Markov: randomly say something to a list of approved channels

check interval is every 10 minutes, rows in markov_chatter_target
have a 1 in chance chance of leading to a line being generated,
every 10 minutes. (so an interval of 144 = 10 min * 6 * 24 = one line
per day, on average)

modules/Markov.py

@@ -68,6 +68,8 @@ class Markov(Module):
         Module.__init__(self, irc, config, server)
 
         self.next_shut_up_check = 0
+        self.next_chatter_check = 0
+        self.connection = None
         thread.start_new_thread(self.thread_do, ())
 
     def db_init(self):
@@ -185,6 +187,20 @@ class Markov(Module):
                 db.close()
                 print('sqlite error: ' + str(e))
                 raise
+        if (version < 7):
+            db = self.get_db()
+            try:
+                version = 7
+                db.execute('''
+                    ALTER TABLE markov_chatter_target ADD COLUMN chance INTEGER NOT NULL DEFAULT 99999''')
+                db.commit()
+                db.close()
+                self.db_register_module_version(self.__class__.__name__, version)
+            except sqlite3.Error as e:
+                db.rollback()
+                db.close()
+                print('sqlite error: ' + str(e))
+                raise
 
     def register_handlers(self):
         """Handle pubmsg/privmsg, to learn and/or reply to IRC events."""
@@ -298,8 +314,29 @@ class Markov(Module):
 
         while not self.is_shutdown:
             self._do_shut_up_checks()
+            self._do_random_chatter_check()
             time.sleep(1)
 
+    def _do_random_chatter_check(self):
+        """Randomly say something to a channel."""
+
+        # don't immediately potentially chatter, let the bot
+        # join channels first
+        if self.next_chatter_check == 0:
+            self.next_chatter_check = time.time() + 600
+
+        if self.next_chatter_check < time.time():
+            self.next_chatter_check = time.time() + 600
+
+            if self.connection is None:
+                # i haven't seen any text yet...
+                return
+
+            targets = self._get_chatter_targets()
+            for t in targets:
+                if random.randint(1, t['chance']) == 1:
+                    self.sendmsg(self.connection, t['target'], self._generate_line(t['target']))
+
     def _do_shut_up_checks(self):
         """Check to see if we've been talking too much, and shut up if so."""
 
@@ -440,14 +477,10 @@ class Markov(Module):
             dbfile = self.config.get('dr.botzo', 'database')
             db = sqlite3.connect(dbfile)
             db.row_factory = sqlite3.Row
-            query = 'SELECT target FROM markov_chatter_target'
+            query = 'SELECT target, chance FROM markov_chatter_target'
             cursor = db.execute(query)
             results = cursor.fetchall()
-
-            for result in results:
-                values.append(result['target'])
-
-            return values
+            return results
         except sqlite3.Error as e:
             db.close()
             print('sqlite error: ' + str(e))