Implemented user, api_tokem & role activity logging

Also refactored some role content, primarily updating the permission
controller to be RoleController since it only dealt with roles.

app/Http/Controllers/RoleController.php

@@ -0,0 +1,122 @@
+<?php namespace BookStack\Http\Controllers;
+
+use BookStack\Auth\Permissions\PermissionsRepo;
+use BookStack\Exceptions\PermissionsException;
+use Exception;
+use Illuminate\Http\Request;
+use Illuminate\Validation\ValidationException;
+
+class RoleController extends Controller
+{
+
+    protected $permissionsRepo;
+
+    /**
+     * PermissionController constructor.
+     */
+    public function __construct(PermissionsRepo $permissionsRepo)
+    {
+        $this->permissionsRepo = $permissionsRepo;
+        parent::__construct();
+    }
+
+    /**
+     * Show a listing of the roles in the system.
+     */
+    public function list()
+    {
+        $this->checkPermission('user-roles-manage');
+        $roles = $this->permissionsRepo->getAllRoles();
+        return view('settings.roles.index', ['roles' => $roles]);
+    }
+
+    /**
+     * Show the form to create a new role
+     */
+    public function create()
+    {
+        $this->checkPermission('user-roles-manage');
+        return view('settings.roles.create');
+    }
+
+    /**
+     * Store a new role in the system.
+     */
+    public function store(Request $request)
+    {
+        $this->checkPermission('user-roles-manage');
+        $this->validate($request, [
+            'display_name' => 'required|min:3|max:180',
+            'description' => 'max:180'
+        ]);
+
+        $this->permissionsRepo->saveNewRole($request->all());
+        $this->showSuccessNotification(trans('settings.role_create_success'));
+        return redirect('/settings/roles');
+    }
+
+    /**
+     * Show the form for editing a user role.
+     * @throws PermissionsException
+     */
+    public function edit(string $id)
+    {
+        $this->checkPermission('user-roles-manage');
+        $role = $this->permissionsRepo->getRoleById($id);
+        if ($role->hidden) {
+            throw new PermissionsException(trans('errors.role_cannot_be_edited'));
+        }
+        return view('settings.roles.edit', ['role' => $role]);
+    }
+
+    /**
+     * Updates a user role.
+     * @throws ValidationException
+     */
+    public function update(Request $request, string $id)
+    {
+        $this->checkPermission('user-roles-manage');
+        $this->validate($request, [
+            'display_name' => 'required|min:3|max:180',
+            'description' => 'max:180'
+        ]);
+
+        $this->permissionsRepo->updateRole($id, $request->all());
+        $this->showSuccessNotification(trans('settings.role_update_success'));
+        return redirect('/settings/roles');
+    }
+
+    /**
+     * Show the view to delete a role.
+     * Offers the chance to migrate users.
+     */
+    public function showDelete(string $id)
+    {
+        $this->checkPermission('user-roles-manage');
+        $role = $this->permissionsRepo->getRoleById($id);
+        $roles = $this->permissionsRepo->getAllRolesExcept($role);
+        $blankRole = $role->newInstance(['display_name' => trans('settings.role_delete_no_migration')]);
+        $roles->prepend($blankRole);
+        return view('settings.roles.delete', ['role' => $role, 'roles' => $roles]);
+    }
+
+    /**
+     * Delete a role from the system,
+     * Migrate from a previous role if set.
+     * @throws Exception
+     */
+    public function delete(Request $request, string $id)
+    {
+        $this->checkPermission('user-roles-manage');
+
+        try {
+            $this->permissionsRepo->deleteRole($id, $request->get('migrate_role_id'));
+        } catch (PermissionsException $e) {
+            $this->showErrorNotification($e->getMessage());
+            return redirect()->back();
+        }
+
+        $this->showSuccessNotification(trans('settings.role_delete_success'));
+        return redirect('/settings/roles');
+    }
+}