multi-tenancy.js

var z = (function (){
  //helpers
  var cache = {};
  var target;
  var type = {}.toString;
  var tenant=function(componentName, component) {     
      return {
        controller: component.controller,
        view: function(ctrl) {
          var args=[];
          if (arguments.length > 1) args = args.concat([].slice.call(arguments, 1))
          if((type.call(target) === '[object Array]' &&  target.indexOf(componentName) > -1) ||  target === componentName ||  target === "all")
            return component.view.apply(component, args.length ? [ctrl].concat(args) : [ctrl])
          else
            return {subtree: "retain"}
        }
      }
  }
  return {      
    withTarget:function(components, callback) {
      return function(e) {
        target = components;
        callback.call(this, e)
      }
    },    
    component:function(componentName,component){
      target = componentName;
      var args=[];
      if (arguments.length > 2) args = args.concat([].slice.call(arguments, 2))
      return m.component.apply(undefined,[tenant(componentName,component)].concat(args));
    },  
    setTarget:function(targets){
      target = targets;
    },
    bindOnce:function(componentName,viewName,view) {
      if(cache[componentName] === undefined) {
        cache[componentName] = {};
      }
      if (cache[componentName][viewName] === undefined) {
          cache[componentName][viewName] = true
          return view()
      }
      else return {subtree: "retain"}
    },
    removeCache:function(componentName){
      delete cache[componentName]
    }
  }
})();