syntax = "proto3";

package jwebmail;

message MIMEHeader {

  enum ContentDisposition {
    CONTENT_DISPOSITION_NONE       = 0;
    CONTENT_DISPOSITION_INLINE     = 1;
    CONTENT_DISPOSITION_ATTACHMENT = 2;
  }

  string             maintype     = 1;
  string             subtype      = 2;
  ContentDisposition contentdispo = 3;
  optional string    file_name    = 4;
}

message MailHeader {

  message MailAddr {
    optional string name    = 1;
    string          address = 2;
  }

  string            send_date    =  1;
  repeated MailAddr written_from =  2;
  optional MailAddr sender       =  3;
  repeated MailAddr reply_to     =  4;
  repeated MailAddr send_to      =  5;
  repeated MailAddr cc           =  6;
  repeated MailAddr bcc          =  7;
  string            subject      =  8;
  repeated string   comments     =  9;
  repeated string   keywords     = 10;
  MIMEHeader        mime         = 11;
}

message ListMailHeader {
  uint64     byte_size  = 1;
  bool       unread     = 2;
  string     rec_date   = 3;
  string     mid        = 4;
  MailHeader header     = 5;
}

message MailBody {
  message Multipart {
    optional string   preamble = 1;
    repeated MIMEPart parts    = 2;
    optional string   epilogue = 3;
  }

  oneof Body {
    string    discrete  = 1;
    Multipart multipart = 2;
    Mail      mail      = 3;
  }
}

message Mail {
  MailHeader head = 1;
  MailBody   body = 2;
}

message MIMEPart {
  MIMEHeader mime_header = 1;
  MailBody   body        = 2;
}

// Request-Response pairs

message ListReq {
  string folder = 1;
  int32  start  = 2;
  int32  end    = 3;
  string sort   = 4;
}

message ListResp {
  repeated ListMailHeader mail_heads = 1;
}

message StatsReq {
  string folder = 1;
}

message StatsResp {
  uint32 mail_count   = 1;
  uint32 unread_count = 2;
  uint64 byte_size    = 3;
}

message ShowReq {
  string folder = 1;
  string mid    = 2;
}

message ShowResp {
  Mail mail = 1;
}

message RawReq {
  string          folder = 1;
  string          mid    = 2;
  optional string path   = 3;
}

message RawResp {
  MIMEHeader header = 1;
  bytes      body   = 2;
}

message SearchReq {
  string folder  = 1;
  string pattern = 2;
}

message SearchResp {
  repeated ListMailHeader found = 1;
}

message FoldersReq {
}

message FoldersResp {
  repeated string folders = 1;
}

message MoveReq {
  string mid    = 1;
  string from_f = 2;
  string to_f   = 3;
}

message MoveResp {
}

message RemoveReq {
  string folder = 1;
  string mid    = 2;
}

message RemoveResp {
}

service MailService {
  rpc List(ListReq)       returns (ListResp);
  rpc Stats(StatsReq)     returns (StatsResp);
  rpc Show(ShowReq)       returns (ShowResp);
  rpc Raw(RawReq)         returns (RawResp);
  rpc Search(SearchReq)   returns (SearchResp);
  rpc Folders(FoldersReq) returns (FoldersResp);
  rpc Move(MoveReq)       returns (MoveResp);
  rpc Remove(RemoveReq)   returns (RemoveResp);
}