text-generation-webui/modules/chat.py

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import ast
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import base64
import copy
import io
import json
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import logging
import re
from datetime import datetime
from pathlib import Path
import yaml
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from PIL import Image
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import modules.shared as shared
from modules.extensions import apply_extensions
from modules.html_generator import chat_html_wrapper, make_thumbnail
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from modules.text_generation import (encode, generate_reply,
get_max_prompt_length)
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# Replace multiple string pairs in a string
def replace_all(text, dic):
for i, j in dic.items():
text = text.replace(i, j)
return text
def generate_chat_prompt(user_input, state, **kwargs):
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# Check if an extension is sending its modified history.
# If not, use the regular history
history = state['history'] if 'history' in state else shared.history['internal']
# Define some variables
impersonate = kwargs['impersonate'] if 'impersonate' in kwargs else False
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_continue = kwargs['_continue'] if '_continue' in kwargs else False
also_return_rows = kwargs['also_return_rows'] if 'also_return_rows' in kwargs else False
is_instruct = state['mode'] == 'instruct'
rows = [state['context_instruct'] if is_instruct else f"{state['context'].strip()}\n"]
min_rows = 3
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# Finding the maximum prompt size
chat_prompt_size = state['chat_prompt_size']
if shared.soft_prompt:
chat_prompt_size -= shared.soft_prompt_tensor.shape[1]
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max_length = min(get_max_prompt_length(state), chat_prompt_size)
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# Building the turn templates
if is_instruct:
if 'turn_template' not in state or state['turn_template'] == '':
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template = '<|user|>\n<|user-message|>\n<|bot|>\n<|bot-message|>\n'
else:
template = state['turn_template'].replace(r'\n', '\n')
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else:
template = '<|user|>: <|user-message|>\n<|bot|>: <|bot-message|>\n'
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replacements = {
'<|user|>': state['name1_instruct' if is_instruct else 'name1'].strip(),
'<|bot|>': state['name2_instruct' if is_instruct else 'name2'].strip(),
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}
user_turn = replace_all(template.split('<|bot|>')[0], replacements)
bot_turn = replace_all('<|bot|>' + template.split('<|bot|>')[1], replacements)
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user_turn_stripped = replace_all(user_turn.split('<|user-message|>')[0], replacements)
bot_turn_stripped = replace_all(bot_turn.split('<|bot-message|>')[0], replacements)
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# Building the prompt
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i = len(history) - 1
while i >= 0 and len(encode(''.join(rows))[0]) < max_length:
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if _continue and i == len(history) - 1:
rows.insert(1, bot_turn_stripped + history[i][1].strip())
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else:
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rows.insert(1, bot_turn.replace('<|bot-message|>', history[i][1].strip()))
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string = history[i][0]
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if string not in ['', '<|BEGIN-VISIBLE-CHAT|>']:
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rows.insert(1, replace_all(user_turn, {'<|user-message|>': string.strip(), '<|round|>': str(i)}))
i -= 1
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if impersonate:
min_rows = 2
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rows.append(user_turn_stripped.rstrip(' '))
elif not _continue:
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# Adding the user message
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if len(user_input) > 0:
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rows.append(replace_all(user_turn, {'<|user-message|>': user_input.strip(), '<|round|>': str(len(history))}))
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# Adding the Character prefix
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rows.append(apply_extensions("bot_prefix", bot_turn_stripped.rstrip(' ')))
while len(rows) > min_rows and len(encode(''.join(rows))[0]) >= max_length:
rows.pop(1)
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prompt = ''.join(rows)
if also_return_rows:
return prompt, rows
else:
return prompt
def get_stopping_strings(state):
if state['mode'] == 'instruct':
stopping_strings = [f"\n{state['name1_instruct']}", f"\n{state['name2_instruct']}"]
else:
stopping_strings = [f"\n{state['name1']}:", f"\n{state['name2']}:"]
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stopping_strings += ast.literal_eval(f"[{state['custom_stopping_strings']}]")
return stopping_strings
def extract_message_from_reply(reply, state):
next_character_found = False
stopping_strings = get_stopping_strings(state)
if state['stop_at_newline']:
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lines = reply.split('\n')
reply = lines[0].strip()
if len(lines) > 1:
next_character_found = True
else:
for string in stopping_strings:
idx = reply.find(string)
if idx != -1:
reply = reply[:idx]
next_character_found = True
# If something like "\nYo" is generated just before "\nYou:"
# is completed, trim it
if not next_character_found:
for string in stopping_strings:
for j in range(len(string) - 1, 0, -1):
if reply[-j:] == string[:j]:
reply = reply[:-j]
break
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else:
continue
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break
return reply, next_character_found
def chatbot_wrapper(text, state, regenerate=False, _continue=False):
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if shared.model_name == 'None' or shared.model is None:
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logging.error("No model is loaded! Select one in the Model tab.")
