Added stopping criteria for chat mode to prevent it from generating text for user

aiserver.py

@@ -2177,6 +2177,46 @@ def patch_transformers():
             koboldai_vars.actions.stream_tokens(data)
             return False
     
+    class ChatModeStopper(StoppingCriteria):
+        # A StoppingCriteria is used here because it seems to run after
+        # everything has been evaluated score-wise. 
+        def __init__(self, tokenizer):
+            self.tokenizer = tokenizer
+
+        def __call__(
+            self,
+            input_ids: torch.LongTensor,
+            scores: torch.FloatTensor,
+            **kwargs,
+        ) -> bool:
+            
+            if not koboldai_vars.chatmode:
+                return False
+                
+            data = [tokenizer.decode(x) for x in input_ids]
+            null_character = tokenizer.encode(chr(0))[0]
+            if 'completed' not in self.__dict__:
+                self.completed = [False]*len(input_ids)
+            for i in range(len(input_ids)):
+                if input_ids[i][-2] == null_character:
+                    input_ids[i][-1] = tokenizer.encode(chr(0))[0]
+                elif data[i][-1*(len(koboldai_vars.chatname)+1):] == koboldai_vars.chatname + ":":
+                    #We now have the user name in chat mode with a :. We want to remove that from the data
+                    #We do need to check if the first token includes more than the chatname (Ie " You") so we don't loose the extra data
+                    chatname_tokens = len(tokenizer.encode(koboldai_vars.chatname+":"))
+                    if input_ids[i][-1*chatname_tokens] != koboldai_vars.chatname[0]:
+                        input_ids[i][-1*chatname_tokens] = tokenizer.encode(tokenizer.decode(input_ids[i][-1*chatname_tokens]))[0]
+                    else:
+                        input_ids[i][-1*chatname_tokens] = null_character
+                    for j in range(len(koboldai_vars.chatname)+1):
+                        input_ids[i][-j] = tokenizer.encode(chr(0))[0]
+                    self.completed[i] = True
+            if all(self.completed):
+                koboldai_vars.generated_tkns = koboldai_vars.genamt
+                return True
+            return False
+            
+
     class CoreStopper(StoppingCriteria):
         # Controls core generation stuff; aborting, counting generated tokens, etc
         def __init__(self):
@@ -2286,6 +2326,7 @@ def patch_transformers():
         stopping_criteria.insert(0, self.kai_scanner)
         token_streamer = TokenStreamer(tokenizer=tokenizer)
         stopping_criteria.insert(0, token_streamer)
+        stopping_criteria.insert(0, ChatModeStopper(tokenizer=tokenizer))
         return stopping_criteria
     transformers.generation_utils.GenerationMixin._get_stopping_criteria = new_get_stopping_criteria
 
@@ -3091,6 +3132,9 @@ def load_model(use_gpu=True, gpu_layers=None, disk_layers=None, initial_load=Fal
     
     koboldai_vars.presets = to_use
 
+    if tokenizer.pad_token is None:
+        tokenizer.add_special_tokens({'pad_token': '[PAD]'})
+    
     koboldai_vars.aibusy = False
     if not os.path.exists("./softprompts"):
         os.mkdir("./softprompts")