muhdiboy · October 30, 2024 04:58 · muhdiboy · Feb 22, 2022 · leahrr · Mar 7, 2022
diff --git a/lastfm-automated-remove-duplicates.md b/lastfm-automated-remove-duplicates.md
diff --git a/lastfm-automated-remove-duplicates.user.js b/lastfm-automated-remove-duplicates.user.js
 // ==UserScript==
 // @name         LastFM automated duplicate scrobble deletion script
 // @namespace    https://gist.github.com/muhdiboy
 // @version      1.5.0
 // @downloadURL  https://gist.github.com/muhdiboy/a293cbff355af750e3b8f45ec816d1f1/raw/lastfm-automated-remove-duplicates.user.js
 // @updateURL    https://gist.github.com/muhdiboy/a293cbff355af750e3b8f45ec816d1f1/raw/lastfm-automated-remove-duplicates.user.js
 // @description  Based on https://gist.github.com/sk22/39cc280840f9d82df574c15d6eda6629#gistcomment-3046698, thanks to previous contributors (@CennoxX, @mattsson, @gms8994, @huw and @sk22) and new contributors (@Eiron).
 // @author       muhdiboy
 // @match        https://www.last.fm/*user/*
 // @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
 // @grant        none
 // ==/UserScript==

 (function() {
    // Variables
    let runScript = localStorage.getItem('runScript') === 'true';
    let rmOnlyRealDup = localStorage.getItem('rmOnlyRealDup') !== 'false'; // Set checkbox to checked/true as default
    let numTracks = localStorage.getItem('numTracks') || "5";
    let stopAtPage = localStorage.getItem('stopAtPage') || "0";
    let currentPage = extractQueryParam('page', window.location.href) || 1;

    // Update currentPage when a click event occurs on the page
    window.addEventListener('click', function () {
        currentPage = extractQueryParam('page', window.location.href) || 1;
    });

    // Functions
    let pageURLCheckInterval = setInterval (function () {
        // Check the URL at regular intervals to add or remove buttons
        if ( this.lastPathStr !== location.pathname || this.lastQueryStr !== location.search) {
            this.lastPathStr = location.pathname;
            this.lastQueryStr = location.search;
            if (shouldMatchPage()) createButtons(); else removeButtons();
        }
    }, 125);

    function replaceQueryParam(param, newval, search) {
        // Function to replace a query parameter in the URL
        const regex = new RegExp("([?;&])" + param + "[^&;]*[;&]?");
        const query = search.replace(regex, "$1").replace(/&$/, '');
        return (query.length > 2 ? query + "&" : "?") + (newval ? param + "=" + newval : '');
    }

    function extractQueryParam(name, url) {
        // Function to extract a query parameter from the URL
        if (!url) url = window.location.href;
        name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
        const regexS = "[\\?&]" + name + "=([^&#]*)";
        const regex = new RegExp(regexS);
        const results = regex.exec(url);
        return results == null ? null : results[1];
    }

    function shouldMatchPage() {
        // Function to determine if the current page should be matched
        const url = window.location.href;
        const excludeUrlRegex = /^https:\/\/www\.last\.fm\/.*user\/.*\/library\/(albums|artists|tracks|music).*/;
        const matchUrlRegex = /^https:\/\/www\.last\.fm\/.*user\/.*\/library.*/;
        return matchUrlRegex.test(url) && !excludeUrlRegex.test(url);
    }

    function removeButtons() {
        // Function to remove all buttons from the page
        const cancelButton = document.getElementById('cancelButton');
        const buttonContainer = document.getElementById('buttonContainer');

        if (cancelButton) cancelButton.remove();
        if (buttonContainer) buttonContainer.remove();
    }

