I actually made a lot of stuff without committing

.env

@@ -1,7 +0,0 @@
-# Environment variables declared in this file are automatically made available to Prisma.
-# See the documentation for more detail: https://pris.ly/d/prisma-schema#accessing-environment-variables-from-the-schema
-
-# Prisma supports the native connection string format for PostgreSQL, MySQL, SQLite, SQL Server, MongoDB and CockroachDB (Preview).
-# See the documentation for all the connection string options: https://pris.ly/d/connection-strings
-
-DATABASE_URL="postgresql://steffo@localhost/festa?host=/var/run/postgresql"

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+    "files.exclude": {
+        // Version control
+        "**/.git": true,
+        "**/.svn": true,
+        "**/.hg": true,
+        "**/CVS": true,
+        "**/.DS_Store": true,
+        "**/Thumbs.db": true,
+        // Node
+        "node_modules": true,
+        ".next": true,
+        "yarn.lock": true,
+    }
+}

package.json

@@ -13,7 +13,8 @@
     "next": "12.1.6",
     "prisma": "^3.14.0",
     "react": "18.1.0",
-    "react-dom": "18.1.0"
+    "react-dom": "18.1.0",
+    "react-telegram-login": "^1.1.2"
   },
   "devDependencies": {
     "@types/node": "17.0.35",

pages/index.tsx

@@ -3,7 +3,7 @@ import type { NextPage } from 'next'
 const Page: NextPage = () => {
     return (
         <div>
-            sus
+            wrong page bro
         </div>
     )
 }

pages/party/[slug].tsx

@@ -0,0 +1,47 @@
+import type { NextPage, NextPageContext } from 'next'
+import { useRouter } from 'next/router'
+import TelegramLoginButton from 'react-telegram-login'
+import * as Telegram from "../../utils/telegram"
+
+interface PageProps {
+    userData: Telegram.LoginData | null
+}
+
+export async function getServerSideProps(context: NextPageContext): Promise<{props: PageProps}> {
+    const props: PageProps = {
+        userData: null,
+    }
+
+    const token = process.env.BOT_TOKEN
+    if(token === undefined) {
+        throw new Error("BOT_TOKEN is not set on the server-side, cannot perform login validation.")
+    }
+
+    if(context.query.hash !== undefined) {
+        const loginResponse = new Telegram.LoginResponse(context.query)
+        if(loginResponse.isRecent() && loginResponse.isValid(process.env.BOT_TOKEN)) {
+            props.userData = loginResponse.serialize()
+        }
+    }
+
+    return {props}
+}
+
+const Page: NextPage<PageProps> = ({userData}) => {
+    const router = useRouter()
+    
+    return (
+        <div>
+            {userData ? 
+                JSON.stringify(userData)
+            :
+                <TelegramLoginButton
+                    dataAuthUrl={router.asPath}
+                    botName="festaappbot"
+                />
+            }
+        </div>
+    )
+}
+
+export default Page

prisma/schema.prisma

@@ -32,6 +32,17 @@ model Event {
     vehicles     Vehicle[]
 }
 
+/// A user is a person who is using the Festa website, who logged in via Telegram.
+model User {
+    id           BigInt   @id
+    firstName    String
+    lastName     String?
+    username     String?
+    photoUrl     String?
+    lastAuthDate DateTime
+    hash         String
+}
+
 /// A partecipant is a person who may or may not partecipate to the event.
 model Partecipant {
     id          Int                 @id @default(autoincrement())

