5 files changed, 496 insertions, 0 deletions
diff --git a/src/gpt_chat_cli/__init__.py b/src/gpt_chat_cli/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/gpt_chat_cli/__init__.py
diff --git a/src/gpt_chat_cli/argparsing.py b/src/gpt_chat_cli/argparsing.py
new file mode 100644
index 0000000..a7d3218
--- /dev/null
+++ b/src/gpt_chat_cli/argparsing.py
@@ -0,0 +1,193 @@
+import argparse
+import os
+import logging
+import openai
+import sys
+from enum import Enum
+
+class AutoDetectedOption(Enum):
+    ON = 'on'
+    OFF = 'off'
+    AUTO = 'auto'
+
+def die_validation_err(err : str):
+    print(err, file=sys.stderr)
+    sys.exit(1)
+
+def validate_args(args: argparse.Namespace) -> None:
+    if not 0 <= args.temperature <= 2:
+        die_validation_err("Temperature must be between 0 and 2.")
+
+    if not -2 <= args.frequency_penalty <= 2:
+        die_validation_err("Frequency penalty must be between -2.0 and 2.0.")
+
+    if not -2 <= args.presence_penalty <= 2:
+        die_validation_err("Presence penalty must be between -2.0 and 2.0.")
+
+    if args.max_tokens < 1:
+        die_validation_err("Max tokens must be greater than or equal to 1.")
+
+    if not 0 <= args.top_p <= 1:
+        die_validation_err("Top_p must be between 0 and 1.")
+
+    if args.n_completions < 1:
+        die_validation_err("Number of completions must be greater than or equal to 1.")
+
+def parse_args():
+
+    GCLI_ENV_PREFIX = "GCLI_"
+
+    debug = os.getenv(f'{GCLI_ENV_PREFIX}DEBUG') is not None
+
+    if debug:
+        logging.warning("Debugging mode and unstable features have been enabled.")
+
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument(
+        "-m",
+        "--model",
+        default=os.getenv(f'{GCLI_ENV_PREFIX}MODEL', "gpt-3.5-turbo"),
+        help="ID of the model to use",
+    )
+
+    parser.add_argument(
+        "-t",
+        "--temperature",
+        type=float,
+        default=os.getenv(f'{GCLI_ENV_PREFIX}TEMPERATURE', 0.5),
+        help=(
+            "What sampling temperature to use, between 0 and 2. Higher values "
+            "like 0.8 will make the output more random, while lower values "
+            "like 0.2 will make it more focused and deterministic."
+        ),
+    )
+
+    parser.add_argument(
+        "-f",
+        "--frequency-penalty",
+        type=float,
+        default=os.getenv(f'{GCLI_ENV_PREFIX}FREQUENCY_PENALTY', 0),
+        help=(
+            "Number between -2.0 and 2.0. Positive values penalize new tokens based "
+            "on their existing frequency in the text so far, decreasing the model's "
+            "likelihood to repeat the same line verbatim."
+        ),
+    )
+
+    parser.add_argument(
+        "-p",
+        "--presence-penalty",
+        type=float,
+        default=os.getenv(f'{GCLI_ENV_PREFIX}PRESENCE_PENALTY', 0),
+        help=(
+            "Number between -2.0 and 2.0. Positive values penalize new tokens based "
+            "on whether they appear in the text so far, increasing the model's "
+            "likelihood to talk about new topics."
+        ),
+    )
+
+    parser.add_argument(
+        "-k",
+        "--max-tokens",
+        type=int,
+        default=os.getenv(f'{GCLI_ENV_PREFIX}MAX_TOKENS', 2048),
+        help=(
+            "The maximum number of tokens to generate in the chat completion. "
+            "Defaults to 2048."
+        ),
+    )
+
+    parser.add_argument(
+        "-s",
+        "--top-p",
+        type=float,
+        default=os.getenv(f'{GCLI_ENV_PREFIX}TOP_P', 1),
+        help=(
+            "An alternative to sampling with temperature, called nucleus sampling, "
+            "where the model considers the results of the tokens with top_p "
+            "probability mass. So 0.1 means only the tokens comprising the top 10%% "
+            "probability mass are considered."
