feat: Added viewer

2026-02-12 17:45:47 +01:00
parent 5ac84e3690
commit cea8cdf4ee
44 changed files with 16005 additions and 9 deletions
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -12,19 +12,27 @@
    "build": "tsc && cd web && hugo --gc --minify",
    "build-noweb": "tsc",
    "serve": "concurrently \"node dist/server.js\" \"node dist/cron-runner.js\"",
-    "dev-web": "cd web && hugo serve"
+    "dev-web": "cd web && hugo serve",
+    "parse-timetable": "node scripts/load_static_schedule.js"
  },
  "dependencies": {
+    "axios": "^1.13.5",
+    "axios-cookiejar-support": "^6.0.5",
    "body-parser": "^2.2.0",
    "cheerio": "^1.1.2",
+    "cli-progress": "^3.12.0",
    "concurrently": "^9.2.0",
    "cors": "^2.8.6",
    "dotenv": "^17.2.3",
    "exceljs": "^4.4.0",
    "express": "^5.1.0",
+    "inquirer": "^13.2.2",
    "jszip": "^3.10.1",
+    "next": "^16.1.6",
    "node-cron": "^4.2.1",
+    "password-prompt": "^1.1.3",
    "puppeteer": "^24.10.0",
+    "tough-cookie": "^6.0.0",
    "xml2js": "^0.6.2"
  },
  "devDependencies": {
@@ -32,6 +40,7 @@
    "@types/cors": "^2.8.19",
    "@types/express": "^5.0.6",
    "@types/jszip": "^3.4.0",
+    "@types/next": "^8.0.7",
    "@types/node": "^25.2.3",
    "@types/node-cron": "^3.0.11",
    "@types/xml2js": "^0.4.14",
--- a/scripts/load_static_schedule.js
+++ b/scripts/load_static_schedule.js
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2025 Jakub Žitník
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import axios from "axios";
+import { CookieJar } from "tough-cookie";
+import { wrapper } from "axios-cookiejar-support";
+import * as cheerio from "cheerio";
+import { URLSearchParams } from "url";
+import fs from "fs";
+import inquirer from "inquirer";
+import cliProgress from "cli-progress";
+
+const BASE = "https://www.spsejecna.cz";
+const PATHS = {
+  SET_ROLE: "/user/role",
+  LOGIN: "/user/login",
+  TEACHERS: "/ucitel",
+  TEACHER: teacherCode => `/ucitel/${teacherCode}`
+};
+
+const jar = new CookieJar();
+
+const client = wrapper(axios.create({
+  baseURL: BASE,
+  jar,
+  withCredentials: true,
+  headers: {
+    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0",
+    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
+  }
+}));
+
+async function login(username, password) {
+  console.log("Logging in!");
+  await client.get("/");
+
+  await client.get(PATHS.SET_ROLE, {
+    params: { role: "student" }
+  });
+
+  const token3Res = await client.get("/");
+  const token3 = token3Res.data.match(/"token3"\s+value="(\d+)"/)[1];
+
+  const form = new URLSearchParams();
+  form.append('user', username);
+  form.append('pass', password);
+  form.append('token3', token3);
+  form.append('submit', 'Přihlásit+se');
+
+  try {
+    const response = await client.post(PATHS.LOGIN, form.toString(), {
+      headers: {
+        "Content-Type": "application/x-www-form-urlencoded"
+      },
+      maxRedirects: 0
+    });
+
+    if (response.status == 200) {
+      console.log("INVALID CREDENTIALS!");
+      process.exit(1);
+    }
+  } catch {}
+}
+
+async function getAllTeacherCodes() {
+  console.log("Fetching teacher list");
+  const list = new Set();
+  const response = await client.get(PATHS.TEACHERS);
+  const $ = cheerio.load(response.data);
+
+  $("main .contentLeftColumn li, main .contentRightColumn li").each((_, el) => {
+    const link = $(el).find("a");
+    const href = link.attr("href");
+
+    if (href) {
+      const key = href.split("/").pop().toLowerCase();
+      list.add(key);
+    }
+  });
+
+  return list;
+}
+
+async function constructSchedules(allTeachers) {
+  console.log("Fetching teachers");
+  const progressBar = new cliProgress.SingleBar({
+      format: 'Progress |{bar}| {percentage}% || {value}/{total} steps',
+      barCompleteChar: '\u2588',
+      barIncompleteChar: '\u2591',
+      hideCursor: true
+  });
+  progressBar.start(allTeachers.size, 0);
+  const classes = {};
+
+  function setupClass(className) {
+    function generateArray(width, height) {
+      return Array.from({ length: height }, () => Array.from({ length: width }, () => []));
+    }
+    classes[className.toLowerCase()] = generateArray(10, 5);
+  }
+
+  let idk = 0;
+  for (const key of allTeachers) {
+    idk++;
+    const response = await client.get(PATHS.TEACHER(key));
+    const $ = cheerio.load(response.data);
+
+    const tbody = $('table.timetable > tbody');
+    if (!tbody.length) {
+      console.log(`ERROR: ${key}`)
+      continue;
+    }
+
+    tbody.find('tr').slice(1).each((dayIndex, tr) => {
+      const $tr = $(tr);
+      
+      let currentHour = 0;
+
+      $tr.find('td').each((_, td) => {
+        const $td = $(td);
+        
+        const colspan = parseInt($td.attr('colspan') || '1', 10);
+
+        const $subject = $td.find('span.subject');
+        const $class = $td.find('span.class');
+        const $group = $td.find('span.group');
+        const $room = $td.find('a.room');
+        const $employee = $td.find('a.employee');
+
+        const hasData = $subject.length && $class.length && $room.length && $employee.length;
+        
+        let cellData = null;
+        let classText = '';
+
+        if (hasData) {
+           classText = $class.text().trim().toLowerCase();
+           cellData = {
+            subject: $subject.text().trim(),
+            title: $subject.attr('title')?.trim() || '',
+            group: $group.length ? $group.text().trim() : null,
+            room: $room.text().trim(),
+            teacher: {
+              code: $employee.text().trim().toLowerCase(),
+              name: $employee.attr('title')?.trim() || ''
+            }
+          };
+        }
+
+        for (let i = 0; i < colspan; i++) {
+          if (currentHour >= 10) {
+            break; 
+          }
+
+          if (hasData && cellData) {
+            if (classes[classText] === undefined) {
+              setupClass(classText);
+            }
+            
+            classes[classText][dayIndex][currentHour].push(cellData);
+          }
+
+          currentHour++; 
+        }
+      });
+    });
+    
+    progressBar.update(idk);
+  }
+
+  progressBar.stop();
+
+  return classes;
+}
+
+const answers = await inquirer.prompt([
+  {
+    type: 'input',
+    name: 'username',
+    message: 'Enter your username:',
+  },
+  {
+    type: 'password',
+    name: 'password',
+    message: 'Enter your password:',
+    mask: '*',
+  },
+  {
+    type: 'input',
+    name: 'filePath',
+    message: 'Enter the file path to save:',
+    default: './output.json',
+  },
+]);
+
+await login(answers.username, answers.password);
+const allTeachers = await getAllTeacherCodes();
+
+const schedule = await constructSchedules(allTeachers)
+const str = JSON.stringify(schedule);
+
+fs.writeFileSync(answers.filePath, str, {
+  encoding: "utf8"
+});
+
+console.log("Done!");
--- a/server.ts
+++ b/server.ts
@@ -19,6 +19,8 @@ import fs from "fs/promises";
 import { getCurrentInterval } from "./scheduleRules.js";
 import bodyParser from "body-parser";
 import cors from "cors";
+import next from "next";
+import { fileURLToPath } from "url";

 const DB_FOLDER = path.join(process.cwd(), "volume", "db");
 const WEB_FOLDER = path.join(process.cwd(), "web", "public");
@@ -82,6 +84,10 @@ app.get("/status", async (_: Request, res: Response) => {
  }
 })

+app.get("/posts/viewer/redirect", (_: Request, res: Response) => {
+  res.redirect(302, "/viewer");
+})
+
 app.post("/report", async (req: Request, res: Response): Promise<any> => {
  const { class: className, location, content } = req.body;
  if (!className || !location || !content) {
@@ -121,10 +127,27 @@ app.post("/report", async (req: Request, res: Response): Promise<any> => {
 });

 if (SERVE_WEB) {
+  const __filename = fileURLToPath(import.meta.url)
+  const __dirname = path.dirname(__filename)
+  const dev = process.env.NODE_ENV !== 'production'
+
+  const nextApp = next({
+    dev,
+    dir: path.join(__dirname, 'viewer')
+  })
+
+  const handle = nextApp.getRequestHandler()
+
+  await nextApp.prepare()
+
+  app.all(/^\/viewer(?:$|\/.*)/, (req, res) => {
+    return handle(req, res)
+  })
+
  app.use(express.static(path.join(process.cwd(), 'web/public'), {
    index: 'index.html',
    extensions: ['html'],
-  }));
+  }))
 }

 app.listen(PORT, () => {
--- a/viewer/.gitignore
+++ b/viewer/.gitignore
@@ -0,0 +1,41 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
--- a/viewer/README.md
+++ b/viewer/README.md
@@ -0,0 +1,36 @@
+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
--- a/viewer/app/all/page.tsx
+++ b/viewer/app/all/page.tsx
@@ -0,0 +1,8 @@
+import { getData } from '@/lib/api';
+import SubstitutionViewer from './substitution-viewer';
+
+export default async function Page() {
+  const data = await getData();
+
+  return <SubstitutionViewer initialData={data} />;
+}
--- a/viewer/app/all/substitution-viewer.tsx
+++ b/viewer/app/all/substitution-viewer.tsx
@@ -0,0 +1,224 @@
+'use client';
+
+import { useState, useMemo, useTransition, useEffect } from 'react';
+import { format, parseISO } from 'date-fns';
+import { RefreshCw } from 'lucide-react';
