Moved models to folder, renamed managers to tools

Tools seems to fit better since the classes were a bit of a mixed bunch
and did not always manage.
Also simplified the structure of the SlugGenerator class.
Also focused EntityContext on shelves and simplified to use session
helper.

app/Http/Controllers/BookController.php

@@ -2,9 +2,9 @@
 
 use Activity;
 use BookStack\Actions\ActivityType;
-use BookStack\Entities\Managers\BookContents;
+use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Bookshelf;
-use BookStack\Entities\Managers\EntityContext;
+use BookStack\Entities\Tools\ShelfContext;
 use BookStack\Entities\Repos\BookRepo;
 use BookStack\Exceptions\ImageUploadException;
 use Illuminate\Http\Request;
@@ -18,7 +18,7 @@ class BookController extends Controller
     protected $bookRepo;
     protected $entityContextManager;
 
-    public function __construct(EntityContext $entityContextManager, BookRepo $bookRepo)
+    public function __construct(ShelfContext $entityContextManager, BookRepo $bookRepo)
     {
         $this->bookRepo = $bookRepo;
         $this->entityContextManager = $entityContextManager;

app/Http/Controllers/BookSortController.php

@@ -4,7 +4,7 @@ namespace BookStack\Http\Controllers;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Entities\Book;
-use BookStack\Entities\Managers\BookContents;
+use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Repos\BookRepo;
 use BookStack\Exceptions\SortOperationException;
 use BookStack\Facades\Activity;

app/Http/Controllers/BookshelfController.php

@@ -2,7 +2,7 @@
 
 use Activity;
 use BookStack\Entities\Book;
-use BookStack\Entities\Managers\EntityContext;
+use BookStack\Entities\Tools\ShelfContext;
 use BookStack\Entities\Repos\BookshelfRepo;
 use BookStack\Exceptions\ImageUploadException;
 use BookStack\Exceptions\NotFoundException;
@@ -22,7 +22,7 @@ class BookshelfController extends Controller
     /**
      * BookController constructor.
      */
-    public function __construct(BookshelfRepo $bookshelfRepo, EntityContext $entityContextManager, ImageRepo $imageRepo)
+    public function __construct(BookshelfRepo $bookshelfRepo, ShelfContext $entityContextManager, ImageRepo $imageRepo)
     {
         $this->bookshelfRepo = $bookshelfRepo;
         $this->entityContextManager = $entityContextManager;

app/Http/Controllers/ChapterController.php

@@ -1,7 +1,7 @@
 <?php namespace BookStack\Http\Controllers;
 
 use BookStack\Entities\Book;
-use BookStack\Entities\Managers\BookContents;
+use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Repos\ChapterRepo;
 use BookStack\Exceptions\MoveOperationException;
 use BookStack\Exceptions\NotFoundException;

app/Http/Controllers/HomeController.php

@@ -2,7 +2,7 @@
 
 use Activity;
 use BookStack\Entities\Book;
-use BookStack\Entities\Managers\PageContent;
+use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Page;
 use BookStack\Entities\Repos\BookRepo;
 use BookStack\Entities\Repos\BookshelfRepo;

app/Http/Controllers/MaintenanceController.php

@@ -3,7 +3,7 @@
 namespace BookStack\Http\Controllers;
 
 use BookStack\Actions\ActivityType;
-use BookStack\Entities\Managers\TrashCan;
+use BookStack\Entities\Tools\TrashCan;
 use BookStack\Notifications\TestEmail;
 use BookStack\Uploads\ImageService;
 use Illuminate\Http\Request;

app/Http/Controllers/PageController.php

@@ -1,8 +1,8 @@
 <?php namespace BookStack\Http\Controllers;
 
-use BookStack\Entities\Managers\BookContents;
-use BookStack\Entities\Managers\PageContent;
-use BookStack\Entities\Managers\PageEditActivity;
+use BookStack\Entities\Tools\BookContents;
+use BookStack\Entities\Tools\PageContent;
+use BookStack\Entities\Tools\PageEditActivity;
 use BookStack\Entities\Page;
 use BookStack\Entities\Repos\PageRepo;
 use BookStack\Exceptions\NotFoundException;

app/Http/Controllers/PageExportController.php

@@ -3,7 +3,7 @@
 namespace BookStack\Http\Controllers;
 
 use BookStack\Entities\ExportService;
-use BookStack\Entities\Managers\PageContent;
+use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Repos\PageRepo;
 use BookStack\Exceptions\NotFoundException;
 use Throwable;

app/Http/Controllers/PageRevisionController.php

@@ -1,6 +1,6 @@
 <?php namespace BookStack\Http\Controllers;
 
-use BookStack\Entities\Managers\PageContent;
+use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Repos\PageRepo;
 use BookStack\Exceptions\NotFoundException;
 use GatherContent\Htmldiff\Htmldiff;

app/Http/Controllers/RecycleBinController.php

@@ -2,7 +2,7 @@
 
 use BookStack\Actions\ActivityType;
 use BookStack\Entities\Deletion;
-use BookStack\Entities\Managers\TrashCan;
+use BookStack\Entities\Tools\TrashCan;
 
 class RecycleBinController extends Controller
 {

app/Http/Controllers/SearchController.php

@@ -4,7 +4,7 @@ use BookStack\Actions\ViewService;
 use BookStack\Entities\Book;
 use BookStack\Entities\Bookshelf;
 use BookStack\Entities\Entity;
-use BookStack\Entities\Managers\EntityContext;
+use BookStack\Entities\Tools\ShelfContext;
 use BookStack\Entities\SearchService;
 use BookStack\Entities\SearchOptions;
 use Illuminate\Http\Request;
@@ -21,7 +21,7 @@ class SearchController extends Controller
     public function __construct(
         ViewService $viewService,
         SearchService $searchService,
-        EntityContext $entityContextManager
+        ShelfContext $entityContextManager
     ) {
         $this->viewService = $viewService;
         $this->searchService = $searchService;