app.py

# pip install imgkit
# pip install html2image
import base64
import random
import uuid
from io import BytesIO

import imgkit
import os
import pathlib
import re
import gradio as gr
import requests
from PIL import Image
from gradio_client import Client
import torch
from transformers import AutoModelForSpeechSeq2Seq, AutoProcessor, pipeline, Pipeline

HF_TOKEN = os.getenv("HF_TOKEN")

if not HF_TOKEN:
    raise Exception("HF_TOKEN environment variable is required to call remote API.")

API_URL = "https://api-inference.huggingface.co/models/HuggingFaceH4/zephyr-7b-beta"
headers = {"Authorization": f"Bearer {HF_TOKEN}"}

client = Client("https://latent-consistency-super-fast-lcm-lora-sd1-5.hf.space/--replicas/08676bwq2/")


def init_speech_to_text_model() -> Pipeline:
    device = "cuda:0" if torch.cuda.is_available() else "cpu"
    torch_dtype = torch.float16 if torch.cuda.is_available() else torch.float32

    model_id = "distil-whisper/distil-medium.en"
    model = AutoModelForSpeechSeq2Seq.from_pretrained(
        model_id, torch_dtype=torch_dtype, low_cpu_mem_usage=True, use_safetensors=True
    )
    model.to(device)
    processor = AutoProcessor.from_pretrained(model_id)
    return pipeline(
        "automatic-speech-recognition",
        model=model,
        tokenizer=processor.tokenizer,
        feature_extractor=processor.feature_extractor,
        max_new_tokens=128,
        torch_dtype=torch_dtype,
        device=device,
    )


whisper_pipe = init_speech_to_text_model()


def query(payload: dict):
    response = requests.post(API_URL, headers=headers, json=payload)
    return response.json()


def generate_text(card_text: str, user_request: str) -> (str, str, str):
    # Prompt must apply the correct chat template for the model see:
    # https://huggingface.co/docs/transformers/main/en/chat_templating
    prompt = f"""<|system|>
You create Magic the Gathering cards based on the user's request.
# RULES
- In your response always generate a new card.
- Only generate one card, no other dialogue.
- Surround card info in triple backticks (```).
- Format the card text using headers like in the example below:
```
Name: Band of Brothers
ManaCost: {{3}}{{W}}{{W}}
Type: Creature — Phyrexian Human Soldier
Rarity: rare
Text: Vigilance
{{W}}, {{T}}: Attach target creature you control to target creature. (Any number of attacking creatures with total power 5 or less can attack in a band. A band deals damage to that creature.)
FlavorText: "This time we will be stronger."
—Elder brotherhood blessing
Power: 2
Toughness: 2
Color: ['W']
```</s>
<|user|>
{user_request}
<|assistant|>
"""
    if card_text and card_text != starting_text:
        prompt = f"""<|system|>
You edit Magic the Gathering cards based on the user's request.
# RULES
- In your response always generate a new card.
- Only generate one card, no other dialogue.
- Surround card info in triple backticks (```).
- Format the card text using headers like in the example below:
```
Name: Band of Brothers
ManaCost: {{3}}{{W}}{{W}}
Type: Creature — Phyrexian Human Soldier
Rarity: rare
Text: Vigilance
{{W}}, {{T}}: Attach target creature you control to target creature. (Any number of attacking creatures with total power 5 or less can attack in a band. A band deals damage to that creature.)
FlavorText: "This time we will be stronger."
—Elder brotherhood blessing
Power: 2
Toughness: 2
Color: ['W']
```</s>
<|user|>
# CARD TO EDIT
```
{card_text}
```
# EDIT REQUEST
{user_request}
<|assistant|>
"""
    print(f"Calling API with prompt:\n{prompt}")
    params = {"max_new_tokens": 512}
    output = query({"inputs": prompt, "parameters": params})
    if 'error' in output:
        print(f'Language model call failed: {output["error"]}')
        raise gr.Warning(f'Language model call failed: {output["error"]}')
    print(f'API RESPONSE SIZE: {len(output[0]["generated_text"])}')
    assistant_reply = output[0]["generated_text"].split('<|assistant|>')[1]
    print(f'ASSISTANT REPLY:\n{assistant_reply}')
    new_card_text = assistant_reply.split('```')
    if len(new_card_text) > 1:
        new_card_text = new_card_text[1].strip()
    else:
        new_card_text = new_card_text.split('\n\n')
        if len(new_card_text) < 2:
            return assistant_reply, card_text, None
        new_card_text = new_card_text[1].strip()
    return assistant_reply, new_card_text, None