+import { useRouter } from 'next/navigation';
+
+import { SubstitutionData, ChangeEntry } from '@/lib/types';
+import { Button } from '@/components/ui/button';
+import { Card } from '@/components/ui/card';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
+import { Label } from '@/components/ui/label';
+import TakesPlace from '@/components/own/takes-place';
+import { TeacherAbsenceItem } from '@/components/own/teacher-absence';
+
+interface SubstitutionViewerProps {
+  initialData: SubstitutionData | null;
+}
+
+export default function SubstitutionViewer({ initialData }: SubstitutionViewerProps) {
+  const router = useRouter();
+  const [isPending, startTransition] = useTransition();
+  const data = initialData;
+  
+  const [selectedDate, setSelectedDate] = useState<string>('');
+
+  useEffect(() => {
+    if (data?.schedule) {
+      const dates = Object.keys(data.schedule).sort();
+      if (dates.length > 0) {
+        if (!selectedDate || !data.schedule[selectedDate]) {
+          setSelectedDate(dates[0]);
+        }
+      }
+    }
+  }, [data, selectedDate]);
+
+  const currentDayData = data?.schedule?.[selectedDate];
+
+  const handleRefresh = () => {
+    startTransition(() => {
+      router.refresh();
+    });
+  };
+
+  const dates = data ? Object.keys(data.schedule).sort() : [];
+
+  if (!data) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-screen text-muted-foreground space-y-4">
+        <p>Nepodařilo se načíst data.</p>
+        <Button onClick={() => window.location.reload()}>Zkusit znovu</Button>
+      </div>
+    );
+  }
+
+  return (
+
+      <main className="flex-1 w-full max-w-[1920px] mx-auto p-4 md:p-6 space-y-6">
+        <div className="flex flex-col sm:flex-row sm:items-center justify-between gap-4 text-sm text-muted-foreground p-4 rounded-lg border">
+          <div>
+            <span className="font-medium">Poslední aktualizace:</span> {data.status.lastUpdated}
+            <span className="mx-2 hidden sm:inline">•</span>
+            <br className="sm:hidden" />
+            <span >
+              Aktualizace každých {data.status.currentUpdateSchedule < 60 ? `${data.status.currentUpdateSchedule} min` : `${data.status.currentUpdateSchedule / 60} hod`}
+            </span>
+          </div>
+          <Button variant="outline" size="sm" onClick={handleRefresh} disabled={isPending} className="w-full sm:w-auto">
+            <RefreshCw className={`h-4 w-4 mr-2 ${isPending ? 'animate-spin' : ''}`} />
+            Aktualizovat
+          </Button>
+        </div>
+
+        <div className="max-w-md">
+          <Label htmlFor="date-select" className="mb-2 block">Datum</Label>
+          <Select value={selectedDate} onValueChange={setSelectedDate}>
+            <SelectTrigger id="date-select" className="w-full">
+              <SelectValue placeholder="Vyberte datum" />
+            </SelectTrigger>
+            <SelectContent>
+              {dates.map((date) => {
+                const info = data.schedule[date];
+                const label = format(parseISO(date), 'd.M.yyyy');
+                const suffix = info.info.inWork ? ' (příprava)' : ''; 
+                return (
+                  <SelectItem key={date} value={date}>
+                    {label}{suffix}
+                  </SelectItem>
+                );
+              })}
+            </SelectContent>
+          </Select>
+        </div>
+
+        {currentDayData ? (
+          <div className="grid grid-cols-1 xl:grid-cols-4 gap-6">
+            <div className="xl:col-span-3 space-y-6">
+              
+              <div>
+                <h2 className="text-xl font-semibold mb-3">Změny v rozvrhu</h2>
+                <SubstitutionsTable changes={currentDayData.changes} />
+              </div>
+
+              <TakesPlace string={currentDayData.takesPlace} />
+            </div>
+
+            <div className="xl:col-span-1 space-y-6">
+              <div>
+                <h2 className="text-xl font-semibold mb-3 text-slate-900 dark:text-slate-100">Absence učitelů</h2>
+                {currentDayData.absence.length > 0 ? (
+                  <div className="space-y-3">
+                    {currentDayData.absence.map((entry, idx) => (
+                      <TeacherAbsenceItem key={idx} entry={entry} />
+                    ))}
+                  </div>
+                ) : (
+                  <div className="p-4 rounded-lg border border-dashed text-muted-foreground text-center bg-slate-50 dark:bg-slate-900/50">
+                    Žádní učitelé nemají absenci
+                  </div>
+                )}
+              </div>
+            </div>
+          </div>
+        ) : (
+          <div className="flex flex-col items-center justify-center py-20 text-muted-foreground">
+            <p className="text-lg">Pro vybrané datum nejsou k dispozici žádná data.</p>
+          </div>
+        )}
+      </main>
+  );
+}
+
+function SubstitutionsTable({ changes }: { changes: Record<string, (ChangeEntry | null)[]> }) {
+  const sortedClasses = useMemo(() => {
+    return Object.keys(changes).sort((a, b) => {
+      const regex = /^([A-Z]+)(\d+)([a-z]*)$/;
+      const ma = a.match(regex);
+      const mb = b.match(regex);
+
+      if (ma && mb) {
+          const [, pa, na, sa] = ma;
+          const [, pb, nb, sb] = mb;
+
+          const numDiff = parseInt(na) - parseInt(nb);
+          if (numDiff !== 0) return numDiff;
+          
+          const prefixDiff = pa.localeCompare(pb);
+          if (prefixDiff !== 0) return prefixDiff;
+
+          return sa.localeCompare(sb);
+      }
+
+      return a.localeCompare(b, undefined, { numeric: true, sensitivity: 'base' });
+    });
+  }, [changes]);
+
+  const maxHours = useMemo(() => {
+    let max = 0;
+    Object.values(changes).forEach(list => {
+      if (list.length > max) max = list.length;
+    });
+    return max;
+  }, [changes]);
+
+  const hours = Array.from({ length: maxHours }, (_, i) => i + 1);
+
+  return (
+    <Card className="overflow-hidden border p-0">
+      <div className="overflow-x-auto">
+        <table className="w-full text-sm text-left border-collapse">
+          <thead>
+            <tr>
+              <th className="p-3 font-semibold border-b border-r min-w-[80px] text-center sticky left-0 z-10">
+                
+              </th>
+              {hours.map(h => (
+                <th key={h} className="p-3 font-semibold border-b border-r min-w-[60px] text-center w-[60px]">
+                  {h}
+                </th>
+              ))}
+            </tr>
+          </thead>
+          <tbody>
+            {sortedClasses.map((className) => (
+              <tr key={className} className="border-b last:border-0">
+                <td className="p-2 font-bold border-r sticky left-0 z-10 bg-card text-center">
+                  {className}
+                </td>
+                {hours.map((_, idx) => {
+                  const change = changes[className][idx];
+                  return (
+                    <td key={idx} className="p-[2px] border-r w-[70px] h-[70px] align-middle">
+                      {change ? (
+                        <div 
+                          className="w-full h-full min-h-[46px] flex items-center justify-center p-1 rounded-sm text-xs text-center truncate"
+                          style={{
+                            backgroundColor: change.backgroundColor || '#eee',
+                            color: change.foregroundColor ? "#" +change.foregroundColor.substring(3, 6) : '#000'
+                          }}
+                          title={change.text}
+                        >
+                          {change.text}
+                        </div>
+                      ) : (
+                        <div className="w-full h-full min-h-[46px]"></div>
+                      )}
+                    </td>
+                  );
+                })}
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </Card>
+  );
+}
--- a/viewer/app/globals.css
+++ b/viewer/app/globals.css
@@ -0,0 +1,127 @@
+@import "tailwindcss";
+@import "tw-animate-css";
+
+@custom-variant dark (&:is(.dark *));
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --font-sans: var(--font-geist-sans);
+  --font-mono: var(--font-geist-mono);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar: var(--sidebar);
+  --color-chart-5: var(--chart-5);
+  --color-chart-4: var(--chart-4);
+  --color-chart-3: var(--chart-3);
+  --color-chart-2: var(--chart-2);
+  --color-chart-1: var(--chart-1);
+  --color-ring: var(--ring);
+  --color-input: var(--input);
+  --color-border: var(--border);
+  --color-destructive: var(--destructive);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-accent: var(--accent);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-muted: var(--muted);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-secondary: var(--secondary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-primary: var(--primary);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-popover: var(--popover);
+  --color-card-foreground: var(--card-foreground);
