stats.js

/* stats.js */

/* script to read the log file and generate some stats to detect how much work
 * was done in the codio box and how much pasted in.
*/

// $ > ~/stats.js
// nano ~/stats.js
// $ deno run --allow-read ../stats.js

import { parse } from "https://deno.land/std@0.82.0/encoding/csv.ts";
import { blue, green, red, yellow } from "https://deno.land/std/fmt/colors.ts";
const threshold = 3000; // flags up 3K changes
const barChar = "#";
const records = await parse(await Deno.readTextFile("/home/codio/log.csv"));

let current = 0;
let count = 0;
let changes = 0;
let first = records[0];
let last = records[records.length - 1];
console.log(); //insert a blank line for readability
for (const record of records) {
  const [timestamp, date, time, size] = record;
  if (current < 1000) current = size; // sets the base size of the code
  if (size !== current) {
    changes++;
    const diff = Math.abs(size - current);
    if (diff > 9000 && size > current) { // perhaps the box was reset?
      console.log(
        blue(`BOX RESET: ${date2ukdate(date)} ${time.substring(0, 5)}`),
      );
      console.log();
    }
    if (diff > threshold && diff < 9000) { // ignore if project reset
      const hrMin = time.substring(0, 5); // remove the seconds
      let type = size > current ? "ADDED" : "DELETED";
      const barLen = Math.ceil(diff / 500); // one block per 500 byte change
      const msg = `${date2ukdate(date)} at ${hrMin} ${
        (diff / 1000).toFixed(1)
      } Kb ${type}`;
      if (type === "ADDED") {
        console.log(green(msg));
      } else {
        console.log(red(msg));
      }
      for (let i = 0; i < barLen; i++) {
        await Deno.stdout.write(new TextEncoder().encode(barChar));
      }
      console.log();
      console.log();
    }
    count++;
    current = size;
  }
}

console.log(); //insert a blank line for readability
console.log("STUDENT ENGAGEMENT SUMMARY");
console.log(`assignment started: ${date2ukdate(first[1])}`);
console.log(`last edit made on ${date2ukdate(last[1])} at ${last[2]}`);
console.log(`Codio box open for ${Math.ceil(records.length * 5 / 60)} hrs`);
console.log(
  `student actively engaged on assignment for ${
    (count * 5 / 60).toFixed(1)
  } hrs`,
);
console.log(
  `engagement score (higher is better): ${
    Math.floor(count / records.length * 100)
  }`,
);
console.log(`changes: ${changes}`);
const changeRate = parseInt(changes / records.length * 100)
console.log(`change rate: ${changeRate}`);

function date2ukdate(date) {
  const [month, day, year] = date.split("/");
  return `${day}/${month}/${year}`;
}