yield shared.history['visible']
return
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# Defining some variables
cumulative_reply = ''
just_started = True
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visible_text = None
eos_token = '\n' if state['stop_at_newline'] else None
stopping_strings = get_stopping_strings(state)
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# Preparing the input
if not any((regenerate, _continue)):
text, visible_text = apply_extensions('input_hijack', text, visible_text)
if visible_text is None:
visible_text = text
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text = apply_extensions('input', text)
# *Is typing...*
yield shared.history['visible'] + [[visible_text, shared.processing_message]]
else:
text, visible_text = shared.history['internal'][-1][0], shared.history['visible'][-1][0]
if regenerate:
shared.history['visible'].pop()
shared.history['internal'].pop()
# *Is typing...*
yield shared.history['visible'] + [[visible_text, shared.processing_message]]
elif _continue:
last_reply = [shared.history['internal'][-1][1], shared.history['visible'][-1][1]]
yield shared.history['visible'][:-1] + [[visible_text, last_reply[1] + '...']]
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# Generating the prompt
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kwargs = {'_continue': _continue}
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prompt = apply_extensions('custom_generate_chat_prompt', text, state, **kwargs)
if prompt is None:
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prompt = generate_chat_prompt(text, state, **kwargs)
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# Generate
for i in range(state['chat_generation_attempts']):
reply = None
for reply in generate_reply(f"{prompt}{' ' if len(cumulative_reply) > 0 else ''}{cumulative_reply}", state, eos_token=eos_token, stopping_strings=stopping_strings):
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reply = cumulative_reply + reply
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# Extracting the reply
reply, next_character_found = extract_message_from_reply(reply, state)
visible_reply = re.sub("(<USER>|<user>|{{user}})", state['name1'], reply)
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visible_reply = apply_extensions("output", visible_reply)
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if _continue:
sep = ' ' if last_reply[0][-1] not in [' ', '\n'] else ''
reply = last_reply[0] + sep + reply
sep = ' ' if last_reply[1][-1] not in [' ', '\n'] else ''
visible_reply = last_reply[1] + sep + visible_reply
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# We need this global variable to handle the Stop event,
# otherwise gradio gets confused
if shared.stop_everything:
return shared.history['visible']
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if just_started:
just_started = False
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if not _continue:
shared.history['internal'].append(['', ''])
shared.history['visible'].append(['', ''])
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shared.history['internal'][-1] = [text, reply]
shared.history['visible'][-1] = [visible_text, visible_reply]
yield shared.history['visible']
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if next_character_found:
break
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if reply is not None:
cumulative_reply = reply
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yield shared.history['visible']
def impersonate_wrapper(text, state):
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if shared.model_name == 'None' or shared.model is None:
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logging.error("No model is loaded! Select one in the Model tab.")
yield ''
return
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# Defining some variables
cumulative_reply = ''
eos_token = '\n' if state['stop_at_newline'] else None
prompt = generate_chat_prompt(text, state, impersonate=True)
stopping_strings = get_stopping_strings(state)
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# Yield *Is typing...*
yield shared.processing_message
for i in range(state['chat_generation_attempts']):
reply = None
for reply in generate_reply(f"{prompt}{' ' if len(cumulative_reply) > 0 else ''}{cumulative_reply}", state, eos_token=eos_token, stopping_strings=stopping_strings):
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reply = cumulative_reply + reply
reply, next_character_found = extract_message_from_reply(reply, state)
yield reply
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if next_character_found:
break
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if reply is not None:
cumulative_reply = reply
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yield reply
def cai_chatbot_wrapper(text, state):
for history in chatbot_wrapper(text, state):
yield chat_html_wrapper(history, state['name1'], state['name2'], state['mode'], state['chat_style'])
def regenerate_wrapper(text, state):
if (len(shared.history['visible']) == 1 and not shared.history['visible'][0][0]) or len(shared.history['internal']) == 0:
yield chat_html_wrapper(shared.history['visible'], state['name1'], state['name2'], state['mode'], state['chat_style'])
else:
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for history in chatbot_wrapper('', state, regenerate=True):
yield chat_html_wrapper(history, state['name1'], state['name2'], state['mode'], state['chat_style'])
def continue_wrapper(text, state):
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if (len(shared.history['visible']) == 1 and not shared.history['visible'][0][0]) or len(shared.history['internal']) == 0:
yield chat_html_wrapper(shared.history['visible'], state['name1'], state['name2'], state['mode'], state['chat_style'])
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else:
