MFP Export.js

function extractData() {
  console.log("starting up...");
  if (window.location.hostname !== "www.myfitnesspal.com") {
    alert(
      "You be logged into www.myfitnesspal.com and have the page open to export your information"
    );
    return;
  }

  if ($("#csv").length == 0) {
    if ($("#main").length == 1){
      $("#main").prepend("<p id='csv'/>");    
    }
    else {
      $(".contents").prepend("<p id='csv'/>");    
    }     
  }

  console.log("running...");

  var csv = $("#csv");

  csv.html("Loading weight and calories...");
  csv.show("highlight", { color: "#f00" }, "slow");

  var calorieResponse = $.get(
    "https://www.myfitnesspal.com/reports/results/nutrition/calories/31.json"
  );

  var proteinResponse = $.get(
    "https://www.myfitnesspal.com/reports/results/nutrition/protein/31.json"
  );

  var fiberResponse = $.get(
    "https://www.myfitnesspal.com/reports/results/nutrition/fiber/31.json"
  );

  $.when(calorieResponse, proteinResponse, fiberResponse).done(function () {
    updateCsv(
      csv,
      JSON.parse(calorieResponse.responseText),
      JSON.parse(proteinResponse.responseText),
      JSON.parse(fiberResponse.responseText)
    );
  });
}

function updateCsv(csv, calorieResponse, proteinResponse, fiberResponse) {
 console.log("creating csv...");

  var output = "Date,Calories,Protein,Fiber\n";

  var caloriesArray = calorieResponse.data;
  var proteinArray = proteinResponse.data;
  var fiberArray = fiberResponse.data;

  var currentYear = new Date().getFullYear() - 1;

  for (var i = 0; i < caloriesArray.length; i++) {
    var c = caloriesArray[i];
    var p = proteinArray[i];
    var f = fiberArray[i];
    if (c.date == "1/01") currentYear++;
    output +=
      currentYear +
      "/" +
      c.date +
      "," +
      c.total +
      "," +
      p.total +
      "," +
      f.total +
      "\n";
  }

  csv.html(
    'Paste this into your spreadsheet: <textarea id="csvTextArea" cols="50" rows="50">' +
      output +
      "</textarea>"
  );
  
  csv.show("highlight", { color: "#f00" }, "slow");
  $("#csvTextArea").click(function () {
    $(this).select();
  });
console.log("all done...");  
}

extractData();