text-generation-webui/modules/chat.py
2023-06-02 13:58:08 -03:00

666 lines
23 KiB
Python

import ast
import base64
import copy
import functools
import io
import json
import re
from datetime import datetime
from pathlib import Path
import yaml
from PIL import Image
import modules.shared as shared
from modules.extensions import apply_extensions
from modules.html_generator import chat_html_wrapper, make_thumbnail
from modules.logging_colors import logger
from modules.text_generation import (generate_reply, get_encoded_length,
get_max_prompt_length)
from modules.utils import replace_all
def get_turn_substrings(state, instruct=False):
if instruct:
if 'turn_template' not in state or state['turn_template'] == '':
template = '<|user|>\n<|user-message|>\n<|bot|>\n<|bot-message|>\n'
else:
template = state['turn_template'].replace(r'\n', '\n')
else:
template = '<|user|>: <|user-message|>\n<|bot|>: <|bot-message|>\n'
replacements = {
'<|user|>': state['name1_instruct' if instruct else 'name1'].strip(),
'<|bot|>': state['name2_instruct' if instruct else 'name2'].strip(),
}
output = {
'user_turn': template.split('<|bot|>')[0],
'bot_turn': '<|bot|>' + template.split('<|bot|>')[1],
'user_turn_stripped': template.split('<|bot|>')[0].split('<|user-message|>')[0],
'bot_turn_stripped': '<|bot|>' + template.split('<|bot|>')[1].split('<|bot-message|>')[0],
}
for k in output:
output[k] = replace_all(output[k], replacements)
return output
def generate_chat_prompt(user_input, state, **kwargs):
impersonate = kwargs.get('impersonate', False)
_continue = kwargs.get('_continue', False)
also_return_rows = kwargs.get('also_return_rows', False)
history = kwargs.get('history', shared.history)['internal']
is_instruct = state['mode'] == 'instruct'
# Find the maximum prompt size
chat_prompt_size = state['chat_prompt_size']
if shared.soft_prompt:
chat_prompt_size -= shared.soft_prompt_tensor.shape[1]
max_length = min(get_max_prompt_length(state), chat_prompt_size)
all_substrings = {
'chat': get_turn_substrings(state, instruct=False),
'instruct': get_turn_substrings(state, instruct=True)
}
substrings = all_substrings['instruct' if is_instruct else 'chat']
# Create the template for "chat-instruct" mode
if state['mode'] == 'chat-instruct':
wrapper = ''
command = state['chat-instruct_command'].replace('<|character|>', state['name2'] if not impersonate else state['name1'])
wrapper += state['context_instruct']
wrapper += all_substrings['instruct']['user_turn'].replace('<|user-message|>', command)
wrapper += all_substrings['instruct']['bot_turn_stripped']
if impersonate:
wrapper += substrings['user_turn_stripped'].rstrip(' ')
elif _continue:
wrapper += apply_extensions("bot_prefix", substrings['bot_turn_stripped'])
wrapper += history[-1][1]
else:
wrapper += apply_extensions("bot_prefix", substrings['bot_turn_stripped'].rstrip(' '))
else:
wrapper = '<|prompt|>'
# Build the prompt
min_rows = 3
i = len(history) - 1
rows = [state['context_instruct'] if is_instruct else f"{state['context'].strip()}\n"]
while i >= 0 and get_encoded_length(wrapper.replace('<|prompt|>', ''.join(rows))) < max_length:
if _continue and i == len(history) - 1:
if state['mode'] != 'chat-instruct':
rows.insert(1, substrings['bot_turn_stripped'] + history[i][1].strip())
else:
rows.insert(1, substrings['bot_turn'].replace('<|bot-message|>', history[i][1].strip()))
string = history[i][0]
if string not in ['', '<|BEGIN-VISIBLE-CHAT|>']:
rows.insert(1, replace_all(substrings['user_turn'], {'<|user-message|>': string.strip(), '<|round|>': str(i)}))
i -= 1
if impersonate:
if state['mode'] == 'chat-instruct':
min_rows = 1
else:
min_rows = 2
rows.append(substrings['user_turn_stripped'].rstrip(' '))
elif not _continue:
# Add the user message
if len(user_input) > 0:
rows.append(replace_all(substrings['user_turn'], {'<|user-message|>': user_input.strip(), '<|round|>': str(len(history))}))
# Add the character prefix
if state['mode'] != 'chat-instruct':
rows.append(apply_extensions("bot_prefix", substrings['bot_turn_stripped'].rstrip(' ')))
