alphascript-server/lib/db/entity.js

CRUD operations for mongo and other functionalities to get started quickly in any CMS project

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

module.exports = {
  redirectToDriver: function(entity, action) {
    return function(req, res, next) {
      req.entity = api.entityMap[entity];
      req.entityName = entity;
      req.entityAction = action;

      if (typeof req.entity === 'undefined') return next("entity not in map: " + entity);
      if (typeof req.entity.driver === 'undefined') req.entity.driver = "mongo";

      var middlewares = typeof req.entity.middleware === 'undefined' ? [] : (req.entity.middleware instanceof Array ? req.entity.middleware : [req.entity.middleware]);
      runMiddleware(middlewares, req, res, function(err) {
        if (err) return next(err);

        switch (req.entity.driver) {
          case "sql":
          case "mongo":
            try {
              var route = require('./' + req.entity.driver + '/entity');
              if (typeof route[action] !== 'function') return next("entity action not implemented " + action + " for driver " + req.entity.driver);
              return route[action](req, res);
            } catch (e) {
              api.error.log(e);
              return next("an error occurred during entity." + action + " for driver: " + req.entity.driver);
            }
            break;

          default:
            return next("unknown database driver: " + req.entity.driver);
        }
      });
    };
  }
};

function runMiddleware(middlewares, req, res, callback) {
  if (middlewares.length === 0) return callback();
  var middleware = middlewares[0];
  middlewares.splice(0, 1);

  middleware(req, res, function(err) {
    if (err) return callback(err);
    runMiddleware(middlewares, req, res, callback);
  });
}