reworks, docs and new api

db.psql

@@ -10,7 +10,7 @@ CREATE TABLE IF NOT EXISTS Users (
 
 CREATE TABLE IF NOT EXISTS Chats (
     ID SERIAL,
-    name VARCHAR(32), --chat name
+    name VARCHAR(128), --chat name
     admins INT[], -- to table Users, column ID.
     messages INT[] -- ref to table Messages, column ID.
 );

docker-compose.yml

@@ -3,8 +3,10 @@ version: "3.3"
 services:
   chat:
     build: .
+    restart: always
     ports:
-      - 8080:8080
+      - 8080:8080 # HTTP
+      - 8081:8081 # Websocket
     networks:
       ne_nuzhen:
         ipv4_address: 10.5.0.5
@@ -18,7 +20,8 @@ services:
     networks:
       ne_nuzhen:
         ipv4_address: 10.5.0.6
-
+    volumes:
+        - ./postgres:/var/lib/postgresql/data
     environment:
       POSTGRES_USER: smk # The PostgreSQL user (useful to connect to the database)
       POSTGRES_PASSWORD: CHANGEME # The PostgreSQL password (useful to connect to the database)

package-lock.json

@@ -15,7 +15,8 @@
         "express": "^4.19.2",
         "express-session": "^1.18.0",
         "nodemon": "^3.1.3",
-        "pg": "^8.12.0"
+        "pg": "^8.12.0",
+        "ws": "^8.17.0"
       }
     },
     "node_modules/@mapbox/node-pre-gyp": {
@@ -201,6 +202,20 @@
         "node": ">=8"
       }
     },
+    "node_modules/bufferutil": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/bufferutil/-/bufferutil-4.0.8.tgz",
+      "integrity": "sha512-4T53u4PdgsXqKaIctwF8ifXlRTTmEPJ8iEPWFdGZvcf7sbwYo6FKFEX9eNNAnzFZ7EzJAQ3CJeOtCRA4rDp7Pw==",
+      "hasInstallScript": true,
+      "optional": true,
+      "peer": true,
+      "dependencies": {
+        "node-gyp-build": "^4.3.0"
+      },
+      "engines": {
+        "node": ">=6.14.2"
+      }
+    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1063,6 +1078,18 @@
         }
       }
     },
+    "node_modules/node-gyp-build": {
+      "version": "4.8.1",
+      "resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.8.1.tgz",
+      "integrity": "sha512-OSs33Z9yWr148JZcbZd5WiAXhh/n9z8TxQcdMhIOlpN9AhWpLfvVFO73+m77bBABQMaY9XSvIa+qk0jlI7Gcaw==",
+      "optional": true,
+      "peer": true,
+      "bin": {
+        "node-gyp-build": "bin.js",
+        "node-gyp-build-optional": "optional.js",
+        "node-gyp-build-test": "build-test.js"
+      }
+    },
     "node_modules/nodemon": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.3.tgz",
@@ -1723,6 +1750,20 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/utf-8-validate": {
+      "version": "5.0.10",
+      "resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-5.0.10.tgz",
+      "integrity": "sha512-Z6czzLq4u8fPOyx7TU6X3dvUZVvoJmxSQ+IcrlmagKhilxlhZgxPK6C5Jqbkw1IDUmFTM+cz9QDnnLTwDz/2gQ==",
+      "hasInstallScript": true,
+      "optional": true,
+      "peer": true,
+      "dependencies": {
+        "node-gyp-build": "^4.3.0"
+      },
+      "engines": {
+        "node": ">=6.14.2"
+      }
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -1771,6 +1812,26 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
     },
+    "node_modules/ws": {
+      "version": "8.17.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.17.0.tgz",
+      "integrity": "sha512-uJq6108EgZMAl20KagGkzCKfMEjxmKvZHG7Tlq0Z6nOky7YF7aq4mOx6xK8TJ/i1LeK4Qus7INktacctDgY8Ow==",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/xtend": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",

package.json

@@ -20,6 +20,7 @@
     "express": "^4.19.2",
     "express-session": "^1.18.0",
     "nodemon": "^3.1.3",
-    "pg": "^8.12.0"
+    "pg": "^8.12.0",
+    "ws": "^8.17.0"
   }
 }

src/index.js

@@ -5,9 +5,11 @@ const fs = require('fs');
 const bcrypt = require('bcrypt');
 const cors = require("cors");
 const cookieSession = require("cookie-session");
-
+const WebSocket = require('ws');
 const app = express();
 
