div className="flex items-center gap-2 mb-2">
<h4 className="font-medium">{solution.approach_name}</h4>
{solution.is_optimal && (
<Badge className="bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-400">
Optimal
</Badge>
)}
</div>
{solution.explanation && (
<p className="text-sm text-[var(--muted-foreground)] mb-3">
{solution.explanation}
</p>
)}
<CodeBlock code={solution.code} language={solution.language} />
</div>
))}
</CardContent>
</Card>
)}
</div>
);
}

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import { getQuestions, getCategories, getPatterns } from "@/lib/api";
import { QuestionCard } from "@/components/questions/question-card";
import Link from "next/link";
interface SearchParams {
difficulty?: string;
category?: string;
pattern?: string;
search?: string;
page?: string;
}
export default async function QuestionsPage({
searchParams,
}: {
searchParams: Promise<SearchParams>;
}) {
const params = await searchParams;
const [questionsResponse, categoriesResponse, patternsResponse] =
await Promise.all([
getQuestions({
difficulty: params.difficulty,
category: params.category,
pattern: params.pattern,
search: params.search,
page: params.page ? parseInt(params.page) : 1,
}),
getCategories(),
getPatterns(),
]);
const difficulties = ["easy", "medium", "hard"];
return (
<div className="space-y-6">
<h1 className="text-3xl font-bold">Questions</h1>
<div className="flex flex-wrap gap-4 p-4 rounded-lg bg-[var(--secondary)]">
<div className="space-y-1">
<label className="text-sm text-[var(--muted-foreground)]">
Difficulty
</label>
<div className="flex gap-2">
<Link
href="/questions"
className={`px-3 py-1 rounded text-sm ${
!params.difficulty
? "bg-[var(--primary)] text-[var(--primary-foreground)]"
: "bg-[var(--card)] hover:bg-[var(--muted)]"
}`}
>
All
</Link>
{difficulties.map((d) => (
<Link
key={d}
href={`/questions?difficulty=${d}`}
className={`px-3 py-1 rounded text-sm capitalize ${
params.difficulty === d
? "bg-[var(--primary)] text-[var(--primary-foreground)]"
: "bg-[var(--card)] hover:bg-[var(--muted)]"
}`}
>
{d}
</Link>
))}
</div>
</div>
<div className="space-y-1">
<label className="text-sm text-[var(--muted-foreground)]">
Category
</label>
<select
defaultValue={params.category || ""}
className="px-3 py-1 rounded text-sm bg-[var(--card)] border border-[var(--border)]"
onChange={(e) => {
const url = new URL(window.location.href);
if (e.target.value) {
url.searchParams.set("category", e.target.value);
} else {
url.searchParams.delete("category");
}
window.location.href = url.toString();
}}
>
<option value="">All Categories</option>
{categoriesResponse.items.map((cat) => (
<option key={cat.id} value={cat.slug}>
{cat.name} ({cat.question_count})
</option>
))}
</select>
</div>
<div className="space-y-1">
<label className="text-sm text-[var(--muted-foreground)]">
Pattern
</label>
<select
defaultValue={params.pattern || ""}
className="px-3 py-1 rounded text-sm bg-[var(--card)] border border-[var(--border)]"
onChange={(e) => {
const url = new URL(window.location.href);
if (e.target.value) {
url.searchParams.set("pattern", e.target.value);
} else {
url.searchParams.delete("pattern");
}
window.location.href = url.toString();
}}
>
<option value="">All Patterns</option>
{patternsResponse.items.map((pat) => (
<option key={pat.id} value={pat.slug}>
{pat.name} ({pat.question_count})
</option>
))}
</select>
</div>
</div>
<div className="text-sm text-[var(--muted-foreground)]">
Showing {questionsResponse.items.length} of {questionsResponse.total}{" "}
questions
</div>
<div className="grid gap-4">
{questionsResponse.items.map((question) => (
<QuestionCard key={question.id} question={question} />
))}
</div>
{questionsResponse.pages > 1 && (
<div className="flex justify-center gap-2">
{Array.from({ length: questionsResponse.pages }, (_, i) => i + 1).map(
(page) => (
<Link
key={page}
href={`/questions?page=${page}${
params.difficulty ? `&difficulty=${params.difficulty}` : ""
}${params.category ? `&category=${params.category}` : ""}${
params.pattern ? `&pattern=${params.pattern}` : ""
}`}
className={`px-3 py-1 rounded ${
page === questionsResponse.page
? "bg-[var(--primary)] text-[var(--primary-foreground)]"
: "bg-[var(--secondary)] hover:bg-[var(--muted)]"
}`}
>
{page}
</Link>
)
)}
</div>
)}
</div>
);
}