Initial commit

internal/moon/chatMemberUpdated.go

@@ -0,0 +1,67 @@
+package moon
+
+import (
+	"fmt"
+	"slices"
+
+	"github.com/NicoNex/echotron/v3"
+)
+
+// newChatMember parses one of types ChatMemberUpdated event.
+// https://core.telegram.org/bots/api#chatmemberupdated
+func newChatMember(msg *echotron.Update) {
+	Log.Infof(
+		"User %s %s (username = %s, id = %d) in chat %s %s (%d) now %s was %s",
+		msg.ChatMember.NewChatMember.User.FirstName,
+		msg.ChatMember.NewChatMember.User.LastName,
+		msg.ChatMember.NewChatMember.User.Username,
+		msg.ChatMember.NewChatMember.User.ID,
+		msg.ChatMember.Chat.Type,
+		msg.ChatMember.Chat.Title,
+		msg.ChatMember.Chat.ID,
+		msg.ChatMember.NewChatMember.Status,
+		msg.ChatMember.OldChatMember.Status,
+	)
+
+	// Keep list of chats updated.
+	ChatList = append(ChatList, msg.ChatMember.Chat.ID)
+	slices.Sort(ChatList)
+	ChatList = slices.Compact(ChatList)
+
+	Log.Info("Processing ChatMemberUpdated event")
+
+	// Check some other attributes.
+	if msg.ChatMember.OldChatMember.Status == "left" && msg.ChatMember.NewChatMember.Status == "member" {
+		leftTimestampString := Cfg.GetValue(
+			"LeftMembers",
+			fmt.Sprintf("%d", msg.ChatMember.Chat.ID),
+			fmt.Sprintf("%d", msg.ChatMember.NewChatMember.User.ID),
+		)
+
+		// Yes, this member definitely left chat at some point, we have no question to him/her.
+		if leftTimestampString != "" {
+			return
+		}
+
+		// Spam bots come with these attributes.
+		// msg.ChatMember.NewChatMember.Status = "member"
+		// msg.ChatMember.OldChatMember.User != nil
+		// msg.ChatMember.OldChatMember.Status = "left"
+
+		casBanned, err := CasCheckID(msg.ChatMember.NewChatMember.User.ID)
+
+		if err != nil {
+			Log.Error(err)
+		}
+
+		// Ban user if cas report it as banned.
+		if casBanned {
+			Log.Infof("Ban user %d in chat %d by CAS blacklist")
+			squash(msg.Message.Chat.ID, msg.ChatMember.NewChatMember.User.ID)
+		}
+
+		AddAppearedMember(msg.ChatMember.Chat.ID, msg.ChatMember.NewChatMember.User.ID)
+	}
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */