Netflix display IMDb ratings

Add a display of IMDb ratings below movie and show titles while browsing Netflix.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Netflix display IMDb ratings
// @namespace    driver8.net
// @version      0.2.1
// @description  Add a display of IMDb ratings below movie and show titles while browsing Netflix.
// @author       driver8, TeluguGameboy
// @match        *://*.netflix.com/*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @grant        GM_getValue
// @grant        GM_setValue
// @require      https://greasyfork.org/scripts/390115-imdb-utility-library-api/code/IMDb%20Utility%20Library%20(API).js?version=733074
// @connect      omdbapi.com
// @connect      imdb.com
// ==/UserScript==

(function() {
    'use strict';

    console.log('hi netflix');

    const pending = new Set(),
          MAX_RESULT_AGE = 30;

    // Adds CSS which displays the score in a circular div.
    function addDiv(movieOrShowTitle, data) {
        // Makes sure that we only add the div once.
        if (document.getElementById(data.id)) return;

        const el = document.querySelector('.bob-title');
        if (el && el.textContent.trim() === movieOrShowTitle) {
            // Styling the div to be red, circluar, and have large white text.
            const div = document.createElement("div");
            div.classList.add('imdb-rating');
            div.dataset.title = movieOrShowTitle;
            div.textContent = data.rating;
            div.id = data.id;

            el.parentNode.insertBefore(div, el.nextSibling);
        }
    }

    // This function gets the data from imdb and calls the function to display it.
    function getIMDbScore(movieOrShowTitle) {
        var data = GM_getValue(movieOrShowTitle);

        let age_check = true;
        try {
            age_check = Date.now() - new Date(data.dateFetched).getTime() < MAX_RESULT_AGE * 24 * 60 * 60 * 1000; // Update data for results older than X days
        } catch (e) {
            age_check = false;
        }
        if (data instanceof Object && data.hasOwnProperty('rating') && age_check) {
            console.log('EXISTS', data);
            addDiv(movieOrShowTitle, data);
        } else if (pending.has(movieOrShowTitle)) {
            // Do nothing
            //console.log(movieOrShowTitle, 'pending');
        } else {
            console.log(movieOrShowTitle, 'starting');
            pending.add(movieOrShowTitle);

            // Use IMDb Utility Library function to get the data
            getImdbInfoFromTitle(movieOrShowTitle).then((data) => {
                console.log('got data', data);
                GM_setValue(movieOrShowTitle, data);
                addDiv(movieOrShowTitle, data);
            }).catch((err) => {
                console.log(`Error getting data for ${movieOrShowTitle}: ${err}`);
            });
        }
    }

    // Main code!
    // Allows extension to observe changes to the dom.
    var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;

    // Define an observer that looks for a specific change.
    var observer = new MutationObserver(function(mutations, observer) {
        let titleEl = document.querySelector('.bob-title');
        if (titleEl) {
            let movieOrShowTitle = titleEl.textContent.trim(),
                ratingDiv = document.querySelector('.imdb-rating');

            // If a div exists for this title, do nothing
            if (!(ratingDiv && ratingDiv.dataset.title && ratingDiv.dataset.title === movieOrShowTitle)) {
                // Display score by getting imdb score and adding to dom.
                getIMDbScore(movieOrShowTitle);
            }
        }
    });

    // Define what element should be observed by the observer and what types of mutations trigger the callback.
    var target = document; // document.querySelector(".mainView");
    observer.observe(target, {
        subtree: true,
        childList: true
    });

    GM_addStyle(
`
.imdb-rating {
width: 36px;
height: 28px;
line-height: 29px;
border-radius: 18%;
background: #f5c518;
color: black;
text-align: center;
font-size: 18px;
font-weight: bold;
`
    );

})();