@incdevco/framework/action/consumer/index.js

node.js lambda framework

var Promise = require('bluebird');

function Consumer(config) {
  
  config = config || {};
  
  this.handlers = config.handlers || {};
  
}

Consumer.prototype.consume = function (action, index, deleteMessageFn) {
  
  var self = this;
  
  return Promise.try(function () {
    
    var parts = action.name.split(':');
    
    var group = parts[0];
    
    var name = self.normalizeActionName(parts[1]);
    
    if (!self.handlers[group]) {
      
      throw new Error('Group Is Unknown: ' + group);
      
    }
    
    if (typeof self.handlers[group][name] !== 'function') {
      
      throw new Error('Handler Is Not Function: ' + group + '.' + name);
      
    }
    
    return self.handlers[group][name](action, index, deleteMessageFn);
    
  });
  
};

Consumer.prototype.normalizeActionName = function (input) {
  
  var normalized = '';
  
  input.split('-').forEach(function (part, index) {
    
    if (index > 0) {
      
      part = part.charAt(0).toUpperCase() + part.substr(1);
      
    }
    
    normalized += part;
    
  });
  
  return normalized;
  
};

module.exports = Consumer;