Twitter API 1.1 tweets / favorites (likes) / following / followers backup in web browser

twitter_api_1.1_backup.js

/* Twitter API 1.1 tweets / favorites (likes) / following / followers backup in web browser
 * Get your access keys to use Twitter API 1.1: https://dev.twitter.com/docs/auth/tokens-devtwittercom
 * You can change Twitter API URL and Twitter screen_name, then execute script from a trusted web page without CSP protection like about:blank in a web browser console (F12 or Ctrl+Shift+K shortcut)
 * A textarea will appear so you can copy/paste to save data as a CSV file or search tweets / users in your web browser (Ctrl+F shortcut)
 * You can then view your backup in a spreadsheet editor like LibreOffice Calc
 * You can also compare the backup with another one to see who unfollowed you, who changed their Twitter username by looking at the user ID or which tweet you retweeted / favorited was deleted (e.g. with the Linux diff command)
 * 
 * Note about the tweets backup:
 * Usually you will search tweets that you retweeted using Twitter web version (https://twitter.com/search) with a search like "from:your_username filter:nativeretweets keyword"
 * But it is limited to the retweets of the last 7 days, like for the free version of the search API (https://developer.twitter.com/en/docs/tweets/search/overview/standard)
 * An alternative is to search tweets in your user timeline with this script but it is limited to your last 3200 tweets (including retweets and replies)
 * This script can be combined with the Twitter feature to backup data, which is not limited to your last 3200 tweets but you can only request a backup every 30 days
 * To find tweets that you retweeted or favorited / liked from a specific person, you can open the CSV file with LibreOffice Calc, click on the column you want to search and press Ctrl+H to search a username
*/


var url = "https://api.twitter.com/1.1/statuses/user_timeline.json"
//var url = "https://api.twitter.com/1.1/favorites/list.json";
//var url = "https://api.twitter.com/1.1/friends/list.json";
//var url = "https://api.twitter.com/1.1/followers/list.json";

var accessor = {
	token: "XXX",
	tokenSecret: "XXX",
	consumerKey : "XXX",
	consumerSecret: "XXX"
};
var message = {
	action: url,
	method: "GET",
	parameters: {
		screen_name: "jack",
		count: 200,
		callback: "getJSONP"
	}
};

var out = [];
var length = -1;
var start = 0;
var next = -1;
var res;

function getJSONP(data)
{
    res = data;
}

function loadAPI_tweets()
{
	if (length != 1)
	{
		if (next != -1) {
			message.parameters.max_id = next;
		}
		OAuth.completeRequest(message, accessor);
		OAuth.SignatureMethod.sign(message, accessor);

		var script3 = document.createElement("script");
		script3.setAttribute("src", url + '?' + OAuth.formEncode(message.parameters));
		document.body.appendChild(script3);
		script3.addEventListener("load", function() {
			length = res.length;
			for (var i = 0; i < length; ++i) {
				var text, name, id;
				
				if (res[i].retweeted_status) {
					text = res[i].retweeted_status.full_text;
					name = res[i].retweeted_status.user.screen_name;
					id = res[i].retweeted_status.user.id;
				} else {
					text = res[i].full_text;
					name = res[i].user.screen_name;
					id = res[i].user.id;
				}
				
				out[start + i] = res[i].created_at + '\t'
					+ name + '\t"""'
					+ id + '"""\t"' // backup user ID to track a user who deleted a tweet you retweeted / favorited (even if the user changed his username)
					+ text.replace(/"/g, '""') + '"\t"""'
					+ res[i].id_str + '"""';
				// CSV with tab separator: quote to allow multiline string; escape quote string delimiter with double quote; display large numbers correctly as string with triple quote
			}
			next = res[length - 1].id_str;
			start += length - 1;
			loadAPI_tweets();
		});
	}
	else
	{
		displayData();
	}
}

function loadAPI_users()
{
	if (length == -1 || res.next_cursor_str != 0) {
		message.parameters.cursor = next;
		OAuth.completeRequest(message, accessor);
		OAuth.SignatureMethod.sign(message, accessor);

		var script3 = document.createElement("script");
		script3.setAttribute("src", url + '?' + OAuth.formEncode(message.parameters));
		document.body.appendChild(script3);
		script3.addEventListener("load", function() {
			length = res.users.length;
			for (var i = 0; i < length; ++i) {
				out[start + i] = res.users[i].screen_name + '\t'
					+ res.users[i].name.replace(/"/g, '""') + '\t"""'
					+ res.users[i].id + '"""';
			}
			next = res.next_cursor_str;
			start += length;
			loadAPI_users();
		});
	}
	else {
		displayData();
	}
}

function displayData()
{
	var box = document.createElement("textarea");
	box.value = out.join('\n');
	document.body.appendChild(box);
}

var script = document.createElement("script");
script.setAttribute("src", "https://pastebin.com/raw/HFjqYLdG"); // http://oauth.googlecode.com/svn/code/javascript/oauth.js (down)
document.body.appendChild(script);
script.addEventListener("load", function() {
var script2 = document.createElement("script");
	script2.setAttribute("src", "https://pastebin.com/raw/M0N8JKwf"); // http://pajhome.org.uk/crypt/md5/sha1.js
	document.head.appendChild(script2);
	script2.addEventListener("load", function() {
		if (url == "https://api.twitter.com/1.1/statuses/user_timeline.json" || url == "https://api.twitter.com/1.1/favorites/list.json") {
			message.parameters.include_rts = true; // include retweets
			message.parameters.tweet_mode = "extended"; // needed to get full tweet after API change
			loadAPI_tweets();
		}
		else {
			loadAPI_users();
		}
	});
});

That is spot on 👌 thanks!