Add random reply chance to markov bot

Whenever someone says something, there's a chance that markov will
interject his opinion. Users can also set the chance between 0.0 and the
default value (in the config) if they want to see markov replies less
often.

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

plugins/markov.py

@@ -3,6 +3,7 @@ from collections import defaultdict
 import dataclasses
 import json
 import logging
+import math
 from pathlib import Path
 import random
 from typing import Any, List, Mapping, Sequence
@@ -35,8 +36,9 @@ def windows(items: Sequence[Any], size: int):
 
 @dataclasses.dataclass
 class Chain:
-    def __init__(self, order: int, path: Path):
+    def __init__(self, order: int, chance: float, path: Path):
         self.order = order
+        self.reply_chance = chance
         self.path = path
         self.__cache = chain_default()
         self.__last_access = 0.0
@@ -85,6 +87,10 @@ class Chain:
             return
         with open(self.path) as fp:
             log.info("Loading markov chain from %s", self.path)
+            obj = json.load(fp)
+
+        # Load the save object
+        self.reply_chance = obj["reply_chance"]
         self.__cache = defaultdict(
             chain_inner_default,
             {
@@ -95,7 +101,7 @@ class Chain:
                         for word, weight in value.items()
                     },
                 )
-                    for key, value in json.load(fp).items()
+                for key, value in obj["chain"]
             },
         )
         self.__dirty = False
@@ -106,18 +112,21 @@ class Chain:
         if self.__dirty:
             log.info("Saving markov chain to %s", self.path)
             self.path.parent.mkdir(parents=True, exist_ok=True)
-            with open(self.path, "w") as fp:
-                json.dump(
-                    {
+            # Build the save object
+            obj = {
+                "reply_chance": self.reply_chance,
+                "chain": {
                     key: {
                         ("" if word is None else word): weight
                         for word, weight in value.items()
                     }
                     for key, value in self.__cache.items()
                 },
-                    fp,
-                )
+            }
+            with open(self.path, "w") as fp:
+                json.dump(obj, fp)
             self.__dirty = False
+
         if not retain:
             log.debug("Pruning markov chain %s from memory", self.path)
             self.clear_cache()
@@ -162,6 +171,7 @@ class Markov(Plugin):
         self.order = int(self.plugin_config.get("order", 1))
         self.data_path = Path(self.plugin_config.get("data_path", "data/markov"))
         self.save_every = int(self.plugin_config.get("save_every", 300))
+        self.reply_chance = float(self.plugin_config.get("reply_chance", 0.01))
         self.__chains = {}
         self.__save_loop_task = None
         self.__saving = asyncio.Lock()
@@ -180,17 +190,22 @@ class Markov(Plugin):
         elif line[0] != "!":
             # ignore other commands
             self.add(channel, who.nick, line)
+            # also, maybe generate a sentence
+            chosen = random.random()
+            chain = self.get_chain(channel, who)
+            if chosen <= chain.reply_chance:
+                pass
 
     def get_chain(self, channel: str, who: str) -> Chain:
         if channel not in self.__chains:
             self.__chains[channel] = {}
         if who not in self.__chains[channel]:
             path = self.data_path / channel / who
-            self.__chains[channel][who] = Chain(self.order, path)
+            self.__chains[channel][who] = Chain(self.order, self.reply_chance, path)
         return self.__chains[channel][who]
 
     def add(self, channel: str, who: str, line: str):
-        if who == self.server_config.nick == who:
+        if who == self.server_config.nick:
             return
         chain = self.get_chain(channel, who)
         chain.add(line)
@@ -208,7 +223,7 @@ class Markov(Plugin):
                 if message:
                     self.send_to(conn, channel, f"{who.nick}: {message}")
             case ["force", nick] | ["emulate", nick]:
-                chain = self.get_chain(channel, who.nick)
+                chain = self.get_chain(channel, nick)
                 if not chain:
                     return
                 message = chain.generate()
@@ -219,6 +234,13 @@ class Markov(Plugin):
                 message = chain.generate()
                 if message:
                     self.send_to(conn, channel, f"{who.nick}: {message}")
+            case ["chance", chance]:
+                chain = self.get_chain(channel, who.nick)
+                reply_chance = float(chance)
+                if not math.isnan(reply_chance):
+                    chain.reply_chance = min(
+                        max(float(reply_chance), 0.0), self.reply_chance
+                    )
             case _:
                 # command not recognized
                 pass

tools/markov_import.py

@@ -38,7 +38,8 @@ async def main():
             for line in lines:
                 if mat := LINE_RE.search(line):
                     name = mat["name"]
-                    message = mat["message"]
+                    message = mat["message"].strip()
+                    if name != server_config.nick and message and message[0] != "!":
                         plugin.add(channel, name, message)
     await plugin.save()