42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
"""Floorplan detector service - OCR-based square meter detection."""
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import asyncio
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from models import Listing
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from rec import floorplan
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from repositories.listing_repository import ListingRepository
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from tqdm.asyncio import tqdm
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import multiprocessing
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async def detect_floorplan(repository: ListingRepository) -> None:
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"""Detect square meters from floorplan images for all listings."""
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listings = await repository.get_listings()
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cpu_count = multiprocessing.cpu_count() // 4
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semaphore = asyncio.Semaphore(cpu_count)
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updated_listings = [
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listing
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for listing in await tqdm.gather(
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*[_calculate_sqm_ocr(listing, semaphore) for listing in listings]
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)
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if listing is not None
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]
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await repository.upsert_listings(updated_listings)
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async def _calculate_sqm_ocr(
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listing: Listing, semaphore: asyncio.Semaphore
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) -> Listing | None:
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"""Calculate square meters from floorplan images using OCR."""
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if listing.square_meters is not None:
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return None
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sqms: list[float] = []
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for floorplan_path in listing.floorplan_image_paths:
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async with semaphore:
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estimated_sqm, _ = await asyncio.to_thread(
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floorplan.calculate_ocr, floorplan_path
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)
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if estimated_sqm is not None:
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sqms.append(estimated_sqm)
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max_sqm = max(sqms, default=0) # try once, if we fail, keep as 0
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listing.square_meters = max_sqm
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return listing
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