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for history in chatbot_wrapper('', state, _continue=True):
yield chat_html_wrapper(history, state['name1'], state['name2'], state['mode'], state['chat_style'])
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def remove_last_message(name1, name2, mode, style):
if len(shared.history['visible']) > 0 and shared.history['internal'][-1][0] != '<|BEGIN-VISIBLE-CHAT|>':
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last = shared.history['visible'].pop()
shared.history['internal'].pop()
else:
last = ['', '']
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style), last[0]
def send_last_reply_to_input():
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if len(shared.history['internal']) > 0:
return shared.history['internal'][-1][1]
else:
return ''
def replace_last_reply(text, name1, name2, mode, style):
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if len(shared.history['visible']) > 0:
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shared.history['visible'][-1][1] = text
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shared.history['internal'][-1][1] = apply_extensions("input", text)
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def send_dummy_message(text, name1, name2, mode, style):
shared.history['visible'].append([text, ''])
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shared.history['internal'].append([apply_extensions("input", text), ''])
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def send_dummy_reply(text, name1, name2, mode, style):
if len(shared.history['visible']) > 0 and not shared.history['visible'][-1][1] == '':
shared.history['visible'].append(['', ''])
shared.history['internal'].append(['', ''])
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shared.history['visible'][-1][1] = text
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shared.history['internal'][-1][1] = apply_extensions("input", text)
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def clear_html():
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return chat_html_wrapper([], "", "")
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def clear_chat_log(name1, name2, greeting, mode, style):
shared.history['visible'] = []
shared.history['internal'] = []
if greeting != '':
shared.history['internal'] += [['<|BEGIN-VISIBLE-CHAT|>', greeting]]
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shared.history['visible'] += [['', apply_extensions("output", greeting)]]
# Save cleared logs
save_history(mode)
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def redraw_html(name1, name2, mode, style):
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def tokenize_dialogue(dialogue, name1, name2, mode, style):
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history = []
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messages = []
dialogue = re.sub('<START>', '', dialogue)
dialogue = re.sub('<start>', '', dialogue)
dialogue = re.sub('(\n|^)[Aa]non:', '\\1You:', dialogue)
dialogue = re.sub('(\n|^)\[CHARACTER\]:', f'\\g<1>{name2}:', dialogue)
idx = [m.start() for m in re.finditer(f"(^|\n)({re.escape(name1)}|{re.escape(name2)}):", dialogue)]
if len(idx) == 0:
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return history
for i in range(len(idx) - 1):
messages.append(dialogue[idx[i]:idx[i + 1]].strip())
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messages.append(dialogue[idx[-1]:].strip())
entry = ['', '']
for i in messages:
if i.startswith(f'{name1}:'):
entry[0] = i[len(f'{name1}:'):].strip()
elif i.startswith(f'{name2}:'):
entry[1] = i[len(f'{name2}:'):].strip()
if not (len(entry[0]) == 0 and len(entry[1]) == 0):
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history.append(entry)
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entry = ['', '']
print("\033[1;32;1m\nDialogue tokenized to:\033[0;37;0m\n", end='')
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for row in history:
for column in row:
print("\n")
for line in column.strip().split('\n'):
print("| " + line + "\n")
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print("|\n")
print("------------------------------")
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return history
def save_history(mode, timestamp=False):
# Instruct mode histories should not be saved as if
# Alpaca or Vicuna were characters
if mode == 'instruct':
if not timestamp:
return
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fname = f"Instruct_{datetime.now().strftime('%Y%m%d-%H%M%S')}.json"
else:
if timestamp:
fname = f"{shared.character}_{datetime.now().strftime('%Y%m%d-%H%M%S')}.json"
else:
fname = f"{shared.character}_persistent.json"
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if not Path('logs').exists():
Path('logs').mkdir()
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with open(Path(f'logs/{fname}'), 'w', encoding='utf-8') as f:
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f.write(json.dumps({'data': shared.history['internal'], 'data_visible': shared.history['visible']}, indent=2))
return Path(f'logs/{fname}')
def load_history(file, name1, name2):
file = file.decode('utf-8')
try:
j = json.loads(file)
if 'data' in j:
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shared.history['internal'] = j['data']
if 'data_visible' in j:
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shared.history['visible'] = j['data_visible']
else:
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shared.history['visible'] = copy.deepcopy(shared.history['internal'])
except:
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shared.history['internal'] = tokenize_dialogue(file, name1, name2)
shared.history['visible'] = copy.deepcopy(shared.history['internal'])
def replace_character_names(text, name1, name2):
text = text.replace('{{user}}', name1).replace('{{char}}', name2)
return text.replace('<USER>', name1).replace('<BOT>', name2)