+  --color-card: var(--card);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+  --radius-2xl: calc(var(--radius) + 8px);
+  --radius-3xl: calc(var(--radius) + 12px);
+  --radius-4xl: calc(var(--radius) + 16px);
+}
+
+:root {
+  --radius: 0.625rem;
+  --background: oklch(1 0 0);
+  --foreground: oklch(0.145 0 0);
+  --card: oklch(1 0 0);
+  --card-foreground: oklch(0.145 0 0);
+  --popover: oklch(1 0 0);
+  --popover-foreground: oklch(0.145 0 0);
+  --primary: oklch(0.205 0 0);
+  --primary-foreground: oklch(0.985 0 0);
+  --secondary: oklch(0.97 0 0);
+  --secondary-foreground: oklch(0.205 0 0);
+  --muted: oklch(0.97 0 0);
+  --muted-foreground: oklch(0.556 0 0);
+  --accent: oklch(0.97 0 0);
+  --accent-foreground: oklch(0.205 0 0);
+  --destructive: oklch(0.577 0.245 27.325);
+  --border: oklch(0.922 0 0);
+  --input: oklch(0.922 0 0);
+  --ring: oklch(0.708 0 0);
+  --chart-1: oklch(0.646 0.222 41.116);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  --sidebar: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.145 0 0);
+  --sidebar-primary: oklch(0.205 0 0);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.97 0 0);
+  --sidebar-accent-foreground: oklch(0.205 0 0);
+  --sidebar-border: oklch(0.922 0 0);
+  --sidebar-ring: oklch(0.708 0 0);
+}
+
+.dark {
+  --background: oklch(0.145 0 0);
+  --foreground: oklch(0.985 0 0);
+  --card: oklch(0.205 0 0);
+  --card-foreground: oklch(0.985 0 0);
+  --popover: oklch(0.205 0 0);
+  --popover-foreground: oklch(0.985 0 0);
+  --primary: oklch(0.922 0 0);
+  --primary-foreground: oklch(0.205 0 0);
+  --secondary: oklch(0.269 0 0);
+  --secondary-foreground: oklch(0.985 0 0);
+  --muted: oklch(0.269 0 0);
+  --muted-foreground: oklch(0.708 0 0);
+  --accent: oklch(0.269 0 0);
+  --accent-foreground: oklch(0.985 0 0);
+  --destructive: oklch(0.704 0.191 22.216);
+  --border: oklch(1 0 0 / 10%);
+  --input: oklch(1 0 0 / 15%);
+  --ring: oklch(0.556 0 0);
+  --chart-1: oklch(0.488 0.243 264.376);
+  --chart-2: oklch(0.696 0.17 162.48);
+  --chart-3: oklch(0.769 0.188 70.08);
+  --chart-4: oklch(0.627 0.265 303.9);
+  --chart-5: oklch(0.645 0.246 16.439);
+  --sidebar: oklch(0.205 0 0);
+  --sidebar-foreground: oklch(0.985 0 0);
+  --sidebar-primary: oklch(0.488 0.243 264.376);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.269 0 0);
+  --sidebar-accent-foreground: oklch(0.985 0 0);
+  --sidebar-border: oklch(1 0 0 / 10%);
+  --sidebar-ring: oklch(0.556 0 0);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
+    @apply bg-background text-foreground;
+  }
+}
--- a/viewer/app/layout.tsx
+++ b/viewer/app/layout.tsx
@@ -0,0 +1,81 @@
+import type { Metadata } from "next";
+import { Geist, Geist_Mono } from "next/font/google";
+import "./globals.css";
+import { ThemeProvider } from "@/components/theme-provider";
+import { Toaster } from "@/components/ui/sonner";
+
+import { AlertTriangle, InfoIcon, Menu } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const metadata: Metadata = {
+  title: "Mimořádný rozvrh SPŠE Ječná",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en" suppressHydrationWarning>
+      <body
+        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
+      >
+        <ThemeProvider
+          attribute="class"
+          defaultTheme="system"
+          enableSystem
+          disableTransitionOnChange
+        >
+            <div className="flex flex-col min-h-screen">
+              <header className="sticky top-0 z-20 flex items-center justify-between px-4 py-3 border-b bg-background">
+                <div className="flex items-center gap-3">
+                  <Button variant="ghost" size="icon" className="md:hidden">
+                    <Menu className="h-5 w-5" />
+                  </Button>
+                  <h1 className="text-lg font-semibold">
+                    Mimořádný rozvrh
+                  </h1>
+                </div>
+                <div className="flex items-center gap-2">
+                   <Button variant="ghost" size="icon" title="Nahlásit chybu">
+                    <AlertTriangle className="h-5 w-5 text-amber-500" />
+                    <span className="sr-only">Nahlásit chybu</span>
+                  </Button>
+                </div>
+              </header>
+            <div className="w-full flex justify-center pt-8">
+              <Alert className="max-w-100">
+                <InfoIcon />
+                <AlertTitle>Pozor!</AlertTitle>
+                <AlertDescription>
+                  Tento web není oficiální a není jakkoliv spojen se SPŠE Ječná.
+                </AlertDescription>
+              </Alert>
+            </div>
+              {children}
+              <footer className="text-center text-xs text-white/70 pb-4">
+                &copy; 2026{" "}
+                <a href="https://jzitnik.dev" target="_blank" className="underline hover:text-white/90">Jakub Žitník</a>{" "}
+                •{" "}
+                <a href="https://www.gnu.org/licenses/gpl-3.0.html" target="_blank" className="underline hover:text-white/90">Licencováno pod GNU GPL v3.0</a>
+              </footer>
+            </div>
+          <Toaster />
+        </ThemeProvider>
+      </body>
+    </html>
+  );
+}
--- a/viewer/app/page.tsx
+++ b/viewer/app/page.tsx
@@ -0,0 +1,8 @@
+import { getData } from "@/lib/api";
+import View from "./view";
+
+export default async function Page() {
+  const data = await getData();
+
+  return <View data={data} />
+}
--- a/viewer/app/view.tsx
+++ b/viewer/app/view.tsx
@@ -0,0 +1,156 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { useForm } from "react-hook-form";
+import { Button } from "@/components/ui/button";
+import {
+  Form,
+  FormControl,
+  FormDescription,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { Input } from "@/components/ui/input";
+import { SubstitutionData, LocalData } from "@/lib/types";
+import { Card, CardContent } from "@/components/ui/card";
+import ScheduleViewer from "@/components/own/schedule-viewer";
+
+interface ViewProps {
+  data: SubstitutionData | null;
+}
+
+interface FormValues {
+  className: string;
+  jsonFile: FileList | null;
+}
+
+export default function View({ data }: ViewProps) {
+  const [loading, setLoading] = useState(true);
+  const [localData, setLocalData] = useState<LocalData | null>(null);
+
+  const form = useForm<FormValues>({
+    defaultValues: {
+      className: "",
+      jsonFile: null,
+    },
+  });
+
+  const onSubmit = async (values: FormValues) => {
+    const classNameProcessed = values.className.toLowerCase();
+
+    const file = values.jsonFile?.[0];
+    if (!file) {
+      alert("No file uploaded!");
+      return;
+    }
+
+    try {
+      const text = await file.text();
+      const jsonData = JSON.parse(text);
+      console.log(jsonData)
+      
+      const foundKey = Object.keys(jsonData).find(k => k.toLowerCase() === classNameProcessed);
+
+      if (!foundKey) {
+        alert("Class not found in file!");
+        return;
+      }
+
+      const data = {
+        class: classNameProcessed,
+        timetable: jsonData[foundKey]
+      };
+
+      setLocalData(data);
+      localStorage.setItem("data", JSON.stringify(data));
+
+    } catch (err) {
+      console.log(err)
+      alert("Invalid JSON file.");
+    }
+  };
+
+  useEffect(() => {
+    const saved = localStorage.getItem("data");
+    if (saved) {
+      setLocalData(JSON.parse(saved));
+    }
+    setLoading(false);
+  }, [data]);
+
+  if (loading) return <p>Loading...</p>;
+
+  if (!localData) {
+    return (
+      <div className="flex justify-center w-full">
+        <Card className="my-8 max-w-200">
+          <CardContent>
+            <Form {...form} >
+              <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+                <FormField
+                  control={form.control}
+                  name="className"
+                  rules={{
+                    required: "Třída je povinná",
+                    pattern: {
+                      value: /^[AEC][1-4][a-c]?$/i,
+                      message: "Neplatný název třídy"
+                    },
+                  }}
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Třída</FormLabel>
+                      <FormControl>
+                        <Input {...field} placeholder="C2c" />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+
+                <FormField
+                  control={form.control}
+                  name="jsonFile"
+                  rules={{ required: "Soubor je povinný" }}
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Soubor</FormLabel>
+                      <FormControl>
+                        <input
+                          type="file"
+                          accept=".json"
+                          onChange={(e) => field.onChange(e.target.files)}
+                          className="cursor-pointer"
+                        />
+                      </FormControl>
+                      <FormDescription>
+                        <a href="/posts/viewer/getting_file" target="_blank" className="hover:underline">
+                          Jak získat soubor?
