Created the app handler

server/handler/app.js

@@ -0,0 +1,80 @@
+const {Client} = require("ssh2");
+const fs = require("fs");
+
+const services = fs.readdirSync(__dirname + "/apps").map((item) => item.replace(".js", ""));
+module.exports = (io, socket) => {
+    let session = new Client();
+    let connected = false;
+    let queue = [];
+
+    socket.on("disconnect", () => session.end());
+
+    socket.on("login", (msg) => {
+        if (session._sock || connected) return;
+
+        session.on("ready", () => {
+            connected = true;
+            socket.emit("login", {status: "success"});
+        }).connect({host: msg.host, port: msg.port || 22, username: msg.username || "root",
+            password: msg.password, privateKey: msg.privateKey
+        }).on("error", (err) => {
+            socket.emit("login", {status: "failed", message: err.message});
+        });
+    });
+
+    const execQueue = () => {
+        if (queue.length === 0) {
+            socket.emit("install", {status: "finished"});
+            return;
+        }
+
+        const {command, step} = queue[0];
+
+        session.exec(command, (err, stream) => {
+            if (err) return socket.emit("install", {status: "failed", message: err.message, step});
+            stream.on("close", (code) => {
+                if (code !== 0) {
+                    queue = [];
+                    return socket.emit("install", {status: "failed", message: "Error while installing", step});
+                }
+                socket.emit("install", {status: "success", step});
+                queue.shift();
+                execQueue();
+            }).on("data", () => {});
+        });
+    }
+
+    socket.on("install", (msg) => {
+        if (!connected) return socket.emit("install", {status: "failed", message: "Not connected"});
+        if (queue.length > 0) return socket.emit("install", {status: "failed", message: "Another installation is in progress"});
+
+        const serviceName = msg.name.toLowerCase();
+
+        if (!services.includes(serviceName)) return socket.emit("install", {status: "failed", message: "Service not found"});
+
+        const app = require(`./apps/${serviceName}`);
+
+        let infoData = [];
+
+        app.steps.map((mappedItem, index) => {
+            let item = {...mappedItem};
+            Object.keys(app.variables).map((key) => {
+                item.command = item.command.replace(new RegExp(`{${key}}`, "g"), msg.data[key] || app.variables[key]);
+            });
+
+            if (item.condition) {
+                const [key, value] = item.condition.split("=");
+                if (msg?.data[key] !== value) return;
+            }
+
+            queue.push({...item, step: index+1});
+
+            if (item.description)
+                infoData.push({description: item.description, step: index+1});
+        });
+
+        socket.emit("install", {status: "info", data: infoData});
+
+        execQueue();
+    });
+}