@incdevco/framework/lambda/email-hook/index.js

node.js lambda framework

var Util = require('util');

var Base = require('../index');
var MailParser = require('../../mail-parser');

function Lambda(config) {
  'use strict';
  
  Base.call(this, config);
  
  this.handlers = config.handlers || {};
  this.parser = new MailParser(config.parser);
  
}

Util.inherits(Lambda, Base);

Lambda.prototype.handleEmail = function (message, content) {
  'use strict';
  
  var promise = this.Promise.resolve(true), 
    self = this;
  
  message.mail.destination.forEach(function (destination) {
    
    if (self.handlers[destination]) {
        
      promise = promise.then(function () {
        
        return self.handlers[destination](message, content);
        
      });
        
    }
    
  });
  
  return promise;
  
};

Lambda.prototype.handler = function (event, context) {
  'use strict';
  
  var promise = this.Promise.resolve(true), 
    self = this;
    
  this.log('original-event', JSON.stringify(event, null, 2));
  
  event.Records.forEach(function (record) {
    
    promise = promise.then(function () {
      
      var message = JSON.parse(record.Sns.Message);
      
      return self.parser.parse(message.content)
      .then(function (content) {
        
        return self.handleEmail(message, content);
        
      });
      
    });
    
  });
  
  promise
  .then(function (result) {
    
    context.succeed(result);
    
  })
  .catch(function (exception) {
    
    context.fail(exception);
    
  });
  
};

Lambda.prototype.register = function (emailAddress, handler) {
  'use strict';
  
  this.handlers[emailAddress] = handler;
  
  return this;
  
};

module.exports = Lambda;