Improve Stack Overflow

// ==UserScript==
// @name         Improve Stack Overflow
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Helps Stack Overflow to be a more enjoyable website to use.
// @author       Blue Cow
// @match        https://stackoverflow.com/*
// @grant        none
// ==/UserScript==

var USER_ID = 100;

function hide_annoying_page_elements() {
    'use strict';

    // Hide the area about developer jobs.
    $("#nav-jobs").hide();
    // Hide the button for the review queues.
    $(".js-review-button").hide();
    // Modify the sidebar to behave better.
    hide_sidebar_distractions();
    // When the sidebar changes, run its mutator again.
    var mo = new MutationObserver(hide_sidebar_distractions);
    $("#sidebar").each(function() { mo.observe(this, {childList: true, subtree: true}); });
}

function hide_sidebar_distractions() {
    'use strict';

    // Hide everything except the Ask Question button, statistics about the question, and linked questions.
    $("#sidebar > :not(.aside-cta,.question-stats,.sidebar-linked)").hide();

}

function prevent_reputation_loss() {
    'use strict';

    // Prevent loosing reputation from downvoting.
    $(".vote-down-off").hide();
    // Prevent loosing reputation from making bounties.
    $(".bounty-link").hide();
}

function block_broken_elements() {
    'use strict';

    // Block all imgur images since the proxy interferes.
    $("img[src*='i.stack.imgur.com']").hide();
    $("a[href*='i.stack.imgur.com']").hide();
}

function help_review_tag(tag_name) {
    'use strict';

    var question_with_tag = $(`.post-taglist a[href='/questions/tagged/${tag_name}']`).length > 0;
    // Only help to review tags of tag_name.
    if (question_with_tag) {
        var pending_close_or_reopen = $(".existing-flag-count").length > 0;
        // Push through close or reopen votes if possible.
        if (pending_close_or_reopen) {
            $(".close-question-link:not([title^='You voted to '])").click();
        }
        var not_needed = pending_close_or_reopen || $("[title^='vote to reopen']").length > 0;
        var probably_duplicate = $("span.comment-copy:contains(Possible duplicate of)").length > 0;
        probably_duplicate = probably_duplicate || $(".question-originals-of-duplicate").length > 0;
        var question_by_me = $(`.question .user-details a[href^='/users/${USER_ID}/']`).length > 0;
        // Promote questions that have no negative signs if they are not my own.
        if ((!not_needed || probably_duplicate) && !question_by_me) {
            $(".question a.vote-up-off:not(.vote-up-on)").click();
        }
        var has_accepted_answer = $(".vote-accepted-on").length > 0;
        var answer_by_me = $(`.accepted-answer .user-details a[href^='/users/${USER_ID}/']`).length > 0;
        // Promote answers that appear to be correct if they are not my own.
        if (has_accepted_answer && !answer_by_me) {
            $(".accepted-answer a.vote-up-off:not(.vote-up-on)").click();
        }
    }
}

function change_background_colors(shift) {
    'use strict';

    var white = 0xFF;
    var interesting = $(".tagged-interesting");
    var old_color = interesting.css("background-color").match(/^rgb\((\d+), (\d+), (\d+)\)$/).slice(1).map(x => parseInt(x));
    var new_color = "#" + old_color.map(x => (white - (white - x) * shift).toString(16).padStart(2, "0")).join("");
    interesting.css({"background-color": new_color});
}

(function() {
    'use strict';

    hide_annoying_page_elements();
    prevent_reputation_loss();
    block_broken_elements();
    setTimeout(function() { change_background_colors(3); }, 500);
    setTimeout(function() { help_review_tag("python-3.x"); }, 1000);
})();