+const PORT = 8080;
+
 const { Client } = pg;
 const client = new Client({
     user: "smk",
@@ -15,34 +17,84 @@ const client = new Client({
     host: "10.5.0.6", //defined in docker-compose.yml.
     port: 5432,
     database: "chat"
+});
+// /api/getChats
+// /api/getChat/?id
+// websocket
+
+const requireToBeLoggedIn = (req, res, next) => {
+    if (sessions[req.session.token] == undefined) return res.redirect('/login');
+    next();
+};
+const requireToBeNotLoggedIn = (req, res, next) => {
+    if (req.session.token != undefined) return res.redirect('/');
+    next();
+};
+
+const ws = new WebSocket.Server({
+    port: PORT + 1
 })
+console.log("[LOG] Socket has been started");
+
+let clients = []
+
+ws.on('connection', (client) => {
+    clients.push(client)
+
+    client.on('message', async (msg) => {
+        try {
+            let jsonMsg = JSON.parse(msg)
+            switch (jsonMsg.action) {
+                case "sync": {
+                    break;
+                    let chats;
+                    let query_res = await client.query(`SELECT chats FROM Users WHERE `);
+                }
+
+                case "message":
+                    break;
+
+                default:
+                    console.log(`Package cannot be understood: ${jsonMsg}`)
+            }
+            console.log(jsonMsg)
+            client.send(JSON.stringify({
+                "test": "a"
+            }));
+        } catch (e) {
+            console.log(`[ERROR] in receiving message by websocket: ${e}`)
+        }
+    });
+
+    client.on('close', () => {
+        clients = clients.filter(c => c !== client)
+    })
+})
+
 app.use(cors());
 app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
 app.use(require('express-session')({
 
     name: 'smk_chat',
-    secret: 'PLEASE!!GENERATE!!A!!STRONG!!ONE',
+    secret: 'PLEASE!!GENERATE!!A!!STRONG!!ONE!!',
     resave: false,
     saveUninitialized: false
 
 }));
+app.use('/js', express.static(__dirname + "/js"));
 
-let sessions = {}
+let sessions = {};
 
-app.get('/', (req, res) => {
+app.get('/', requireToBeLoggedIn, (req, res) => {
-    if (sessions[req.session.token] == undefined) return res.redirect('/login');
     res.sendFile('views/index.html', { root: __dirname });
 });
 
-app.get('/registration', (req, res) => {
+app.get('/registration', requireToBeNotLoggedIn, (req, res) => {
-    if (req.session.token != undefined) return res.redirect('/');
-
     res.sendFile('views/registration.html', { root: __dirname });
 });
 
-app.get('/login', (req, res) => {
+app.get('/login', requireToBeNotLoggedIn, (req, res) => {
-    if (sessions[req.session.token] != undefined) return res.redirect('/');
     res.sendFile('views/login.html', { root: __dirname });
 });
 
@@ -50,20 +102,89 @@ const generateRandomString = () => {
     return Math.floor(Math.random() * Date.now()).toString(36);
 };
 
-
 const getIdByCredentials = async (lastname, firstname, middlename) => {
     let query_res = await client.query("SELECT ID FROM Users WHERE lastname = $1::text AND firstname = $2::text AND middlename = $3::text;", [lastname, firstname, middlename]);
     if (query_res.rowCount == 0) return -1; // no such user
     if (query_res.rowCount == 1) return query_res.rows[0].id;
 }
 
-app.get('/api/logout', (req, res) => {
-    if (req.session.token == undefined) return res.redirect('/login');
-    sessions[req.session.token] = undefined;
-    res.redirect('/login');
-})
 
