VoatSubverseHeader.user.js

// ==UserScript==
// @name        Voat subverses header
// @author      Horza
// @date        15 june 2015
// @description Replaces subverse list
// @include     *://*.voat.co/*
// @include     *://voat.co/*
// @version     1
// @grant       GM_getValue
// @grant       GM_setValue
// @run-at      document-end
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// ==/UserScript==

'use strict';

(function () {

    DisplayCustomSubversesList();

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

function isPageSubverse() {
    if (GetSubverseName() != null) {
        return true;
    }
    return false;
}

function GetSubverseName() {
    var re = new RegExp(/voat\.co\/v\/([\w\d]*)/);
    var m = re.exec(window.location.href);

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

function isPageInShortcuts() {
    var subversesArr = GetSubversesList();
    var subName = GetSubverseName();
    for (var i in subversesArr) {
        if (subversesArr[i] == subName) {
            return true;
        }
    }
    return false;
}

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>';
    }
    $(btnHTML).insertAfter(".btn-whoaverse-paging.btn-xs.btn-default.btn-sub");
}
$('#GM_Shortcut').click(function () {
    if (isPageInShortcuts()) {
        RemoveFromShortcuts(GetSubverseName());
    }
    else {
        AddToShortcuts(GetSubverseName());
    }
});

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

    ToggleButton(false);
    DisplayCustomSubversesList();
}

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

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

    ToggleButton(true);
    DisplayCustomSubversesList();
}

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');
    }
}

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

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