hol-hashtags

/// holhashtags.js
(function() {
  let traad = [];
  const hht_find_svar = (id) => {
    for (let i in traad) if (traad[i].id === id) return traad[i];
    return null;
  };
  const hht_find_ref = (svar, ref, put) => {
    for (let ri in svar.ref) if (svar.ref[ri] === ref) return ri;
    if (put) return svar.ref.push(ref) - 1;
    return -1;
  };
  const hht_tjek_svar = (svar) => {
    let tc = 0;
    let ti = 0;
    while ((tc < 10) && (ti < svar.text.childNodes.length)) {
      let te = svar.text.childNodes[ti];
      if (te.nodeType === 3) {
        let tp = te.nodeValue.indexOf('#');
        while (tp >= 0) {
          let tpe = tp + 1;
          while ((tpe < te.nodeValue.length) && ('0123456789'.indexOf(te.nodeValue.charAt(tpe)) >= 0)) tpe++;
          let val = parseInt(te.nodeValue.substring(tp+1, tpe));
          let ref = hht_find_svar(val);
          if (ref) {
            hht_find_ref(ref, svar.id, true);
            let foer = document.createTextNode(te.nodeValue.substring(0, tp));
            let link = document.createElement('a');
            link.href = '#' + (val === 0 ? 'traadstart' : val);
            link.innerText = '#' + val;
            link.className = 'hht_lnk';
            let efter = document.createTextNode(te.nodeValue.substring(tpe, te.nodeValue.length));
            svar.text.insertBefore(foer, te);
            svar.text.insertBefore(link, te);
            svar.text.insertBefore(efter, te);
            svar.text.removeChild(te);
            te = efter;
            tp = te.nodeValue.indexOf('#');
            tc++;
          } else tp = te.nodeValue.indexOf('#', tp + 1);
        }
      }
      ti++;
    }
  };
  const hht_lav_ref = (svar) => {
    if (svar.ref.length > 0) {
      let div = document.createElement('div');
      div.className = 'hht_div';
      let hdr = document.createElement('span');
      hdr.className = 'hht_hdr';
      hdr.innerText = 'Refereret: ';
      div.appendChild(hdr);
      for (let rfi in svar.ref) {
        let ref = document.createElement('a');
        ref.className = 'hht_ref';
        ref.innerText = '#' + svar.ref[rfi];
        ref.href = ref.innerText;
        div.appendChild(ref);
      }
      svar.text.appendChild(div);
    }
  };
  const hht_indlaes = () => {
    let desc = document.getElementById('ContentPlaceHolder_ContentPlaceHolder_traaddesc');
    let svar = document.getElementById('ContentPlaceHolder_ContentPlaceHolder_svar');
    if (desc && svar) {
      let css = document.createElement('style');
      css.setAttribute('type', 'text/css');
      css.innerText = 'div.hht_div { font-size:smaller; margin-top:.5em; padding-top:.5em; border-top:1px solid #eeeeee; }\n' +
                      'span.hht_hdr { color:gray; font-weight:bold; }\n' +
                      'a.hht_lnk {  }\n' +
                      'a.hht_ref { margin-right:.25em; }';
      document.head.appendChild(css);
      traad.push({text:desc,id:0,ref:[]});
      for (let svi in svar.children) {
        let sve = svar.children[svi];
        let svo = {text:null,id:0,ref:[]};
        for (let chi in sve.children) {
          let che = sve.children[chi];
          if (che.className === 't47-svar-top') {
            let a = che.getElementsByTagName('a');
            if (a.length > 0) {
              let sid = parseInt(a[0].name);
              if ((!isNaN(sid)) && (sid > 0)) svo.id = sid;
            }
          } else if (che.className === 't47-svar-content') svo.text = che;
        }
        if (svo.text && (svo.id > 0)) traad.push(svo);
      }
      console.log('Scriptlet injection = ' + traad.length);
      for (let svi = 1; svi < traad.length; svi++) hht_tjek_svar(traad[svi]);
      for (let svi in traad) hht_lav_ref(traad[svi]);
    }
  };
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', hht_indlaes);
  else hht_indlaes();
})();