Add banner on home page for announcements

.gitignore

@@ -22,3 +22,4 @@ next-env.d.ts
 
 # Nix
 flake.lock
+.env*.local

app/events/page.tsx

@@ -14,7 +14,7 @@ import styles from './Events.module.css'
 type CompleteEventDetails = EventDetails & { end: number, link: string | null }
 export type EventFrontmatter = Omit<Frontmatter, 'event_details'> & { event_details: CompleteEventDetails }
 
-async function getEvents() {
+export async function getEvents() {
   const markdownFiles = await generateUnmodifiedSlugsFromMarkdownFiles('app/events')
   const events: Frontmatter[] = []
   for (const { slug } of markdownFiles) {

app/page.tsx

@@ -1,12 +1,17 @@
 import { NavItems } from "@/components/NavItems"
 import { HomeLoop } from "@/components/HomeLoop"
+import { HomepageBanner } from "@/components/HomepageBanner"
+import { getEvents } from "./events/page"
 
 import styles from "./Home.module.css"
 
-export default function Home() {
+export default async function Home() {
+  const events = await getEvents()
+
   return (
     <>
       <div id={styles.content}>
+        <HomepageBanner events={events} />
         <h1 id={styles.title}>compsigh</h1>
         <p id={styles.description}>
           compsigh is the social computer science club at USFCA for meeting cool

components/HomepageBanner/HomepageBanner.module.css

@@ -0,0 +1,19 @@
+div.banner {
+  /*font-size: 1.2rem;*/
+
+  /*a {
+    display: flex;
+    white-space: pre;
+    text-decoration: none;
+    padding: 4px 8px;
+  }*/
+}
+
+@media (max-width: 700px) {
+  div.banner {
+    margin-left: -24px;
+    /*a {
+      flex-direction: column;
+    }*/
+  }
+}

components/HomepageBanner/HomepageBanner.test.tsx

@@ -0,0 +1,33 @@
+import { render, screen } from "@testing-library/react"
+import { HomepageBanner } from "./HomepageBanner"
+import { EventFrontmatter } from "@/app/events/page"
+
+describe("Next Component HomepageBanner", () => {
+  it("Renders when an event is coming up", () => {
+    const currentTime = Math.floor(new Date().getTime() / 1000)
+
+    const testing_UpComingEvent: EventFrontmatter[] = [
+      {
+        title: "DAVE",
+        description: "register!",
+        event_details: {
+          start: currentTime + 60,
+          end: currentTime + 90,
+          location: "The Hive",
+          cover_image: "/events/2025-11-07/deploy25.png",
+          pictures: [],
+          link: "https://touch-grass.tech/"
+        },
+        slug: "events/2025-11-07/deploy25"
+      }
+    ]
+
+    render(<HomepageBanner events={testing_UpComingEvent} />)
+
+    const banner = screen.getByText((content) =>
+      content.includes("Next event:")
+    )
+
+    expect(banner).toBeInTheDocument()
+  })
+})

components/HomepageBanner/HomepageBanner.tsx

@@ -0,0 +1,63 @@
+"use client"
+
+// Components
+import { LinkBar } from "@/components/LinkBar"
+
+// Functions
+import { isValidURL } from "./isValidURL"
+
+// Types
+import { EventFrontmatter } from "@/app/events/page"
+
+// Styles
+import styles from "./HomepageBanner.module.css"
+
+export function HomepageBanner({ events }: { events: EventFrontmatter[] }) {
+  const currentTime = Math.floor(new Date().getTime() / 1000)
+  if (events.length === 0) return <></>
+
+  const updatedEvents: EventFrontmatter[] = [
+    ...events,
+    {
+      title: "compsigh night v2026.01.20 6 7",
+      description: "register!",
+      event_details: {
+        start: 1770420908,
+        end: 1770420968,
+        location: "The Hive",
+        cover_image: "/events/2025-11-07/deploy25.png",
+        pictures: [],
+        link: "https://touch-grass.tech/"
+      },
+      slug: "events/2025-11-07/deploy25"
+    }
+  ]
+
+  const upcomingEvents: EventFrontmatter[] = []
+  for (const event of updatedEvents)
+    if (currentTime < event.event_details.start) upcomingEvents.push(event)
+
+  if (upcomingEvents.length === 0) return <></>
+  const nearestUpcomingEvent = upcomingEvents[0]
+  const title = nearestUpcomingEvent.title
+  const eventLink = nearestUpcomingEvent.event_details.link!
+
+  if (!isValidURL(eventLink)) return <></>
+
+  return (
+    <div className={styles.banner}>
+      {/*<Link href={eventLink} style={{ fontFamily: "var(--font-tronica-mono)" }}>
+        <span>Next event: </span>
+        <TextStream duration={1} text={`${title} >`} />
+      </Link>*/}
+      <LinkBar
+        arrowDirection="forward"
+        alignment="end"
+        order="text-first"
+        href={"https://compsigh.club"}
+      >
+        Next event: {title}
+      </LinkBar>
+    </div>
+  )
+}

components/HomepageBanner/index.ts

@@ -0,0 +1 @@
+export { HomepageBanner } from './HomepageBanner'

components/HomepageBanner/isValidURL.test.ts

@@ -0,0 +1,89 @@
+import { isValidURL } from "./isValidURL"
+
+interface Test {
+  name: string
+  input: string
+  expected: boolean
+}
+
+const tests: Test[] = [
+  {
+    name: "Return true for valid URL string",
+    input: "https://touch-grass.tech/",
+    expected: true
+  },
+  {
+    name: "File Transfer Protocol",
+    input: "ftp://example.com",
+    expected: true
+  },
+  {
+    name: "WebSocket Secure Protocol",
+    input: "wss://example.com",
+    expected: true
+  },
+  {
+    name: "Email Protocol",
+    input: "mailto://johnpork@yahoo.com",
+    expected: true
+  },
+  {
+    name: "Torrent Protocol",
+    input:
+      "magnet:?xt=urn:btih:6D5B5F0E8E6E4F5D8B7A9C1E2D3F4A5B6C7D8E9F&dn=example-file.zip&tr=udp://tracker.example.com:6969/announce",
+    expected: true
+  },
+  {
+    name: "Missing protocol",
+    input: "example.com",
+    expected: false
+  },
+  {
+    name: "Fake protocol",
+    input: "67://example.com",
+    expected: false
+  },
+  {
+    name: "Space in domain name",
+    input: "https://example .com",
+    expected: false
+  },
+  {
+    name: "Space in domain",
+    input: "https://exam ple.com/path",
+    expected: false
+  },
+  {
+    name: "No colon after protocol",
+    input: "ftp//example.com",
+    expected: false
+  },
+  {
+    name: "Missing one slash",
+    input: "https:/example.com",
+    expected: true
+  },
+  {
+    name: "Extra slash",
+    input: "https:////////////////example.com",
+    expected: true
+  },
+  {
+    name: "Non-numeric port",
+    input: "https://exam[ple].com",
+    expected: false
+  },
+  {
+    name: "Unencoded spaces in path",
+    input: "https://tungtungtung.com/path with spaces",
+    expected: true
+  }
+]
+
+describe("TS function IsValidURL", () => {
+  tests.forEach((config) => {
+    it(config.name, () => {
+      expect(isValidURL(config.input)).toBe(config.expected)
+    })
+  })
+})

components/HomepageBanner/isValidURL.ts

@@ -0,0 +1,8 @@
+export function isValidURL(url: string): boolean {
+  try {
+    new URL(url)
+    return true
+  } catch {
+    return false
+  }
+}

components/LinkBar/LinkBar.module.css

@@ -11,12 +11,23 @@ div#container {
   width: 100%;
   height: 64px;
   display: flex;
-  justify-content: flex-end;
   align-items: center;
   font-family: var(--font-tronica-mono);
 }
 
