VoatSubverseHeader.user.js

// ==UserScript==
// @name        Voat subverses header
// @author      Horza
// @date        16 june 2015
// @description Replaces subverse list
// @include     *voat.co*
// @version     1.1
// @grant       GM_getValue
// @grant       GM_setValue
// @run-at      document-end
// @require     https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// ==/UserScript==

'use strict';

var data = {};

(function () {

    data.regexp = new RegExp(/voat\.co\/v\/([\w\d]*)/);
    data.subverseName = GetSubverseName();
    data.isPageSubverse = isPageSubverse();

    DisplayCustomSubversesList();

    if (data.isPageSubverse)
    { AppendButton(); }
}).call(this);

function DisplayCustomSubversesList() {
    var SubString = '';
    var subArr = GetSubversesList();
    
    for (var idx in subArr) {
        SubString += '<li><span class="separator">-</span><a href="/v/' + subArr[idx] + '/">' + subArr[idx] + '</a></li>';
    }
    $('ul#sr-bar').html(SubString);
}

function GetSubversesList() {
    var subversesArr = GM_getValue("Voat_Subverses");
    
    if (subversesArr == undefined) {
        subversesArr = "newsubverses,introductions,news"
        GM_setValue("Voat_Subverses", subversesArr);
    }

    return subversesArr.split(',');
}

function isPageSubverse() {

    if (data.subverseName != null)
    { return true; }

    return false;
}

function GetSubverseName() {
    var m = data.regexp.exec(window.location.href);

    if (m == null) { return null; }
    else { return m[1].toLowerCase(); }
}

function AppendButton() {

    if (!isPageInShortcuts()) {
        var btnHTML = '<button id="GM_Shortcut" type="button" class="btn-whoaverse-paging btn-xs btn-default btn-sub">+ shortcut</button>';
    }
    else {
        var btnHTML = '<button id="GM_Shortcut" type="button" class="btn-whoaverse-paging btn-xs btn-default">- shortcut</button>';
    }

    if ($(".btn-whoaverse-paging.btn-xs.btn-default.btn-unsub").length){
        $(btnHTML).insertAfter(".btn-whoaverse-paging.btn-xs.btn-default.btn-unsub");
    }
    else {
        $(btnHTML).insertAfter(".btn-whoaverse-paging.btn-xs.btn-default.btn-sub");
    }
}

$('#GM_Shortcut').click(function() {

    if (isPageInShortcuts()) {
        RemoveFromShortcuts(data.subverseName);
    }
    else {
        AddToShortcuts(data.subverseName);
    }

    DisplayCustomSubversesList();
});

function isPageInShortcuts() {
    var subversesArr = GetSubversesList();

    for (var i in subversesArr) {
        if (subversesArr[i] == data.subverseName) {
            return true;
        }
    }

    return false;
}

function AddToShortcuts(SubName) {
    var subversesArr = GetSubversesList();
    var str = subversesArr.join(",") + "," + SubName;

    GM_setValue("Voat_Subverses", str);

    ToggleButton(false);
}

function RemoveFromShortcuts(SubName) {
    var subversesArr = GetSubversesList();
    var idx = subversesArr.indexOf(SubName);

    subversesArr.splice(idx, 1);
    GM_setValue("Voat_Subverses", subversesArr.join(","));

    ToggleButton(true);
}

function ToggleButton(state) {

    if (state == true) {
        $("#GM_Shortcut").text('+ shortcut');
        $("#GM_Shortcut").addClass('btn-sub')
    }
    else {
        $("#GM_Shortcut").text('- shortcut');
        $("#GM_Shortcut").removeClass('btn-sub');
    }
}