processRawDirectionDiscriminationData

/*This script is to extract a single wave/attempt from a direction discrimination trial. Have this file
in the same folder level as the raw files to be processed, and craate a folder named "cleaned". All 
the processed data will be in the cleaned folder. Use "node processRawDirectionDiscriminationData.js" to run, must have node installed first.*/
 
const fs = require('fs')

const dir = fs.opendirSync('.')
let dirent;
let count = 0;
async function readFiles() {
  while ((dirent = dir.readSync()) !== null) {
  const { name } = dirent;
  if (name.includes("DirectionDiscrimination")) {
  fs.readFile(name, 'utf8', function(err, data){ 
    // Display the file content 
    let output = 'Timestamp, Fx, Fy, Fz, Magnitude\r';
    //console.log("---------------------------------------------------------------------------------------------------------")
    data = data.split("\n");
    count += 1;
    console.log(data.length);
    let curIndex = data.length - 2;
    let cutOffFound = false;
    let highPointFound = false;
    let beginningIdx = 0;
    while (!cutOffFound && curIndex > -1) {
     // data[curIndex] = data[curIndex].split(",");
      let row =  data[curIndex].split(",");
      let mag = row[4];
      if (mag >= 1) {
        highPointFound = true;
      } else if (highPointFound && mag <= 0.2) {
        cutOffFound = true;
        beginningIdx = curIndex;
      }
      if (data[curIndex][4]){
        let mag = data[curIndex][4];
        data[curIndex][4] = mag.substring(0, mag.length - 3);
      }
      curIndex -= 1
    }

    beginningIdx = beginningIdx == 0 ? 1 : beginningIdx;
    data = data.slice(beginningIdx);
    data = splitToArrays(data);
    let timeoffset = data[0][0];
    for (let j = 0; j < data.length - 1; j++) {
      let newTime = data[j][0] - timeoffset;
      data[j][0] = newTime;
      output += data[j].join(",");
    }

    fs.writeFile('./cleaned/Clean-' + name , output, (err) => { 
      // In case of a error throw err. 
      if (err) throw err; 
    }) 
  }); 
  }
  }
dir.closeSync()
}

function splitToArrays(data) {
  for (let i = 0; i < data.length; i++){
    if (data[i] != "" || data[i] != null) {
    let row = data[i].split(",");
    data[i] = row;
    }
  }
  return data;
}


readFiles();