StudentMark Extractor

Script

(async()=>{
  const getVakNaam=()=>{
    const titleEl=document.querySelector('[id$="-titleText-inner"], [id*="-titleText"]');
    return titleEl?.textContent?.trim()||'Onbekend vak';
  };
  const calc=(m)=>((m-70)/3+10);
  const find=(o)=>{
    if(!o||typeof o!=='object')return false;
    for(const k in o){
      if(/studentmark/i.test(k)){
        const v=o[k],n=typeof v==='number'?v:parseFloat(v);
        if(!isNaN(n)&&n>=40&&n<=100){
          const vakNaam=getVakNaam();
          const punt=calc(n);
          console.log(`${vakNaam}: ${punt}/20`);
          return true;
        }
      }
      if(typeof o[k]==='object'&&find(o[k]))return true;
    }
    return false;
  };
  const origF=window.fetch,origO=XMLHttpRequest.prototype.open,origS=XMLHttpRequest.prototype.send;
  window.fetch=function(...a){
    if(typeof a[0]==='string'&&a[0].includes('CourseResultExtSet')){
      return origF.apply(this,a).then(r=>{
        r.clone().json().then(d=>{
          setTimeout(()=>find(d),100);
        }).catch(()=>{});
        return r;
      });
    }
    return origF.apply(this,a);
  };
  XMLHttpRequest.prototype.open=function(...a){this._url=a[1];return origO.apply(this,a);};
  XMLHttpRequest.prototype.send=function(...a){
    if(this._url?.includes('CourseResultExtSet')){
      this.addEventListener('load',function(){
        try{
          setTimeout(()=>find(JSON.parse(this.responseText)),100);
        }catch(e){}
      });
    }
    return origS.apply(this,a);
  };
})();
Video Instructies

Script
