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import csv
import fnmatch
import os
import os.path
import typing
import shutil
class PromptStyle(typing.NamedTuple):
name: str
prompt: str
negative_prompt: str
path: str = None
def merge_prompts(style_prompt: str, prompt: str) -> str:
if "{prompt}" in style_prompt:
res = style_prompt.replace("{prompt}", prompt)
else:
parts = filter(None, (prompt.strip(), style_prompt.strip()))
res = ", ".join(parts)
return res
def apply_styles_to_prompt(prompt, styles):
for style in styles:
prompt = merge_prompts(style, prompt)
return prompt
def unwrap_style_text_from_prompt(style_text, prompt):
"""
Checks the prompt to see if the style text is wrapped around it. If so,
returns True plus the prompt text without the style text. Otherwise, returns
False with the original prompt.
Note that the "cleaned" version of the style text is only used for matching
purposes here. It isn't returned; the original style text is not modified.
"""
stripped_prompt = prompt
stripped_style_text = style_text
if "{prompt}" in stripped_style_text:
# Work out whether the prompt is wrapped in the style text. If so, we
# return True and the "inner" prompt text that isn't part of the style.
try:
left, right = stripped_style_text.split("{prompt}", 2)
except ValueError as e:
# If the style text has multple "{prompt}"s, we can't split it into
# two parts. This is an error, but we can't do anything about it.
print(f"Unable to compare style text to prompt:\n{style_text}")
print(f"Error: {e}")
return False, prompt
if stripped_prompt.startswith(left) and stripped_prompt.endswith(right):
prompt = stripped_prompt[len(left) : len(stripped_prompt) - len(right)]
return True, prompt
else:
# Work out whether the given prompt ends with the style text. If so, we
# return True and the prompt text up to where the style text starts.
if stripped_prompt.endswith(stripped_style_text):
prompt = stripped_prompt[: len(stripped_prompt) - len(stripped_style_text)]
if prompt.endswith(", "):
prompt = prompt[:-2]
return True, prompt
return False, prompt
def extract_original_prompts(style: PromptStyle, prompt, negative_prompt):
"""
Takes a style and compares it to the prompt and negative prompt. If the style
matches, returns True plus the prompt and negative prompt with the style text
removed. Otherwise, returns False with the original prompt and negative prompt.
"""
if not style.prompt and not style.negative_prompt:
return False, prompt, negative_prompt
match_positive, extracted_positive = unwrap_style_text_from_prompt(
style.prompt, prompt
)
if not match_positive:
return False, prompt, negative_prompt
match_negative, extracted_negative = unwrap_style_text_from_prompt(
style.negative_prompt, negative_prompt
)
if not match_negative:
return False, prompt, negative_prompt
return True, extracted_positive, extracted_negative
class StyleDatabase:
def __init__(self, path: str):
self.no_style = PromptStyle("None", "", "", None)
self.styles = {}
self.path = path
folder, file = os.path.split(self.path)
filename, _, ext = file.partition('*')
self.default_path = os.path.join(folder, filename + ext)
self.prompt_fields = [field for field in PromptStyle._fields if field != "path"]
self.reload()
def reload(self):
"""
Clears the style database and reloads the styles from the CSV file(s)
matching the path used to initialize the database.
"""
self.styles.clear()
path, filename = os.path.split(self.path)
if "*" in filename:
fileglob = filename.split("*")[0] + "*.csv"
filelist = []
for file in os.listdir(path):
if fnmatch.fnmatch(file, fileglob):
filelist.append(file)
# Add a visible divider to the style list
half_len = round(len(file) / 2)
divider = f"{'-' * (20 - half_len)} {file.upper()}"
divider = f"{divider} {'-' * (40 - len(divider))}"
self.styles[divider] = PromptStyle(
f"{divider}", None, None, "do_not_save"
)
# Add styles from this CSV file
self.load_from_csv(os.path.join(path, file))
if len(filelist) == 0:
print(f"No styles found in {path} matching {fileglob}")
return
elif not os.path.exists(self.path):
print(f"Style database not found: {self.path}")
return
else:
self.load_from_csv(self.path)
def load_from_csv(self, path: str):
with open(path, "r", encoding="utf-8-sig", newline="") as file:
reader = csv.DictReader(file, skipinitialspace=True)
for row in reader:
# Ignore empty rows or rows starting with a comment
if not row or row["name"].startswith("#"):
continue
# Support loading old CSV format with "name, text"-columns
prompt = row["prompt"] if "prompt" in row else row["text"]
negative_prompt = row.get("negative_prompt", "")
# Add style to database
self.styles[row["name"]] = PromptStyle(
row["name"], prompt, negative_prompt, path
)
def get_style_paths(self) -> set:
"""Returns a set of all distinct paths of files that styles are loaded from."""
# Update any styles without a path to the default path
for style in list(self.styles.values()):
if not style.path:
self.styles[style.name] = style._replace(path=self.default_path)
# Create a list of all distinct paths, including the default path
style_paths = set()
style_paths.add(self.default_path)
for _, style in self.styles.items():
if style.path:
style_paths.add(style.path)
# Remove any paths for styles that are just list dividers
style_paths.discard("do_not_save")
return style_paths
def get_style_prompts(self, styles):
return [self.styles.get(x, self.no_style).prompt for x in styles]
def get_negative_style_prompts(self, styles):
return [self.styles.get(x, self.no_style).negative_prompt for x in styles]
def apply_styles_to_prompt(self, prompt, styles):
return apply_styles_to_prompt(
prompt, [self.styles.get(x, self.no_style).prompt for x in styles]
)
def apply_negative_styles_to_prompt(self, prompt, styles):
return apply_styles_to_prompt(
prompt, [self.styles.get(x, self.no_style).negative_prompt for x in styles]
)
def save_styles(self, path: str = None) -> None:
# The path argument is deprecated, but kept for backwards compatibility
_ = path
style_paths = self.get_style_paths()
csv_names = [os.path.split(path)[1].lower() for path in style_paths]
for style_path in style_paths:
# Always keep a backup file around
if os.path.exists(style_path):
shutil.copy(style_path, f"{style_path}.bak")
# Write the styles to the CSV file
with open(style_path, "w", encoding="utf-8-sig", newline="") as file:
writer = csv.DictWriter(file, fieldnames=self.prompt_fields)
writer.writeheader()
for style in (s for s in self.styles.values() if s.path == style_path):
# Skip style list dividers, e.g. "STYLES.CSV"
if style.name.lower().strip("# ") in csv_names:
continue
# Write style fields, ignoring the path field
writer.writerow(
{k: v for k, v in style._asdict().items() if k != "path"}
)
def extract_styles_from_prompt(self, prompt, negative_prompt):
extracted = []
applicable_styles = list(self.styles.values())
while True:
found_style = None
for style in applicable_styles:
is_match, new_prompt, new_neg_prompt = extract_original_prompts(
style, prompt, negative_prompt
)
if is_match:
found_style = style
prompt = new_prompt
negative_prompt = new_neg_prompt
break
if not found_style:
break
applicable_styles.remove(found_style)
extracted.append(found_style.name)
return list(reversed(extracted)), prompt, negative_prompt
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