browser script to process facebook friends in bulk

facebook-friend-process.js

// THIS SCRIPT WORKS ON THE FOLLOWING FACEBOOK PAGE
// https://www.facebook.com/[yourprofile]/friends

let loopcancel = false;
let next_friend = 0;

// not reliable... will also return liked pages and events
let friendTileClasses = 'bp9cbjyn ue3kfks5 pw54ja7n uo3d90p7 l82x9zwi n1f8r23x rq0escxv j83agx80 bi6gxh9e discj3wi hv4rvrfc ihqw7lf3 dati1w0a gfomwglr';

function get_friends() {
	let friends = [];
	let buttons = get_friend_buttons()
	for (let button of buttons) {
		let el = button.parentElement.parentElement.parentElement.parentElement;
		let text = el.innerText;
		let [name, mutual] = text.split('\n');
		friends.push({ el, text, name, mutual, button })
	}
	return friends;
}

function cancel() {
	loopcancel = true;
}

function scroll() {
	window.scrollTo(0, document.getElementsByTagName('html')[0].offsetHeight)
}

function start(start_at = 0){
	loopcancel = false;
	next_friend = start_at;
	loop();
}

function get_friend_buttons() {
	return document.querySelectorAll('[aria-label=Friends][role=button]');
}

function loop() {
	// abort and reset the cancel flag
	if (loopcancel) return;
	let friends = get_friends()

	// should we quit?
	if (next_friend >= friends.length) {
		console.log('done');
		return;
	}

	// should we try to grab more friends?
	if (next_friend >= friends.length-5) {
		scroll();
	}
	
	// do the clicking
	let friend = friends[next_friend];
	console.log(`\nCHECKING: ${friend.name} (#${next_friend})`)
	friend.el.scrollIntoViewIfNeeded()
	friend.button.click();
	
	// follow timeout
	setTimeout(()=>{
		click_follow();
		
		// close_menu timeout
		setTimeout(()=>{
			
			close_menu();
			next_friend++;
			setTimeout(loop, 200); // the menu closes really fast
		},1200); // the follow operation might take a smidge
	},200); // menu opens really fast
}

function click_follow() {
	click_ok(); // clear any dialogs that popped up
	
	let menuitems = document.querySelectorAll('[role=menuitem]')
	for (let item of menuitems) {
		if (item.innerText == 'Follow') {
			console.log('clicking follow');
			item.click();
			return;
		}
	}
	console.log('already following');
}

function click_ok() {
	let okbutton = document.querySelectorAll('[aria-label="OK"]');
	if (okbutton.length > 0) okbutton[0].click()
}

function close_menu() {
	document.getElementsByTagName('body')[0].click();
}

I find greater success when I make the timings a bit longer.