freeCodeCamp/controllers/bonfire.js

var _ = require('lodash'),
  debug = require('debug')('freecc:cntr:bonfires'),
  Bonfire = require('./../models/Bonfire'),
  User = require('./../models/User'),
  resources = require('./resources'),
  R = require('ramda');
  MDNlinks = require('./../seed_data/bonfireMDNlinks');

/**
 * Bonfire controller
 */

exports.showAllBonfires = function(req, res) {
  var completedBonfires = [];
  if(req.user) {
      completedBonfires = req.user.completedBonfires.map(function (elem) {
          return elem._id;
      });
  }
  var noDuplicateBonfires = R.uniq(completedBonfires);
  var data = {};
  data.bonfireList = resources.allBonfireNames();
  data.completedList = noDuplicateBonfires;
  res.send(data);
};

exports.index = function(req, res) {
  res.render('bonfire/show.jade', {
    completedWith: null,
    title: 'Bonfire Playground',
    name: 'Bonfire Playground',
    difficulty: 0,
    brief: 'Feel free to play around!',
    details: '',
    tests: [],
    challengeSeed: '',
    cc: req.user ? req.user.bonfiresHash : undefined,
    progressTimestamps: req.user ? req.user.progressTimestamps : undefined,
    verb: resources.randomVerb(),
    phrase: resources.randomPhrase(),
    compliments: resources.randomCompliment(),
    bonfires: [],
    bonfireHash: 'test'

  });
};

exports.returnNextBonfire = function(req, res, next) {
  if (!req.user) {
    return res.redirect('../bonfires/meet-bonfire');
  }
  var completed = req.user.completedBonfires.map(function (elem) {
    return elem._id;
  });

  req.user.uncompletedBonfires = resources.allBonfireIds().filter(function (elem) {
    if (completed.indexOf(elem) === -1) {
      return elem;
    }
  });
  req.user.save();

  var uncompletedBonfires = req.user.uncompletedBonfires;

  var displayedBonfires =  Bonfire.find({'_id': uncompletedBonfires[0]});
  displayedBonfires.exec(function(err, bonfireFromMongo) {
    if (err) {
      return next(err);
    }
    var bonfire = bonfireFromMongo.pop();
    if (typeof bonfire === 'undefined') {
      req.flash('errors', {
        msg: "It looks like you've completed all the bonfires we have available. Good job!"
      });
      return res.redirect('../bonfires/meet-bonfire');
    }
    var nameString = bonfire.name.toLowerCase().replace(/\s/g, '-');
    return res.redirect('../bonfires/' + nameString);
  });
};

exports.returnIndividualBonfire = function(req, res, next) {
  var dashedName = req.params.bonfireName;

  var bonfireName = dashedName.replace(/\-/g, ' ');

  Bonfire.find({'name': new RegExp(bonfireName, 'i')}, function(err, bonfireFromMongo) {
    if (err) {
      next(err);
    }


    if (bonfireFromMongo.length < 1) {
      req.flash('errors', {
        msg: "404: We couldn't find a bonfire with that name. Please double check the name."
      });

      return res.redirect('/bonfires');
    }

    var bonfire = bonfireFromMongo.pop();
    var dashedNameFull = bonfire.name.toLowerCase().replace(/\s/g, '-');
    if (dashedNameFull !== dashedName) {
      return res.redirect('../bonfires/' + dashedNameFull);
    }
    res.render('bonfire/show', {
        completedWith: null,
        title: bonfire.name,
        dashedName: dashedName,
        name: bonfire.name,
        difficulty: Math.floor(+bonfire.difficulty),
        brief: bonfire.description.shift(),
        details: bonfire.description,
        tests: bonfire.tests,
        challengeSeed: bonfire.challengeSeed,
        points: req.user ? req.user.points : undefined,
        verb: resources.randomVerb(),
        phrase: resources.randomPhrase(),
        compliment: resources.randomCompliment(),
        bonfires: bonfire,
        bonfireHash: bonfire._id,
        MDNkeys: bonfire.MDNlinks,
        MDNlinks: getMDNlinks(bonfire.MDNlinks)
    });
  });
};

/**
 * Bonfire Generator
 * @param req Request Object
 * @param res Response Object
 * @returns void
 */

exports.returnGenerator = function(req, res) {
  res.render('bonfire/generator', {
    title: null,
    name: null,
    difficulty: null,
    brief: null,
    details: null,
    tests: null,
    challengeSeed: null,
    bonfireHash: randomString()
  });
};

/**
 * Post for bonfire generation
 */

function randomString() {
  var chars = '0123456789abcdef';
  var string_length = 23;
  var randomstring = 'a';
  for (var i = 0; i < string_length; i++) {
    var rnum = Math.floor(Math.random() * chars.length);
    randomstring += chars.substring(rnum, rnum + 1);
  }
  return randomstring;
}

/**
 * Helper function to populate the MDN links array.
 */

function getMDNlinks(links) {
  // takes in an array of links, which are strings
  var populatedLinks = [];

