Scrape RYM Charts - 6-22-22

scraperym.js

function generateDownload(filename, text, type='text/plain;charset=utf-8') {
    // Create an invisible A element
    const a = document.createElement('a');
    a.style.display = 'none';
    document.body.appendChild(a);
  
    var BOM = new Uint8Array([0xEF,0xBB,0xBF]);

  
    // Set the HREF to a Blob representation of the data to be downloaded
    a.href = window.URL.createObjectURL(
      new Blob([BOM, text], { type })
    );
  
    // Use download attribute to set set desired file name
    a.setAttribute('download', filename);
  
    // Trigger the download by simulating click
    a.click();
  
    // Cleanup
    window.URL.revokeObjectURL(a.href);
    document.body.removeChild(a);
  }
  
  function startDownload() {
    const collection = document.getElementsByClassName('page_charts_section_charts_top_line');
    
    let origTitle = 'RYM Chart Download';
    
    let today = new Date().toISOString().replace(/T.*/,'');
    
    let lowerTitle = origTitle.toLowerCase();
    let title = lowerTitle.replace(/[^a-z0-9]/gi, '')+'-'+today+'.txt';
    
    var fullList = '';
    for (let i = 0; i < collection.length; i++) {
    
      artist = collection[i].getElementsByClassName('page_charts_section_charts_item_credited_links_primary')[0].innerText;
      album = collection[i].getElementsByClassName('page_charts_section_charts_item_title')[0].innerText;
      content = artist +' - '+ album
	

      fullList = fullList+content;
    
      if(i != parseInt(collection.length) - 1) {
        fullList=fullList+'\r\n';
      }
    
    }
    generateDownload(title, fullList);
  }