-div#container.previous {
+div#container.alignment-start {
+  justify-content: left;
+}
+
+div#container.alignment-end {
+  justify-content: right;
+}
+
+div#container.text-first {
+  flex-direction: row;
+}
+
+div#container.arrow-first {
   flex-direction: row-reverse;
 }
 

components/LinkBar/LinkBar.tsx

@@ -1,23 +1,36 @@
-import Link, { type LinkProps } from 'next/link'
+import Link, { type LinkProps } from "next/link"
 
-import styles from './LinkBar.module.css'
+import styles from "./LinkBar.module.css"
 
 interface LinkBarProps extends LinkProps {
   children: React.ReactNode
-  type?: 'previous' | 'next'
+  arrowDirection?: "back" | "forward"
+  alignment?: "start" | "end"
+  order?: "text-first" | "arrow-first"
 }
 
-export function LinkBar({ children, type = 'next', ...props }: LinkBarProps) {
+export function LinkBar({
+  children,
+  arrowDirection = "forward",
+  alignment = "end",
+  order = "text-first",
+  ...props
+}: LinkBarProps) {
   return (
     <div id={styles["link-container"]}>
       <Link {...props}>
         <div
           id={styles.container}
-          className={type === 'next' ? styles.next : styles.previous}
+          className={`
+            ${order === "text-first" ? styles["text-first"] : styles["arrow-first"]}
+            ${alignment === "start" ? styles["alignment-start"] : styles["alignment-end"]}
+          `}
         >
           <div id={styles.bar} />
           <div>{children}</div>
-          <div id={styles.arrow}>{type === 'next' ? '>' : '<'}</div>
+          <div id={styles.arrow}>
+            {arrowDirection === "forward" ? ">" : "<"}
+          </div>
         </div>
       </Link>
     </div>

components/PostWrapper/PostWrapper.tsx

@@ -31,15 +31,25 @@ function AuthorsAndContent({ content, frontmatter }: PostProps) {
       {frontmatter.previous && (
         <>
           <Spacer size={32} />
-          <LinkBar type="previous" href={frontmatter.previous.link}>
+          <LinkBar
+            arrowDirection="back"
+            alignment="start"
+            order="arrow-first"
+            href={frontmatter.previous.link}
+          >
             {frontmatter.previous.text}
           </LinkBar>
         </>
       )}
       {frontmatter.next && (
         <>
           <Spacer size={32} />
-          <LinkBar type="next" href={frontmatter.next.link}>
+          <LinkBar
+            arrowDirection="forward"
+            alignment="end"
+            order="text-first"
+            href={frontmatter.next.link}
+          >
             {frontmatter.next.text}
           </LinkBar>
         </>

jest.config.mjs

@@ -0,0 +1,12 @@
+import nextJest from 'next/jest.js'
+
+const createJestConfig = nextJest({
+  dir: './',
+})
+
+const config = {
+  testEnvironment: 'jsdom',
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
+}
+
+export default createJestConfig(config)

jest.setup.ts

@@ -0,0 +1 @@
+import '@testing-library/jest-dom'

package.json

@@ -19,7 +19,10 @@
     "prebuild": "pnpm run lint",
     "build": "next build --turbopack",
     "start": "next start",
-    "migrate": "dotenv -e .env.local prisma migrate dev"
+    "migrate": "dotenv -e .env.local prisma migrate dev",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage"
   },
   "dependencies": {
     "@prisma/client": "6.5.0",
@@ -43,10 +46,15 @@
     "use-sound": "5.0.0"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
     "@types/howler": "2.2.12",
+    "@types/jest": "^29.5.0",
     "@types/node": "25.2.3",
     "@types/react": "19.2.14",
     "@types/react-dom": "19.2.3",
+    "jest": "^29.7.0",
+    "jest-environment-jsdom": "^29.7.0",
     "eslint": "9.39.1",
     "eslint-config-next": "16.1.6",
     "next-devtools-mcp": "0.3.10",