How to achieve inversion of control in a front controller pattern?
I'm stuck at making dependency injection between controllers-services, services-database, I feel like it's a mess.
All the requests are redirected to index.php from public_html, in there
In index.php from public_html, I'm creating an app object, serving it a router and set up some routes like:
$app = new Application(new Router());
$app->addRoute('/questions', (Object)[
'controller' => 'QuestionsController',
'action' => 'getAllQuestions'
]);
I'm matching the URI against regex routes and instantiating the controller somehow "dynamically" depending on the route inside Application.php which maps to a controller and an action:
if(class_exists($this->controllerNamespace)){
$this->router->setController(new $this->controllerNamespace);
call_user_func_array([$this->router->getController(), $this->router->getAction()], [$this->router->getParams()]);
}
Inside the controller, I would instantiate a Service object and call a method on the service to retrieve db results.
The service in turn needs a database object in order to interact with the database and my database class is something like a singleton I suppose:
static function getInstance():Database
{
if (NULL == self::$database) {
self::$database = new Database();
}
return self::$database;
}
so I wouldn't know what service the controller needs until I'm actually inside the controller and the database instantiated inside the service class just seems wrong, how can I improve the whole thing?
My preference is without other libs for a dependency injection controller or other stuff that makes it easy, I'm writing this as a learning exercise to understand it better.
app
src
Controllers
Questions
Answers
Core
Controller
Database
Router
Service
View
Services
Questions
Answers
Views
index.php
Application.php
Config.php
tests
vendor
logs
public_html
assets
index.php
.htaccess
php dependency-injection
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
add a comment |
I'm stuck at making dependency injection between controllers-services, services-database, I feel like it's a mess.
All the requests are redirected to index.php from public_html, in there
In index.php from public_html, I'm creating an app object, serving it a router and set up some routes like:
$app = new Application(new Router());
$app->addRoute('/questions', (Object)[
'controller' => 'QuestionsController',
'action' => 'getAllQuestions'
]);
I'm matching the URI against regex routes and instantiating the controller somehow "dynamically" depending on the route inside Application.php which maps to a controller and an action:
if(class_exists($this->controllerNamespace)){
$this->router->setController(new $this->controllerNamespace);
call_user_func_array([$this->router->getController(), $this->router->getAction()], [$this->router->getParams()]);
}
Inside the controller, I would instantiate a Service object and call a method on the service to retrieve db results.
The service in turn needs a database object in order to interact with the database and my database class is something like a singleton I suppose:
static function getInstance():Database
{
if (NULL == self::$database) {
self::$database = new Database();
}
return self::$database;
}
so I wouldn't know what service the controller needs until I'm actually inside the controller and the database instantiated inside the service class just seems wrong, how can I improve the whole thing?
My preference is without other libs for a dependency injection controller or other stuff that makes it easy, I'm writing this as a learning exercise to understand it better.
app
src
Controllers
Questions
Answers
Core
Controller
Database
Router
Service
View
Services
Questions
Answers
Views
index.php
Application.php
Config.php
tests
vendor
logs
public_html
assets
index.php
.htaccess
php dependency-injection
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
add a comment |
I'm stuck at making dependency injection between controllers-services, services-database, I feel like it's a mess.
All the requests are redirected to index.php from public_html, in there
In index.php from public_html, I'm creating an app object, serving it a router and set up some routes like:
$app = new Application(new Router());
$app->addRoute('/questions', (Object)[
'controller' => 'QuestionsController',
'action' => 'getAllQuestions'
]);
I'm matching the URI against regex routes and instantiating the controller somehow "dynamically" depending on the route inside Application.php which maps to a controller and an action:
if(class_exists($this->controllerNamespace)){
$this->router->setController(new $this->controllerNamespace);
call_user_func_array([$this->router->getController(), $this->router->getAction()], [$this->router->getParams()]);
}
Inside the controller, I would instantiate a Service object and call a method on the service to retrieve db results.
The service in turn needs a database object in order to interact with the database and my database class is something like a singleton I suppose:
static function getInstance():Database
{
if (NULL == self::$database) {
self::$database = new Database();
}
return self::$database;
}
so I wouldn't know what service the controller needs until I'm actually inside the controller and the database instantiated inside the service class just seems wrong, how can I improve the whole thing?
My preference is without other libs for a dependency injection controller or other stuff that makes it easy, I'm writing this as a learning exercise to understand it better.
app
src
Controllers
Questions
Answers
Core
Controller
Database
Router
Service
View
Services
Questions
Answers
Views
index.php
Application.php
Config.php
tests
vendor
logs
public_html
assets
index.php
.htaccess
php dependency-injection
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
I'm stuck at making dependency injection between controllers-services, services-database, I feel like it's a mess.
All the requests are redirected to index.php from public_html, in there
In index.php from public_html, I'm creating an app object, serving it a router and set up some routes like:
$app = new Application(new Router());
$app->addRoute('/questions', (Object)[
'controller' => 'QuestionsController',
'action' => 'getAllQuestions'
]);
I'm matching the URI against regex routes and instantiating the controller somehow "dynamically" depending on the route inside Application.php which maps to a controller and an action:
if(class_exists($this->controllerNamespace)){
$this->router->setController(new $this->controllerNamespace);
call_user_func_array([$this->router->getController(), $this->router->getAction()], [$this->router->getParams()]);
}
Inside the controller, I would instantiate a Service object and call a method on the service to retrieve db results.
The service in turn needs a database object in order to interact with the database and my database class is something like a singleton I suppose:
static function getInstance():Database
{
if (NULL == self::$database) {
self::$database = new Database();
}
return self::$database;
}
so I wouldn't know what service the controller needs until I'm actually inside the controller and the database instantiated inside the service class just seems wrong, how can I improve the whole thing?
My preference is without other libs for a dependency injection controller or other stuff that makes it easy, I'm writing this as a learning exercise to understand it better.
app
src
Controllers
Questions
Answers
Core
Controller
Database
Router
Service
View
Services
Questions
Answers
Views
index.php
Application.php
Config.php
tests
vendor
logs
public_html
assets
index.php
.htaccess
php dependency-injection
php dependency-injection
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
asked Nov 20 '18 at 1:24
mrwhitemrwhite
5810
5810
add a comment |
add a comment |
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