+                        </a>
+                      </FormDescription>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+
+                <Button type="submit" className="cursor-pointer">Odeslat</Button>
+              </form>
+            </Form>
+          </CardContent>
+        </Card>
+      </div>
+    );
+  }
+
+  return (
+    <div className="w-full max-w-[1920px] mx-auto p-4 space-y-6">
+      <div className="flex justify-between items-center">
+        <h1 className="text-2xl font-bold">Rozvrh třídy {localData.class}</h1>
+        <Button variant="outline" onClick={() => setLocalData(null)}>Změnit třídu/soubor</Button>
+      </div>
+      <ScheduleViewer localData={localData} substitutionData={data} />
+    </div>
+  );
+}
--- a/viewer/components.json
+++ b/viewer/components.json
@@ -0,0 +1,23 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "app/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "rtl": false,
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "registries": {}
+}
--- a/viewer/components/own/schedule-viewer.tsx
+++ b/viewer/components/own/schedule-viewer.tsx
@@ -0,0 +1,182 @@
+'use client';
+
+import { useMemo } from 'react';
+import { format, startOfWeek, addDays, parseISO } from 'date-fns';
+import { cs } from 'date-fns/locale';
+import { LocalData, SubstitutionData, ChangeEntry, Hour } from '@/lib/types';
+import { Card } from '@/components/ui/card';
+
+interface ScheduleViewerProps {
+  localData: LocalData;
+  substitutionData: SubstitutionData | null;
+}
+
+function getChangesForClass(changes: Record<string, (ChangeEntry | null)[]> | undefined, className: string): (ChangeEntry | null)[] {
+  if (!changes) return [];
+  
+  if (changes[className]) return changes[className];
+  
+  const key = Object.keys(changes).find(k => k.toLowerCase() === className.toLowerCase());
+  if (key) return changes[key];
+  
+  return [];
+}
+
+export default function ScheduleViewer({ localData, substitutionData }: ScheduleViewerProps) {
+  const referenceDate = useMemo(() => {
+    if (substitutionData?.schedule) {
+      const dates = Object.keys(substitutionData.schedule).sort();
+      if (dates.length > 0) {
+        return parseISO(dates[0]);
+      }
+    }
+    return new Date();
+  }, [substitutionData]);
+
+  const mondayDate = useMemo(() => {
+    return startOfWeek(referenceDate, { weekStartsOn: 1 });
+  }, [referenceDate]);
+
+  const weekDays = useMemo(() => {
+    return Array.from({ length: 5 }, (_, i) => addDays(mondayDate, i));
+  }, [mondayDate]);
+
+  const maxHours = useMemo(() => {
+    let max = 0;
+    localData.timetable.forEach(day => {
+      if (day.length > max) max = day.length;
+    });
+    return max;
+  }, [localData]);
+
+  const currentWeekMaxHours = useMemo(() => {
+    let max = maxHours;
+    if (substitutionData?.schedule) {
+      weekDays.forEach(date => {
+        const dateStr = format(date, 'yyyy-MM-dd');
+        const dayData = substitutionData.schedule[dateStr];
+        if (dayData && dayData.changes) {
+           const changes = getChangesForClass(dayData.changes, localData.class);
+           if (changes.length > max) max = changes.length;
+        }
+      });
+    }
+    return max;
+  }, [maxHours, substitutionData, weekDays, localData.class]);
+
+  const hours = Array.from({ length: currentWeekMaxHours }, (_, i) => i + 1);
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+         <div className="text-sm text-muted-foreground">
+           Zobrazen týden od {format(mondayDate, 'd. M.', { locale: cs })} do {format(weekDays[4], 'd. M. yyyy', { locale: cs })}
+        </div>
+      </div>
+
+      <Card className="overflow-hidden border p-0">
+        <div className="overflow-x-auto">
+          <table className="w-full text-sm text-left border-collapse">
+            <thead>
+              <tr>
+                <th className="p-3 font-semibold border-b border-r min-w-[100px] text-center">
+                  Den
+                </th>
+                {hours.map(h => (
+                  <th key={h} className="p-3 font-semibold border-b border-r min-w-[120px] text-center">
+                    {h}
+                  </th>
+                ))}
+              </tr>
+            </thead>
+            <tbody>
+              {weekDays.map((date, dayIndex) => {
+                const dateStr = format(date, 'yyyy-MM-dd');
+                const dayName = format(date, 'EEEE', { locale: cs });
+                
+                const staticDay = localData.timetable[dayIndex] || [];
+                
+                const dynamicDay = substitutionData?.schedule?.[dateStr];
+                const changes = getChangesForClass(dynamicDay?.changes, localData.class);
+
+                const has3 = hours.some((_, hourIndex) => staticDay[hourIndex].length == 3);
+
+                return (
+                  <tr key={dateStr} className="border-b last:border-0 group hover:bg-muted/5" style={{height: has3 ? "120px" : "80px"}}>
+                    <td className="p-3 font-medium border-r text-center">
+                      <div className="capitalize">{dayName}</div>
+                      <div className="text-xs text-muted-foreground">{format(date, 'd. M.')}</div>
+                    </td>
+                    {hours.map((_, hourIndex) => {
+                      const change = changes[hourIndex];
+                      const staticLessons = staticDay[hourIndex] || [];
+                      
+                      return (
+                        <td key={hourIndex} className="border-r min-w-[120px] h-full align-top relative p-0">
+                          <CellContent 
+                            staticLessons={staticLessons} 
+                            change={change} 
+                          />
+                        </td>
+                      );
+                    })}
+                  </tr>
+                );
+              })}
+            </tbody>
+          </table>
+        </div>
+      </Card>
+    </div>
+  );
+}
+
+function CellContent({ staticLessons, change }: { staticLessons: Hour[], change: ChangeEntry | null | undefined }) {
+  if (change) {
+    return (
+      <div 
+        className="w-full h-full p-2 text-xs flex items-center justify-center text-center font-medium shadow-sm"
+        style={{
+          backgroundColor: change.backgroundColor || '#f0f0f0',
+          color: change.foregroundColor ? "#" + change.foregroundColor.substring(3, 6) : '#000',
+        }}
+      >
+        {change.text}
+      </div>
+    );
+  }
+
+  if (!staticLessons || staticLessons.length === 0) {
+    return null;
+  }
+
+  if (staticLessons.length > 1) {
+    return (
+      <div className="flex flex-col min-h-[80px] h-full">
+        {staticLessons.map((lesson, idx) => (
+          <div key={idx} className="flex-1 flex flex-col justify-between p-1 text-[10px] border-b min-h-[40px]">
+             <div className='flex justify-between'>
+               <div className="font-bold truncate">{lesson.subject}</div>
+               <span className="truncate opacity-70">{lesson.teacher.code}</span>
+             </div>
+             <div className="flex justify-between">
+               <span className="truncate max-w-[40px]">{lesson.room}</span>
+               <span className="truncate opacity-70">{lesson.group}</span>
+             </div>
+          </div>
+        ))}
+      </div>
+    );
+  }
+
+  const lesson = staticLessons[0];
+  return (
+    <div className="w-full min-h-[80px] h-full p-2 border-b flex flex-col justify-between text-xs hover:shadow-md transition-shadow">
+      <div className="font-bold text-lg text-primary">{lesson.subject}</div>
+      <div className="flex justify-between items-end mt-1">
+        <div className="font-mono font-medium">{lesson.room}</div>
+        <div className="text-[10px] opacity-80" title={lesson.teacher.name}>{lesson.teacher.code}</div>
+      </div>
+    </div>
+  );
+}
--- a/viewer/components/own/takes-place.tsx
+++ b/viewer/components/own/takes-place.tsx