styles/Home.module.css

@@ -1,116 +0,0 @@
-.container {
-  padding: 0 2rem;
-}
-
-.main {
-  min-height: 100vh;
-  padding: 4rem 0;
-  flex: 1;
-  display: flex;
-  flex-direction: column;
-  justify-content: center;
-  align-items: center;
-}
-
-.footer {
-  display: flex;
-  flex: 1;
-  padding: 2rem 0;
-  border-top: 1px solid #eaeaea;
-  justify-content: center;
-  align-items: center;
-}
-
-.footer a {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  flex-grow: 1;
-}
-
-.title a {
-  color: #0070f3;
-  text-decoration: none;
-}
-
-.title a:hover,
-.title a:focus,
-.title a:active {
-  text-decoration: underline;
-}
-
-.title {
-  margin: 0;
-  line-height: 1.15;
-  font-size: 4rem;
-}
-
-.title,
-.description {
-  text-align: center;
-}
-
-.description {
-  margin: 4rem 0;
-  line-height: 1.5;
-  font-size: 1.5rem;
-}
-
-.code {
-  background: #fafafa;
-  border-radius: 5px;
-  padding: 0.75rem;
-  font-size: 1.1rem;
-  font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
-    Bitstream Vera Sans Mono, Courier New, monospace;
-}
-
-.grid {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  flex-wrap: wrap;
-  max-width: 800px;
-}
-
-.card {
-  margin: 1rem;
-  padding: 1.5rem;
-  text-align: left;
-  color: inherit;
-  text-decoration: none;
-  border: 1px solid #eaeaea;
-  border-radius: 10px;
-  transition: color 0.15s ease, border-color 0.15s ease;
-  max-width: 300px;
-}
-
-.card:hover,
-.card:focus,
-.card:active {
-  color: #0070f3;
-  border-color: #0070f3;
-}
-
-.card h2 {
-  margin: 0 0 1rem 0;
-  font-size: 1.5rem;
-}
-
-.card p {
-  margin: 0;
-  font-size: 1.25rem;
-  line-height: 1.5;
-}
-
-.logo {
-  height: 1em;
-  margin-left: 0.5rem;
-}
-
-@media (max-width: 600px) {
-  .grid {
-    width: 100%;
-    flex-direction: column;
-  }
-}

styles/globals.css

@@ -1,16 +1,22 @@
-html,
-body {
-  padding: 0;
-  margin: 0;
-  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
-    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
-}
-
-a {
-  color: inherit;
-  text-decoration: none;
+html {
+    padding: 0;
+    margin: 0;
 }
 
 * {
-  box-sizing: border-box;
+    box-sizing: border-box;
 }
+
+@media (prefers-color-scheme: light) {
+    body {
+        background-color: white;
+        color: black;
+    }
+}
+
+@media (prefers-color-scheme: dark) {
+    body {
+        background-color: black;
+        color: white;
+    }
+}

tsconfig.json

@@ -13,7 +13,7 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "jsx": "preserve",
-    "incremental": true
+    "incremental": true,
   },
   "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
   "exclude": ["node_modules"]

utils/telegram.ts

@@ -0,0 +1,150 @@
+import nodecrypto from "crypto"
+
+/**
+ * The validated user data serialized by the server.
+ */
+export interface LoginData {
+    id: number
+    first_name: string
+    last_name: string | null
+    username: string | null
+    photo_url: string | null
+    lang: string | null
+}
+
+
+/**
+ * The response sent by Telegram after a login.
+ */
+export class LoginResponse {
+    id: number
+    first_name: string
+    last_name?: string
+    username?: string
+    photo_url?: string
+    auth_date: number
+    hash: string
+    lang?: string
+
+    /**
+     * Construct a new {@link LoginResponse} from a query string object as returned by Next.js.
+     * 
+     * @param queryObj The query string object, from `context.query`.
+     */
+    constructor(queryObj: {[_: string]: string | string[]}) {
+        if(typeof queryObj.id === "object") {
+            throw new Error("Multiple `id` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.first_name === "object") {
+            throw new Error("Multiple `first_name` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.last_name === "object") {
+            throw new Error("Multiple `last_name` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.username === "object") {
+            throw new Error("Multiple `username` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.photo_url === "object") {
+            throw new Error("Multiple `photo_url` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.auth_date === "object") {
+            throw new Error("Multiple `auth_date` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.hash === "object") {
+            throw new Error("Multiple `hash` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+        if(typeof queryObj.lang === "object") {
+            throw new Error("Multiple `hash` parameters specified in the query string, cannot construct LoginResponse.")
+        }
+
+        this.id = parseInt(queryObj.id)
+        this.first_name = queryObj.first_name
+        this.last_name = queryObj.last_name
+        this.username = queryObj.username
+        this.photo_url = queryObj.photo_url
+        this.auth_date = parseInt(queryObj.auth_date)
+        this.hash = queryObj.hash
+        this.lang = queryObj.lang
+    }
+
+    /**
+     * Serialize this response into a {@link LoginData} object, which can be passed to the client by Next.js.
+     * 
+     * @returns The {@link LoginData} object.
+     */
+    serialize(): LoginData {
+        return {
+            id: this.id ?? null,
+            first_name: this.first_name ?? null,
+            last_name: this.last_name ?? null,
+            username: this.username ?? null,
+            photo_url: this.photo_url ?? null,
+            lang: this.lang ?? null,
+        }
+    }
+
+    /**
+     * Stringify a {@link LoginResponse} in [the format required to verify a Telegram Login](https://core.telegram.org/widgets/login#checking-authorization).
+     * 
+     * @param data The data to encode.
+     * @returns The stringified data.
+     */
+    stringify(): string {
+        const string = Object.entries(this)
+            .filter(([key, _]) => key !== "hash")
+            .filter(([_, value]) => value !== undefined)
+            .map(([key, value]) => `${key}=${value}`)
+            .sort()
+            .join("\n")
+        return string
+    }
+
+    /**
+     * Check if the `auth_date` of the response is recent: it must be in the past, but within `maxSeconds` from the current date.
+     * 
+     * @param maxSeconds The maximum number of milliseconds that may pass after authentication for the response to be considered valid; defaults to `300000`, 5 minutes.
+     * @returns `true` if the response can be considered recent, `false` otherwise.
+     */
+    isRecent(maxSeconds: number = 300000): boolean {
+        const diff = new Date().getTime() - new Date(this.auth_date * 1000).getTime()
+        return 0 < diff && diff <= maxSeconds
+    }
+
+
+    /**
+     * Calculate the "`hash`" of a Telegram Login using [this procedure](https://core.telegram.org/widgets/login#checking-authorization).
+     * 
+     * @param token The bot token used to validate the signature.
+     * @returns The calculated value of the `hash` {@link LoginResponse} parameter.
+     */
+    hmac(token: string): string {
+        const key = hashToken(token)
+        const hmac = nodecrypto.createHmac("sha256", key)
+        hmac.update(this.stringify())
+        return hmac.digest("hex")
+    }
+
+    /**
+     * Validate a Telegram Login using [this procedure](https://core.telegram.org/widgets/login#checking-authorization).
+     * 
+     * @param token The bot token used to validate the signature.
+     * @returns `true` if the validation is successful, `false` otherwise.
+     */
+    isValid(token: string): boolean {
+        const client = this.hmac(token)
+        const server = this.hash
+        return client === server
+    }
+}
+
+/**
+ * Hash a Telegram bot token using SHA-256.
+ * 
+ * @param token The bot token to hash.
+ * @returns The hex digest of the hash.
+ */
+function hashToken(token: string): Buffer {
+    const hash = nodecrypto.createHash("sha256")
+    hash.update(token)
+    return hash.digest()
+}