-app.post('/api/register', async (req, res) => {
+
+//IN: lastname, firstname, middlename
+//OUT: UserID
+//Returns an ID of the user, whose lastname, firstname and middlename were passed.
+//Returns -1 if user does not exist.
+//Requires client to be logged in.
+app.get('/api/getIdByCredentials', requireToBeLoggedIn, async (req, res) => {
+    const { lastname, firstname, middlename } = req.body;
+
+    return res.send(await getIdByCredentials(lastname, firstname, middlename)).end();
+});
+
+//IN: UserID
+//OUT: Array of chat IDs
+//Returs ids of chats which user with passed ID is member in.
+//Return empty string if user has no membership in any chat.
+app.get('/api/getChats', requireToBeLoggedIn, async (req, res) => {
+
+    const userId = sessions[req.session.token]
+    console.log(`userId: ${userId}`);
+
+    let chats = (await client.query("SELECT chats FROM Users WHERE ID = $1", [userId])).rows[0].chats
+    return res.send(chats).status(200).end();
+});
+
+//IN: UserId, array of UserIDs that are to be invited.
+//OUT: "Ok" if succsessful, "User with id ${MEMBERID} does not exist."
+//Requires to be logged in
+app.post('/api/createChat', requireToBeLoggedIn, async (req, res) => {
+    const userId = sessions[req.session.token]
+    let { toInviteIds } = req.body;
+
+    toInviteIds = toInviteIds.split(" ");
+
+    toInviteIds.forEach(async (id, index, toInviteIds) => {
+        if ((await client.query("SELECT ID FROM Users WHERE ID = $1", [id])).rowCount == 0) {
+            return res.send(`User with id ${id} does not exist.`)
+        }
+    });
+
+    let chatName
+    if (toInviteIds.length == 1) {
+        let invitedFullname = (await client.query("SELECT lastname, firstname, middlename FROM Users WHERE ID = $1;", [toInviteIds[0]])).rows[0]
+        let invitorFullname = (await client.query("SELECT lastname, firstname, middlename FROM Users WHERE ID = $1;", [userId])).rows[0]
+        chatName = invitedFullname.lastname + " " + invitedFullname.firstname + " " + invitedFullname.middlename + " и " + invitorFullname.lastname + " " + invitorFullname.firstname + " " + invitorFullname.middlename 
+        console.log(`Chatname: ${chatName}`)
+    } else {
+        chatName = "Новая группа"
+    }
+
+    let chatId = (await client.query("INSERT INTO Chats (name) VALUES ($1) RETURNING ID;", [chatName])).rows[0].id
+
+    await client.query("UPDATE Chats SET admins = ARRAY_APPEND(admins, $1) WHERE ID = $2", [userId, chatId]);
+
+    toInviteIds.forEach(async (id, index, toInviteIds) => {
+        await client.query("UPDATE Users SET chats = ARRAY_APPEND(chats, $1) WHERE ID = $2;", [chatId, id]);
+    });
+    return res.send("Ok")
+});
+
+//IN: none.
+//OUT: redirect to /login.
+//Removes client's session, thus unlogging a user.
+//Requires to be logged in.
+app.get('/api/logout', requireToBeLoggedIn, (req, res) => {
+    sessions[req.session.token] = undefined;
+    req.session.token = undefined;
+    res.redirect('/login');
+});
+
+//IN: lastname, firstname, middlename, password.
+//OUT: redirect to /.
+//Checks if user exist. If so, returns 400 with response "Such user exists.".
+//Otherwise, registers a user with given data.
+//Requires to be not logged in.
+app.post('/api/register', requireToBeNotLoggedIn, async (req, res) => {
     try {
         const { lastname, firstname, middlename, password } = req.body;
 
@@ -82,12 +203,17 @@ app.post('/api/register', async (req, res) => {
         sessions[req.session.token] = id;
         res.redirect('/');
     } catch (err) {
-        console.log("[ERROR] in /api/register: " + err)
+        console.log(`[ERROR] in /api/register: ${err}`)
         res.status(500).send();
     }
 });
 
