webapi-eca/js-coffee/user_handler.js

// Generated by CoffeeScript 1.6.3
/*

User Handler
============
> TODO Add documentation
*/


(function() {
  var answerHandler, db, exports, fAdminCommands, fs, log, mm, objAdminCmds, onAdminCommand, path, qs;

  fs = require('fs');

  path = require('path');

  qs = require('querystring');

  log = require('./logging');

  db = require('./db_interface');

  mm = require('./module_manager');

  /* Prepare the admin command handlers that are issued via HTTP requests.*/


  objAdminCmds = {
    'loadrules': mm.loadRulesFromFS,
    'loadaction': mm.loadActionModuleFromFS,
    'loadactions': mm.loadActionModulesFromFS,
    'loadevent': mm.loadEventModuleFromFS,
    'loadevents': mm.loadEventModulesFromFS
  };

  exports = module.exports = function(args) {
    var user, users, _i, _len;
    args = args != null ? args : {};
    log(args);
    db(args);
    mm(args);
    mm.addDBLink(db);
    users = JSON.parse(fs.readFileSync(path.resolve(__dirname, '..', 'config', 'users.json')));
    for (_i = 0, _len = users.length; _i < _len; _i++) {
      user = users[_i];
      db.storeUser(user);
    }
    return module.exports;
  };

  exports.addShutdownHandler = function(fShutdown) {
    return objAdminCmds.shutdown = fShutdown;
  };

  exports.handleRequest = function(req, resp) {
    req.on('end', function() {
      return resp.end();
    });
    if (req.session && req.session.user) {
      resp.send('You\'re logged in');
    } else {
      resp.sendfile(path.resolve(__dirname, '..', 'webpages', 'handlers', 'login.html'));
    }
    return req.session.lastPage = req.originalUrl;
  };

  exports.handleLogin = function(req, resp) {
    var body;
    body = '';
    req.on('data', function(data) {
      return body += data;
    });
    return req.on('end', function() {
      var obj;
      if (!req.session || !req.session.user) {
        obj = qs.parse(body);
        return db.loginUser(obj.username, obj.password, function(err, obj) {
          if (!err) {
            req.session.user = obj;
          }
          if (req.session.user) {
            resp.write('Welcome ' + req.session.user.name + '!');
          } else {
            resp.writeHead(401, {
              "Content-Type": "text/plain"
            });
            resp.write('Login failed!');
          }
          return resp.end();
        });
      } else {
        resp.write('Welcome ' + req.session.user.name + '!');
        return resp.end();
      }
    });
  };

  answerHandler = function(resp) {
    var hasBeenAnswered;
    hasBeenAnswered = false;
    postAnswer(msg)(function() {
      if (!hasBeenAnswered) {
        resp.write(msg);
        resp.end();
        return hasBeenAnswered = true;
      }
    });
    return {
      answerSuccess: function(msg) {
        if (!hasBeenAnswered) {
          return postAnswer(msg);
        }
      },
      answerError: function(msg) {
        if (!hasBeenAnswered) {
          resp.writeHead(400, {
            "Content-Type": "text/plain"
          });
        }
        return postAnswer(msg);
      },
      isAnswered: function() {
        return hasBeenAnswered;
      }
    };
  };

  onAdminCommand = function(req, response) {
    var q;
    q = req.query;
    log.print('HL', 'Received admin request: ' + req.originalUrl);
    if (q.cmd) {
      return fAdminCommands(q, answerHandler(response));
    } else {
      return answerError(response, 'I\'m not sure about what you want from me...');
    }
  };

  /*
  admin commands handler receives all command arguments and an answerHandler
  object that eases response handling to the HTTP request issuer.
  
  @private fAdminCommands( *args, answHandler* )
  */


  fAdminCommands = function(args, answHandler) {
    var fAnsw, _name;
    if (args && args.cmd) {
      if (typeof adminCmds[_name = args.cmd] === "function") {
        adminCmds[_name](args, answHandler);
      }
    } else {
      log.print('RS', 'No command in request');
    }
    /*
    The fAnsw function receives an answerHandler object as an argument when called
    and returns an anonymous function
    */

    fAnsw = function(ah) {
      /*
      The anonymous function checks whether the answerHandler was already used to
      issue an answer, if no answer was provided we answer with an error message
      */

      return function() {
        if (!ah.isAnswered()) {
          return ah.answerError('Not handled...');
        }
      };
    };
    /*
    Delayed function call of the anonymous function that checks the answer handler
    */

    return setTimeout(fAnsw(answHandler), 2000);
  };

}).call(this);