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Documentation and error handling

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This commit is contained in:
Skylar Grant 2022-12-03 20:54:30 -05:00
parent b91503dfa6
commit 96339fa208
2 changed files with 56 additions and 10 deletions
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47
functions.js
View File

@ -2,12 +2,14 @@
const dotenv = require('dotenv').config();
// Module for working with files
const fs = require('fs');
// Promises I think?
const { resolve } = require('path');
// The functions we'll export to be used in other files
const functions = {
auger: {
// Gets called once the Auger Pin has been setup by rpi-gpio
ready(err) {
if (err) throw err;
console.log('Auger GPIO Ready');
@ -48,14 +50,23 @@ const functions = {
// Sleeps in between cycles using functions.sleep()
cycle(gpio) {
return new Promise((resolve) => {
// Turn the auger on
this.on(gpio).then((res) => {
// Log action if in debug mode
if (process.env.DEBUG == 'true') console.log(res);
// Sleep for the time set in env variables
functions.sleep(process.env.ONTIME).then((res) => {
// Log action if in debug mode
if (process.env.DEBUG == 'true') console.log(res);
// Turn the auger off
this.off(gpio).then((res) => {
// Log action if in debug mode
if (process.env.DEBUG == 'true') console.log(res);
// Sleep for the time set in env variables
functions.sleep(process.env.OFFTIME).then((res) => {
// Log action if in debug mode
if (process.env.DEBUG == 'true') console.log(res);
// Resolve the promise, letting the main script know the cycle is complete
resolve("Cycle complete.");
});
});
@ -65,52 +76,67 @@ const functions = {
},
},
files: {
// Check for a preset-list of files in the root directory of the app
check() {
return new Promise((resolve, reject) => {
// TODO this code needs to be finished from migration
// Check for pause file existing, then sleep for preset time, then run the function again.
// Check for pause file existing
if (fs.existsSync('./pause')) {
// Resolve the promise, letting the main script know what we found
resolve("pause");
}
// Check for reload file existing, then reload environment variables, then delete the file.
// Check for reload file existing
if (fs.existsSync('./reload')) {
// Resolve the promise, letting the main script know what we found
resolve("reload");
}
// Check for quit file existing, then delete it, then quit the program
// Check for quit file existing
if (fs.existsSync('./quit')) {
// Resolve the promise, letting the main script know what we found
resolve("quit");
}
// Resolve the promise, letting the main script know what we found (nothing)
resolve("none");
});
},
},
commands: {
// Pauses the script for the time defined in env variables
pause() {
return new Promise((resolve) => {
functions.sleep(process.env.PAUSETIME).then(() => { resolve(); });
});
},
// Reload the environment variables on the fly
reload(envs) {
return new Promise((resolve) => {
// Re-require dotenv because inheritance in js sucks
const dotenv = require('dotenv').config({ override: true });
// Delete the reload file
fs.unlink('./reload', (err) => {
if (err) throw err;
console.log('Deleted reload file.');
if (process.env.DEBUG == 'true') console.log('Deleted reload file.');
});
// Print out the new environment variables
// This should be printed regardless of debug status, maybe prettied up TODO?
console.log('Reloaded environment variables.');
console.log(`ONTIME=${process.env.ONTIME}\nOFFTIME=${process.env.OFFTIME}\nPAUSETIME=${process.env.PAUSETIME}\nDEBUG=${process.env.DEBUG}\nONPI=${process.env.ONPI}`);
// Resolve the promise, letting the main script know we're done reloading the variables and the cycle can continue
resolve();
});
},
// Shutdown the script gracefully
quit() {
// Delete the quit file
fs.unlink('./quit', (err) => {
if (err) throw err;
console.log('Removed quit file.');
if (process.env.DEBUG == 'true') console.log('Removed quit file.');
});
// Print out that the script is quitting
console.log('Quitting...');
// Quit the script
process.exit();
},
},
@ -118,12 +144,16 @@ const functions = {
sleep(ms) {
return new Promise((resolve) => {
if (process.env.DEBUG == "true") console.log(`Sleeping for ${ms}ms`);
// Function to be called when setTimeout finishes
const finish = () => {
// Resolve the promise
resolve(`Slept for ${ms}ms`);
}
};
// The actual sleep function, sleeps for ms then calls finish()
setTimeout(finish, ms);
});
},
// Initializes rpi-gpio, or resolves if not on a raspberry pi
init(gpio) {
return new Promise((resolve, reject) => {
// Write the current env vars to console
@ -133,13 +163,16 @@ const functions = {
if (process.env.ONPI == 'true') {
gpio.setup(7, gpio.DIR_OUT, (err) => {
if (err) reject(err);
// Resolve the promise
resolve('GPIO Initialized');
});
} else {
// Resolve the promise
resolve('GPIO Not Available');
}
});
},
}
// Export the above object, functions, as a module
module.exports = { functions };

19
main.js
View File

@ -37,32 +37,45 @@ if (process.env.ONPI == 'true') {
// Main function, turns the auger on, sleeps for the time given in environment variables, then turns the auger off, sleeps, repeats.
async function main(fn, gpio) {
// Check for the existence of certain files
fn.files.check().then((res,rej) => {
console.log('File Check: ' + res);
// Log the result of the check if in debug mode
if (process.env.DEBUG == 'true') console.log('File Check: ' + res);
// Choose what to do depending on the result of the check
switch (res) {
case "pause":
// Pause the script
fn.commands.pause().then(() => {
// Rerun this function once the pause has finished
main(fn, gpio);
});
break;
case "reload":
// Reload the environment variables
fn.commands.reload().then(() => {
// Rerun this function once the reload has finished
main(fn, gpio);
});
break;
case "quit":
// Quit the script
fn.commands.quit();
break;
case "none":
// If no special files are found, cycle the auger normally
fn.auger.cycle(gpio).then((res) => {
// Log the auger cycle results if in debug mode.
if (process.env.DEBUG == 'true') console.log(res);
// Rerun this function once the cycle is complete
main(fn, gpio);
});
break;
default:
main(fn, gpio);
break;
// If we don't get a result from the file check, or for some reason it's an unexpected response, log it and quit the script.
console.error(`No result was received, something is wrong.\nres: ${res}`);
fn.commands.quit();
break;
}
});
}