@@ -0,0 +1,16 @@
+import { Card, CardContent, CardHeader, CardTitle } from "../ui/card";
+
+export default function TakesPlace({string}: {string: string}) {
+   return (
+     <Card>
+      <CardHeader>
+        <CardTitle>Koná se</CardTitle>
+      </CardHeader>
+      <CardContent>
+        <p className="text-sm text-slate-700 dark:text-slate-300">
+          {string}
+        </p>
+      </CardContent>
+    </Card>
+  );
+}
--- a/viewer/components/own/teacher-absence.tsx
+++ b/viewer/components/own/teacher-absence.tsx
@@ -0,0 +1,34 @@
+import { AbsenceEntry } from "@/lib/types";
+import { Card, CardContent } from "../ui/card";
+
+export function TeacherAbsenceItem({ entry }: { entry: AbsenceEntry }) {
+  const getTeacherName = (e: AbsenceEntry) => {
+      if (e.type === 'invalid') return null;
+      return e.teacher;
+  };
+
+  const teacherName = getTeacherName(entry) || 'Neznámý';
+
+  const getTypeDescription = (e: AbsenceEntry) => {
+    switch (e.type) {
+      case 'wholeDay': return 'Celý den';
+      case 'single': return `${e.hours}. hodinu`;
+      case 'range': return `${e.hours.from}-${e.hours.to} hodinu`;
+      case 'exkurze': return 'Na exkurzi'; 
+      case 'zastoupen': return `Zastoupen (${e.zastupuje.teacher || 'Neznámý'})`;
+      case 'invalid': return `Neplatný záznam: ${e.original}`;
+      default: return 'Neznámý';
+    }
+  };
+
+  return (
+    <Card>
+      <CardContent>
+        <div className="font-bold text-base text-slate-800 dark:text-slate-200">{teacherName}</div>
+        <div className="text-sm text-slate-500 dark:text-slate-400">
+          {getTypeDescription(entry)}
+        </div>
+      </CardContent>
+    </Card>
+  );
+}
--- a/viewer/components/theme-provider.tsx
+++ b/viewer/components/theme-provider.tsx
@@ -0,0 +1,11 @@
+"use client"
+
+import * as React from "react"
+import { ThemeProvider as NextThemesProvider } from "next-themes"
+
+export function ThemeProvider({
+  children,
+  ...props
+}: React.ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}
--- a/viewer/components/ui/alert.tsx
+++ b/viewer/components/ui/alert.tsx
@@ -0,0 +1,66 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const alertVariants = cva(
+  "relative w-full rounded-lg border px-4 py-3 text-sm grid has-[>svg]:grid-cols-[calc(var(--spacing)*4)_1fr] grid-cols-[0_1fr] has-[>svg]:gap-x-3 gap-y-0.5 items-start [&>svg]:size-4 [&>svg]:translate-y-0.5 [&>svg]:text-current",
+  {
+    variants: {
+      variant: {
+        default: "bg-card text-card-foreground",
+        destructive:
+          "text-destructive bg-card [&>svg]:text-current *:data-[slot=alert-description]:text-destructive/90",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+function Alert({
+  className,
+  variant,
+  ...props
+}: React.ComponentProps<"div"> & VariantProps<typeof alertVariants>) {
+  return (
+    <div
+      data-slot="alert"
+      role="alert"
+      className={cn(alertVariants({ variant }), className)}
+      {...props}
+    />
+  )
+}
+
+function AlertTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-title"
+      className={cn(
+        "col-start-2 line-clamp-1 min-h-4 font-medium tracking-tight",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDescription({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-description"
+      className={cn(
+        "text-muted-foreground col-start-2 grid justify-items-start gap-1 text-sm [&_p]:leading-relaxed",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Alert, AlertTitle, AlertDescription }
--- a/viewer/components/ui/button.tsx
+++ b/viewer/components/ui/button.tsx
@@ -0,0 +1,64 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+import { Slot } from "radix-ui"
+
+import { cn } from "@/lib/utils"
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
+        destructive:
+          "bg-destructive text-white hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60",
+        outline:
+          "border bg-background shadow-xs hover:bg-accent hover:text-accent-foreground dark:bg-input/30 dark:border-input dark:hover:bg-input/50",
+        secondary:
+          "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost:
+          "hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default: "h-9 px-4 py-2 has-[>svg]:px-3",
+        xs: "h-6 gap-1 rounded-md px-2 text-xs has-[>svg]:px-1.5 [&_svg:not([class*='size-'])]:size-3",
+        sm: "h-8 rounded-md gap-1.5 px-3 has-[>svg]:px-2.5",
+        lg: "h-10 rounded-md px-6 has-[>svg]:px-4",
+        icon: "size-9",
+        "icon-xs": "size-6 rounded-md [&_svg:not([class*='size-'])]:size-3",
+        "icon-sm": "size-8",
+        "icon-lg": "size-10",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function Button({
+  className,
+  variant = "default",
+  size = "default",
+  asChild = false,
+  ...props
+}: React.ComponentProps<"button"> &
+  VariantProps<typeof buttonVariants> & {
+    asChild?: boolean
+  }) {
+  const Comp = asChild ? Slot.Root : "button"
+
+  return (
+    <Comp
+      data-slot="button"
+      data-variant={variant}
+      data-size={size}
+      className={cn(buttonVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Button, buttonVariants }
--- a/viewer/components/ui/card.tsx
+++ b/viewer/components/ui/card.tsx
@@ -0,0 +1,92 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Card({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card"
+      className={cn(
+        "bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-header"
+      className={cn(
+        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-title"
+      className={cn("leading-none font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-description"
+      className={cn("text-muted-foreground text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+function CardAction({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-action"
+      className={cn(
+        "col-start-2 row-span-2 row-start-1 self-start justify-self-end",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardContent({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-content"
+      className={cn("px-6", className)}
+      {...props}
+    />
+  )
+}
+
+function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-footer"
+      className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Card,
+  CardHeader,
+  CardFooter,
+  CardTitle,
+  CardAction,
+  CardDescription,
+  CardContent,
+}
--- a/viewer/components/ui/dialog.tsx
+++ b/viewer/components/ui/dialog.tsx
@@ -0,0 +1,158 @@
+"use client"
+
+import * as React from "react"
+import { XIcon } from "lucide-react"
+import { Dialog as DialogPrimitive } from "radix-ui"
+
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+
+function Dialog({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Root>) {
+  return <DialogPrimitive.Root data-slot="dialog" {...props} />
+}
+
+function DialogTrigger({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Trigger>) {
+  return <DialogPrimitive.Trigger data-slot="dialog-trigger" {...props} />
+}
+
+function DialogPortal({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Portal>) {
+  return <DialogPrimitive.Portal data-slot="dialog-portal" {...props} />
+}
+
+function DialogClose({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Close>) {
+  return <DialogPrimitive.Close data-slot="dialog-close" {...props} />
+}
+
+function DialogOverlay({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Overlay>) {
+  return (
+    <DialogPrimitive.Overlay
+      data-slot="dialog-overlay"
+      className={cn(
+        "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DialogContent({
+  className,
+  children,
+  showCloseButton = true,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Content> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <DialogPortal data-slot="dialog-portal">
+      <DialogOverlay />
+      <DialogPrimitive.Content
+        data-slot="dialog-content"
+        className={cn(