def format_html(text, image_data):
    template = pathlib.Path("./card_template.html").read_text(encoding='utf-8')
    if "['U']" in text:
        template = template.replace("{card_color}", 'style="background-color:#5a73ab"')
    elif "['W']" in text:
        template = template.replace("{card_color}", 'style="background-color:#f0e3d0"')
    elif "['G']" in text:
        template = template.replace("{card_color}", 'style="background-color:#325433"')
    elif "['B']" in text:
        template = template.replace("{card_color}", 'style="background-color:#1a1b1e"')
    elif "['R']" in text:
        template = template.replace("{card_color}", 'style="background-color:#c2401c"')
    elif "Type: Land" in text:
        template = template.replace("{card_color}", 'style="background-color:#aa8c71"')
    elif "Type: Artifact" in text:
        template = template.replace("{card_color}", 'style="background-color:#9ba7bc"')
    else:
        template = template.replace("{card_color}", 'style="background-color:#edd99d"')
    pattern = re.compile('Name: (.*)')
    name = pattern.findall(text)[0]
    template = template.replace("{name}", name)
    pattern = re.compile('Mana.?Cost: (.*)')
    mana_cost = pattern.findall(text)[0]
    if mana_cost == "None":
        template = template.replace("{mana_cost}", '<i class="ms ms-cost" style="visibility: hidden"></i>')
    else:
        symbols = []
        for c in mana_cost:
            if c in {"{", "}"}:
                continue
            else:
                symbols.append(c.lower())
        formatted_symbols = []
        for s in symbols:
            formatted_symbols.append(f'<i class="ms ms-{s} ms-cost ms-shadow"></i>')
        template = template.replace("{mana_cost}", "\n".join(formatted_symbols[::-1]))
    if not isinstance(image_data, (bytes, bytearray)):
        template = template.replace('{image_data}', f'{image_data}')
    else:
        template = template.replace('{image_data}', f'data:image/png;base64,{image_data.decode("utf-8")}')
    pattern = re.compile('Type: (.*)')
    card_type = pattern.findall(text)[0]
    template = template.replace("{card_type}", card_type)
    if len(card_type) > 30:
        template = template.replace("{type_size}", "16")
    else:
        template = template.replace("{type_size}", "18")
    pattern = re.compile('Rarity: (.*)')
    rarity = pattern.findall(text)[0]
    template = template.replace("{rarity}", f"ss-{rarity}")
    pattern = re.compile(r'Text: (.*?)\n^.+:', re.MULTILINE | re.DOTALL)
    card_text = pattern.findall(text)[0]
    text_lines = []
    for line in card_text.splitlines():
        line = line.replace('{T}',
                            '<i class="ms ms-tap ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>')
        line = line.replace('{UT}',
                            '<i class="ms ms-untap ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>')
        line = line.replace('{E}',
                            '<i class="ms ms-instant ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>')
        line = re.sub(r"{(.*?)}",
                      r'<i class="ms ms-\1 ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>'.lower(),
                      line)
        line = re.sub(r"ms-(.)/(.)",
                      r'<i class="ms ms-\1\2 ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>'.lower(),
                      line)
        line = line.replace('(', '(<i>').replace(')', '</i>)')
        text_lines.append(f"<p>{line}</p>")
    template = template.replace("{card_text}", "\n".join(text_lines))
    pattern = re.compile(r'Flavor.?Text: (.*?)\n^.+:', re.MULTILINE | re.DOTALL)
    flavor_text = pattern.findall(text)
    if flavor_text:
        flavor_text = flavor_text[0]
        flavor_text_lines = []
        for line in flavor_text.splitlines():
            flavor_text_lines.append(f"<p>{line}</p>")
        template = template.replace("{flavor_text}", "<blockquote>" + "\n".join(flavor_text_lines) + "</blockquote>")
    else:
        template = template.replace("{flavor_text}", "")
    if len(card_text) + len(flavor_text or '') > 170 or len(text_lines) > 3:
        template = template.replace("{text_size}", '16')
        template = template.replace(
            'ms-cost" style="top:0px;float:none;height: 18px;width: 18px;font-size: 13px;"></i>',
            'ms-cost" style="top:0px;float:none;height: 16px;width: 16px;font-size: 11px;"></i>')
    else:
        template = template.replace("{text_size}", '18')
    pattern = re.compile('Power: (.*)')
    power = pattern.findall(text)
    if power:
        power = power[0]
        if not power:
            template = template.replace("{power_toughness}", "")
        pattern = re.compile('Toughness: (.*)')
        toughness = pattern.findall(text)[0]
        template = template.replace("{power_toughness}",
                                    f'<header class="powerToughness"><div><h2 style="font-family: \'Beleren\';font-size: 19px;">{power}/{toughness}</h2></div></header>')
    else:
        template = template.replace("{power_toughness}", "")
    pathlib.Path("scratch.html").write_text(template, encoding='utf-8')
    return template