+        ),
+    )
+
+    parser.add_argument(
+        "-n",
+        "--n-completions",
+        type=int,
+        default=os.getenv('f{GCLI_ENV_PREFIX}N_COMPLETIONS', 1),
+        help="How many chat completion choices to generate for each input message.",
+    )
+
+    parser.add_argument(
+        "--adornments",
+        type=AutoDetectedOption,
+        choices=list(AutoDetectedOption),
+        default=AutoDetectedOption.AUTO,
+        help=(
+            "Show adornments to indicate the model and response."
+            " Can be set to 'on', 'off', or 'auto'."
+        )
+    )
+
+    parser.add_argument(
+        "--color",
+        type=AutoDetectedOption,
+        choices=list(AutoDetectedOption),
+        default=AutoDetectedOption.AUTO,
+        help="Set color to 'on', 'off', or 'auto'.",
+    )
+
+    parser.add_argument(
+        "message",
+        type=str,
+        help=(
+            "The contents of the message. When used in chat mode, this is the initial "
+            "message if provided."
+        ),
+    )
+
+    if debug:
+        group = parser.add_mutually_exclusive_group()
+
+        group.add_argument(
+            '--save-response-to-file',
+            type=str,
+            help="UNSTABLE: save the response to a file. This can reply a response for debugging purposes",
+        )
+
+        group.add_argument(
+            '--load-response-from-file',
+            type=str,
+            help="UNSTABLE: load a response from a file. This can reply a response for debugging purposes",
+        )
+
+    openai_key = os.getenv("OPENAI_KEY", os.getenv("OPENAI_API_KEY"))
+    if not openai_key:
+        print("The OPENAI_API_KEY or OPENAI_KEY environment variable must be defined.", file=sys.stderr)
+        print("The OpenAI API uses API keys for authentication. Visit your (API Keys page)[https://platform.openai.com/account/api-keys] to retrieve the API key you'll use in your requests.", file=sys.stderr)
+        sys.exit(1)
+
+    openai.api_key = openai_key
+
+    args = parser.parse_args()
+
+    if debug and args.load_response_from_file:
+        logging.warning(f'Ignoring the provided arguments in favor of those provided when the response in {args.load_response_from_file} was generated')
+
+    if args.color == AutoDetectedOption.AUTO:
+        if os.getenv("NO_COLOR"):
+            args.color = AutoDetectedOption.OFF
+        else:
+            args.color = AutoDetectedOption.ON
+
+    if args.adornments == AutoDetectedOption.AUTO:
+        args.adornments = AutoDetectedOption.ON
+
+    if not debug:
+        args.load_response_from_file = None
+        args.save_response_to_file = None
+
+    validate_args(args)
+
+    return args
diff --git a/src/gpt_chat_cli/color.py b/src/gpt_chat_cli/color.py
new file mode 100644
index 0000000..ce1b182
--- /dev/null
+++ b/src/gpt_chat_cli/color.py
@@ -0,0 +1,92 @@
+from typing import Literal
+
+class ColorCode:
+    """A superclass to signal that color codes are strings"""
+
+    BLACK: Literal[str]
+    RED: Literal[str]
+    GREEN: Literal[str]
+    YELLOW: Literal[str]
+    BLUE: Literal[str]
+    MAGENTA: Literal[str]
+    CYAN: Literal[str]
+    WHITE: Literal[str]
+    RESET: Literal[str]
+
+    BLACK_BG: Literal[str]
+    RED_BG: Literal[str]
+    GREEN_BG: Literal[str]
+    YELLOW_BG: Literal[str]
+    BLUE_BG: Literal[str]
+    MAGENTA_BG: Literal[str]
+    CYAN_BG: Literal[str]
+    WHITE_BG: Literal[str]
+
+    BOLD: Literal[str]
+    UNDERLINE: Literal[str]
+    BLINK: Literal[str]
+
+
+class VT100ColorCode(ColorCode):
+    """A class containing VT100 color codes"""
+
+    # Define the color codes
+    BLACK = '\033[30m'
+    RED = '\033[31m'
+    GREEN = '\033[32m'
+    YELLOW = '\033[33m'
+    BLUE = '\033[34m'
