Add naiive markov all and allchain

Markov all grows fast and 5 years of data uses about 2gb in memory. We
can do better.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

plugins/markov.py

@@ -14,6 +14,7 @@ from omnibot.plugin import Plugin
 
 
 log = logging.getLogger(__name__)
+ALLCHAIN = "ALL!CHAIN"
 
 
 def chain_inner_default() -> defaultdict[str | None, int]:
@@ -115,9 +116,9 @@ class Chain:
                 fp,
             )
         if not retain:
-            self.clear()
+            self.clear_cache()
 
-    def clear(self):
+    def clear_cache(self):
         self.__cache.clear()
 
     def __bool__(self) -> bool:
@@ -185,8 +186,12 @@ class Markov(Plugin):
         return self.__chains[channel][who]
 
     def add(self, channel: str, who: str, line: str):
+        if who == self.server_config.nick == who:
+            return
         chain = self.get_chain(channel, who)
         chain.add(line)
+        allchain = self.get_chain(channel, ALLCHAIN)
+        allchain.add(line)
 
     def handle_command(
         self, conn: IrcProtocol, channel: str, who: Prefix, parts: Sequence[str]
@@ -205,6 +210,11 @@ class Markov(Plugin):
                 message = chain.generate()
                 if message:
                     self.send_to(conn, channel, f"{who.nick}: {message}")
+            case ["all"]:
+                chain = self.get_chain(channel, ALLCHAIN)
+                message = chain.generate()
+                if message:
+                    self.send_to(conn, channel, f"{who.nick}: {message}")
             case _:
                 # command not recognized
                 pass