yarn.lock

@@ -1406,7 +1406,7 @@ prisma@^3.14.0:
   dependencies:
     "@prisma/engines" "3.14.0-36.2b0c12756921c891fec4f68d9444e18c7d5d4a6a"
 
-prop-types@^15.8.1:
+prop-types@^15.6.2, prop-types@^15.8.1:
   version "15.8.1"
   resolved "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz#67d87bf1a694f48435cf332c24af10214a3140b5"
   integrity sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==
@@ -1438,6 +1438,13 @@ react-is@^16.13.1:
   resolved "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz#789729a4dc36de2999dc156dd6c1d9c18cea56a4"
   integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==
 
+react-telegram-login@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.npmjs.org/react-telegram-login/-/react-telegram-login-1.1.2.tgz#28b9bdd68bb2710afca19354ac1f9428092836f0"
+  integrity sha512-pDP+bvfaklWgnK5O6yvZnIwgky0nnYUU6Zhk0EjdMSkPsLQoOzZRsXIoZnbxyBXhi7346bsxMH+EwwJPTxClDw==
+  dependencies:
+    react "^16.13.1"
+
 react@18.1.0:
   version "18.1.0"
   resolved "https://registry.npmjs.org/react/-/react-18.1.0.tgz#6f8620382decb17fdc5cc223a115e2adbf104890"
@@ -1445,6 +1452,15 @@ react@18.1.0:
   dependencies:
     loose-envify "^1.1.0"
 
+react@^16.13.1:
+  version "16.14.0"
+  resolved "https://registry.npmjs.org/react/-/react-16.14.0.tgz#94d776ddd0aaa37da3eda8fc5b6b18a4c9a3114d"
+  integrity sha512-0X2CImDkJGApiAlcf0ODKIneSwBPhqJawOa5wCtKbu7ZECrmS26NvtSILynQ66cgkT/RJ4LidJOc3bUESwmU8g==
+  dependencies:
+    loose-envify "^1.1.0"
+    object-assign "^4.1.1"
+    prop-types "^15.6.2"
+
 regenerator-runtime@^0.13.4:
   version "0.13.9"
   resolved "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"