app.py

import gradio as gr
import json
import io
import boto3
import base64
from PIL import Image

from settings_mgr import generate_download_settings_js, generate_upload_settings_js
from llm import LLM, log_to_console
from code_exec import eval_restricted_script
from botocore.config import Config

dump_controls = False

def dump(history):
    return str(history)

def load_settings():  
    # Dummy Python function, actual loading is done in JS  
    pass  

def save_settings(acc, sec, prompt, temp):  
    # Dummy Python function, actual saving is done in JS  
    pass  

def process_values_js():
    return """

    () => {

        return ["access_key", "secret_key", "token"];

    }

    """

def bot(message, history, aws_access, aws_secret, aws_token, system_prompt, temperature, max_tokens, model: str, region, python_use):
    try:
        llm = LLM.create_llm(model)
        messages = llm.generate_body(message, history)
        sys_prompt = [{"text": system_prompt}] if system_prompt else []

        config = Config(
            read_timeout = 600,
            connect_timeout = 30,
            retries = {'max_attempts': 10, 'mode': 'adaptive'}
        )

        tool_config = {
            "tools": [{
                "toolSpec": {
                    "name": "eval_python",
                    "description": "Evaluate a simple script written in a conservative, restricted subset of Python."
                                "Note: Augmented assignments, in-place operations (e.g., +=, -=), lambdas (e.g. list comprehensions) are not supported. "
                                "Use regular assignments and operations instead. Only 'import math' is allowed. "
                                "Returns: unquoted results without HTML encoding.",
                    "inputSchema": {
                        "json": {
                            "type": "object",
                            "properties": {
                                "script": {
                                    "type": "string",
                                    "description": "The Python script that will run in a RestrictedPython context. "
                                                "Avoid using augmented assignments or in-place operations (+=, -=, etc.), as well as lambdas (e.g. list comprehensions). "
                                                "Use regular assignments and operations instead. Only 'import math' is allowed."
                                }
                            },
                            "required": ["script"]
                        }
                    }
                }
            }]
        } if python_use else None

        sess = boto3.Session(
            aws_access_key_id = aws_access,
            aws_secret_access_key = aws_secret,
            aws_session_token = aws_token,
            region_name = region)
        br = sess.client(service_name="bedrock-runtime", config = config)

        whole_response = ""
        while True:
            response = br.converse_stream(
                modelId = model,
                messages = messages,
                system = sys_prompt,
                inferenceConfig = {
                    "temperature": temperature,
                    "maxTokens": max_tokens,
                },
                **({'toolConfig': tool_config} if python_use else {})
            )

            for stop_reason, message in llm.read_response(response.get('stream')):
                if isinstance(message, str):
                    whole_response += message
                    yield whole_response

                if stop_reason:
                    if stop_reason == "tool_use":
                        messages.append(message)

                        for content in message['content']:
                            if 'toolUse' in content:
                                tool = content['toolUse']

                                if tool['name'] == 'eval_python':
                                    tool_result = {}
                                    try:
                                        tool_script = tool["input"]["script"]

                                        whole_response += f"\n``` script\n{tool_script}\n```\n"
                                        yield whole_response

                                        tool_result = eval_restricted_script(tool_script)
                                        tool_result_message = {
                                            "role": "user",
                                            "content": [
                                                {
                                                    "toolResult": {
                                                        "toolUseId": tool['toolUseId'],
                                                        "content": [{"json": tool_result }]
                                                    }
                                                }
                                            ]
                                        }

                                        whole_response += f"\n``` result\n{tool_result if not tool_result['success'] else tool_result['prints']}\n```\n"
                                        yield whole_response
                                    except Exception as e:
                                        tool_result_message = {
                                            "role": "user",
                                            "content": [
                                                {
                                                    "toolResult": {
                                                        "content": [{"text":  e.args[0]}],
                                                        "status": 'error'
                                                    }
                                                }
                                            ]
                                        }
                                        whole_response += f"\n``` error\n{e.args[0]}\n```\n"
                                        yield whole_response

                                    messages.append(tool_result_message)
                    else:
                        return

    except Exception as e:
        raise gr.Error(f"Error: {str(e)}")

def import_history(history, file):
    with open(file.name, mode="rb") as f:
        content = f.read()

        if isinstance(content, bytes):
            content = content.decode('utf-8', 'replace')
        else:
            content = str(content)

    # Deserialize the JSON content
    import_data = json.loads(content)

    # Check if 'history' key exists for backward compatibility
    if 'history' in import_data:
        history = import_data['history']
        system_prompt_value = import_data.get('system_prompt', '')  # Set default if not present
    else:
        # Assume it's an old format with only history data
        history = import_data
        system_prompt_value = ''