-app.post('/api/login', async (req, res) => {
+//IN: lastname, firstname, middlename, password.
+//OUT: redirect to /.
+//Checks if user exists. If not, returns 400 with response "No such user.".
+//Otherwise, compares passwords using bcrypt
+//If passwords match, creating session and redirects to /
+app.post('/api/login', requireToBeNotLoggedIn, async (req, res) => {
     try {
         const { lastname, firstname, middlename, password } = req.body;
 
@@ -106,7 +232,7 @@ app.post('/api/login', async (req, res) => {
             return res.status(400).send("Wrong password").end();
         }
     } catch (err) {
-        console.log("[ERROR] in /api/login: " + err)
+        console.log(`[ERROR] in /api/login: ${err}`)
         res.status(500).send();
     }
 
@@ -118,14 +244,14 @@ const initDb = async () => {
     let db_schema = fs.readFileSync('./db.psql').toString();
     try {
         const res = await client.query(db_schema);
-        console.log("Database initialized.")
+        console.log("[LOG] Database initialized.")
     } catch (err) {
-        console.log("Cannot initialize database. Error: " + err);
+        console.log(`[ERROR] Cannot initialize database: ${err}`);
     }
 }
 
 initDb().then(() => {
-    app.listen(8080, "0.0.0.0", () => {
+    app.listen(PORT, "0.0.0.0", () => {
-        console.log("Ready to use.");
+        console.log("[LOG] Ready to use.");
     });
 });

src/js/frontend.js

@@ -0,0 +1,23 @@
+let socket
+
+const pingServer = (socket) => {
+    socket.send("")
+}
+
+window.addEventListener('load', function () {
+    let connectionString = location.protocol == "https:" ? `wss://${window.location.hostname}:${Number(window.location.port) + 1}` : `ws://${window.location.hostname}:${Number(window.location.port) + 1}`
+    socket = new WebSocket(connectionString)
+
+    socket.addEventListener('open', (e) => {
+        socket.send(JSON.stringify(
+            {
+                "action": "sync"
+            }
+        ));
+    })
+
+    fetch("/api/getChats", {
+        method: "GET"
+    }).then(response => response.text())
+      .then((response => console.log(response)))
+})

src/views/index.html

@@ -5,6 +5,13 @@
         <title>index</title>
     </head>
     <body>
+        <form action="/api/createChat" method="POST">
+            <label for="toInviteIds">ID пользователей для приглашения через пробел</label><br/>
+            <input type="text" id="toInviteIds" name="toInviteIds"><br/>
+
+            <input type="submit" value="Создать чат">
+        </form>
         <a href="/api/logout">Выйти</a>  
     </body>
+    <script src="/js/frontend.js"></script>
 </html>

src/views/login.html

@@ -17,7 +17,7 @@
                 <input type="text" id="password" name="password"><br/>
                 <input type="submit" value="Войти">
             </form>
-            Нет аккаунта? <a href="/register">Зарегистрируйте.</a>
+            Нет аккаунта? <a href="/registration">Зарегистрируйте.</a>
         </body>
     </body>
 </html>

src/views/registration.html

@@ -8,14 +8,19 @@
         <form onSubmit="return checkPassword(this)" method="post" action="/api/register">
             <label for="lastname">Фамилия:</label><br/>
             <input type="text" id="lastname" name="lastname"><br/>
+
             <label for="firstname">Имя:</label><br/>
             <input type="text" id="firstname" name="firstname"><br/>
+
             <label for="middlename">Отчество:</label><br/>
             <input type="text" id="middlename" name="middlename"><br/>
+
             <label for="password">Пароль:</label><br/>
             <input type="text" id="password" name="password"><br/>
+
             <label for="confirmPassword">Повтор пароля:</label><br/>
             <input type="text" id="confirmPassword" name="confirmPassword"><br/>
+            
             <input type="submit" value="Зарегистрироваться">
         </form>
         Уже есть аккаунт? <a href="/login">Войдите.</a>