/
dispatch.go
165 lines (131 loc) · 3.98 KB
/
dispatch.go
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package messages
import (
"errors"
"fmt"
"getmelange.com/app/models"
adErrors "airdispat.ch/errors"
"airdispat.ch/identity"
"airdispat.ch/message"
"airdispat.ch/routing"
"airdispat.ch/server"
"airdispat.ch/wire"
)
// Moving the Message Subsystem Here for Future-proofing
func SendAlert(r routing.Router, msgName string, from *identity.Identity, to string, serverAlias string) error {
addr, err := r.LookupAlias(to, routing.LookupTypeALERT)
if err != nil {
return err
}
msgDescription := server.CreateMessageDescription(msgName, serverAlias, from.Address, addr)
err = message.SignAndSend(msgDescription, from, addr)
if err != nil {
return err
}
return nil
}
func getProfile(r routing.Router, from *identity.Identity, to string, alias string) (*message.Mail, error) {
return downloadMessage(r, "profile", from, to, alias)
}
func GetAddresses(r routing.Router, to *models.Address) (server *identity.Address, author *identity.Address, err error) {
if to.Fingerprint == "" {
author, err = r.LookupAlias(to.Alias, routing.LookupTypeMAIL)
if err != nil {
return
}
} else {
author = identity.CreateAddressFromString(to.Fingerprint)
}
server, err = r.LookupAlias(to.Alias, routing.LookupTypeTX)
return
}
func downloadMessageFromServer(msgName string, from *identity.Identity, author *identity.Address, srv *identity.Address) (*message.Mail, error) {
txMsg := server.CreateTransferMessage(msgName, from.Address, srv, author)
bytes, typ, h, err := message.SendMessageAndReceive(txMsg, from, srv)
if err != nil {
return nil, err
}
if typ == wire.ErrorCode {
return nil, adErrors.CreateErrorFromBytes(bytes, h)
}
if typ != wire.MailCode {
return nil, errors.New("Wrong message type, got " + typ)
}
msg, err := message.CreateMailFromBytes(bytes, h)
if err != nil {
return nil, err
}
if msg.Name != "" && msg.Name != msgName {
return nil, fmt.Errorf("Name enumerated in the message (%s) is different than retrieved (%s).", msg.Name, msgName)
}
// TODO: Check for Name Accoutability Here
return msg, err
}
func downloadMessage(r routing.Router, msgName string, from *identity.Identity, to string, serverAlias string) (*message.Mail, error) {
toLookup := serverAlias
if toLookup == "" {
toLookup = to
}
srv, err := r.LookupAlias(serverAlias, routing.LookupTypeTX)
if err != nil {
return nil, err
}
author := identity.CreateAddressFromString(to)
return downloadMessageFromServer(msgName, from, author, srv)
}
func downloadPublicMail(r routing.Router, since uint64, from *identity.Identity, to *models.Address) ([]*message.Mail, error) {
srv, author, err := GetAddresses(r, to)
if err != nil {
return nil, err
}
txMsg := server.CreateTransferMessageList(since, from.Address, srv, author)
conn, err := message.ConnectToServer(srv.Location)
if err != nil {
return nil, err
}
defer conn.Close()
err = message.SignAndSendToConnection(txMsg, from, srv, conn)
if err != nil {
return nil, err
}
list, err := message.ReadMessageFromConnection(conn)
if err != nil {
return nil, err
}
bytes, typ, h, err := list.Reconstruct(from, true)
if err != nil {
return nil, err
}
if typ == wire.ErrorCode {
return nil, adErrors.CreateErrorFromBytes(bytes, h)
}
if typ != wire.MessageListCode {
return nil, errors.New("(a) Wrong message type, got " + typ)
}
msgList, err := server.CreateMessageListFromBytes(bytes, h)
if err != nil {
return nil, err
}
var output []*message.Mail
for i := uint64(0); i < msgList.Length; i++ {
data, err := message.ReadMessageFromConnection(conn)
if err != nil {
return output, err
}
bytes, typ, h, err := data.Reconstruct(from, false)
if err != nil {
return output, err
}
if typ == wire.ErrorCode {
return nil, adErrors.CreateErrorFromBytes(bytes, h)
}
if typ != wire.MailCode {
return output, errors.New("(b) Wrong message type, got " + typ)
}
mail, err := message.CreateMailFromBytes(bytes, h)
if err != nil {
return output, err
}
output = append(output, mail)
}
return output, nil
}