Utilize modes and application initialization

Author: simpleadm

2. Request Flow Processing/1. Utilize modes and application initialization.md

@@ -9,11 +9,11 @@
 
 - configure autoloader - PSR-4 prepend generation\Magento
 
-\Magento\Framework\App\Bootstrap::*createApplication*
+[\Magento\Framework\App\Bootstrap](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Bootstrap.php)::*createApplication*
 
 - just call object manager->create
 
-\Magento\Framework\App\Bootstrap::*run*
+[\Magento\Framework\App\Bootstrap](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Bootstrap.php)::*run*
 
 - set error handler
 - assert maintenance
@@ -27,7 +27,7 @@
 
 ### Application class
 
-bootstrap->createApplication() 
+[bootstrap->createApplication()](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Bootstrap.php#L230) 
 
   - [\Magento\Framework\App\Http](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Http.php) - index.php, pub/index.php
     load config area by front name
@@ -64,19 +64,26 @@ Notes:
 [\Magento\Framework\App\Http::launch](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Http.php#L128)
 1. detect config area by front name
 
-`\Magento\Framework\App\AreaList` - areas from argument di.xml
+```php
+<?php
+$areaCode = $this->_areaList->getCodeByFrontName($this->_request->getFrontName());
+$this->_state->setAreaCode($areaCode);
+$this->_objectManager->configure($this->_configLoader->load($areaCode));
+```
+
+`\Magento\Framework\App\AreaList` - areas from argument di.xml ([AreaList](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/AreaList.php))
 
 - frontend = [frontname null, router "standard"] --- *default when nothing matched*
 - adminhtml - [frontNameResolver=..., router "admin"]
-  \Magento\Backend\App\Area\FrontNameResolver::getFrontName(checkhost)
+  [\Magento\Backend\App\Area\FrontNameResolver::getFrontName(checkhost)](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Backend/App/Area/FrontNameResolver.php#L83)
   system config `admin/url/use_custom`, `admin/url/custom`
 - crontab = null
 - webapi_rest = [frontName `/rest`]
 - webapi_soap = [frontname `/soap`]
 
-1. ObjectManagerInterface::configure - selected area code
-1. result = FrontControllerInterface->dispatch
-1. ResultInterface.renderResult into response object
+1. [ObjectManagerInterface->configure()](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/ObjectManager/ObjectManager.php#L82) - selected area code
+1. result = FrontControllerInterface->dispatch()
+1. [ResultInterface->renderResult()](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/AbstractResult.php#L122) into response object
 1. event `controller_front_send_response_before` (request, response)
 
 
@@ -95,7 +102,7 @@ Notes:
 - "webapi_rest (frontName `/rest`) - preference module-webapi/etc/webapi_rest/di.xml - *\Magento\Webapi\Controller\Rest*
 - "webapi_soap" (frontname `/soap`) - preference module-webapi/etc/webapi_rest/di.xml - *\Magento\Webapi\Controller\Soap*
 
-### [App\FrontController](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/FrontController.php):
+### [\Magento\Framework\App\FrontController](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/FrontController.php):
 
 - routerList
 - action = router[].match
@@ -111,17 +118,32 @@ Notes:
 
 - [\Magento\Framework\Controller\ResultInterface](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/ResultInterface.php) - renderResult, setHttpResponseCode, setHeader
 
-  Raw, Json, Forward, Layout, Page, Redirect
+    Implementations:
+    - [Result\Raw](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/Result/Raw.php) -> Result\AbstractResult
+    - [Result\Json](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/Result/Json.php) -> Result\AbstractResult
+    - [Result\Forward](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/Result/Forward.php) -> Result\AbstractResult
+    - [\Magento\Framework\View\Result\Layout](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/View/Result/Layout.php) -> Result\AbstractResult
+    - [\Magento\Framework\View\Result\Page](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/View/Result/Page.php) -> \Magento\Framework\View\Result\Layout
+    - [Controller\Result\Redirect](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Controller/Result/Redirect.php) -> Result\AbstractResult
+
+- [\Magento\Framework\App\ResponseInterface](https://github.com/magento/magento2/blob/2.2-develop/lib/internal//Magento/Framework/App/ResponseInterface.php) - sendResponse
 
-- \Magento\Framework\App\ResponseInterface - sendResponse
-  Console\Response, Response\FileInterface, PhpEnvironment\Response, Webapi\Response, Rest\Response
+    Implementations:
+    - [Console\Response](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Console/Response.php)
+    - [\Magento\MediaStorage\Model\File\Storage\FileInterface](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/MediaStorage/Model/File/Storage/Response.php) -> \Magento\Framework\App\Response\Http
+    - [\Magento\Framework\HTTP\PhpEnvironment\Response](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/HTTP/PhpEnvironment/Response.php) -> \Zend\Http\PhpEnvironment\Response
+    - [\Magento\Framework\Webapi\Response](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Webapi/Response.php) -> \Magento\Framework\HTTP\PhpEnvironment\Response
+    - [\Magento\Framework\Webapi\Rest\Response](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/Webapi/Rest/Response.php) -> \Magento\Framework\Webapi\Response
 
-### [Controller\Rest](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Webapi/Controller/Rest.php):
-- process path [/$store]/... - specific store, [/all]/... - admin store, /... - default store
+### [\Magento\Webapi\Controller\Rest](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Webapi/Controller/Rest.php) -> \Magento\Framework\App\FrontControllerInterface:
+
+- preference for FrontController set in [etc/webapi_rest/di.xml](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Webapi/etc/webapi_rest/di.xml#L32)
+- process path [/$store]/... - specific store, [/all]/... - admin store (0), /... - default store
 - a. process schema request /schema
 - b. or process api request (resolve route, invoike route -> service class with params)
 
-### [Controller\Soap](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Webapi/Controller/Soap.php):
+### [\Magento\Webapi\Controller\Soap](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Webapi/Controller/Soap.php) -> \Magento\Framework\App\FrontControllerInterface:
+
 - process path (same as REST)
 - a. generate WSDL ?wsdl
 - b. or generate WSDL service list ?wsdl_list