feat: new jumbotron page for dm hall screen

ARCHITECTURE.md

@@ -0,0 +1,38 @@
+# Architecture
+
+This is a Typescript project that Preact for the frontend and _server-side rendering_ (custom made).
+
+To use the project you just have to run
+
+```bash shell
+# Development
+$ npm run dev
+
+# Production
+$ npm run build
+$ npm run serve
+```
+
+Let's see what's inside the `package.json`
+
+```json
+...
+"scripts": {
+    "build:client": "vite build --outDir dist/entry-client",
+    "build:ssr": "vite build --ssr client/entry-server.tsx --outDir dist/entry-server",
+    "build:server": "esbuild server.ts --bundle --platform=node --format=esm --external:./node_modules/* --outdir=dist/server",
+    "build": "run-s build:client build:ssr build:server",
+    "dev": "run-s build:server serve:dev",
+    "serve:dev": "MODE=development node dist/server/server.js",
+    "serve": "node dist/server/server.js"
+},
+...
+```
+
+ma vediamolo meglio come diagramma
+
+![diagram](docs/out/package-json.svg)
+
+- Quando sviluppiamo abbiamo la regola `dev` che prima chiama la regola `build:server` che compila il file `server.ts` che contiene il vero e proprio server in ExpressJS che gestisce tutta l'applicazione. Internamente questo _entrypoint_ usa `server/` in fase di development usa ViteJS 
+
+- Il comando `build` invece prima costruisce il client utilizzando Vite, 

client/App.tsx

@@ -15,6 +15,7 @@ import { ProblemPage } from './pages/ProblemPage'
 import { ProfilePage } from './pages/ProfilePage'
 import { ScoresPage } from './pages/ScoresPage'
 import { UserPage } from './pages/UserPage'
+import { JumbotronPage } from './pages/JumbotronPage'
 
 // const Redirect = ({ to }: { to: string }) => {
 //     useEffect(() => {
@@ -61,6 +62,10 @@ export const App = ({ url }: { url?: string }) => {
                     // @ts-ignore
                     path={pbu('/problem/:id')}
                 />
+                <JumbotronPage
+                    // @ts-ignore
+                    path={pbu('/jumbotron')}
+                />
                 <UserPage
                     // @ts-ignore
                     path={pbu('/u/:uid')}

client/pages/JumbotronPage.tsx

@@ -0,0 +1,51 @@
+import { route } from 'preact-router'
+import { useContext, useEffect, useState } from 'preact/hooks'
+import { isAdministrator, Problem as ProblemModel, Solution as SolutionModel } from '../../shared/model'
+import { prependBaseUrl } from '../../shared/utils'
+import { server } from '../api'
+import { Header } from '../components/Header'
+import { MarkdownEditor } from '../components/MarkdownEditor'
+import { Problem } from '../components/Problem'
+import { Solution } from '../components/Solution'
+import { MetadataContext, useListResource, useResource, ServerContext, DatabaseContext, useServerAsyncCallback } from '../hooks'
+import { useLoggedInUser } from '../hooks/useCurrentUser'
+
+export const JumbotronPage = ({}) => {
+    const metadata = useContext(MetadataContext)
+    const db = useContext(DatabaseContext)
+    if (db) {
+        useServerAsyncCallback(async () => {
+            const problem = await db.getJumbotronProblem()
+            if (problem) {
+                metadata.title = `PHC Problemi | ${problem.title}`
+                metadata.description = problem.content
+            }
+        })
+    }
+
+    const [problem] = useResource<ProblemModel | null>(`/api/jumbotron`, null, problem => {
+        if (problem === null) {
+            route(prependBaseUrl(`/error?message=${encodeURIComponent(`Il problema jumbotron non esiste`)}`))
+        }
+    })
+
+    if (!problem) {
+        return <></>
+    }
+
+    const [solutions] = useListResource<SolutionModel>(`/api/solutions?problem=${problem.id}`)
+
+    return (
+        <>
+            <main class="page-jumbotron">
+                <div class="subtitle">
+                    <a href="/">PHC Problemi</a>
+                </div>
+                <>{problem && <Problem {...problem} />}</>
+                <div class="centered">
+                    Per ora ci sono {solutions.length} soluzion{'ie'[solutions.length === 1 ? 1 : 0]}
+                </div>
+            </main>
+        </>
+    )
+}

client/styles/main.scss

@@ -467,6 +467,15 @@ main.page-scores {
     }
 }
 
+main.page-jumbotron {
+    width: 100%;
+    height: 100%;
+
+    justify-content: center;
+
+    zoom: 1.5;
+}
+
 //
 // Components
 //

docs/Makefile

@@ -0,0 +1,10 @@
+
+.PHONY: all
+all: setup out/package-json.svg
+
+.PHONY: setup
+setup: 
+	mkdir -p out
+
+out/package-json.svg: package-json.gv
+	dot -T svg -o out/package-json.svg package-json.gv

docs/out/package-json.svg

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docs/package-json.gv

@@ -0,0 +1,12 @@
+digraph {
+    rankdir=LR;
+    node [shape=box, style=rounded];
+
+    "build" -> { "build:client", "build:ssr", "build:server" }
+    "build:client" -> "vite build --outDir dist/entry-client"
+    "build:ssr" -> "vite build --ssr client/entry-server.tsx --outDir dist/entry-server"
+    "build:server" -> "esbuild server.ts --bundle --platform=node --format=esm --external:./node_modules/* --outdir=dist/server"
+    "dev" -> { "build:server", "serve:dev" }
+    "serve:dev" -> "MODE=development node dist/server/server.js"
+    "serve" -> "node dist/server/server.js"
+}

server/db/database.ts

@@ -65,6 +65,9 @@ export function createDatabaseWrapper(db: DatabaseInternal): DatabaseConnection
         getProblem(id: string): Promise<Problem | null> {
             return getProblem(db, id)
         },
+        getJumbotronProblem(): Promise<Problem | null> {
+            return getJumbotronProblem(db)
+        },
     }
 }
 
@@ -145,6 +148,18 @@ export const getProblem = (db: DatabaseInternal, id: string): Promise<Problem |
         return problem && !problem.deleted ? problem : null
     })
 
+export const getJumbotronProblem = (db: DatabaseInternal): Promise<Problem | null> =>
+    withDatabase(db, state => {
+        const mostRecentProblems = Object.values(state.problems)
+            .filter(p => !p.deleted)
+            .sort((p1, p2) => new Date(p2.createdAt).getTime() - new Date(p1.createdAt).getTime())
+            .slice(0, 3)
+
+        if (mostRecentProblems.length === 0) return null
+
+        return mostRecentProblems[Math.floor(Math.random() * mostRecentProblems.length)]
+    })
+
 export const getProblems = (db: DatabaseInternal): Promise<Problem[]> =>
     withDatabase(db, state => {
         return Object.values(state.problems).filter(p => !p.deleted)

server/db/example-data.ts

@@ -1,5 +1,5 @@
 import { UserId } from '../../shared/model'
-import { Database } from './database'
+import { Database } from '../../shared/database'
 
 export const initialDatabaseValue: Database = {
     users: {},

server/routes.ts

@@ -14,6 +14,7 @@ import {
     createSolution,
     deleteProblem,
     deleteSolution,
+    getJumbotronProblem,
     getProblem,
     getProblems,
     getSolution,
@@ -140,6 +141,11 @@ export async function createApiRouter(): Promise<[Router, DatabaseConnection]> {
         res.json(users)
     })
 
+    r.get('/api/jumbotron', async (req, res) => {
+        const problem = await getJumbotronProblem(db)
+        res.json(problem)
+    })
+
     r.get('/api/problems', async (req, res) => {
         type ProblemWithSolutionsCount = ProblemModel & { solutionsCount?: number }
 

shared/database.ts

@@ -2,6 +2,7 @@ import { Problem, Solution, User } from './model'
 
 export type DatabaseConnection = {
     getProblem(id: string): Promise<Problem | null>
+    getJumbotronProblem(): Promise<Problem | null>
 }
 
 export type Database = {