index.js

const request = require('request');
const async = require('async');
const _ = require('lodash');

const URL_API = 'http://52.27.140.147:9099/maze';

function getMaze(mazeDefinition, solveCallback) {
  let width = mazeDefinition.width;
  let height = mazeDefinition.height;
  let id = mazeDefinition.id;

  let requests = _.flatMap(_.range(width), w => _.range(height).map(h => {
    let coords = {
      'x': w,
      'y': h,
      'id': id
    };
    return coords;
  }));

  console.log('about to spam server');

  async.map(requests, getMazePositionInfo, function (err, results) {
    console.log('got results');
    console.log('width: ' + width);
    console.log('height: ' + height);
    console.log('results size: ' + results.length);
    let maze = reformatResults(width, height, requests, results);
    console.log(maze);
  });
}

function getMazePositionInfo(item, callback) {
  let urlPosition = URL_API + '/' + item.id + '/check';
  request({
    url: urlPosition,
    qs: item
  }, function (err, resp, body) {
    console.log(body);
    if (err) {
      getMazePositionInfo(item, callback);
    } else {
      if (body.toLowerCase().includes('invalid position')) {
        callback(false, 0);
      } else if (body.toLowerCase().includes('position')) {
        callback(false, 1);
      } else {
        getMazePositionInfo(item, callback);
      }
    }
  });
}

function reformatResults(width, height, requests, results) {
  let maze = (function (width, height, init) {
    var arr = []
    for (var i = 0; i < height; i++) {
      arr[i] = [];
      for (var j = 0; j < width; j++) {
        arr[i][j] = init;
      }
    }
    return arr;
  })(width, height, -1);

  for (var i = 0; i < requests.length; i++) {
    maze[requests[i].x][requests[i].y] = results[i];
  }

  return maze;
}

request.post(URL_API, function (err, resp, body) {
  if (resp.statusCode == 201) {
    getMaze(JSON.parse(body));
  } else {
    console.err('you got fucked');
  }
});