Adding detection for files to control the script

main.js

@@ -2,6 +2,8 @@
 var gpio = require('rpi-gpio');
 // Module for importing environment variables
 var dotenv = require('dotenv').config();
+// Module for working with files
+var fs = require('fs');
 
 // Set up GPIO 4 (pysical pin 7) as output, then call cycleAuger()
 gpio.setup(7, gpio.DIR_OUT, cycleAuger);
@@ -44,7 +46,34 @@ function sleep(ms) {
 // Main function, turns the auger on, sleeps for the time given in environment variables, then turns the auger off, sleeps, repeats.
 async function cycleAuger(err) {
     if (err) throw err;
-    // TODO: Detect file 'pause', 'reload', 'quit'
+    // Check for pause file existing, then sleep for preset time, then run the function again.
+    if (fs.existsSync('./pause')) {
+        console.log('Paused...');
+        await sleep(process.env.PAUSETIME);
+        cycleAuger();
+    }
+
+    // Check for reload file existing, then reload environment variables, then delete the file.
+    if (fs.existsSync('./reload')) {
+        dotenv.config({ override: true })
+        fs.unlink('./reload', (err) => {
+            if (err) throw err;
+            console.log('Deleted reload file.');
+        });
+        console.log('Reloaded environment variables.');
+    }
+
+    // Check for quit file existing, then delete it, then quit the program
+    if (fs.existsSync('./quit')) {
+        fs.unlink('./quit', (err) => {
+            if (err) throw err;
+            console.log('Removed quit file.');
+        });
+        console.log('Quitting.');
+        process.exit();
+    }
+
+    // If none of the above checks are true, cycle the auger on and off, then repeat
     augerOn();
     await sleep(process.env.ONTIME);
     augerOff();