// ==UserScript==
// @name           Unizar profesores - csv generator
// @namespace      Violentmonkey Scripts
// @match          https://estudios.unizar.es/estudio/asignaturas*
// @icon           data:image/png;base64,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
// @grant          none
// @version        1.0
// @author         Abel
// @description    Para Miguel
// ==/UserScript==
(function() {
  
  // javascript thingies
  Array.prototype.groupBy = function(keyGetter, valueGrouper = (x => x)) {
 	 return Object.fromEntries(Object.entries(Object.groupBy(this, keyGetter)).map(([k, kv]) => [k, valueGrouper(kv)]));
	};
  Object.prototype.entries = function(){return Object.entries(this);};
  
  
  
  // global parser
  const parser = new DOMParser();
  
  // download button
  const btn = document.createElement("button")
  btn.innerText = "Descargar csv con emails de profesores";
  btn.className = "btn btn-primary";
  btn.onclick = main;
  document.getElementById("pjax-main").insertAdjacentElement('beforebegin', btn);
  btn.insertAdjacentElement('afterend', document.createElement("hr"));
  
  function main(){
    btn.disabled = true;
  	_main()
      .catch(e=>{
      	console.log(e);
    		btn.innerText += " - An error ocurred, press to try again";
    	})
      .finally(e=> btn.disabled = false)
  }
  
  async function _main() {
    // get urls from all subjects
    const subjects = [...document.querySelectorAll(".table > tbody > tr > td:nth-child(4) > a")].map(a => [a.href, a.innerText]);
    btn.innerText = `Obteniendo profesores de ${subjects.length} asignaturas...`;
    console.log("Fetching subjects...", subjects);
    const htmls = await Promise.all(subjects.map(([url, subject]) => fetch(url).then(r => r.text()).then(t => [t, subject])));
    console.log("...done", htmls);

    // parse subject documents and extract professors directories
    const directories = htmls.flatMap(([html, subject]) =>
      [...parser.parseFromString(html, "text/html").querySelectorAll("#w0 > tbody > tr")]
      .filter(e => e.innerText.startsWith("Profesores"))
      .flatMap(e => [...e.querySelectorAll("td > a")])
      .map(a => a.href)
      .map(a => a.replaceAll("https://janovas.unizar.es/sideral/CV/", '').replaceAll("?lang=es", '').replaceAll("-", '%20'))
      .map(u => ["https://directorio.unizar.es/rest/persona/persona_cadena?cadena=" + u, subject])
    ).groupBy(d=>d[0], ds=>ds.map(d=>d[1]).join(", ")).entries();
    btn.innerText = `Obteniendo correos de ${directories.length} profesores...`;
    console.log("Fetching directories...", directories)
    const professors = await Promise.all(directories.map(([url, subjects]) => fetch(url).then(r => r.json()).then(j=>[j, subjects])))
    console.log("...done", professors)

    // generate csv table
    const table = "Nombre,Apellidos,Email,Asignaturas\n" + professors.map(([data, subjects]) => data.map(d => `${d.nombPersona || ''},${d.ape1Persona || ''} ${d.ape2Persona || ''},${d.email || ''},"${subjects}"`)).flatMap(l => [...new Set(l)]).join("\n");
    console.log(table);
    btn.innerText = `Generada tabla con ${table.split("\n").length} profesores`;

    // download as file
    const link = document.createElement("a");
    link.href = "data:text/csv;charset=utf-8,%EF%BB%BF" + encodeURI(table);
    link.download = [...document.querySelectorAll("#contenedor-principal > h1 , #contenedor-principal > h2 , #contenedor-principal > h3 , #contenedor-principal > h4")].map(e => e.innerText).join(" ") + ".csv";
    link.click();
    btn.innerText += " - Pulsa para re-descargar";
  }
})()