Analyze ratings from friends on Letterboxd
当前为
// ==UserScript==
// @name Letterboxd Friend Ratings Analyzer
// @namespace http://tampermonkey.net/
// @version 1.1.2
// @description Analyze ratings from friends on Letterboxd
// @author https://github.com/liam-h
// @match https://letterboxd.com/film/*
// @grant none
// @license GPLv3
// @run-at document-end
// ==/UserScript==
// Sleep function
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
// Get list of elements
const getList = () => document.querySelectorAll(".activity-from-friends > .avatar-list > .listitem");
// Attempt to get list until populated
const finalList = async () => {
let list;
while (!(list = getList()).length) await sleep(100);
return list;
};
// Parse rating text
const parseRating = ratingText => {
if (!ratingText) return 0;
const trimmedText = ratingText.trim().replace("★", "★ ");
const count = (trimmedText.match(/★/g) || []).length;
return count + (trimmedText.includes("½") ? 0.5 : 0);
};
// Get ratings from the list
const getRatings = list => Array.from(list)
.map(item => item.querySelector(".rating")?.textContent)
.map(parseRating)
.filter(rating => rating > 0);
// Calculate average rating
const calculateAverage = ratings => {
if (!ratings.length) return 0;
const sum = ratings.reduce((total, rating) => total + rating, 0);
return (sum / ratings.length).toFixed(1);
};
// Main function
(async () => {
const list = await finalList();
const ratings = getRatings(list);
if (ratings.length) {
const averageRating = calculateAverage(ratings);
const header = document.querySelector(".activity-from-friends > h2.section-heading > a");
if (header) header.innerHTML += ` • Average rating: ${averageRating}`;
}
})();