while len(rows) > min_rows and get_encoded_length(wrapper.replace('<|prompt|>', ''.join(rows))) >= max_length:
rows.pop(1)
prompt = wrapper.replace('<|prompt|>', ''.join(rows))
if also_return_rows:
return prompt, rows
else:
return prompt
def get_stopping_strings(state):
stopping_strings = []
if state['mode'] in ['instruct', 'chat-instruct']:
stopping_strings += [
state['turn_template'].split('<|user-message|>')[1].split('<|bot|>')[0] + '<|bot|>',
state['turn_template'].split('<|bot-message|>')[1] + '<|user|>'
]
replacements = {
'<|user|>': state['name1_instruct'],
'<|bot|>': state['name2_instruct']
}
for i in range(len(stopping_strings)):
stopping_strings[i] = replace_all(stopping_strings[i], replacements).rstrip(' ').replace(r'\n', '\n')
if state['mode'] in ['chat', 'chat-instruct']:
stopping_strings += [
f"\n{state['name1']}:",
f"\n{state['name2']}:"
]
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']:
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
else:
continue
break
return reply, next_character_found
def chatbot_wrapper(text, history, state, regenerate=False, _continue=False, loading_message=True):
output = copy.deepcopy(history)
output = apply_extensions('history', output)
if shared.model_name == 'None' or shared.model is None:
logger.error("No model is loaded! Select one in the Model tab.")
yield output
return
# Defining some variables
just_started = True
visible_text = None
eos_token = '\n' if state['stop_at_newline'] else None
stopping_strings = get_stopping_strings(state)
# 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
text = apply_extensions('input', text)
# *Is typing...*
if loading_message:
yield {'visible': output['visible'] + [[visible_text, shared.processing_message]], 'internal': output['internal']}
else:
text, visible_text = output['internal'][-1][0], output['visible'][-1][0]
if regenerate:
output['visible'].pop()
output['internal'].pop()
# *Is typing...*
if loading_message:
yield {'visible': output['visible'] + [[visible_text, shared.processing_message]], 'internal': output['internal']}
elif _continue:
last_reply = [output['internal'][-1][1], output['visible'][-1][1]]
if loading_message:
yield {'visible': output['visible'][:-1] + [[visible_text, last_reply[1] + '...']], 'internal': output['internal']}
# Generating the prompt
kwargs = {
'_continue': _continue,
'history': output,
}
prompt = apply_extensions('custom_generate_chat_prompt', text, state, **kwargs)
if prompt is None:
prompt = generate_chat_prompt(text, state, **kwargs)
# Generate
cumulative_reply = ''
for i in range(state['chat_generation_attempts']):
reply = None
for j, reply in enumerate(generate_reply(prompt + cumulative_reply, state, eos_token=eos_token, stopping_strings=stopping_strings, is_chat=True)):
reply = cumulative_reply + reply
# Extract the reply
reply, next_character_found = extract_message_from_reply(reply, state)
visible_reply = re.sub("(<USER>|<user>|{{user}})", state['name1'], reply)
visible_reply = apply_extensions("output", visible_reply)
# We need this global variable to handle the Stop event,
# otherwise gradio gets confused
if shared.stop_everything:
yield output
return
if just_started:
just_started = False
if not _continue:
output['internal'].append(['', ''])
output['visible'].append(['', ''])
if _continue:
output['internal'][-1] = [text, last_reply[0] + reply]
output['visible'][-1] = [visible_text, last_reply[1] + visible_reply]
if state['stream']:
yield output
elif not (j == 0 and visible_reply.strip() == ''):
output['internal'][-1] = [text, reply.lstrip(' ')]
output['visible'][-1] = [visible_text, visible_reply.lstrip(' ')]
if state['stream']:
yield output
if next_character_found:
break
if reply in [None, cumulative_reply]:
break
else:
cumulative_reply = reply
yield output
def impersonate_wrapper(text, start_with, state):
if shared.model_name == 'None' or shared.model is None:
logger.error("No model is loaded! Select one in the Model tab.")