+          "bg-background data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border p-6 shadow-lg duration-200 outline-none sm:max-w-lg",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        {showCloseButton && (
+          <DialogPrimitive.Close
+            data-slot="dialog-close"
+            className="ring-offset-background focus:ring-ring data-[state=open]:bg-accent data-[state=open]:text-muted-foreground absolute top-4 right-4 rounded-xs opacity-70 transition-opacity hover:opacity-100 focus:ring-2 focus:ring-offset-2 focus:outline-hidden disabled:pointer-events-none [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4"
+          >
+            <XIcon />
+            <span className="sr-only">Close</span>
+          </DialogPrimitive.Close>
+        )}
+      </DialogPrimitive.Content>
+    </DialogPortal>
+  )
+}
+
+function DialogHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="dialog-header"
+      className={cn("flex flex-col gap-2 text-center sm:text-left", className)}
+      {...props}
+    />
+  )
+}
+
+function DialogFooter({
+  className,
+  showCloseButton = false,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <div
+      data-slot="dialog-footer"
+      className={cn(
+        "flex flex-col-reverse gap-2 sm:flex-row sm:justify-end",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      {showCloseButton && (
+        <DialogPrimitive.Close asChild>
+          <Button variant="outline">Close</Button>
+        </DialogPrimitive.Close>
+      )}
+    </div>
+  )
+}
+
+function DialogTitle({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Title>) {
+  return (
+    <DialogPrimitive.Title
+      data-slot="dialog-title"
+      className={cn("text-lg leading-none font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function DialogDescription({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Description>) {
+  return (
+    <DialogPrimitive.Description
+      data-slot="dialog-description"
+      className={cn("text-muted-foreground text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogOverlay,
+  DialogPortal,
+  DialogTitle,
+  DialogTrigger,
+}
--- a/viewer/components/ui/form.tsx
+++ b/viewer/components/ui/form.tsx
@@ -0,0 +1,167 @@
+"use client"
+
+import * as React from "react"
+import type { Label as LabelPrimitive } from "radix-ui"
+import { Slot } from "radix-ui"
+import {
+  Controller,
+  FormProvider,
+  useFormContext,
+  useFormState,
+  type ControllerProps,
+  type FieldPath,
+  type FieldValues,
+} from "react-hook-form"
+
+import { cn } from "@/lib/utils"
+import { Label } from "@/components/ui/label"
+
+const Form = FormProvider
+
+type FormFieldContextValue<
+  TFieldValues extends FieldValues = FieldValues,
+  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
+> = {
+  name: TName
+}
+
+const FormFieldContext = React.createContext<FormFieldContextValue>(
+  {} as FormFieldContextValue
+)
+
+const FormField = <
+  TFieldValues extends FieldValues = FieldValues,
+  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
+>({
+  ...props
+}: ControllerProps<TFieldValues, TName>) => {
+  return (
+    <FormFieldContext.Provider value={{ name: props.name }}>
+      <Controller {...props} />
+    </FormFieldContext.Provider>
+  )
+}
+
+const useFormField = () => {
+  const fieldContext = React.useContext(FormFieldContext)
+  const itemContext = React.useContext(FormItemContext)
+  const { getFieldState } = useFormContext()
+  const formState = useFormState({ name: fieldContext.name })
+  const fieldState = getFieldState(fieldContext.name, formState)
+
+  if (!fieldContext) {
+    throw new Error("useFormField should be used within <FormField>")
+  }
+
+  const { id } = itemContext
+
+  return {
+    id,
+    name: fieldContext.name,
+    formItemId: `${id}-form-item`,
+    formDescriptionId: `${id}-form-item-description`,
+    formMessageId: `${id}-form-item-message`,
+    ...fieldState,
+  }
+}
+
+type FormItemContextValue = {
+  id: string
+}
+
+const FormItemContext = React.createContext<FormItemContextValue>(
+  {} as FormItemContextValue
+)
+
+function FormItem({ className, ...props }: React.ComponentProps<"div">) {
+  const id = React.useId()
+
+  return (
+    <FormItemContext.Provider value={{ id }}>
+      <div
+        data-slot="form-item"
+        className={cn("grid gap-2", className)}
+        {...props}
+      />
+    </FormItemContext.Provider>
+  )
+}
+
+function FormLabel({
+  className,
+  ...props
+}: React.ComponentProps<typeof LabelPrimitive.Root>) {
+  const { error, formItemId } = useFormField()
+
+  return (
+    <Label
+      data-slot="form-label"
+      data-error={!!error}
+      className={cn("data-[error=true]:text-destructive", className)}
+      htmlFor={formItemId}
+      {...props}
+    />
+  )
+}
+
+function FormControl({ ...props }: React.ComponentProps<typeof Slot.Root>) {
+  const { error, formItemId, formDescriptionId, formMessageId } = useFormField()
+
+  return (
+    <Slot.Root
+      data-slot="form-control"
+      id={formItemId}
+      aria-describedby={
+        !error
+          ? `${formDescriptionId}`
+          : `${formDescriptionId} ${formMessageId}`
+      }
+      aria-invalid={!!error}
+      {...props}
+    />
+  )
+}
+
+function FormDescription({ className, ...props }: React.ComponentProps<"p">) {
+  const { formDescriptionId } = useFormField()
+
+  return (
+    <p
+      data-slot="form-description"
+      id={formDescriptionId}
+      className={cn("text-muted-foreground text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+function FormMessage({ className, ...props }: React.ComponentProps<"p">) {
+  const { error, formMessageId } = useFormField()
+  const body = error ? String(error?.message ?? "") : props.children
+
+  if (!body) {
+    return null
+  }
+
+  return (
+    <p
+      data-slot="form-message"
+      id={formMessageId}
+      className={cn("text-destructive text-sm", className)}
+      {...props}
+    >
+      {body}
+    </p>
+  )
+}
+
+export {
+  useFormField,
+  Form,
+  FormItem,
+  FormLabel,
+  FormControl,
+  FormDescription,
+  FormMessage,
+  FormField,
+}
--- a/viewer/components/ui/input.tsx
+++ b/viewer/components/ui/input.tsx
@@ -0,0 +1,21 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+  return (
+    <input
+      type={type}
+      data-slot="input"
+      className={cn(
+        "file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input h-9 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        "focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px]",
+        "aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Input }
--- a/viewer/components/ui/label.tsx
+++ b/viewer/components/ui/label.tsx
@@ -0,0 +1,24 @@
+"use client"
+
+import * as React from "react"
+import { Label as LabelPrimitive } from "radix-ui"
+
+import { cn } from "@/lib/utils"
+
+function Label({
+  className,
+  ...props
+}: React.ComponentProps<typeof LabelPrimitive.Root>) {
+  return (
+    <LabelPrimitive.Root
+      data-slot="label"
+      className={cn(
+        "flex items-center gap-2 text-sm leading-none font-medium select-none group-data-[disabled=true]:pointer-events-none group-data-[disabled=true]:opacity-50 peer-disabled:cursor-not-allowed peer-disabled:opacity-50",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Label }
--- a/viewer/components/ui/radio-group.tsx
+++ b/viewer/components/ui/radio-group.tsx
@@ -0,0 +1,45 @@
+"use client"
+
+import * as React from "react"
+import { CircleIcon } from "lucide-react"
+import { RadioGroup as RadioGroupPrimitive } from "radix-ui"
+
+import { cn } from "@/lib/utils"
+
+function RadioGroup({
+  className,
+  ...props
+}: React.ComponentProps<typeof RadioGroupPrimitive.Root>) {
+  return (
+    <RadioGroupPrimitive.Root
+      data-slot="radio-group"
+      className={cn("grid gap-3", className)}
+      {...props}
+    />
+  )
+}
+
+function RadioGroupItem({
+  className,
+  ...props
+}: React.ComponentProps<typeof RadioGroupPrimitive.Item>) {
+  return (
+    <RadioGroupPrimitive.Item
