index.js

module.exports = function(app){
  "use strict";

  if(app && app instanceof Function){
    var extension = {
      group: function(options, cb){
        options = options || {};
        if(options.prefix && typeof options.prefix == "string"){
          cb(function route(o){
            if(!o.url || typeof o.url !== "string"){
              console.log("Group requires that the route url is a string.");
              process.exit(1);
            }
            var route = options.prefix + o.url;
            if((o.method instanceof Array) && (o.callback instanceof Array)){
              if(o.method.length === o.callback.length){
                var len = o.method.length;
                for(var i = 0; i < len; i++){
                  if(!o.callback[i] instanceof Function){
                    console.log("route requires that the callback is a Function");
                    process.exit(1);
                  }
                  var method = o.method[i];
                  var callback = o.callback[i];
                  if(options.middleware && options.middleware instanceof Function){
                    app[method](route, options.middleware, callback);
                  }else{
                    app[method](route, callback);
                  }
                }
              }
            }else{
              if(!o.callback || !o.callback instanceof Function){
                console.log("Group requires that the middleware is a Function");
                process.exit(1);
              }
              var method = o.method || "get";
              var callback = o.callback;
              if(options.middleware && options.middleware instanceof Function){
                app[method](route, options.middleware, callback);
              }else{
                app[method](route, callback);
              }
            }
          });
        }  
      }
    }
    return extension;
  }else{
    console.log("ExpressGroup requires that you pass in your instanciated express application");
    console.log("var app = express();");
    console.log("_.extend(app, require('expressgroup')(app));");
    process.exit(1);
  }
}