def get_savename(directory, name, extension):
    save_name = f"{name}.{extension}"
    i = 1
    while os.path.exists(os.path.join(directory, save_name)):
        save_name = save_name.replace(f'.{extension}', '').split('-')[0] + f"-{i}.{extension}"
        i += 1
    return save_name


def html_to_png(card_name, html):
    save_name = get_savename('rendered_cards', card_name, 'png')
    print('CONVERTING HTML CARD TO PNG IMAGE')

    path = os.path.join('rendered_cards', save_name)
    try:
        css = ['./css/mana.css', './css/keyrune.css',
               './css/mtg_custom.css']
        imgkit.from_string(html, path, {"xvfb": ""}, css=css)
    except:
        try:
            # For Windows local, requires 'html2image' package from pip.
            from html2image import Html2Image
            rendered_card_dir = 'rendered_cards'
            hti = Html2Image(output_path=rendered_card_dir)
            paths = hti.screenshot(html_str=html,
                                   css_file=['./css/mtg_custom.css', './css/mana.css',
                                             './css/keyrune.css'],
                                   save_as=save_name, size=(450, 600))
            print(paths)
            path = paths[0]
        except:
            pass
    print('OPENING IMAGE FROM FILE')
    img = Image.open(path)
    print('CROPPING BACKGROUND')
    area = (0, 50, 400, 600)
    cropped_img = img.crop(area)
    cropped_img.resize((400, 550))
    cropped_img.save(os.path.join(path))
    print('CONVERTING HTML CARD TO PNG IMAGE COMPLETE')
    return cropped_img.convert('RGB')


def get_initial_card():
    return Image.open('SampleCard.png')


def pil_to_base64(image):
    print('CONVERTING PIL IMAGE TO BASE64 STRING')
    buffered = BytesIO()
    image.save(buffered, format="PNG")
    img_str = base64.b64encode(buffered.getvalue())
    print('CONVERTING PIL IMAGE TO BASE64 STRING COMPLETE')
    return img_str


def generate_card(image: str, card_text: str):
    image_data = pil_to_base64(Image.open(image))
    html = format_html(card_text, image_data)
    pattern = re.compile('Name: (.*)')
    name = pattern.findall(card_text)[0]
    card = html_to_png(name, html)
    return card