    # Process the history to handle image data
    processed_history = []
    for pair in history:
        processed_pair = []
        for message in pair:
            if isinstance(message, dict) and 'file' in message and 'data' in message['file']:
                # Create a gradio.Image from the base64 data
                image_data = base64.b64decode(message['file']['data'].split(',')[1])
                img = Image.open(io.BytesIO(image_data))
                gr_image = gr.Image(img)
                processed_pair.append(gr_image)

                gr.Warning("Reusing images across sessions is limited to one conversation turn")
            else:
                processed_pair.append(message)
        processed_history.append(processed_pair)

    return processed_history, system_prompt_value

def export_history(h, s):
    pass

with gr.Blocks(delete_cache=(86400, 86400)) as demo:
    gr.Markdown("# Amazon™️ Bedrock™️ Chat™️ (Nils' Version™️) feat. Mistral™️ AI & Anthropic™️ Claude™️")

    with gr.Accordion("Startup"):
        gr.Markdown("""Use of this interface permitted under the terms and conditions of the 

                    [MIT license](https://github.com/ndurner/amz_bedrock_chat/blob/main/LICENSE).

                    Third party terms and conditions apply, particularly

                    those of the LLM vendor (AWS) and hosting provider (Hugging Face). This software and the AI models may make mistakes, so verify all outputs.""")
        
        aws_access = gr.Textbox(label="AWS Access Key", elem_id="aws_access")
        aws_secret = gr.Textbox(label="AWS Secret Key", elem_id="aws_secret")
        aws_token = gr.Textbox(label="AWS Session Token", elem_id="aws_token")
        model = gr.Dropdown(label="Model", value="anthropic.claude-3-5-sonnet-20241022-v2:0", allow_custom_value=True, elem_id="model",
                            choices=["anthropic.claude-3-5-sonnet-20240620-v1:0", "anthropic.claude-3-opus-20240229-v1:0", "meta.llama3-1-405b-instruct-v1:0", "anthropic.claude-3-sonnet-20240229-v1:0", "anthropic.claude-3-haiku-20240307-v1:0", "anthropic.claude-v2:1", "anthropic.claude-v2",
                                     "mistral.mistral-7b-instruct-v0:2", "mistral.mixtral-8x7b-instruct-v0:1", "mistral.mistral-large-2407-v1:0", "anthropic.claude-3-5-sonnet-20241022-v2:0"])
        system_prompt = gr.TextArea("You are a helpful yet diligent AI assistant. Answer faithfully and factually correct. Respond with 'I do not know' if uncertain.", label="System Prompt", lines=3, max_lines=250, elem_id="system_prompt")  
        region = gr.Dropdown(label="Region", value="us-west-2", allow_custom_value=True, elem_id="region",
                            choices=["eu-central-1", "eu-west-3", "us-east-1", "us-west-1", "us-west-2"])
        temp = gr.Slider(0, 1, label="Temperature", elem_id="temp", value=1)
        max_tokens = gr.Slider(1, 8192, label="Max. Tokens", elem_id="max_tokens", value=4096)
        python_use = gr.Checkbox(label="Python Use")
        save_button = gr.Button("Save Settings")  
        load_button = gr.Button("Load Settings")  
        dl_settings_button = gr.Button("Download Settings")
        ul_settings_button = gr.Button("Upload Settings")

        load_button.click(load_settings, js="""  

            () => {  

                let elems = ['#aws_access textarea', '#aws_secret textarea', '#aws_token textarea', '#system_prompt textarea', '#temp input', '#max_tokens input', '#model', '#region'];

                elems.forEach(elem => {

                    let item = document.querySelector(elem);

                    let event = new InputEvent('input', { bubbles: true });

                    item.value = localStorage.getItem(elem.split(" ")[0].slice(1)) || '';

                    item.dispatchEvent(event);

                });

            }  

        """)

        save_button.click(save_settings, [aws_access, aws_secret, aws_token, system_prompt, temp, max_tokens, model, region], js="""  

            (acc, sec, tok, system_prompt, temp, ntok, model, region) => {  

                localStorage.setItem('aws_access', acc);  

                localStorage.setItem('aws_secret', sec);  

                localStorage.setItem('aws_token', tok);  

                localStorage.setItem('system_prompt', system_prompt);

                localStorage.setItem('temp', document.querySelector('#temp input').value);  

                localStorage.setItem('max_tokens', document.querySelector('#max_tokens input').value);  

                localStorage.setItem('model', model);  

                localStorage.setItem('region', region);  

