How to make directive use the controller specified in directive attribute? - angularjs

Question

So I have a directive:
<directive data="user" templateUrl="./user.html" controller="UserController"></directive>
I want that directive to use the controller specified in "controller" attribute, as you see above.
Is it possible with AngularJS directives? Or should I do it other way, maybe with components?
My code currently looks like this:
app.directive('directive', function() {
var controllerName = "UserController"; // i want that to dynamicaly come from attribute
// check if controller extists:
var services = [];
app['_invokeQueue'].forEach(function(value){
services[value[2][0]] = true;
});
if (!services[controllerName]) controllerName = false;
return {
scope: { 'data' : '=' },
link: function (scope) {
Object.assign(scope, scope.data);
},
templateUrl: function(element, attr) {
return attr.templateurl;
},
controller: controllerName
}
});

Answer 1

You can do following (not exactly what you ask - it creates bunch of nested scopes, but should be sufficient):
.directive('directive', () => {
scope: { 'data' : '=' },
template: (elem, attrs) => {
return '<div ng-controller="' + attrs.controller + ' as vm"><div ng-include="' + attrs.template + '"></div></div>';
}
});
<directive data="user" templateUrl="./user.html" controller="UserController"></directive>
you may use $templateCache directly instead of ng-include
if you need controller/template/... to be dynamic, you need to observe/watch + dom manipulation + recompile stuff

Answer 2

Okay, so after analysing Petr's answer I post the working code using nested divs:
app.directive('directive', function() {
return {
scope: { 'data' : '=' },
link: function (scope) {
// this makes your fields available as {{name}} instead of {{user.name}}:
Object.assign(scope, scope.data);
},
template: function(element, attrs) {
var controllerName = attrs.controller;
var controllerString = controllerName + ' as vm';
// check if controller extists:
var services = [];
app['_invokeQueue'].forEach(function(value){
services[value[2][0]] = true;
})
if (!services[controllerName]) {
return '<div ng-include="\'' + attrs.templateurl + '\'"></div>';
} else {
return '<div ng-controller="' + controllerString + '"><div ng-include="\'' + attrs.templateurl + '\'"></div></div>';
}
}
}
});