def transcribe(audio: str) -> (str, str):
    result = whisper_pipe(audio)
    return result["text"], None


starting_text = """Name: Wizards of the Coast
ManaCost: {0}
Type: Enchantment
Rarity: mythic rare
Text: At the beginning of your upkeep, reveal the top card of your library. If it's a card named "Magic: The Gathering", put it into your hand. Otherwise, put it into your graveyard.
FlavorText: "We are the guardians of the multiverse, and we will protect it at all costs."
Color: ['U']"""


def generate_image(card_text: str):
    pattern = re.compile('Name: (.*)')
    name = pattern.findall(card_text)[0]
    pattern = re.compile('Type: (.*)')
    card_type = pattern.findall(card_text)[0]
    prompt = f"fantasy illustration of a {card_type} {name}, by Greg Rutkowski"
    print(f'Calling image generation with prompt: {prompt}')
    try:
        result = client.predict(
            prompt,  # str  in 'parameter_5' Textbox component
            0.3,  # float (numeric value between 0.0 and 5) in 'Guidance' Slider component
            4,  # float (numeric value between 2 and 10) in 'Steps' Slider component
            random.randint(0, 12013012031030),
            # float (numeric value between 0 and 12013012031030) in 'Seed' Slider component
            api_name="/predict"
        )
        print(result)
        return result
    except Exception as e:
        print(f'Failed to generate image from client: {e}')
        return 'placeholder.png'


def add_hotkeys() -> str:
    return pathlib.Path("hotkeys.js").read_text()


with gr.Blocks(title='MagicGen') as demo:
    gr.Markdown("# 🎴 MagicGenV2")
    gr.Markdown("## Generate and Edit Magic the Gathering Cards with a Chat Assistant")
    with gr.Row():
        with gr.Column():
            with gr.Group():
                audio_in = gr.Microphone(label="Record a voice request (click or press ctrl + ` to start/stop)",
                                         type='filepath', elem_classes=["record-btn"])
                prompt_in = gr.Textbox(label="Or type a text request and press Enter", interactive=True,
                                       placeholder="Need an idea? Try one of these:\n- Create a creature card named 'WiFi Elemental'\n- Make it an instant\n- Change the color")
            with gr.Accordion(label='🤖 Chat Assistant Response', open=False):
                bot_text = gr.TextArea(label='Response', interactive=False)
    with gr.Row():
        with gr.Column():
            in_text = gr.TextArea(label="Card Text (Shift+Enter to submit)", value=starting_text)
            in_image = gr.Image(label="Card Image (400px x 550px)", type='filepath', value='placeholder.png')
            run_button = gr.Button('🔄 Regenerate Card', variant="primary")
            gr.ClearButton([audio_in, prompt_in, in_text, in_image])
        with gr.Column():
            out_image = gr.Image(label="Rendered Card", value=get_initial_card())

    # Shift + Enter to submit text in TextAreas
    audio_in.stop_recording(transcribe, [audio_in], [prompt_in, audio_in], None).then(generate_text,
                                                                                      [in_text, prompt_in],
                                                                                      [bot_text, in_text,
                                                                                       audio_in]).then(generate_image,
                                                                                                       [in_text],
                                                                                                       [in_image],
                                                                                                       None).then(
        generate_card, [in_image, in_text], [out_image], None)
    prompt_in.submit(generate_text, [in_text, prompt_in], [bot_text, in_text, audio_in]).then(generate_image, [in_text],
                                                                                              [in_image], None).then(
        generate_card, [in_image, in_text], [out_image], None)
    in_text.submit(generate_image, [in_text], [in_image], None).then(generate_card, [in_image, in_text], [out_image],
                                                                     None)
    run_button.click(generate_image, [in_text], [in_image], None).then(generate_card, [in_image, in_text], [out_image],
                                                                       None)
    demo.load(None, None, None, js=add_hotkeys())

if __name__ == "__main__":
    demo.queue().launch(favicon_path="favicon-96x96.png")