Example to fill textarea with excel and csv files27.04.23

with the help of https://www.npmjs.com/package/xlsx

async function clear_textarea()
{
    let t = document.getElementsByTagName("textarea")

for(let i in t)
    {
        if(t[i].type === 'textarea')
        {
            t[i].value = "";
        }
    }
}

async function random_filler(styles)
{
    let rows = []
    for(let x=0;x<=10;x++)
    {
      let rkey =  Math.floor(Math.random() * styles.length);
      let key = styles[rkey];
      let rvalue =  Math.floor(Math.random() * 1000);        
      let r = {style:key, qty:rvalue};
      rows.push(r);        
    }
    await set_to_input(rows);    
}

async function input_select(o,styles)
{
    for(let i in o.files)
    {
      if(o.files[i].type === 'text/csv')
      {
        log.info("...load csv");            
        const rows = await csv_file_reader(o.files[i],styles);
        const v = await validate_rows(rows, styles);
        await set_to_input(v);          
      }

else if(o.files[i].type === 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' || o.files[i].type === 'application/vnd.ms-excel')
      {
        log.info("...load xlsx file");
        const rows = await xlsx_file_reader(o.files[i],styles);
        const v = await validate_rows(rows, styles);
        await set_to_input(v);
      }
    }
}

async function xlsx_file_reader(file, styles)
{
  let rows = [];
  const workbook = XLSX.read(await file.arrayBuffer(), {type: 'binary'});
  for(let i in workbook.Sheets)
  {
    row = XLSX.utils.sheet_to_json(workbook.Sheets[i],{raw:true,header:1});
    rows = rows.concat(row);
  }
  return rows;
}

async function csv_file_reader(file, styles)
{
  let rows = [];    
  const str = await file.text();
  const lines = str.split(/[\r\n]+/);
  for(let i in lines)
  {
    let row = lines[i].split(/\s*,\s*/).map(x => (x === '') ? '' : (isNaN(Number(x)) ? x : Number(x)) )
    rows.push(row);            
  }
  return rows;
}

async function validate_rows(rows, styles)
{
    let result =[]    
    if(rows.length <=0 )
    {
      return result;
    }

for(let r in rows)
    {
      for(let c in rows[r])
      {
            let cell = rows[r][c];
            if(typeof(cell) == 'string')
            {
                cell = cell.replace("__","/");
            }

if(styles.includes(cell))
            {
                let n = parseInt(c) +1;
                let qty = rows[r][n];
                if (qty === parseInt(qty, 10) )
                {
                    result.push({style:cell,qty:qty});
                }
                else{
                  let n2 = parseInt(c) +2;                
                  let qty2 = rows[r][n2];
                  if (qty2 === parseInt(qty2, 10) )
                  {
                    result.push({style:cell,qty:qty2});
                  }                    
            }

}
        }

}
   return result;
}

async function set_to_input(r)
{
      for(let i in r)
      {
        const keys = Object.keys(r[i]);
        for(let k in keys)
        {
          let e = document.querySelector('#'+keys[k]) || false
          if(e)
          {
            if (e.tagName === 'TEXTAREA' && e.type === 'textarea')
            {
                e.value = e.value.trim() + "\n" + r[i][keys[k]];
            }
          }
                  
        }
      }

}

https://www.npmjs.com/package/xlsx

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Example to fill textarea with excel and csv files27.04.23

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