yield ''
return
# Defining some variables
cumulative_reply = ''
eos_token = '\n' if state['stop_at_newline'] else None
prompt = generate_chat_prompt('', state, impersonate=True)
stopping_strings = get_stopping_strings(state)
yield text + '...'
cumulative_reply = text
for i in range(state['chat_generation_attempts']):
reply = None
for reply in generate_reply(prompt + cumulative_reply, state, eos_token=eos_token, stopping_strings=stopping_strings, is_chat=True):
reply = cumulative_reply + reply
reply, next_character_found = extract_message_from_reply(reply, state)
yield reply.lstrip(' ')
if shared.stop_everything:
return
if next_character_found:
break
if reply in [None, cumulative_reply]:
break
else:
cumulative_reply = reply
yield cumulative_reply.lstrip(' ')
def generate_chat_reply(text, history, state, regenerate=False, _continue=False, loading_message=True):
if regenerate or _continue:
text = ''
if (len(history['visible']) == 1 and not history['visible'][0][0]) or len(history['internal']) == 0:
yield history
return
for history in chatbot_wrapper(text, history, state, regenerate=regenerate, _continue=_continue, loading_message=loading_message):
yield history
# Same as above but returns HTML for the UI
def generate_chat_reply_wrapper(text, start_with, state, regenerate=False, _continue=False):
if start_with != '' and _continue == False:
_continue = True
send_dummy_message(text)
send_dummy_reply(start_with)
for i, history in enumerate(generate_chat_reply(text, shared.history, state, regenerate, _continue, loading_message=True)):
if i != 0:
shared.history = copy.deepcopy(history)
yield chat_html_wrapper(history['visible'], state['name1'], state['name2'], state['mode'], state['chat_style'])
def remove_last_message():
if len(shared.history['visible']) > 0 and shared.history['internal'][-1][0] != '<|BEGIN-VISIBLE-CHAT|>':
last = shared.history['visible'].pop()
shared.history['internal'].pop()
else:
last = ['', '']
return last[0]
def send_last_reply_to_input():
if len(shared.history['internal']) > 0:
return shared.history['internal'][-1][1]
else:
return ''
def replace_last_reply(text):
if len(shared.history['visible']) > 0:
shared.history['visible'][-1][1] = text
shared.history['internal'][-1][1] = apply_extensions("input", text)
def send_dummy_message(text):
shared.history['visible'].append([text, ''])
shared.history['internal'].append([apply_extensions("input", text), ''])
def send_dummy_reply(text):
if len(shared.history['visible']) > 0 and not shared.history['visible'][-1][1] == '':
shared.history['visible'].append(['', ''])
shared.history['internal'].append(['', ''])
shared.history['visible'][-1][1] = text
shared.history['internal'][-1][1] = apply_extensions("input", text)
def clear_chat_log(greeting, mode):
shared.history['visible'] = []
shared.history['internal'] = []
if mode != 'instruct':
if greeting != '':
shared.history['internal'] += [['<|BEGIN-VISIBLE-CHAT|>', greeting]]
shared.history['visible'] += [['', apply_extensions("output", greeting)]]
save_history(mode)
def redraw_html(name1, name2, mode, style, reset_cache=False):
return chat_html_wrapper(shared.history['visible'], name1, name2, mode, style, reset_cache=reset_cache)
def tokenize_dialogue(dialogue, name1, name2):
history = []
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:
return history
for i in range(len(idx) - 1):
messages.append(dialogue[idx[i]:idx[i + 1]].strip())
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):
history.append(entry)
entry = ['', '']
print("\033[1;32;1m\nDialogue tokenized to:\033[0;37;0m\n", end='')
for row in history:
for column in row:
print("\n")
for line in column.strip().split('\n'):
print("| " + line + "\n")
print("|\n")
print("------------------------------")
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
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"