+      data-slot="radio-group-item"
+      className={cn(
+        "border-input text-primary focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 aspect-square size-4 shrink-0 rounded-full border shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    >
+      <RadioGroupPrimitive.Indicator
+        data-slot="radio-group-indicator"
+        className="relative flex items-center justify-center"
+      >
+        <CircleIcon className="fill-primary absolute top-1/2 left-1/2 size-2 -translate-x-1/2 -translate-y-1/2" />
+      </RadioGroupPrimitive.Indicator>
+    </RadioGroupPrimitive.Item>
+  )
+}
+
+export { RadioGroup, RadioGroupItem }
--- a/viewer/components/ui/select.tsx
+++ b/viewer/components/ui/select.tsx
@@ -0,0 +1,190 @@
+"use client"
+
+import * as React from "react"
+import { CheckIcon, ChevronDownIcon, ChevronUpIcon } from "lucide-react"
+import { Select as SelectPrimitive } from "radix-ui"
+
+import { cn } from "@/lib/utils"
+
+function Select({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Root>) {
+  return <SelectPrimitive.Root data-slot="select" {...props} />
+}
+
+function SelectGroup({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Group>) {
+  return <SelectPrimitive.Group data-slot="select-group" {...props} />
+}
+
+function SelectValue({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Value>) {
+  return <SelectPrimitive.Value data-slot="select-value" {...props} />
+}
+
+function SelectTrigger({
+  className,
+  size = "default",
+  children,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Trigger> & {
+  size?: "sm" | "default"
+}) {
+  return (
+    <SelectPrimitive.Trigger
+      data-slot="select-trigger"
+      data-size={size}
+      className={cn(
+        "border-input data-[placeholder]:text-muted-foreground [&_svg:not([class*='text-'])]:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 dark:hover:bg-input/50 flex w-fit items-center justify-between gap-2 rounded-md border bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <SelectPrimitive.Icon asChild>
+        <ChevronDownIcon className="size-4 opacity-50" />
+      </SelectPrimitive.Icon>
+    </SelectPrimitive.Trigger>
+  )
+}
+
+function SelectContent({
+  className,
+  children,
+  position = "item-aligned",
+  align = "center",
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Content>) {
+  return (
+    <SelectPrimitive.Portal>
+      <SelectPrimitive.Content
+        data-slot="select-content"
+        className={cn(
+          "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 relative z-50 max-h-(--radix-select-content-available-height) min-w-[8rem] origin-(--radix-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border shadow-md",
+          position === "popper" &&
+            "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+          className
+        )}
+        position={position}
+        align={align}
+        {...props}
+      >
+        <SelectScrollUpButton />
+        <SelectPrimitive.Viewport
+          className={cn(
+            "p-1",
+            position === "popper" &&
+              "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)] scroll-my-1"
+          )}
+        >
+          {children}
+        </SelectPrimitive.Viewport>
+        <SelectScrollDownButton />
+      </SelectPrimitive.Content>
+    </SelectPrimitive.Portal>
+  )
+}
+
+function SelectLabel({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Label>) {
+  return (
+    <SelectPrimitive.Label
+      data-slot="select-label"
+      className={cn("text-muted-foreground px-2 py-1.5 text-xs", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectItem({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Item>) {
+  return (
+    <SelectPrimitive.Item
+      data-slot="select-item"
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground [&_svg:not([class*='text-'])]:text-muted-foreground relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 *:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2",
+        className
+      )}
+      {...props}
+    >
+      <span
+        data-slot="select-item-indicator"
+        className="absolute right-2 flex size-3.5 items-center justify-center"
+      >
+        <SelectPrimitive.ItemIndicator>
+          <CheckIcon className="size-4" />
+        </SelectPrimitive.ItemIndicator>
+      </span>
+      <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+    </SelectPrimitive.Item>
+  )
+}
+
+function SelectSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Separator>) {
+  return (
+    <SelectPrimitive.Separator
+      data-slot="select-separator"
+      className={cn("bg-border pointer-events-none -mx-1 my-1 h-px", className)}
+      {...props}
+    />
+  )
+}
+
+function SelectScrollUpButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollUpButton>) {
+  return (
+    <SelectPrimitive.ScrollUpButton
+      data-slot="select-scroll-up-button"
+      className={cn(
+        "flex cursor-default items-center justify-center py-1",
+        className
+      )}
+      {...props}
+    >
+      <ChevronUpIcon className="size-4" />
+    </SelectPrimitive.ScrollUpButton>
+  )
+}
+
+function SelectScrollDownButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollDownButton>) {
+  return (
+    <SelectPrimitive.ScrollDownButton
+      data-slot="select-scroll-down-button"
+      className={cn(
+        "flex cursor-default items-center justify-center py-1",
+        className
+      )}
+      {...props}
+    >
+      <ChevronDownIcon className="size-4" />
+    </SelectPrimitive.ScrollDownButton>
+  )
+}
+
+export {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectScrollDownButton,
+  SelectScrollUpButton,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+}
--- a/viewer/components/ui/sonner.tsx
+++ b/viewer/components/ui/sonner.tsx
@@ -0,0 +1,40 @@
+"use client"
+
+import {
+  CircleCheckIcon,
+  InfoIcon,
+  Loader2Icon,
+  OctagonXIcon,
+  TriangleAlertIcon,
+} from "lucide-react"
+import { useTheme } from "next-themes"
+import { Toaster as Sonner, type ToasterProps } from "sonner"
+
+const Toaster = ({ ...props }: ToasterProps) => {
+  const { theme = "system" } = useTheme()
+
+  return (
+    <Sonner
+      theme={theme as ToasterProps["theme"]}
+      className="toaster group"
+      icons={{
+        success: <CircleCheckIcon className="size-4" />,
+        info: <InfoIcon className="size-4" />,
+        warning: <TriangleAlertIcon className="size-4" />,
+        error: <OctagonXIcon className="size-4" />,
+        loading: <Loader2Icon className="size-4 animate-spin" />,
+      }}
+      style={
+        {
+          "--normal-bg": "var(--popover)",
+          "--normal-text": "var(--popover-foreground)",
+          "--normal-border": "var(--border)",
+          "--border-radius": "var(--radius)",
+        } as React.CSSProperties
+      }
+      {...props}
+    />
+  )
+}
+
+export { Toaster }
--- a/viewer/components/ui/textarea.tsx
+++ b/viewer/components/ui/textarea.tsx
@@ -0,0 +1,18 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "border-input placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 flex field-sizing-content min-h-16 w-full rounded-md border bg-transparent px-3 py-2 text-base shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Textarea }
--- a/viewer/eslint.config.mjs
+++ b/viewer/eslint.config.mjs
@@ -0,0 +1,18 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+  ]),
+]);
+
+export default eslintConfig;
--- a/viewer/lib/api.ts
+++ b/viewer/lib/api.ts
@@ -0,0 +1,17 @@
+import { SubstitutionData } from "./types";
+
+export async function getData(): Promise<SubstitutionData | null> {
+  try {
+    const res = await fetch('http://localhost:3000/versioned/v3', {
+      next: { revalidate: 60 },
+    });
+    
+    if (!res.ok) {
+      return null;
+    }
+    
+    return res.json();
+  } catch {
+    return null;
+  }
+}
--- a/viewer/lib/types.ts
+++ b/viewer/lib/types.ts
@@ -0,0 +1,49 @@
+export interface TeacherReference {
+  name: string;
+  code: string;
