astra/owpengram-server
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

welcome message: link @zio with a mention entity

Browse source
This commit is contained in:
Astra 2026-09-08 16:29:37 +01:00
parent f8aefb7fd5
commit 233a2399e9
2 changed files with 68 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

43
internal/domain/welcome_message.go
View file

@ -6,7 +6,12 @@ import (
"strings"
)
const officialWelcomeMessageTemplate = "👋 Welcome to OwpenGram!\n\nYou just signed in via %s.\n\nIf this wasn't you, revoke this session from \"Settings > Privacy and Security > Active sessions\" immediately.\n\nIf you haven't already, feel free to join @zio for all the latest updates!"
// officialUpdatesChannelMention is the public @username of the updates channel
// linked from the welcome message. It is carried both in the template text and
// in a MessageEntityMention so clients render it as a tappable link.
const officialUpdatesChannelMention = "@zio"
const officialWelcomeMessageTemplate = "👋 Welcome to OwpenGram!\n\nYou just signed in via %s.\n\nIf this wasn't you, revoke this session from \"Settings > Privacy and Security > Active sessions\" immediately.\n\nIf you haven't already, feel free to join " + officialUpdatesChannelMention + " for all the latest updates!"
// OfficialWelcomeMessage builds the account-visible incoming message sent
// from the official system account on every completed sign-in (SignUp and
@ -20,13 +25,43 @@ func OfficialWelcomeMessage(userID int64, method string, date int) (Message, err
if userID <= 0 || IsSystemUserID(userID) || method == "" || date < 0 || date > math.MaxInt32 {
return Message{}, fmt.Errorf("%w: user=%d method=%q date=%d", ErrLoginCodeDeliveryInvalid, userID, method, date)
}
return Message{
body := fmt.Sprintf(officialWelcomeMessageTemplate, method)
msg := Message{
OwnerUserID: userID,
Peer: Peer{Type: PeerTypeUser, ID: OfficialSystemUserID},
From: Peer{Type: PeerTypeUser, ID: OfficialSystemUserID},
Date: date,
Body: fmt.Sprintf(officialWelcomeMessageTemplate, method),
}, nil
Body: body,
}
if ent, ok := usernameMentionEntity(body, officialUpdatesChannelMention); ok {
msg.Entities = []MessageEntity{ent}
}
return msg, nil
}
// usernameMentionEntity locates mention ("@name") in text and returns a
// MessageEntityMention spanning it, with the UTF-16 offset/length clients expect.
func usernameMentionEntity(text, mention string) (MessageEntity, bool) {
before, _, found := strings.Cut(text, mention)
if !found {
return MessageEntity{}, false
}
return MessageEntity{
Type: MessageEntityMention,
Offset: utf16Len(before),
Length: utf16Len(mention),
}, true
}
func utf16Len(s string) int {
n := 0
for _, r := range s {
n++
if r > 0xffff {
n++
}
}
return n
}
// SignInMethodLabel returns the human-readable method name embedded in