Adds a room bookmark panel to screeps sidebar

Screeps_Room_Bookmark.js

// ==UserScript==
// @name         Screeps Room Bookmarks
// @namespace    https://screeps.com/
// @version      1.0.0
// @author       Mike Lyons, frenchie4111
// @match        https://screeps.com/a/*
// @run-at       document-idle
// @grant        GM_getValue
// @grant        GM_setValue
// ==/UserScript==

/* global angular */

const LIST_VERSION = 1;
const LIST_KEY = 'list';
const LIST_VERSION_KEY = 'list_version';

const ADD_ACTION = 'add';

function getList() {
    let list_string = GM_getValue( LIST_KEY );
    if( !list_string ) return [];
    return JSON.parse( list_string );
}

function setList( new_list ) {
    GM_setValue( LIST_KEY, JSON.stringify( new_list ) );
}

function appendList( new_item ) {
    let list = getList();
    console.log( 'list', list );
    list.push( new_item );
    setList( list );
    return list;
}

function initList() {
    let version = GM_getValue( LIST_VERSION_KEY );
    if( version !== LIST_VERSION ) {
        console.log( 'Version changed, resetting list' )
        setList( [] );
    }
    GM_setValue( LIST_VERSION_KEY, LIST_VERSION );
}

function addButton( text, action ){
    let gameEl = angular.element( $( 'section.game' ) );
    let $rootScope = gameEl.injector().get( '$rootScope' );

    if( !$rootScope.__buttons )
    {$rootScope.__buttons = [];}
    if( !$rootScope.__buttons.find( b=>b.text == text ) ) {
        $rootScope.__buttons.push( { text, action } );
        console.log( 'Add Button', text, action );
    }
}

/**
 * initUI creates a new menu item.
 * Many thanks to ags131 for providing this
 */
function initUI(){
    console.log( 'initUI' );
    let asidecontent = $( '.aside-content' );
    let gameEl = angular.element( $( 'section.game' ) );
    let $rootScope = gameEl.injector().get( '$rootScope' );
    let $compile = gameEl.injector().get( '$compile' );

    $rootScope.handleButton = function( button ){
        if( button.action === ADD_ACTION ) {
            console.log( 'Adding', window.location.href );
            console.log( appendList( window.location.href ) );
        } else {
            window.location = button.action;
        }
    };

    let elem = $( '<app:aside-block class="player-custom-ui" heading="Room Bookmarks" visibility-model="customuivisible"><md-button class="md-primary md-hue-1 allwidth" ng-repeat="button in $root.__buttons" ng-click="$root.handleButton(button)">{{button.text}}</md-button></app:aside-block>' );
    $compile( elem )( $rootScope );
    elem.appendTo( asidecontent );
}

function init(){
    if( $( '.player-custom-ui' ).length ) return;
    initList();
    initUI();
    addButton( 'Add Room', ADD_ACTION );
    getList()
        .forEach( function( link ) {
            let link_split = link.split( '/' );
            let room_name = link_split.slice( -2 ).join( ' ' );
            addButton( room_name, link );
        } );
}

$( function(){
    setInterval( init,1000 );
} );