/
group_chat.go
145 lines (120 loc) · 2.77 KB
/
group_chat.go
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package chat
import (
"encoding/hex"
"errors"
"time"
db "github.com/Bit-Nation/panthalassa/db"
uid "github.com/satori/go.uuid"
ed25519 "golang.org/x/crypto/ed25519"
)
func (c *Chat) AddUserToGroupChat(partners []ed25519.PublicKey, chatID int) error {
chat, err := c.chatStorage.GetChat(chatID)
if err != nil {
return err
}
if chat == nil {
return errors.New("couldn't find chat")
}
if !chat.IsGroupChat() {
return errors.New("chat must be a group chat")
}
// update chat partners
if err := chat.AddChatPartners(partners); err != nil {
return err
}
// fetch chat
for _, partner := range partners {
// fetch chat
partnerChat, err := c.chatStorage.GetChatByPartner(partner)
if err != nil {
return err
}
if partnerChat == nil {
_, err = c.chatStorage.CreateChat(partner)
if err != nil {
return err
}
}
partnerChat, err = c.chatStorage.GetChatByPartner(partner)
if err != nil {
return err
}
if partnerChat == nil {
return errors.New("chat with partner should exist at this point in time")
}
// persist message
msg := db.Message{
AddUserToChat: &db.AddUserToChat{
Users: partners,
ChatID: chat.GroupChatRemoteID,
},
}
if err := partnerChat.PersistMessage(msg); err != nil {
return err
}
}
return nil
}
func (c *Chat) CreateGroupChat(partners []ed25519.PublicKey, name string) (int, error) {
// create chat
chatID, err := c.chatStorage.CreateGroupChat(partners, name)
if err != nil {
return 0, err
}
// fetch group chat
groupChat, err := c.chatStorage.GetChat(chatID)
if err != nil {
return 0, err
}
// sender
idKeyStr, err := c.km.IdentityPublicKey()
if err != nil {
return 0, err
}
idKey, err := hex.DecodeString(idKeyStr)
if err != nil {
return 0, err
}
// send message to our group chat partners
for _, partner := range partners {
// fetch chat
partnerChat, err := c.chatStorage.GetChatByPartner(partner)
if err != nil {
return 0, err
}
if partnerChat == nil {
_, err = c.chatStorage.CreateChat(partner)
if err != nil {
return 0, err
}
}
partnerChat, err = c.chatStorage.GetChatByPartner(partner)
if err != nil {
return 0, err
}
if partnerChat == nil {
return 0, errors.New("chat with partner should exist at this point in time")
}
msgID, err := uid.NewV4()
if err != nil {
return 0, err
}
// persist message
msg := db.Message{
AddUserToChat: &db.AddUserToChat{
Users: partners,
ChatID: groupChat.GroupChatRemoteID,
},
Version: 1,
CreatedAt: time.Now().UnixNano(),
Status: db.StatusPersisted,
Sender: idKey,
GroupChatID: groupChat.GroupChatRemoteID,
ID: msgID.String(),
}
if err := partnerChat.PersistMessage(msg); err != nil {
return 0, err
}
}
return chatID, nil
}