def build_pygmalion_style_context(data):
context = ""
if 'char_persona' in data and data['char_persona'] != '':
context += f"{data['char_name']}'s Persona: {data['char_persona']}\n"
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if 'world_scenario' in data and data['world_scenario'] != '':
context += f"Scenario: {data['world_scenario']}\n"
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context = f"{context.strip()}\n<START>\n"
return context
def generate_pfp_cache(character):
cache_folder = Path("cache")
if not cache_folder.exists():
cache_folder.mkdir()
for path in [Path(f"characters/{character}.{extension}") for extension in ['png', 'jpg', 'jpeg']]:
if path.exists():
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img = make_thumbnail(Image.open(path))
img.save(Path('cache/pfp_character.png'), format='PNG')
return img
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return None
def load_character(character, name1, name2, mode, style):
shared.character = character
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context = greeting = turn_template = ""
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greeting_field = 'greeting'
picture = None
# Deleting the profile picture cache, if any
if Path("cache/pfp_character.png").exists():
Path("cache/pfp_character.png").unlink()
if character != 'None':
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folder = 'characters' if not mode == 'instruct' else 'characters/instruction-following'
picture = generate_pfp_cache(character)
for extension in ["yml", "yaml", "json"]:
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filepath = Path(f'{folder}/{character}.{extension}')
if filepath.exists():
break
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file_contents = open(filepath, 'r', encoding='utf-8').read()
data = json.loads(file_contents) if extension == "json" else yaml.safe_load(file_contents)
# Finding the bot's name
for k in ['name', 'bot', '<|bot|>', 'char_name']:
if k in data and data[k] != '':
name2 = data[k]
break
# Find the user name (if any)
for k in ['your_name', 'user', '<|user|>']:
if k in data and data[k] != '':
name1 = data[k]
break
for field in ['context', 'greeting', 'example_dialogue', 'char_persona', 'char_greeting', 'world_scenario']:
if field in data:
data[field] = replace_character_names(data[field], name1, name2)
if 'context' in data:
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context = data['context']
if mode != 'instruct':
context = context.strip() + '\n\n'
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elif "char_persona" in data:
context = build_pygmalion_style_context(data)
greeting_field = 'char_greeting'
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if 'example_dialogue' in data:
context += f"{data['example_dialogue'].strip()}\n"
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if greeting_field in data:
greeting = data[greeting_field]
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if 'turn_template' in data:
turn_template = data['turn_template']
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else:
context = shared.settings['context']
name2 = shared.settings['name2']
greeting = shared.settings['greeting']
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turn_template = shared.settings['turn_template']
if mode != 'instruct':
shared.history['internal'] = []
shared.history['visible'] = []
if Path(f'logs/{shared.character}_persistent.json').exists():
load_history(open(Path(f'logs/{shared.character}_persistent.json'), 'rb').read(), name1, name2)
else:
# Insert greeting if it exists
if greeting != "":
shared.history['internal'] += [['<|BEGIN-VISIBLE-CHAT|>', greeting]]
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shared.history['visible'] += [['', apply_extensions("output", greeting)]]
# Create .json log files since they don't already exist
save_history(mode)
return name1, name2, picture, greeting, context, repr(turn_template)[1:-1], chat_html_wrapper(shared.history['visible'], name1, name2, mode, style)
def upload_character(json_file, img, tavern=False):
json_file = json_file if type(json_file) == str else json_file.decode('utf-8')
data = json.loads(json_file)
outfile_name = data["char_name"]
i = 1
while Path(f'characters/{outfile_name}.json').exists():
outfile_name = f'{data["char_name"]}_{i:03d}'
i += 1
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if tavern:
outfile_name = f'TavernAI-{outfile_name}'
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with open(Path(f'characters/{outfile_name}.json'), 'w', encoding='utf-8') as f:
f.write(json_file)
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if img is not None:
img = Image.open(io.BytesIO(img))
img.save(Path(f'characters/{outfile_name}.png'))
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logging.info(f'New character saved to "characters/{outfile_name}.json".')
return outfile_name
def upload_tavern_character(img, name1, name2):
_img = Image.open(io.BytesIO(img))
_img.getexif()
decoded_string = base64.b64decode(_img.info['chara'])
_json = json.loads(decoded_string)
_json = {"char_name": _json['name'], "char_persona": _json['description'], "char_greeting": _json["first_mes"], "example_dialogue": _json['mes_example'], "world_scenario": _json['scenario']}
return upload_character(json.dumps(_json), img, tavern=True)
def upload_your_profile_picture(img, name1, name2, mode, style):
cache_folder = Path("cache")
if not cache_folder.exists():
cache_folder.mkdir()
if img is None:
if Path("cache/pfp_me.png").exists():
Path("cache/pfp_me.png").unlink()
else:
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img = make_thumbnail(img)
img.save(Path('cache/pfp_me.png'))
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logging.info('Profile picture saved to "cache/pfp_me.png"')
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return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style, reset_cache=True)