Adds an endpoint for rebuilding the app, so that it can be triggered from the UI

Author: Lissy93

server.js

@@ -13,10 +13,11 @@ const dns = require('dns');
 const os = require('os');
 const bodyParser = require('body-parser');
 
-/* Include helper functions */
+/* Include helper functions and route handlers */
 const pingUrl = require('./services/ping'); // Used by the status check feature, to ping services
 const saveConfig = require('./services/save-config'); // Saves users new conf.yml to file-system
 const printMessage = require('./services/print-message'); // Function to print welcome msg on start
+const rebuild = require('./services/rebuild-app'); // A script to programmatically trigger a build
 require('./src/utils/ConfigValidator'); // Include and kicks off the config file validation script
 
 /* Checks if app is running within a container, from env var */
@@ -39,6 +40,7 @@ const printWelcomeMessage = () => {
   });
 };
 
+/* Just console.warns an error */
 const printWarning = (msg, error) => {
   console.warn(`\x1b[103m\x1b[34m${msg}\x1b[0m\n`, error || ''); // eslint-disable-line no-console
 };
@@ -64,7 +66,7 @@ try {
       }
     })
     // POST Endpoint used to save config, by writing conf.yml to disk
-    .use('/api/save', method('POST', (req, res) => {
+    .use('/config-manager/save', method('POST', (req, res) => {
       try {
         saveConfig(req.body, (results) => {
           res.end(results);
@@ -73,10 +75,18 @@ try {
         res.end(JSON.stringify({ success: false, message: e }));
       }
     }))
+    // GET endpoint to trigger a build, and respond with success status and output
+    .use('/config-manager/rebuild', (req, res) => {
+      rebuild().then((response) => {
+        res.end(JSON.stringify(response));
+      }).catch((response) => {
+        res.end(JSON.stringify(response));
+      });
+    })
     // Finally, initialize the server then print welcome message
     .listen(port, () => {
       try { printWelcomeMessage(); } catch (e) { printWarning('Dashy is Starting...'); }
     });
 } catch (error) {
-  printWarning('Sorry, an error occurred ', error);
+  printWarning('Sorry, a critical error occurred ', error);
 }

services/rebuild-app.js

@@ -0,0 +1,31 @@
+/**
+ * This script programmatically triggers a production build
+ * and responds with the status, message and full output
+ */
+const { exec } = require('child_process');
+
+module.exports = () => new Promise((resolve, reject) => {
+  const buildProcess = exec('npm run build');
+
+  let output = '';
+
+  buildProcess.stdout.on('data', (data) => {
+    process.stdout.write(data);
+    output += data;
+  });
+
+  buildProcess.on('error', (error) => {
+    reject(Error({
+      success: false,
+      error,
+      output,
+    }));
+  });
+
+  buildProcess.on('exit', (response) => {
+    const success = response === 0;
+    const message = `Build process exited with ${response}: `
+      + `${success ? 'Success' : 'Possible Error'}`;
+    resolve({ success, message, output });
+  });
+});