HandlerPageEdit: Add 'frompage' GET parameter to use a page as a template

handlers/handlerpageedit.cpp

@@ -42,7 +42,7 @@ Response HandlerPageEdit::handleRequest(PageDao &pageDao, std::string pagename,
 		return errorResponse("No permission", "You don't have permission to create new pages");
 	}
 	auto revisiondao = this->database->createRevisionDao();
-	auto revision = this->database->createRevisionDao()->getCurrentForPage(pagename);
+	auto revision = revisiondao->getCurrentForPage(pagename);
 	std::string body;
 
 	unsigned int current_revision = 0;
@@ -51,6 +51,15 @@ Response HandlerPageEdit::handleRequest(PageDao &pageDao, std::string pagename,
 		body = revision->content;
 		current_revision = revision->revision;
 	}
+	std::string from = r.get("frompage");
+	if(!from.empty())
+	{
+		if(!effectivePermissions(from).canRead())
+		{
+			return this->errorResponse("Permission denied", "No access permissions, so you can't use this page as a template");
+		}
+		body = revisiondao->getCurrentForPage(from)->content;
+	}
 	if(r.getRequestMethod() == "POST")
 	{
 		if(r.post("do") == "submit")