Merge pull request #1667 from borzovplus/monoforum-support

Monoforum support in tdlib_ids

Author: ernado

constant/tdlib_ids.go

@@ -3,14 +3,24 @@ package constant
 const (
 	// MaxTDLibChatID is maximum chat TDLib ID.
 	MaxTDLibChatID = 999999999999
-	// MaxTDLibChannelID is maximum channel TDLib ID.
-	MaxTDLibChannelID = 1000000000000 - int64(1<<31)
-	// ZeroTDLibChannelID is minimum channel TDLib ID.
+	// MaxTDLibChannelID is maximum channel TDLib ID (non-monoforum).
+	MaxTDLibChannelID = 1000000000000 - int64(1<<31) // 997852516352
+	// ZeroTDLibChannelID is base for channel IDs.
 	ZeroTDLibChannelID = -1000000000000
 	// ZeroTDLibSecretChatID is minimum secret chat TDLib ID.
 	ZeroTDLibSecretChatID = -2000000000000
 	// MaxTDLibUserID is maximum user TDLib ID.
 	MaxTDLibUserID = (1 << 40) - 1
+
+	// MinMTProtoMonoforumID is the minimum MTProto ID for monoforums.
+	MinMTProtoMonoforumID = 1002147483649
+	// MaxMTProtoMonoforumID is the maximum MTProto ID for monoforums.
+	MaxMTProtoMonoforumID = 3000000000000
+
+	// MinBotAPIMonoforumID = -(1e12 + MaxMTProtoMonoforumID)
+	MinBotAPIMonoforumID = -4000000000000
+	// MaxBotAPIMonoforumID = -(1e12 + MinMTProtoMonoforumID)
+	MaxBotAPIMonoforumID = -2002147483649
 )
 
 // TDLibPeerID is TDLib's peer ID.
@@ -26,21 +36,20 @@ func (id *TDLibPeerID) Chat(p int64) {
 	*id = TDLibPeerID(-p)
 }
 
-// Channel sets TDLibPeerID value as channel.
+// Channel sets TDLibPeerID value as channel (including monoforum).
 func (id *TDLibPeerID) Channel(p int64) {
-	*id = TDLibPeerID(ZeroTDLibChannelID + (p * -1))
+	*id = TDLibPeerID(ZeroTDLibChannelID - p) // same as ZeroTDLibChannelID + (p * -1)
 }
 
-// ToPlain converts TDLib ID to plain ID.
+// ToPlain converts TDLib ID to plain (MTProto) ID.
 func (id TDLibPeerID) ToPlain() (r int64) {
 	switch {
 	case id.IsUser():
 		r = int64(id)
 	case id.IsChat():
-		r = int64(-id)
+		r = -int64(id)
 	case id.IsChannel():
-		r = int64(id) - ZeroTDLibChannelID
-		r = -r
+		r = -(int64(id) - ZeroTDLibChannelID)
 	}
 	return r
 }
@@ -52,13 +61,26 @@ func (id TDLibPeerID) IsUser() bool {
 
 // IsChat whether that given ID is chat ID.
 func (id TDLibPeerID) IsChat() bool {
-	return id < 0 && -MaxTDLibChatID <= id
+	return id < 0 && id >= -MaxTDLibChatID
+}
+
+// IsMonoforum checks if the ID belongs to a monoforum.
+func (id TDLibPeerID) IsMonoforum() bool {
+	return id >= MinBotAPIMonoforumID && id <= MaxBotAPIMonoforumID
 }
 
-// IsChannel whether that given ID is channel ID.
+// IsChannel whether that given ID is channel ID (including monoforums).
 func (id TDLibPeerID) IsChannel() bool {
-	return id < 0 &&
-		id != ZeroTDLibChannelID &&
-		!id.IsChat() &&
-		ZeroTDLibChannelID-TDLibPeerID(MaxTDLibChannelID) <= id
+	if id >= 0 {
+		return false
+	}
+	if id == ZeroTDLibChannelID || id.IsChat() {
+		return false
+	}
+	// Regular channels: -1997852516352 to -1000000000001
+	if id >= -1997852516352 && id <= -1000000000001 {
+		return true
+	}
+	// Monoforums: -4000000000000 to -2002147483649
+	return id >= MinBotAPIMonoforumID && id <= MaxBotAPIMonoforumID
 }