handlers: permisison check for all pages + retrieve user-specific permissions for pages (if any)

handlers/handlerpagedelete.h

@@ -4,20 +4,11 @@
 
 class HandlerPageDelete : public HandlerPage
 {
-	bool pageMustExist() override
-	{
-		return true;
-	}
+	bool pageMustExist() override;
 
-	bool canAccess(std::string page) override
-	{
-		return this->userSession->user.permissions.canDelete();
-	}
+	bool canAccess(std::string page) override;
 
-	std::string accessErrorMessage() override
-	{
-		return "You don't have permission to delete pages";
-	}
+	std::string accessErrorMessage() override;
 
   public:
 	Response handleRequest(PageDao &pageDao, std::string pagename, const Request &r) override;