            }  

        """) 

        control_ids = [('aws_access', '#aws_access textarea'),
                       ('aws_secret', '#aws_secret textarea'),
                       ('aws_token', '#aws_token textarea'),
                       ('system_prompt', '#system_prompt textarea'),
                       ('temp', '#temp input'),
                       ('max_tokens', '#max_tokens input'),
                       ('model', '#model'),
                       ('region', '#region')]
        controls = [aws_access, aws_secret, aws_token, system_prompt, temp, max_tokens, model, region, python_use]

        dl_settings_button.click(None, controls, js=generate_download_settings_js("amz_chat_settings.bin", control_ids))
        ul_settings_button.click(None, None, None, js=generate_upload_settings_js(control_ids))

    chat = gr.ChatInterface(fn=bot, multimodal=True, additional_inputs=controls, autofocus = False)
    chat.textbox.file_count = "multiple"
    chatbot = chat.chatbot
    chatbot.show_copy_button = True
    chatbot.height = 450

    if dump_controls:
        with gr.Row():
            dmp_btn = gr.Button("Dump")
            txt_dmp = gr.Textbox("Dump")
            dmp_btn.click(dump, inputs=[chatbot], outputs=[txt_dmp])

    with gr.Accordion("Import/Export", open = False):
        import_button = gr.UploadButton("History Import")
        export_button = gr.Button("History Export")
        export_button.click(export_history, [chatbot, system_prompt], js="""

            async (chat_history, system_prompt) => {

                console.log('Chat History:', JSON.stringify(chat_history, null, 2));



                async function fetchAndEncodeImage(url) {

                    const response = await fetch(url);

                    const blob = await response.blob();

                    return new Promise((resolve, reject) => {

                        const reader = new FileReader();

                        reader.onloadend = () => resolve(reader.result);

                        reader.onerror = reject;

                        reader.readAsDataURL(blob);

                    });

                }



                const processedHistory = await Promise.all(chat_history.map(async (pair) => {

                    return await Promise.all(pair.map(async (message) => {

                        if (message && message.file && message.file.url) {

                            const base64Image = await fetchAndEncodeImage(message.file.url);

                            return {

                                ...message,

                                file: {

                                    ...message.file,

                                    data: base64Image

                                }

                            };

                        }

                        return message;

                    }));

                }));



                const export_data = {

                    history: processedHistory,

                    system_prompt: system_prompt

                };

                const history_json = JSON.stringify(export_data);

                const blob = new Blob([history_json], {type: 'application/json'});

                const url = URL.createObjectURL(blob);

                const a = document.createElement('a');

                a.href = url;

                a.download = 'chat_history.json';

                document.body.appendChild(a);

                a.click();

                document.body.removeChild(a);

                URL.revokeObjectURL(url);

            }

        """)
        dl_button = gr.Button("File download")
        dl_button.click(lambda: None, [chatbot], js="""

            (chat_history) => {

                // Only define exception mappings

                const languageToExt = {

                    'python': 'py',

                    'javascript': 'js',

                    'typescript': 'ts',

                    'csharp': 'cs',

                    'ruby': 'rb',

                    'shell': 'sh',

                    'bash': 'sh',

                    'markdown': 'md',

                    'yaml': 'yml',

                    'rust': 'rs',

                    'golang': 'go',

                    'kotlin': 'kt'

                };



                const contentRegex = /```(?:([^\\n]+)?\\n)?([\\s\\S]*?)```/;

                const match = contentRegex.exec(chat_history[chat_history.length - 1][1]);

                

                if (match && match[2]) {

                    const specifier = match[1] ? match[1].trim() : '';

                    const content = match[2];

                    

                    let filename = 'download';

                    let fileExtension = 'txt'; // default



                    if (specifier) {

                        if (specifier.includes('.')) {

                            // If specifier contains a dot, treat it as a filename

                            const parts = specifier.split('.');

                            filename = parts[0];

                            fileExtension = parts[1];

                        } else {

                            // Use mapping if exists, otherwise use specifier itself

                            const langLower = specifier.toLowerCase();

                            fileExtension = languageToExt[langLower] || langLower;

                            filename = 'code';

                        }

                    }



                    const blob = new Blob([content], {type: 'text/plain'});

                    const url = URL.createObjectURL(blob);

                    const a = document.createElement('a');

                    a.href = url;

                    a.download = `${filename}.${fileExtension}`;

                    document.body.appendChild(a);

                    a.click();

                    document.body.removeChild(a);

                    URL.revokeObjectURL(url);

                }

            }

        """)
        import_button.upload(import_history, inputs=[chatbot, import_button], outputs=[chatbot, system_prompt])

demo.queue().launch()