Unsubscribe unavailable Teardown mods

unsubscribe_unavailable.js

/*
# unsubscribe_unavailable.js
 This script will go through your Steam Workshop mod subscriptions for
 Teardown mods and unsubscribe from any that are unavailable (e.g. private).
## Usage:
 1. Open a tab to any page on the steamcommunity.com domain
 2. Open developer tools (Ctrl+Shift+I or F12)
 3. Go to "Console" tab
 4. Copy and paste the contents of this file into it
 4.a.: Don't do this unless you trust me. Malicious code in the developer
       console can steal your Steam account among other things.
 4.b.: Firefox will prevent you from pasting and warn you about the
       aformentioned danger. Follow the instructions in the warning to enable
       pasting.
 5. Wait for it to finish
## Rationale:
 Recently, many Teardown players have reported hitching at regular intervals.
 It has been determined that the cause of the hitching is being subscribed to
 mods that are no longer available. An unavailable mod is a mod that you can't
 access, e.g. a mod that was subscribed to while public that is now private.
 This script will go through all of your subscribed Teardown mods and
 unsubscribe from any that are unavailable. Note that you can't subscribe to a
 mod that is unavailable, so this process is irreversible. You can change the
 "const UNSUBSCRIBE = true;" to "const UNSUBSCRIBE = false;" and it won't
 unsubscribe. Instead, it will just tell you which mods were unavailable in
 the console.
*/
"use strict";
(async () => {
	const UNSUBSCRIBE = true;
	let i = 0;
	let mod_total;
	const textarea = document.createElement("textarea");
	const bad = [];
	let page_count;
	let mod_count = 0;
	let session_id;
	while (1) {
		++i;
		if (page_count === undefined) {
			if (i !== 1) {
				throw `i is ${i} when page_count is undefined`;
			}
		} else if (i > page_count) {
			break;
		}
		const response = await fetch(`https://steamcommunity.com/my/myworkshopfiles/?appid=1167630&browsefilter=mysubscriptions&p=${i}&numperpage=30&l=english`);
		if (!response.ok) {
			throw `${response.status} ${response.statusText}`;
		}
		const text = await response.text();
		const parser = new DOMParser();
		const doc = parser.parseFromString(text, (response.headers.get("content-type") ?? "text/html").split(";")[0]);
		if (mod_total === undefined) {
			mod_total = parseInt(doc.getElementsByClassName("workshopBrowsePagingInfo")[0].innerText.trim().match(/^Showing \d+\-\d+ of (\d+) entries$/)[1]);
			page_count = Math.ceil(mod_total/30);
		}
		if (session_id === undefined) {
			session_id = doc.querySelector("[name=\"sessionid\"]").value;
		}
		const queue = [];
		Array.prototype.forEach.call(doc.getElementsByTagName("script"), script => {
			const json = (script.textContent.match(/^\s*SharedFileBindMouseHover\s*\(\s*\"Subscription\d+\"\s*,\s*true\s*,\s*(.+)\s*\)\s*;\s*$/) ?? [])[1];
			if (!json) {
				return;
			}
			queue.push(JSON.parse(json));
		});
		for (let j=0; j<queue.length; ++j) {
			++mod_count;
			const data = queue[j];
			const id = parseInt(data.id);
			const app_id = parseInt(data.appid);
			textarea.innerHTML = data.title;
			const title = textarea.value;
			console.log("%d/%d: Checking if mod ID %s ('%s') is available", mod_count, mod_total, id, title);
			const response = await fetch(`https://steamcommunity.com/sharedfiles/filedetails/?id=${id}`);
			if (!response.ok) {
				throw `${response.status} ${response.statusText}`;
			}
			const text = await response.text();
			const parser = new DOMParser();
			const doc = parser.parseFromString(text, (response.headers.get("content-type") ?? "text/html").split(";")[0]);
			if (
				doc.getElementsByClassName("error_ctn").length === 0
				//&& id !== 2992268368
			) {
				continue;
			}
			bad.push({
				data: data,
				id: id,
				app_id: app_id,
				title: title,
				mod_count: mod_count,
				i: i,
				j: j,
				response: response,
				text: text,
				doc: doc,
			});
			console.info("%d/%d: Got error when trying to access mod ID %s ('%s')", mod_count, mod_total, id, title);
		}
		//break;
	}
	console.log("Found %d unavailable mods out of %d total checked across %d pages", bad.length, mod_count, i);
	for (let j=0; j<bad.length; ++j) {
		const bad_mod = bad[j];
		console.info("Mod ID %s on page %d/%d is no longer available.", bad_mod.id, bad_mod.i, page_count);
		console.log("Technical information: %o", bad_mod);
		if (UNSUBSCRIBE) {
			console.log("Unsubscribing");
			const response = await fetch("https://steamcommunity.com/sharedfiles/unsubscribe", {
				method: "POST",
				body: new URLSearchParams({
					id: bad_mod.id,
					appid: bad_mod.app_id,
					sessionid: session_id,
				}),
			});
			if (!response.ok) {
				console.error("Expected successful response, got %d %s. Full response: %o", response.status, response.statusText, response);
				continue;
			}
			const json = await response.json();
			if (json.success !== 1) {
				console.error("Expected success value of 1, got %d. Full response: %o", json.success, json);
			}
		}
	}
})();