Global code ovehaul - remove CAS and other, add 15 minute greet check

- Remove CAS, as it no longer works for us
- Remove other checks
- Implement 15 minute greet timeout check
- Fix chat logos
- Ditch thirdparty logger, use stdlib log facility wrapper for logging

internal/moon/textMessage.go

@@ -1,58 +1,27 @@
 package moon
 
 import (
-	"fmt"
+	"time"
+
+	"bunny-bot/internal/elog"
 
 	"github.com/NicoNex/echotron/v3"
 )
 
-// textMessage handles text message events.
+// textMessage handles plain text messages. It does not moderate anything; it
+// only records the message so the greeting sweeper can tell that a newcomer
+// answered their greeting.
 func textMessage(msg *echotron.Update) {
-	AddChat(&msg.Message.Chat)
-	AddUser(msg.Message.From)
-
-	// Not sure if we must handle all kinds of these events.
-	if Cfg.LogChats {
-		switch {
-		// Just log it, it seems later here should be ban/mute command set.
-		case msg.Message != nil && msg.Message.ReplyToMessage == nil:
-			ChatLog(
-				msg.Message.Chat.ID,
-				fmt.Sprintf(
-					"User %s %s (username = %s, id = %d) in %s %s (%d) says: %s",
-					msg.Message.From.FirstName,
-					msg.Message.From.LastName,
-					msg.Message.From.Username,
-					msg.Message.From.ID,
-					msg.Message.Chat.Type,
-					msg.Message.Chat.Title,
-					msg.Message.Chat.ID,
-					msg.Message.Text,
-				),
-			)
-
-		case msg.Message != nil && msg.Message.ReplyToMessage != nil:
-			ChatLog(
-				msg.Message.Chat.ID,
-				fmt.Sprintf(
-					"User %s %s (username = %s, id = %d) in %s %s (%d) replies to message %d by %s %s (username = %s, id = %d): %s",
-					msg.Message.From.FirstName,
-					msg.Message.From.LastName,
-					msg.Message.From.Username,
-					msg.Message.From.ID,
-					msg.Message.Chat.Type,
-					msg.Message.Chat.Title,
-					msg.Message.Chat.ID,
-					msg.Message.ReplyToMessage.ID,
-					msg.Message.ReplyToMessage.From.FirstName,
-					msg.Message.ReplyToMessage.From.LastName,
-					msg.Message.ReplyToMessage.From.Username,
-					msg.Message.ReplyToMessage.From.ID,
-					msg.Message.Text,
-				),
-			)
-		}
+	if msg.Message == nil || msg.Message.Text == "" {
+		return
 	}
+
+	// Remember the message so the greeting sweeper can find the answer to a
+	// greeting.
+	GreetAnswers.Set(time.Now().UnixMicro(), msg.Message, greetCacheTTL)
+
+	// And record it in the chat's own log, which outlives the cache.
+	elog.LogMessage(msg.Message)
 }
 
 /* vim: set ft=go noet ai ts=4 sw=4 sts=4: */