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feat: add Cryptography & Network Security (CNS) subject #264

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4 changes: 3 additions & 1 deletion app/components/subjects.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@ const subjects = {
"IoT (Internet of Things)",
"Compiler Design",
"Cyber Laws and Ethics",
"Cryptography & Network Security",
],
"Semester-6": [
"Machine Learning",
Expand Down Expand Up @@ -107,6 +108,7 @@ const subjectCodes: Record<string, string> = {
"IoT (Internet of Things)": "iot",
"Compiler Design": "cd",
"Cyber Laws and Ethics": "cle",
"Cryptography & Network Security": "cns",
"Machine Learning": "ml",
"Natural Language Processing": "nlp",
"Deep Learning": "dl",
Expand All @@ -125,7 +127,7 @@ const subjectCodes: Record<string, string> = {
};

// Available subjects
const available = ["ep", "c", "em1", "em2", "oops", "dsc", "coa", "os", "ml", "dops", "cd", "cle","ec"];
const available = ["ep", "c", "em1", "em2", "oops", "dsc", "coa", "os", "ml", "dops", "cd", "cle", "ec", "cns"];

export default function SubjectsSection() {
return (
Expand Down
207 changes: 207 additions & 0 deletions app/sem5/cns/[chapter]/page.tsx
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Original file line number Diff line number Diff line change
@@ -0,0 +1,207 @@
import React from "react";
import Link from "next/link";
import { Metadata } from "next";
import { Righteous } from "next/font/google";
import { Ch0Content } from "../content/chapter0";
import { Ch1Content } from "../content/chapter1";
import { Ch2Content } from "../content/chapter2";
import { Ch3Content } from "../content/chapter3";
import { Ch4Content } from "../content/chapter4";
import { Ch5Content } from "../content/chapter5";
import { Ch6Content } from "../content/chapter6";
import { ArrowBigLeft, ArrowBigRight } from "lucide-react";
import { chapters, SubTopic } from "../constants";

const righteous = Righteous({
subsets: ["latin"],
weight: "400",
variable: "--font-righteous",
});

function findChapterOrSubtopic(chapterId: string) {
const chapter = chapters.find((c) => c.id === chapterId);
if (chapter) return { data: chapter, isSubTopic: false, parentChapter: null };

for (const ch of chapters) {
if (ch.subTopics) {
const sub = ch.subTopics.find(
(s) => s.id === chapterId && s.isPage
) as (SubTopic & { isPage: true }) | undefined;
if (sub) return { data: sub, isSubTopic: true, parentChapter: ch };
}
}
return { data: undefined, isSubTopic: false, parentChapter: null };
}

const chapterComponents: Record<string, React.ComponentType> = {
ch0: Ch0Content,
ch1: Ch1Content,
ch2: Ch2Content,
ch3: Ch3Content,
ch4: Ch4Content,
ch5: Ch5Content,
ch6: Ch6Content,
};

type ChapterProps = {
params: Promise<{ chapter: string }>;
};

export async function generateMetadata({
params,
}: ChapterProps): Promise<Metadata> {
const { chapter: chapterId } = await params;
Comment on lines +46 to +53
const { data: chapterData } = findChapterOrSubtopic(chapterId);

const title = chapterData
? `${chapterData.title} | Cryptography & Network Security | openCSE`
: "Cryptography & Network Security | openCSE";

return { title };
}

export default async function ChapterPage({ params }: ChapterProps) {
const { chapter: chapterId } = await params;
const { data: chapterData, isSubTopic, parentChapter } =
findChapterOrSubtopic(chapterId);

if (!chapterData) {
return (
<div className="flex flex-col items-center justify-center min-h-[50vh] text-[#e2d1c1]">
<h1 className="text-2xl font-bold mb-4">Chapter not found</h1>
<Link
href="/sem5/cns/ch0"
className="px-4 py-2 bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition font-bold"
>
Return to Course Outline
</Link>
</div>
);
}

const ChapterComponent = chapterComponents[chapterData.id];
let prevChapter = null;
let nextChapter = null;

if (isSubTopic && parentChapter && parentChapter.subTopics) {
const pageSubTopics = parentChapter.subTopics.filter(
(s): s is SubTopic & { isPage: true } => !!s.isPage
);
const subIndex = pageSubTopics.findIndex((s) => s.id === chapterId);

if (subIndex > 0) {
prevChapter = pageSubTopics[subIndex - 1];
} else {
prevChapter = {
id: parentChapter.id,
title: `Back to ${parentChapter.title}`,
};
}

if (subIndex < pageSubTopics.length - 1) {
nextChapter = pageSubTopics[subIndex + 1];
} else {
const parentIndex = chapters.findIndex((c) => c.id === parentChapter.id);
if (parentIndex < chapters.length - 1) {
nextChapter = chapters[parentIndex + 1];
}
}
} else {
const currentIndex = chapters.findIndex((c) => c.id === chapterId);
if (currentIndex > 0) {
const prevParent = chapters[currentIndex - 1];
if (prevParent.subTopics && prevParent.subTopics.length > 0) {
const pageSubTopics = prevParent.subTopics.filter(
(s): s is SubTopic & { isPage: true } => !!s.isPage
);
prevChapter =
pageSubTopics.length > 0
? pageSubTopics[pageSubTopics.length - 1]
: prevParent;
} else {
prevChapter = prevParent;
}
}

const currentParent = chapters[currentIndex];
if (currentParent.subTopics && currentParent.subTopics.length > 0) {
const pageSubTopics = currentParent.subTopics.filter(
(s): s is SubTopic & { isPage: true } => !!s.isPage
);
nextChapter = pageSubTopics.length > 0 ? pageSubTopics[0] : null;
} else if (currentIndex < chapters.length - 1) {
nextChapter = chapters[currentIndex + 1];
}
}

return (
<div className="flex flex-col bg-[#1B0D00] min-h-full p-4 pt-6 text-[#e2d1c1]">
<div className="flex-1 w-full">
<h1 className={`text-4xl font-bold ${righteous.className} mb-2`}>
Cryptography &amp; Network Security
</h1>

<p className={`text-2xl mt-[-8px] ${righteous.className}`}>
{isSubTopic && parentChapter
? `${parentChapter.title} / ${chapterData.title}`
: chapterData.title}
</p>

<div className="flex justify-between mt-4">
{prevChapter ? (
<Link
href={`/sem5/cns/${prevChapter.id}`}
className="px-4 py-1 text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
<ArrowBigLeft className="inline-block mr-1" /> Previous
</Link>
) : (
<div />
)}

{nextChapter ? (
<Link
href={`/sem5/cns/${nextChapter.id}`}
className="px-4 py-1 text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
Next <ArrowBigRight className="inline-block ml-1" />
</Link>
) : (
<div />
)}
</div>

<hr className="my-6 border-t-2 border-[#c7a669]/40" />
{ChapterComponent ? <ChapterComponent /> : <p>Content loading...</p>}
</div>

<div className="flex justify-between my-8 w-full">
{prevChapter ? (
<Link
href={`/sem5/cns/${prevChapter.id}`}
className="px-4 py-2 bg-[#e2d1c1] text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
<ArrowBigLeft className="inline-block mr-1" /> {prevChapter.title}
</Link>
) : (
<div />
)}

{nextChapter ? (
<Link
href={`/sem5/cns/${nextChapter.id}`}
className="px-4 py-2 bg-[#e2d1c1] text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
{nextChapter.title} <ArrowBigRight className="inline-block ml-1" />
</Link>
) : (
<div />
)}
</div>
</div>
);
}
146 changes: 146 additions & 0 deletions app/sem5/cns/components/sidebar.tsx
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Original file line number Diff line number Diff line change
@@ -0,0 +1,146 @@
"use client";
import React, { useState, useEffect } from "react";
import { Righteous } from "next/font/google";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { chapters } from "../constants";

const righteous = Righteous({
subsets: ["latin"],
weight: "400",
variable: "--font-righteous",
});

export default function Sidebar() {
const pathname = usePathname();
const [open, setOpen] = useState(false);

useEffect(() => {
if (typeof window !== "undefined" && window.innerWidth >= 768) {
setOpen(true);
}
}, []);
Comment on lines +16 to +22

const quizSlugMap: Record<string, string> = {
cns: "cns",
};

const subjectKey = pathname.split("/")[2] ?? "";
const quizSlug = quizSlugMap[subjectKey];
const quizHref = quizSlug ? `/quiz/${quizSlug}` : "/quiz";
Comment on lines +24 to +30
const quizActive = pathname.startsWith("/quiz");

return (
<>
<div
className={`fixed inset-0 md:hidden bg-black/50 z-30 transition-opacity duration-300 ${open ? "opacity-100" : "opacity-0 pointer-events-none"}`}
onClick={() => setOpen(false)}
/>