+}
+
+export type AbsenceEntry =
+  | { type: 'wholeDay'; teacher: string; teacherCode: string }
+  | { type: 'single'; teacher: string; teacherCode: string; hours: string }
+  | { type: 'range'; teacher: string; teacherCode: string; hours: { from: string; to: string } }
+  | { type: 'exkurze'; teacher: string; teacherCode: string }
+  | { type: 'zastoupen'; teacher: string; teacherCode: string; zastupuje: { teacher: string | null } }
+  | { type: 'invalid'; original: string; teacher?: null; teacherCode?: null };
+
+export interface ChangeEntry {
+  text: string;
+  backgroundColor?: string | null;
+  foregroundColor?: string | null;
+}
+
+export interface SubstitutionDayData {
+  info: { inWork: boolean };
+  takesPlace: string;
+  changes: Record<string, (ChangeEntry | null)[]>;
+  absence: AbsenceEntry[];
+}
+
+export interface SubstitutionData {
+  status: {
+    currentUpdateSchedule: number;
+    lastUpdated: string;
+  }
+  schedule: Record<string, SubstitutionDayData>;
+}
+
+export interface Hour {
+  subject: string;
+  title: string;
+  teacher: {
+    code: string;
+    name: string;
+  }
+  group?: string;
+  room: string;
+}
+
+export interface LocalData {
+  class: string;
+  timetable: Hour[][][];
+}
--- a/viewer/lib/utils.ts
+++ b/viewer/lib/utils.ts
@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}
--- a/viewer/next.config.ts
+++ b/viewer/next.config.ts
@@ -0,0 +1,11 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  reactCompiler: true,
+  basePath: '/viewer',
+  turbopack: {
+    root: __dirname,
+  },
+};
+
+export default nextConfig;
--- a/viewer/package-lock.json
+++ b/viewer/package-lock.json
--- a/viewer/package.json
+++ b/viewer/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "viewer",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint"
+  },
+  "dependencies": {
+    "@hookform/resolvers": "^5.2.2",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "date-fns": "^4.1.0",
+    "lucide-react": "^0.563.0",
+    "next": "16.1.6",
+    "next-themes": "^0.4.6",
+    "radix-ui": "^1.4.3",
+    "react": "19.2.3",
+    "react-dom": "19.2.3",
+    "react-hook-form": "^7.71.1",
+    "sonner": "^2.0.7",
+    "tailwind-merge": "^3.4.0",
+    "zod": "^4.3.6"
+  },
+  "devDependencies": {
+    "@tailwindcss/postcss": "^4",
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "babel-plugin-react-compiler": "1.0.0",
+    "eslint": "^9",
+    "eslint-config-next": "16.1.6",
+    "shadcn": "^3.8.4",
+    "tailwindcss": "^4",
+    "tw-animate-css": "^1.4.0",
+    "typescript": "^5"
+  }
+}
--- a/viewer/postcss.config.mjs
+++ b/viewer/postcss.config.mjs
@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;
--- a/viewer/public/file.svg
+++ b/viewer/public/file.svg
@@ -0,0 +1 @@
+<svg fill="none" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="M14.5 13.5V5.41a1 1 0 0 0-.3-.7L9.8.29A1 1 0 0 0 9.08 0H1.5v13.5A2.5 2.5 0 0 0 4 16h8a2.5 2.5 0 0 0 2.5-2.5m-1.5 0v-7H8v-5H3v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1M9.5 5V2.12L12.38 5zM5.13 5h-.62v1.25h2.12V5zm-.62 3h7.12v1.25H4.5zm.62 3h-.62v1.25h7.12V11z" clip-rule="evenodd" fill="#666" fill-rule="evenodd"/></svg>
--- a/viewer/public/globe.svg
+++ b/viewer/public/globe.svg
@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><g clip-path="url(#a)"><path fill-rule="evenodd" clip-rule="evenodd" d="M10.27 14.1a6.5 6.5 0 0 0 3.67-3.45q-1.24.21-2.7.34-.31 1.83-.97 3.1M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m.48-1.52a7 7 0 0 1-.96 0H7.5a4 4 0 0 1-.84-1.32q-.38-.89-.63-2.08a40 40 0 0 0 3.92 0q-.25 1.2-.63 2.08a4 4 0 0 1-.84 1.31zm2.94-4.76q1.66-.15 2.95-.43a7 7 0 0 0 0-2.58q-1.3-.27-2.95-.43a18 18 0 0 1 0 3.44m-1.27-3.54a17 17 0 0 1 0 3.64 39 39 0 0 1-4.3 0 17 17 0 0 1 0-3.64 39 39 0 0 1 4.3 0m1.1-1.17q1.45.13 2.69.34a6.5 6.5 0 0 0-3.67-3.44q.65 1.26.98 3.1M8.48 1.5l.01.02q.41.37.84 1.31.38.89.63 2.08a40 40 0 0 0-3.92 0q.25-1.2.63-2.08a4 4 0 0 1 .85-1.32 7 7 0 0 1 .96 0m-2.75.4a6.5 6.5 0 0 0-3.67 3.44 29 29 0 0 1 2.7-.34q.31-1.83.97-3.1M4.58 6.28q-1.66.16-2.95.43a7 7 0 0 0 0 2.58q1.3.27 2.95.43a18 18 0 0 1 0-3.44m.17 4.71q-1.45-.12-2.69-.34a6.5 6.5 0 0 0 3.67 3.44q-.65-1.27-.98-3.1" fill="#666"/></g><defs><clipPath id="a"><path fill="#fff" d="M0 0h16v16H0z"/></clipPath></defs></svg>
--- a/viewer/public/next.svg
+++ b/viewer/public/next.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 394 80"><path fill="#000" d="M262 0h68.5v12.7h-27.2v66.6h-13.6V12.7H262V0ZM149 0v12.7H94v20.4h44.3v12.6H94v21h55v12.6H80.5V0h68.7zm34.3 0h-17.8l63.8 79.4h17.9l-32-39.7 32-39.6h-17.9l-23 28.6-23-28.6zm18.3 56.7-9-11-27.1 33.7h17.8l18.3-22.7z"/><path fill="#000" d="M81 79.3 17 0H0v79.3h13.6V17l50.2 62.3H81Zm252.6-.4c-1 0-1.8-.4-2.5-1s-1.1-1.6-1.1-2.6.3-1.8 1-2.5 1.6-1 2.6-1 1.8.3 2.5 1a3.4 3.4 0 0 1 .6 4.3 3.7 3.7 0 0 1-3 1.8zm23.2-33.5h6v23.3c0 2.1-.4 4-1.3 5.5a9.1 9.1 0 0 1-3.8 3.5c-1.6.8-3.5 1.3-5.7 1.3-2 0-3.7-.4-5.3-1s-2.8-1.8-3.7-3.2c-.9-1.3-1.4-3-1.4-5h6c.1.8.3 1.6.7 2.2s1 1.2 1.6 1.5c.7.4 1.5.5 2.4.5 1 0 1.8-.2 2.4-.6a4 4 0 0 0 1.6-1.8c.3-.8.5-1.8.5-3V45.5zm30.9 9.1a4.4 4.4 0 0 0-2-3.3 7.5 7.5 0 0 0-4.3-1.1c-1.3 0-2.4.2-3.3.5-.9.4-1.6 1-2 1.6a3.5 3.5 0 0 0-.3 4c.3.5.7.9 1.3 1.2l1.8 1 2 .5 3.2.8c1.3.3 2.5.7 3.7 1.2a13 13 0 0 1 3.2 1.8 8.1 8.1 0 0 1 3 6.5c0 2-.5 3.7-1.5 5.1a10 10 0 0 1-4.4 3.5c-1.8.8-4.1 1.2-6.8 1.2-2.6 0-4.9-.4-6.8-1.2-2-.8-3.4-2-4.5-3.5a10 10 0 0 1-1.7-5.6h6a5 5 0 0 0 3.5 4.6c1 .4 2.2.6 3.4.6 1.3 0 2.5-.2 3.5-.6 1-.4 1.8-1 2.4-1.7a4 4 0 0 0 .8-2.4c0-.9-.2-1.6-.7-2.2a11 11 0 0 0-2.1-1.4l-3.2-1-3.8-1c-2.8-.7-5-1.7-6.6-3.2a7.2 7.2 0 0 1-2.4-5.7 8 8 0 0 1 1.7-5 10 10 0 0 1 4.3-3.5c2-.8 4-1.2 6.4-1.2 2.3 0 4.4.4 6.2 1.2 1.8.8 3.2 2 4.3 3.4 1 1.4 1.5 3 1.5 5h-5.8z"/></svg>
--- a/viewer/public/vercel.svg
+++ b/viewer/public/vercel.svg
@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>
--- a/viewer/public/window.svg
+++ b/viewer/public/window.svg
@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill-rule="evenodd" clip-rule="evenodd" d="M1.5 2.5h13v10a1 1 0 0 1-1 1h-11a1 1 0 0 1-1-1zM0 1h16v11.5a2.5 2.5 0 0 1-2.5 2.5h-11A2.5 2.5 0 0 1 0 12.5zm3.75 4.5a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5M7 4.75a.75.75 0 1 1-1.5 0 .75.75 0 0 1 1.5 0m1.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5" fill="#666"/></svg>
--- a/viewer/tsconfig.json
+++ b/viewer/tsconfig.json
@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./*"]
+    }
+  },
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts",
+    "**/*.mts"
+  ],
+  "exclude": ["node_modules"]
+}
--- a/web/content/posts/viewer/getting_file.md
+++ b/web/content/posts/viewer/getting_file.md
@@ -0,0 +1,33 @@
+---
+title: "Získání statického souboru"
+date: 2026-02-12
+hiddenInHomelist: true
+---
+
+Pokud si chcete zobrazit stálý rozvrh zároveň s mimořádným rozvrhem ve webovém rozhraní musíte si získat statický rozvrh. Ten získáte pomocí Node.js scriptu.
+
+## Požadavky
+
+Před začátkem se ujistěte, že máte připravené následující:
+
+- **Účet SPŠE Ječná**: Script vyžaduje platný školní účet a heslo.
+- **Node.js 22+**
+- **Git**
+
+## Stažení projektu
+
+```bash
+git clone https://gitea.jzitnik.dev/jzitnik/jecnarozvrh
+```
+
+## Stažení knihoven a spuštění scriptu
+
+```bash
+npm i
+
+npm run parse-timetable
+```
+
+Script se vás zeptá na username, password a output cestu k souboru.
+
+Script projde všechny učitele a sestaví rozvrh všech tříd podle toho.
--- a/web/content/posts/viewer/redirect.md
+++ b/web/content/posts/viewer/redirect.md
@@ -0,0 +1,4 @@
+---
+title: "Online verze"
+date: 2026-02-12
+---
				`@@ -0,0 +1 @@`
				`<svg fill="none" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="M14.5 13.5V5.41a1 1 0 0 0-.3-.7L9.8.29A1 1 0 0 0 9.08 0H1.5v13.5A2.5 2.5 0 0 0 4 16h8a2.5 2.5 0 0 0 2.5-2.5m-1.5 0v-7H8v-5H3v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1M9.5 5V2.12L12.38 5zM5.13 5h-.62v1.25h2.12V5zm-.62 3h7.12v1.25H4.5zm.62 3h-.62v1.25h7.12V11z" clip-rule="evenodd" fill="#666" fill-rule="evenodd"/></svg>`
				`@@ -0,0 +1 @@`
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