if not Path('logs').exists():
Path('logs').mkdir()
with open(Path(f'logs/{fname}'), 'w', encoding='utf-8') as f:
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:
shared.history['internal'] = j['data']
if 'data_visible' in j:
shared.history['visible'] = j['data_visible']
else:
shared.history['visible'] = copy.deepcopy(shared.history['internal'])
except:
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"
if 'world_scenario' in data and data['world_scenario'] != '':
context += f"Scenario: {data['world_scenario']}\n"
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():
img = make_thumbnail(Image.open(path))
img.save(Path('cache/pfp_character.png'), format='PNG')
return img
return None
def load_character(character, name1, name2, instruct=False):
shared.character = character
context = greeting = turn_template = ""
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':
folder = 'characters' if not instruct else 'characters/instruction-following'
picture = generate_pfp_cache(character)
for extension in ["yml", "yaml", "json"]:
filepath = Path(f'{folder}/{character}.{extension}')
if filepath.exists():
break
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:
context = data['context']
if not instruct:
context = context.strip() + '\n'
elif "char_persona" in data:
context = build_pygmalion_style_context(data)
greeting_field = 'char_greeting'
if 'example_dialogue' in data:
context += f"{data['example_dialogue'].strip()}\n"
if greeting_field in data:
greeting = data[greeting_field]
if 'turn_template' in data:
turn_template = data['turn_template']
else:
context = shared.settings['context']
name2 = shared.settings['name2']
greeting = shared.settings['greeting']
turn_template = shared.settings['turn_template']
if not 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]]
shared.history['visible'] += [['', apply_extensions("output", greeting)]]
# Create .json log files since they don't already exist
save_history('instruct' if instruct else 'chat')
return name1, name2, picture, greeting, context, repr(turn_template)[1:-1]
@functools.cache
def load_character_memoized(character, name1, name2, instruct=False):
return load_character(character, name1, name2, instruct=instruct)
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
if tavern:
outfile_name = f'TavernAI-{outfile_name}'
with open(Path(f'characters/{outfile_name}.json'), 'w', encoding='utf-8') as f:
f.write(json_file)
if img is not None:
img = Image.open(io.BytesIO(img))
img.save(Path(f'characters/{outfile_name}.png'))
logger.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):
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:
img = make_thumbnail(img)
img.save(Path('cache/pfp_me.png'))
logger.info('Profile picture saved to "cache/pfp_me.png"')
def delete_file(path):
if path.exists():
logger.warning(f'Deleting {path}')
path.unlink(missing_ok=True)
def save_character(name, greeting, context, picture, filename, instruct=False):
if filename == "":
logger.error("The filename is empty, so the character will not be saved.")
return
folder = 'characters' if not instruct else 'characters/instruction-following'
data = {
'name': name,
'greeting': greeting,
'context': context,
}
data = {k: v for k, v in data.items() if v} # Strip falsy
filepath = Path(f'{folder}/{filename}.yaml')
with filepath.open('w') as f:
yaml.dump(data, f, sort_keys=False)
logger.info(f'Wrote {filepath}')
path_to_img = Path(f'{folder}/{filename}.png')
if picture and not instruct:
picture.save(path_to_img)
logger.info(f'Wrote {path_to_img}')
elif path_to_img.exists():
delete_file(path_to_img)
def delete_character(name, instruct=False):
folder = 'characters' if not instruct else 'characters/instruction-following'
for extension in ["yml", "yaml", "json"]:
delete_file(Path(f'{folder}/{name}.{extension}'))
delete_file(Path(f'{folder}/{name}.png'))