<div className="flex sticky top-14 z-40 h-[calc(100vh-3.5rem)] w-[50px] md:w-auto pointer-events-none md:pointer-events-auto">
<aside
className={`h-full shrink-0 bg-[#fae8d7] text-[#1B0D00] p-0 flex flex-col transition-all duration-300 pointer-events-auto border-r-0 ${
open ? "w-64 border-r-2 md:border-r-0" : "w-0 overflow-hidden"
}`}
>
<h2
className="flex items-center text-2xl font-normal pt-3 pl-3 mb-2 bg-[#cebb9c] text-[#1B0D00] pb-2 border-b-4 border-[#1B0D00]"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
Chapters
</h2>
<ul className="flex-1 overflow-y-auto no-scrollbar space-y-0">
{chapters.map((ch) => {
const active =
pathname === `/sem5/cns/${ch.id}` ||
(ch.subTopics?.some(
(sub) => sub.isPage && pathname === `/sem5/cns/${sub.id}`
) ?? false);
return (
<li key={ch.id} className="flex flex-col">
<Link
href={`/sem5/cns/${ch.id}`}
className={`block px-3 py-2 text-xl transition ${
active ? "bg-[#fccc7e]" : "hover:bg-[#ffdda7af]"
} ${righteous.className}`}
>
{ch.title}
</Link>
{active && ch.subTopics && (
<ul className="ml-4 border-l-2 border-[#1B0D00]/20 pl-2 my-2 space-y-2">
{ch.subTopics.map((sub) => {
const subActive =
sub.isPage && pathname === `/sem5/cns/${sub.id}`;
return (
<li key={sub.id}>
<Link
href={
sub.isPage
? `/sem5/cns/${sub.id}`
: `/sem5/cns/${ch.id}#${sub.id}`
}
className={`block text-sm transition hover:font-bold ${
subActive
? "text-black font-bold"
: "text-[#3a2a14] hover:text-black"
}`}
>
{sub.title}
</Link>
</li>
);
})}
</ul>
)}
</li>
);
})}
</ul>

<div className="border-t-4 border-[#1B0D00]">
<h2
className="flex items-center text-2xl font-normal pt-3 pl-3 mb-2 bg-[#cebb9c] text-[#1B0D00] pb-2"
style={{ fontFamily: "Rockwell, Serif, serif" }}
>
Quiz
</h2>
<Link
href={quizHref}
className={`flex items-center gap-2 px-3 py-2 text-xl transition ${
quizActive ? "bg-[#fccc7e]" : "hover:bg-[#ffdda7af]"
} ${righteous.className}`}
>
<svg
xmlns="http://www.w3.org/2000/svg"
className="w-5 h-5 shrink-0"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
strokeWidth={2}
strokeLinecap="round"
strokeLinejoin="round"
>
<path d="M12 20h9" />
<path d="M16.5 3.5a2.121 2.121 0 0 1 3 3L7 19l-4 1 1-4Z" />
</svg>
Take the Quiz
</Link>
</div>
</aside>

<button
onClick={() => setOpen(!open)}
className="toggle-sidebar shrink-0 pointer-events-auto bg-[#ffdda7] h-full w-[50px] text-[#1B0D00] text-center font-semibold text-2xl border-l-4 rounded-r-2xl border-[#1B0D00] flex items-center justify-center transition-all duration-300 md:shadow-none"
style={{
fontFamily: "Rockwell, Serif, serif",
boxShadow: open ? "4px 0 15px rgba(0,0,0,0.1)" : "none",
}}
>
<p className="leading-5">
C<br />H<br />A<br />P<br />T<br />E<br />R<br />S
</p>
</button>
</div>
</>
);
}
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