api/fal.py

import time
from io import BytesIO
from pathlib import Path
from typing import Any

import fal_client
import requests
from PIL import Image

from api.flux import FluxAPI


class FalAPI(FluxAPI):
    @property
    def name(self) -> str:
        return "fal"

    def generate_image(self, prompt: str, save_path: Path) -> float:
        start_time = time.time()
        result = fal_client.subscribe(
            "fal-ai/flux/dev",
            arguments={
                "seed": 0,
                "prompt": prompt,
                "image_size": "square_hd",  # 1024x1024 image
                "num_images": 1,
                "guidance_scale": 3.5,
                "num_inference_steps": 28,
                "enable_safety_checker": True,
            },
        )
        end_time = time.time()
        
        url = result["images"][0]["url"]
        self._save_image_from_url(url, save_path)
        
        return end_time - start_time

    def _save_image_from_url(self, url: str, save_path: Path):
        response = requests.get(url)
        image = Image.open(BytesIO(response.content))
        save_path.parent.mkdir(parents=True, exist_ok=True)
        image.save(save_path)

    def _save_image_from_result(self, result: Any, save_path: Path):
        save_path.parent.mkdir(parents=True, exist_ok=True)
        with open(save_path, "wb") as f:
            f.write(result.content)