revert to include sender, but no sent folder

server/mail.cpp

@@ -1,5 +1,4 @@
 #include "mail.h"
-#include <cstdio>
 #include <mutex>
 
 mail::mail(std::string filename, std::string subject) :
@@ -41,6 +40,7 @@ json mail::mailToJson()
 
 	jsonfile["id"] = this->id;
 	jsonfile["timestamp"] = this->timestamp;
+	jsonfile["sender"] = this->sender;
 	jsonfile["recipient"] = this->recipient;
 	jsonfile["subject"] = this->subject;
 	jsonfile["filename"] = this->filename;

server/mail.h

@@ -17,6 +17,7 @@ struct mail {
 	/* metadata */
 	u_int id;
 	int64_t timestamp;
+	std::string sender;
 	std::string recipient;
 	std::string subject;
 

server/user.cpp

@@ -25,6 +25,7 @@ user::user(fs::path user_data_json) : m()
 			mail_json["subject"]
 		);
 		mail->id = mail_json["id"];
+		mail->sender = mail_json["sender"];
 		mail->recipient = mail_json["recipient"];
 		mail->deleted = mail_json["deleted"];