  // for each key value, push the corresponding link from the MDNlinks object into a new array
  links.forEach(function(value, index) {
    populatedLinks.push(MDNlinks[value]);
  });

  return populatedLinks;

}

/**
 *
 */

exports.testBonfire = function(req, res) {
  var bonfireName = req.body.name,
    bonfireTests = req.body.tests,
    bonfireDifficulty = req.body.difficulty,
    bonfireDescription = req.body.description,
    bonfireChallengeSeed = req.body.challengeSeed;
    bonfireTests = bonfireTests.split('\r\n');
    bonfireDescription = bonfireDescription.split('\r\n');
    bonfireTests.filter(getRidOfEmpties);
    bonfireDescription.filter(getRidOfEmpties);
    bonfireChallengeSeed = bonfireChallengeSeed.replace('\r', '');

  res.render('bonfire/show', {
    completedWith: null,
    title: bonfireName,
    name: bonfireName,
    difficulty: +bonfireDifficulty,
    brief: bonfireDescription[0],
    details: bonfireDescription.slice(1),
    tests: bonfireTests,
    challengeSeed: bonfireChallengeSeed,
    cc: req.user ? req.user.bonfiresHash : undefined,
    progressTimestamps: req.user ? req.user.progressTimestamps : undefined,
    verb: resources.randomVerb(),
    phrase: resources.randomPhrase(),
    compliment: resources.randomCompliment(),
    bonfires: [],
    bonfireHash: 'test'
  });
};

function getRidOfEmpties(elem) {
  if (elem.length > 0) {
    return elem;
  }
}

exports.publicGenerator = function(req, res) {
  res.render('bonfire/public-generator');
};

exports.generateChallenge = function(req, res) {
  var bonfireName = req.body.name,
    bonfireTests = req.body.tests,
    bonfireDifficulty = req.body.difficulty,
    bonfireDescription = req.body.description,
    bonfireChallengeSeed = req.body.challengeSeed;
    bonfireTests = bonfireTests.split('\r\n');
    bonfireDescription = bonfireDescription.split('\r\n');
    bonfireTests.filter(getRidOfEmpties);
    bonfireDescription.filter(getRidOfEmpties);
    bonfireChallengeSeed = bonfireChallengeSeed.replace('\r', '');


  var response = {
    _id: randomString(),
    name: bonfireName,
    difficulty: bonfireDifficulty,
    description: bonfireDescription,
    challengeSeed: bonfireChallengeSeed,
    tests: bonfireTests
  };
  res.send(response);
};

exports.completedBonfire = function (req, res, next) {
  var isCompletedWith = req.body.bonfireInfo.completedWith || '';
  var isCompletedDate = Math.round(+new Date());
  var bonfireHash = req.body.bonfireInfo.bonfireHash;
  var isSolution = req.body.bonfireInfo.solution;
  var bonfireName = req.body.bonfireInfo.bonfireName;

  if (isCompletedWith) {
    var paired = User.find({'profile.username': isCompletedWith
      .toLowerCase()}).limit(1);
    paired.exec(function (err, pairedWith) {
      if (err) {
        return next(err);
      } else {
        var index = req.user.uncompletedBonfires.indexOf(bonfireHash);
        if (index > -1) {
          req.user.progressTimestamps.push(Date.now() || 0);
          req.user.uncompletedBonfires.splice(index, 1);
        }
        pairedWith = pairedWith.pop();

        index = pairedWith.uncompletedBonfires.indexOf(bonfireHash);
        if (index > -1) {
          pairedWith.progressTimestamps.push(Date.now() || 0);
          pairedWith.uncompletedBonfires.splice(index, 1);

        }

        pairedWith.completedBonfires.push({
          _id: bonfireHash,
          name: bonfireName,
          completedWith: req.user._id,
          completedDate: isCompletedDate,
          solution: isSolution
        });

        req.user.completedBonfires.push({
          _id: bonfireHash,
          name: bonfireName,
          completedWith: pairedWith._id,
          completedDate: isCompletedDate,
          solution: isSolution
        });

        req.user.save(function (err, user) {
          if (err) {
            return next(err);
          }
          pairedWith.save(function (err, paired) {
            if (err) {
              return next(err);
            }
            if (user && paired) {
              res.send(true);
            }
          });
        });
      }
    });
  } else {
    req.user.completedBonfires.push({
      _id: bonfireHash,
      name: bonfireName,
      completedWith: null,
      completedDate: isCompletedDate,
      solution: isSolution
    });

    var index = req.user.uncompletedBonfires.indexOf(bonfireHash);
    if (index > -1) {

      req.user.progressTimestamps.push(Date.now() || 0);
      req.user.uncompletedBonfires.splice(index, 1);
    }

    req.user.save(function (err, user) {
      if (err) {
        return next(err);
      }
      if (user) {
        res.send(true);
      }
    });
  }
};