+    MAGENTA = '\033[35m'
+    CYAN = '\033[36m'
+    WHITE = '\033[37m'
+    RESET = '\033[0m'
+
+    # Define the background color codes
+    BLACK_BG = '\033[40m'
+    RED_BG = '\033[41m'
+    GREEN_BG = '\033[42m'
+    YELLOW_BG = '\033[43m'
+    BLUE_BG = '\033[44m'
+    MAGENTA_BG = '\033[45m'
+    CYAN_BG = '\033[46m'
+    WHITE_BG = '\033[47m'
+
+    # Define the bold, underline and blink codes
+    BOLD = '\033[1m'
+    UNDERLINE = '\033[4m'
+    BLINK = '\033[5m'
+
+class NoColorColorCode(ColorCode):
+    """A class nullifying color codes to disable color"""
+
+    # Define the color codes
+    BLACK = ''
+    RED = ''
+    GREEN = ''
+    YELLOW = ''
+    BLUE = ''
+    MAGENTA = ''
+    CYAN = ''
+    WHITE = ''
+    RESET = ''
+
+    # Define the background color codes
+    BLACK_BG = ''
+    RED_BG = ''
+    GREEN_BG = ''
+    YELLOW_BG = ''
+    BLUE_BG = ''
+    MAGENTA_BG = ''
+    CYAN_BG = ''
+    WHITE_BG = ''
+
+    # Define the bold, underline and blink codes
+    BOLD = ''
+    UNDERLINE = ''
+    BLINK = ''
+
+def get_color_codes(no_color=False) -> ColorCode:
+    if no_color:
+        return NoColorColorCode
+    else:
+        return VT100ColorCode
diff --git a/src/gpt_chat_cli/gcli.py b/src/gpt_chat_cli/gcli.py
new file mode 100644
index 0000000..ded6d6c
--- /dev/null
+++ b/src/gpt_chat_cli/gcli.py
@@ -0,0 +1,142 @@
+#!/bin/env python3
+
+import argparse
+import sys
+import openai
+import pickle
+
+from collections import defaultdict
+from dataclasses import dataclass
+from typing import Tuple
+
+from .openai_wrappers import (
+    create_chat_completion,
+    OpenAIChatResponse,
+    OpenAIChatResponseStream,
+    FinishReason,
+)
+
+from .argparsing import (
+    parse_args,
+    AutoDetectedOption,
+)
+
+from .color import get_color_codes
+
+###########################
+####   SAVE / REPLAY   ####
+###########################
+
+def create_chat_completion_from_args(args : argparse.Namespace) \
+        -> OpenAIChatResponseStream:
+    return create_chat_completion(
+        model=args.model,
+        messages=[{ "role": "user", "content": args.message }],
+        n=args.n_completions,
+        temperature=args.temperature,
+        presence_penalty=args.presence_penalty,
+        frequency_penalty=args.frequency_penalty,
+        max_tokens=args.max_tokens,
+        top_p=args.top_p,
+        stream=True
+    )
+
+def save_response_and_arguments(args : argparse.Namespace) -> None:
+    completion = create_chat_completion_from_args(args)
+    completion = list(completion)
+
+    filename = args.save_response_to_file
+
+    with open(filename, 'wb') as f:
+        pickle.dump((args, completion,), f)
+
+def load_response_and_arguments(args : argparse.Namespace) \
+        -> Tuple[argparse.Namespace, OpenAIChatResponseStream]:
+
+    filename = args.load_response_from_file
+
+    with open(filename, 'rb') as f:
+        args, completion = pickle.load(f)
+
+    return (args, completion)
+
+#########################
+#### PRETTY PRINTING ####
+#########################
+
+@dataclass
+class CumulativeResponse:
+    content: str = ""
+    finish_reason: FinishReason = FinishReason.NONE
+
+    def take_content(self : "CumulativeResponse"):
+        chunk = self.content
+        self.content = ""
+        return chunk
+
+def print_streamed_response(args : argparse.Namespace, completion : OpenAIChatResponseStream):
+    """
+    Print the response in real time by printing the deltas as they occur. If multiple responses
+    are requested, print the first in real-time, accumulating the others in the background. One the
+    first response completes, move on to the second response printing the deltas in real time. Continue
+    on until all responses have been printed.
