linagora/openpaas-esn

'use strict';

var mail = require('./mail');

module.exports = function(dependencies) {

  var lib = {};

  var emailTokenModel = require('../backend/db/models/email-recipient-token');
  var token = require('./token')(lib, dependencies);
  var sender = require('./sender')(lib, dependencies);
  var handlers = require('./handlers')(lib, dependencies);

  function validateTo(to, callback) {
    if (!to) {
      return callback(new Error('Address is required'));
    }
    return callback(null, true);
  }

  function getUser(from, callback) {
    var userModule = dependencies('user');
    if (!from) {
      return callback(new Error('User is required'));
    }
    return userModule.findByEmail(from, callback);
  }

  function loadMessage(messageId, callback) {
    if (!messageId) {
      return callback(new Error('Message Id is required'));
    }

    var messageModule = dependencies('message');
    return messageModule.get(messageId, callback);
  }

  function canReply(replyTo, user, callback) {

    if (!user) {
      return callback(new Error('User is required'));
    }

    if (!replyTo) {
      return callback(new Error('Message is required'));
    }

    var message = replyTo.message;

    var handler = handlers[message.objectType];
    if (!handler) {
      return callback(new Error('Can not get mail handler for %s message', message.objectType));
    }

    replyTo.objectType = handler.getReplyObjectType();

    loadMessage(message._id, function(err, m) {
      if (err) {
        return callback(err);
      }

      var messageModule = dependencies('message');
      messageModule.permission.canReply(m, user, function(err, result) {
        if (result) {
          return messageModule.typeSpecificReplyPermission(m, user, replyTo, callback);
        }
        return callback(null, false);
      });
    });
  }

  function getReplyTo(to, user, callback) {
    if (!to) {
      return callback(new Error('target is required'));
    }

    var targetMessage = to.split('@')[0];
    if (!targetMessage) {
      return callback(new Error('Can not get the replyTo from the target email'));
    }

    token.getToken(targetMessage, function(err, token) {
      if (err) {
        return callback(err);
      }

      if (!token) {
        return callback(new Error('Token not found'));
      }

      if (!token.user.equals(user._id)) {
        return callback(new Error('Invalid user'));
      }

      var response = {
        message: {
          objectType: token.message.objectType,
          _id: token.message.id
        }
      };

      if (token.data) {
        response.data = token.data;
      }

      return callback(null, response);
    });
  }

  function parseMessage(stream, author, callback) {
    return mail(dependencies).parse(stream, author, callback);
  }

  function reply(message, replyTo, user, callback) {
    var messageModule = dependencies('message');
    var helpersModule = dependencies('helpers');

    var inReplyTo = replyTo.message;
    var data = replyTo.data;

    var publishCommentActivity = function(parentMessage, childMessage) {
      helpersModule.message.publishCommentActivity(user, inReplyTo, parentMessage, childMessage);
    };

    if (!inReplyTo) {
      return callback(new Error('Missing inReplyTo'));
    }

    var handler = handlers[inReplyTo.objectType];
    if (!handler) {
      return callback(new Error('Can not get mail handler for %s message', inReplyTo.objectType));
    }

    var replyMessage = handler.generateReplyMessage(user, message, data);

    var comment;
    try {
      comment = messageModule.getInstance(inReplyTo.objectType, replyMessage);
    } catch (e) {
      return callback(e);
    }

    messageModule.addNewComment(comment, inReplyTo, function(err, childMessage, parentMessage) {
      if (err) {
        return callback(err);
      }

      if (message.attachments && message.attachments.length > 0) {
        return messageModule.setAttachmentsReferences(message, function() {
          publishCommentActivity(parentMessage, childMessage);
          return callback(null, { _id: childMessage._id, parentId: parentMessage._id});
        });
      } else {
        publishCommentActivity(parentMessage, childMessage);
        return callback(null, {_id: childMessage._id, parentId: parentMessage._id });
      }
    });
  }

  function getMessageURL(messageId, streamId, callback) {
    var esnConfig = dependencies('esn-config');
    var staticConfig = dependencies('config')('default');

    function done(baseUrl) {
      return callback(baseUrl + '/#/messages/' + messageId + '/activitystreams/' + streamId);
    }

    esnConfig('web').get(function(err, config) {
      if (config && config.base_url) {
        return done(config.base_url);
      }
      return done([
        'http://',
        staticConfig.webserver.host || staticConfig.webserver.ip || 'localhost',
        staticConfig.webserver.port && staticConfig.webserver.port !== 80 ? ':' : '',
        staticConfig.webserver.port && staticConfig.webserver.port !== 80 ? staticConfig.webserver.port : ''
      ].join(''));
    });
  }

  lib.getUser = getUser;
  lib.canReply = canReply;
  lib.parseMessage = parseMessage;
  lib.reply = reply;
  lib.getReplyTo = getReplyTo;
  lib.validateTo = validateTo;
  lib.emailTokenModel = emailTokenModel;
  lib.token = token;
  lib.handlers = handlers;
  lib.sender = sender;
  lib.getMessageURL = getMessageURL;

  return lib;
};