    // Buttons
    function createButtons() {
        // Create the cancel button to stop the script
        const cancelButton = document.createElement('button');
        cancelButton.id = 'cancelButton';
        cancelButton.innerHTML = 'Cancel<br>Script';
        cancelButton.style.position = 'fixed';
        cancelButton.style.bottom = '50%';
        cancelButton.style.left = '0';
        cancelButton.style.zIndex = '9999';
        cancelButton.style.fontFamily = 'monospace';
        cancelButton.style.padding = '3px';
        cancelButton.style.border = 'dashed';
        if (runScript) {
            cancelButton.style.color = 'white';
            cancelButton.style.background = 'red';
            cancelButton.style.borderColor = 'firebrick';
            cancelButton.addEventListener('click', function() {
                localStorage.setItem('runScript', 'false');
                localStorage.removeItem('savedUrl');
                location.reload();
            });
        } else {
            cancelButton.style.color = 'gray';
            cancelButton.style.background = 'lightgray';
            cancelButton.style.borderColor = 'lightgray';
            cancelButton.style.cursor = 'default';
        }
        document.body.appendChild(cancelButton);

        if (!runScript) {
            // Create the main button to trigger the script
            const runButton = document.createElement('button');
            runButton.textContent = 'Remove Duplicates';
            runButton.style.position = 'relative';
            runButton.style.display = 'block';
            runButton.style.marginBottom = '5px';
            runButton.style.fontFamily = 'sans-serif';
            runButton.style.fontSize = 'initial';
            runButton.style.border = 'outset';
            runButton.style.borderColor = 'crimson';
            runButton.style.color = 'white';
            runButton.style.background = 'firebrick';
            runButton.style.padding = '5px';
            runButton.addEventListener('click', function () {
                let stopLoop = false;

                while (!stopLoop) {
                    const inputStopAtPage = prompt("Stop at which page?", stopAtPage);
                    if (inputStopAtPage === null) return;
                    if (!/^\d+$/.test(inputStopAtPage)) {
                        alert("Invalid input. Please enter a valid number.");
                        continue;
                    }
                    if (inputStopAtPage > currentPage && !(currentPage === 0 && inputStopAtPage === 1)) {
                        alert("Please enter a page less than or equal to your current page: " + currentPage);
                        continue;
                    }
                    localStorage.setItem('stopAtPage', inputStopAtPage);
                    stopLoop = true;
                }

                if (!rmOnlyRealDup) {
                    stopLoop = false;
                    while (!stopLoop) {
                        const inputNumTracks = prompt("Enter the number of tracks to check for duplicates\n(between 2 and 50):", numTracks);
                        if (inputNumTracks === null) return;
                        if (!/^\d+$/.test(inputNumTracks) || inputNumTracks < 2 || inputNumTracks > 50) {
                            alert("Invalid input. Please enter a valid number between 2 and 50.");
                            continue;
                        }
                        localStorage.setItem('numTracks', inputNumTracks);
                        stopLoop = true;
                    }
                }

                localStorage.setItem('runScript', 'true');
                location.reload();
            });

            // Create the checkbox element
            const rmOnlyRealDupCheckbox = document.createElement('input');
            rmOnlyRealDupCheckbox.type = 'checkbox';
            rmOnlyRealDupCheckbox.id = 'rmOnlyRealDupCheckbox';
            rmOnlyRealDupCheckbox.style.position = 'relative';
            rmOnlyRealDupCheckbox.style.marginLeft = '10px';
            rmOnlyRealDupCheckbox.checked = rmOnlyRealDup;
            rmOnlyRealDupCheckbox.addEventListener('change', function () {
                localStorage.setItem('rmOnlyRealDup', rmOnlyRealDupCheckbox.checked);
            });

            // Create the label for the checkbox
            const rmOnlyRealDupCheckboxLabel = document.createElement('label');
            rmOnlyRealDupCheckboxLabel.style.position = 'relative';
            rmOnlyRealDupCheckboxLabel.style.marginLeft = '5px';
            rmOnlyRealDupCheckboxLabel.style.fontFamily = 'sans-serif';
            rmOnlyRealDupCheckboxLabel.style.fontSize = 'medium';
            rmOnlyRealDupCheckboxLabel.setAttribute('for', 'rmOnlyRealDupCheckbox');
            rmOnlyRealDupCheckboxLabel.textContent = 'Only compare real duplicates?';

