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handlebars_system_helpers.py
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handlebars_system_helpers.py
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# Copyright (c) Microsoft. All rights reserved.
import json
import logging
import re
from enum import Enum
from typing import Callable, Dict
logger: logging.Logger = logging.getLogger(__name__)
def _messages(this, options, *args, **kwargs):
from semantic_kernel.contents.chat_history import ChatHistory
if not isinstance(this.context["chat_history"], ChatHistory):
return ""
return str(this.context["chat_history"])
def _message_to_prompt(this, *args, **kwargs):
from semantic_kernel.contents.chat_message_content import ChatMessageContent
if isinstance(this.context, ChatMessageContent):
return str(this.context.to_prompt())
return str(this.context)
def _message(this, options, *args, **kwargs):
from semantic_kernel.contents.const import CHAT_MESSAGE_CONTENT_TAG
# everything in kwargs, goes to <ROOT_KEY_MESSAGE kwargs_key="kwargs_value">
# everything in options, goes in between <ROOT_KEY_MESSAGE>options</ROOT_KEY_MESSAGE>
start = f"<{CHAT_MESSAGE_CONTENT_TAG}"
for key, value in kwargs.items():
if isinstance(value, Enum):
value = value.value
if value is not None:
start += f' {key}="{value}"'
start += ">"
end = f"</{CHAT_MESSAGE_CONTENT_TAG}>"
try:
content = options["fn"](this)
except Exception:
content = ""
return f"{start}{content}{end}"
def _set(this, *args, **kwargs):
if "name" in kwargs and "value" in kwargs:
this.context[kwargs["name"]] = kwargs["value"]
if len(args) == 2 and isinstance(args[0], str):
this.context[args[0]] = args[1]
return ""
def _get(this, *args, **kwargs):
if len(args) == 0:
return ""
return this.context.get(args[0], "")
def _array(this, *args, **kwargs):
return list(args)
def _range(this, *args, **kwargs):
args = list(args)
for index, arg in enumerate(args):
if not isinstance(arg, int):
try:
args[index] = int(arg)
except ValueError:
args.pop(index)
if len(args) == 1:
return list(range(args[0]))
if len(args) == 2:
return list(range(args[0], args[1]))
if len(args) == 3:
return list(range(args[0], args[1], args[2]))
return []
def _concat(this, *args, **kwargs):
return "".join([str(value) for value in args])
def _or(this, *args, **kwargs):
return any(args)
def _add(this, *args, **kwargs):
return sum([float(value) for value in args])
def _subtract(this, *args, **kwargs):
return float(args[0]) - sum([float(value) for value in args[1:]])
def _equals(this, *args, **kwargs):
return args[0] == args[1]
def _less_than(this, *args, **kwargs):
return float(args[0]) < float(args[1])
def _greater_than(this, *args, **kwargs):
return float(args[0]) > float(args[1])
def _less_than_or_equal(this, *args, **kwargs):
return float(args[0]) <= float(args[1])
def _greater_than_or_equal(this, *args, **kwargs):
return float(args[0]) >= float(args[1])
def _json(this, *args, **kwargs):
if not args:
return ""
return json.dumps(args[0])
def _double_open(this, *args, **kwargs):
return "{{"
def _double_close(this, *args, **kwargs):
return "}}"
def _camel_case(this, *args, **kwargs):
return "".join([word.capitalize() for word in args[0].split("_")])
def _snake_case(this, *args, **kwargs):
arg = args[0]
arg = re.sub(r"([A-Z]+)([A-Z][a-z])", r"\1_\2", arg)
arg = re.sub(r"([a-z\d])([A-Z])", r"\1_\2", arg)
arg = arg.replace("-", "_")
return arg.lower()
HANDLEBAR_SYSTEM_HELPERS: Dict[str, Callable] = {
"set": _set,
"get": _get,
"array": _array,
"range": _range,
"concat": _concat,
"or": _or,
"add": _add,
"subtract": _subtract,
"equals": _equals,
"less_than": _less_than,
"lessThan": _less_than,
"greater_than": _greater_than,
"greaterThan": _greater_than,
"less_than_or_equal": _less_than_or_equal,
"lessThanOrEqual": _less_than_or_equal,
"greater_than_or_equal": _greater_than_or_equal,
"greaterThanOrEqual": _greater_than_or_equal,
"json": _json,
"double_open": _double_open,
"doubleOpen": _double_open,
"double_close": _double_close,
"doubleClose": _double_close,
"camel_case": _camel_case,
"camelCase": _camel_case,
"snake_case": _snake_case,
"snakeCase": _snake_case,
"message": _message,
"message_to_prompt": _message_to_prompt,
"messageToPrompt": _message_to_prompt,
"messages": _messages,
}