// ==UserScript==
// @name gmx.net: Direkt zum Posteingang
// @description Klickt den "E-Mail"-Button.
// @namespace johnny_english
// @include /^https?://.*navigator\.gmx\.(net|ch|at)//
// @grant none
// @version 1
// @downloadURL none
// ==/UserScript==

// MIT-licence:
// Copyright (c) 2017 Johnny English


// parallel AJAX disallows plain match after "document-end" (equivalent
// document.onreadystatechange ... document.readyState === 'complete')
new MutationObserver(
  // Array, MutationObserver
  function( mutations, new_observer ){
    var thisMO = this;

    // there are 4+ iframes, each with its MO
    var tmr = window.setTimeout( function(){
      thisMO.disconnect();
    }, 2000 );

    // searching through mutations wasn't reliable for some reason
    var x = document.getElementsByTagName( "pos-icon-item" );

    for( j = 0; j < x.length; ++j ){
      if( // right after login, the attr "style" is not present
          ! x[j].hasAttribute( "style" ) &&
          x[j].hasAttribute( "url" ) &&
          x[j].getAttribute( "url" ) == "./mail" ){
        // stop and dispose the particular timer for this MO
        window.clearTimeout( tmr );
        // click on Posteingang
        x[j].getElementsByTagName( "a" )[0].click();
        // stop and dispose this particular MO
        thisMO.disconnect();
        break;
      }
    }
  }
).observe( document, {
  childList: true,
  subtree: true
} );