extension.js

const vscode = require('vscode');
const fetch = require("node-fetch");
const https = require('https');

/*

I'm forced to use "rejectUnauthorized" because latest electron version
shipped with VS Code (as 26th of February 2022) is still using node 14, and suffer
of an hardcoded root certificate issue for let's encrypt

This is the workaround suggested by Microsoft:

https://github.com/microsoft/vscode/issues/136787#issuecomment-969065291

*/

https.globalAgent.options.rejectUnauthorized = false;

var myStatusBarItem;
var hideStatusBar;

// Used to retain a cache instead of calling the web API often
var cachedData;
var cacheTtl = 10920; // Expressed in ms. 10920 ~ slightly more than 3hrs

// Strings used for status bar

const BAR_COLLAPSED = `$(ruby) Click for Comfucius`;
const BAR_LOADING = `$(ruby) Loading... `;
const BAR_ERROR = `$(ruby) No quotes ಥ_ಥ `;

/**
 * @param {vscode.ExtensionContext} context
 */
function activate(context) {

	// -9999 will set a very low priority for status bar ordering, thus making sure
	// I will be always the "left-anchored" rightmost component
	myStatusBarItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left, -9999);

	const toggleVis = 'comfucius.toggleVisibility';
	context.subscriptions.push(vscode.commands.registerCommand(toggleVis, () => {
		hideStatusBar = !hideStatusBar;
		if (hideStatusBar)
			myStatusBarItem.text = BAR_COLLAPSED;
			else
			myStatusBarItem.text = BAR_LOADING;
	}));
	myStatusBarItem.command = toggleVis;

	context.subscriptions.push(myStatusBarItem);
	myStatusBarItem.show();
	refreshPhrase();
}

function deactivate() {}

function refreshPhrase(){

	if(cachedData){

		// Pass cloned object to avoid cache clearing while parsing the phrase
		showPharse({...cachedData});

	}
	else{

		// @ts-ignore
		fetch('https://comfucius.xyz/quotes/api/get-fake-quote')
		.then(response => response.json())
		.then(dataFromApi => {

			// Save inside cache data I've retrieved from API...
			cachedData = dataFromApi;

			// ...but also dischange it after a certain amount of time
			setTimeout(()=>{ cachedData = null }, cacheTtl * 1000);
			
			showPharse(cachedData);	

		});
	
	}

}

async function showPharse(data){
	
	if (data != null){

		// Build the fake quote from the input data

		let fakeQuote = `${data.Phrase} ~ ${data.Thinker}`;

		if (hideStatusBar)
			myStatusBarItem.text = BAR_COLLAPSED;
		else
			myStatusBarItem.text = `$(megaphone) ${fakeQuote}`;

		var textLength = fakeQuote.length;
		await new Promise(r => setTimeout(r, vscode.workspace.getConfiguration().get('comfucius.startScrollDelay') * 1000));
		while (textLength > 0){
			textLength--;
			fakeQuote = fakeQuote.substring(1);
			if (hideStatusBar)
				myStatusBarItem.text = BAR_COLLAPSED;
			else
				myStatusBarItem.text = `$(megaphone) ${fakeQuote}`;
			await new Promise(r => setTimeout(r, vscode.workspace.getConfiguration().get('comfucius.scrollPerCharacter') * 1000));
		}

	}
	else{
		if (hideStatusBar)
			myStatusBarItem.text = BAR_COLLAPSED;
		else
			myStatusBarItem.text = BAR_ERROR;
		await new Promise(r => setTimeout(r, 10000));
	}	
	setTimeout(refreshPhrase, vscode.workspace.getConfiguration().get('comfucius.timeDelay') * 1000);
}

module.exports = {
	activate,
	deactivate
}