+    """
+
+    COLOR_CODE = get_color_codes(no_color = args.color == AutoDetectedOption.OFF)
+    ADORNMENTS = args.adornments == AutoDetectedOption.ON
+    N_COMPLETIONS = args.n_completions
+
+    cumu_responses = defaultdict(CumulativeResponse)
+    display_idx = 0
+    prompt_printed = False
+
+    for update in completion:
+
+        for choice in update.choices:
+            delta = choice.delta
+
+            if delta.content:
+                cumu_responses[choice.index].content += delta.content
+
+            if choice.finish_reason is not FinishReason.NONE:
+                cumu_responses[choice.index].finish_reason = choice.finish_reason
+
+        display_response = cumu_responses[display_idx]
+
+        if not prompt_printed and ADORNMENTS:
+            res_indicator = '' if N_COMPLETIONS == 1 else \
+                    f' {display_idx + 1}/{n_completions}'
+            PROMPT = f'[{COLOR_CODE.GREEN}{update.model}{COLOR_CODE.RESET}{COLOR_CODE.RED}{res_indicator}{COLOR_CODE.RESET}]'
+            prompt_printed = True
+            print(PROMPT, end=' ', flush=True)
+
+
+        content = display_response.take_content()
+        print(f'{COLOR_CODE.WHITE}{content}{COLOR_CODE.RESET}',
+              sep='', end='', flush=True)
+
+        if display_response.finish_reason is not FinishReason.NONE:
+            if display_idx < N_COMPLETIONS:
+                display_idx += 1
+                prompt_printed = False
+
+            if ADORNMENTS:
+                print(end='\n\n', flush=True)
+            else:
+                print(end='\n', flush=True)
+
+def main():
+    args = parse_args()
+
+    if args.save_response_to_file:
+        save_response_and_arguments(args)
+        return
+    elif args.load_response_from_file:
+        args, completion = load_response_and_arguments(args)
+    else:
+        completion = create_chat_completion_from_args(args)
+
+    print_streamed_response(args, completion)
+
+if __name__ == "__main__":
+    main()
diff --git a/src/gpt_chat_cli/openai_wrappers.py b/src/gpt_chat_cli/openai_wrappers.py
new file mode 100644
index 0000000..784a9ce
--- /dev/null
+++ b/src/gpt_chat_cli/openai_wrappers.py
@@ -0,0 +1,69 @@
+import json
+import openai
+
+from typing import Any, List, Optional, Generator
+from dataclasses import dataclass
+from enum import Enum, auto
+
+@dataclass
+class Delta:
+    content: Optional[str] = None
+    role: Optional[str] = None
+
+class FinishReason(Enum):
+    STOP = auto()
+    MAX_TOKENS = auto()
+    TEMPERATURE = auto()
+    NONE = auto()
+
+    @staticmethod
+    def from_str(finish_reason_str : Optional[str]) -> "FinishReason":
+        if finish_reason_str is None:
+            return FinishReason.NONE
+        return FinishReason[finish_reason_str.upper()]
+
+@dataclass
+class Choice:
+    delta: Delta
+    finish_reason: Optional[FinishReason]
+    index: int
+
+@dataclass
+class OpenAIChatResponse:
+    choices: List[Choice]
+    created: int
+    id: str
+    model: str
+    object: str
+
+    def from_json(data: Any) -> "OpenAIChatResponse":
+        choices = []
+
+        for choice in data["choices"]:
+            delta = Delta(
+                content=choice["delta"].get("content"),
+                role=choice["delta"].get("role")
+            )
+
+            choices.append(Choice(
+                delta=delta,
+                finish_reason=FinishReason.from_str(choice["finish_reason"]),
+                index=choice["index"],
+            ))
+
+        return OpenAIChatResponse(
+            choices,
+            created=data["created"],
+            id=data["id"],
+            model=data["model"],
+            object=data["object"],
+        )
+
+OpenAIChatResponseStream = Generator[OpenAIChatResponse, None, None]
+
+def create_chat_completion(*args, **kwargs) \
+        -> OpenAIChatResponseStream:
+    return (
+        OpenAIChatResponse.from_json(update) \
+        for update in  openai.ChatCompletion.create(*args, **kwargs)
+    )