Ignore button for ricochet

ignore.js

// ==UserScript==
// @name       Ricochet Ignore Button
// @namespace  http://www.doxsey.net
// @version    1.0
// @description  ignore users
// @match      http://ricochet.com/*
// @copyright  2013, Caleb Dioxsey
// ==/UserScript==

$(function() {
    var ignored = JSON.parse(localStorage.getItem("GM-ignored") || "{}");

    function ignore(author) {
        ignored[author] = true;
        localStorage.setItem("GM-ignored", JSON.stringify(ignored));
        refresh();
    }
    
    function unignore(author) {
        delete ignored[author];
        localStorage.setItem("GM-ignored", JSON.stringify(ignored));
        refresh();
    }
    
    function show($el) {
        $el.css("opacity", 1);
        $el.find(".body, .action-links, .profile-image").show();
        $el.find(".show-ignored, .unignore").remove();
    }
    
    function hide($el) {
        $el.css("opacity", 0.5);
        $el.find(".body, .action-links, .profile-image").hide();
        $el.find(".author").after([
            '<a href="#show" class="show-ignored"> · Show</a> ',
            '<a href="#unignore" class="unignore"> · Unignore</a> ',
        ].join(""));
    }
    
    function refresh() {
        $("div.comment").each(function() {
            if (ignored[$(this).attr("author_id")]) {
                hide($(this));
            } else {
                show($(this));
            }
        });
    }
        
    $(".action-links ul").append([
        '<li>·  <a href="#ignore" class="ignore">Ignore</a></li>'
    ].join(""));
    
    $("body")
        .on("click", ".ignore", function(evt) {
            evt.preventDefault();
            ignore($(this).closest("[author_id]").attr("author_id"));
        })
        .on("click", ".unignore", function(evt) {
            evt.preventDefault();
            unignore($(this).closest("[author_id]").attr("author_id"));
        })
        .on("click", ".show-ignored", function(evt) {
            evt.preventDefault();
            show($(this).closest(".comment"));
        });
    
    refresh();
});