            // Create a container element to hold the main button and checkbox
            const buttonContainer = document.createElement('div');
            buttonContainer.id = 'buttonContainer';
            buttonContainer.style.position = 'absolute';
            buttonContainer.style.top = '370px';
            buttonContainer.style.left = '50%';
            buttonContainer.style.transform = 'translate(-50%, -50%)';
            buttonContainer.appendChild(runButton);
            buttonContainer.appendChild(rmOnlyRealDupCheckboxLabel);
            buttonContainer.appendChild(rmOnlyRealDupCheckbox);
            const metaElement = document.querySelector('.content-top-has-nav');
            metaElement.insertAdjacentElement('afterend', buttonContainer);
        }
    }

    // Automated duplicate scrobble deletion and navigation logic
    if (shouldMatchPage()) {
        window.addEventListener('load', function () {
            // Event listener for when the page has finished loading
            if (runScript) {
                let found = 0;
                const initialRefreshTimeout = 5000; // Interval for reloading the page
                let refreshTimeout = parseInt(localStorage.getItem('refreshTimeout')) || initialRefreshTimeout;
                const sections = Array.from(document.getElementsByTagName("tbody"));
                const savedUrl = localStorage.getItem('savedUrl') || window.location.href;

                // If the URL contains "delete", go back to last functioning site
                if (window.location.toString().includes("delete")) window.location.href = savedUrl;

                // If the current page doesn't contain tracks, go back to last functioning site (useful to detect rate-limiting page)
                if (!document.querySelector('.chartlist')) {
                    setTimeout(function() {
                        window.location.href = savedUrl;
                    }, refreshTimeout);
                    localStorage.setItem('refreshTimeout', refreshTimeout + 5000);
                    return;

                } else {
                    refreshTimeout = initialRefreshTimeout;
                    localStorage.setItem('refreshTimeout', initialRefreshTimeout);
                    localStorage.setItem('savedUrl', window.location.href);
                }

                sections.forEach(function (section) {
                    // Loop through each section
                    const els = Array.from(section.rows);
                    const names = els.map(function (el) {
                        const nmEl = el.querySelector('.chartlist-name');
                        const artEl = el.querySelector('.chartlist-artist');
                        if (rmOnlyRealDup) {
                            const tstEl = el.querySelector('.chartlist-timestamp');
                            // Construct the name string including track name, artist and timestamp
                            return nmEl && artEl && tstEl && nmEl.textContent.replace(/\s+/g, ' ').trim() + ':' + artEl.textContent.replace(/\s+/g, ' ').trim() + ':' + tstEl.textContent.replace(/\s+/g, ' ').trim();
                        } else {
                            // Construct the name string including only track name and artist
                            return nmEl && artEl && nmEl.textContent.replace(/\s+/g, ' ').trim() + ':' + artEl.textContent.replace(/\s+/g, ' ').trim();
                        }
                    });

                    names.forEach(function (name, i) {
                        // Loop through each name in the section
                        if (!names.slice(i + 1, i + 1 + parseInt(numTracks)).includes(name)) return;
                        // Check if the current name has duplicates within the specified range
                        const delBtn = els[i].querySelector('[data-ajax-form-sets-state="deleted"]');
                        // If a delete button is found, click it and increment the counter
                        if (delBtn) { delBtn.click(); found++; }
                    });
                });

                if (found > 0) {
                    // If duplicates were found, reload the page after refreshTimeout
                    setTimeout(function() {
                        location.reload();
                    }, refreshTimeout);
                    return;
                }

                if (currentPage <= stopAtPage) {
                    // Stop the Script and message user
                    localStorage.setItem('runScript', 'false');
                    localStorage.removeItem('savedUrl');
                    alert("LastFM duplicate deletion complete.");
                    location.reload();
                }

                // Go up one page
                else window.location.href = window.location.pathname + replaceQueryParam('page', extractQueryParam('page', window.location.href) - 1, window.location.search);
            }
        });
    }
 })();