112 lines
3.7 KiB
Python
112 lines
3.7 KiB
Python
import asyncio
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import json
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import pathlib
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from typing import Any
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from rec.query import detail_query, listing_query, QueryParameters
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from rec.districts import get_districts
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from repositories import ListingRepository
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from tqdm.asyncio import tqdm
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from data_access import Listing
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from models import Listing as modelListing
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async def dump_listings(
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parameters: QueryParameters,
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repository: ListingRepository,
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data_dir: pathlib.Path = pathlib.Path("data/rs/"),
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) -> list[modelListing]:
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if parameters.district_names:
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districts = {
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district: locid
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for district, locid in get_districts().items()
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if district in parameters.district_names
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}
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else:
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districts = get_districts()
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print("Valid districts to scrape:", districts.keys())
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semaphore = asyncio.Semaphore(5) # if too high, rightmove drops connections
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json_responses = await tqdm.gather(
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*[
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_fetch_listings_with_semaphore(semaphore, i, parameters, locid)
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for locid in districts.values()
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for i in [1, 2]
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],
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desc="Fetching listings",
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)
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listings: list[Listing] = []
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for response_json in json_responses:
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if response_json["totalAvailableResults"] == 0:
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continue
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for property in response_json["properties"]:
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identifier = property["identifier"]
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listing = Listing(identifier, data_dir=data_dir, _listing_object=property)
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listings.append(listing)
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# if listing is already in db, do not fetch details again
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all_listings = await repository.get_listings(
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only_ids=[listing.identifier for listing in listings],
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query_parameters=parameters,
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)
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all_listing_ids = {listing.id for listing in all_listings}
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listings_without_details = [
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listing for listing in listings if not listing.path_detail_json().exists()
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]
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listing_details = await tqdm.gather(
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*[
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_fetch_detail_with_semaphore(semaphore, listing.identifier)
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for listing in listings_without_details
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if listing.identifier not in all_listing_ids
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],
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desc="Fetching details (only missing)",
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)
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for listing, detail in zip(listings_without_details, listing_details):
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listing._details_object = detail
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await dump_listings_to_fs(listings)
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model_listings = await repository.upsert_listings_legacy(listings) # upsert in db
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return model_listings
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async def _fetch_listings_with_semaphore(
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semaphore: asyncio.Semaphore,
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page_id: int,
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parameters: QueryParameters,
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location_id: str,
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) -> dict[str, Any]:
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async with semaphore:
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listing_query_result = await listing_query(
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page=page_id,
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channel=parameters.listing_type,
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min_bedrooms=parameters.min_bedrooms,
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max_bedrooms=parameters.max_bedrooms,
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radius=parameters.radius,
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min_price=parameters.min_price,
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max_price=parameters.max_price,
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location_id=location_id,
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page_size=parameters.page_size,
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max_days_since_added=parameters.max_days_since_added,
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furnish_types=parameters.furnish_types or [],
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)
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return listing_query_result
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async def _fetch_detail_with_semaphore(
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semaphore: asyncio.Semaphore, listing_id: int
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) -> dict[str, Any]:
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async with semaphore:
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d = await detail_query(listing_id)
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return d
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async def dump_listings_to_fs(listings: list[Listing]) -> None:
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for listing in listings:
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if not listing.path_listing_json().exists():
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listing.dump_listing()
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if not listing.path_detail_json().exists():
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with open(listing.path_detail_json(), "w") as f:
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json.dump(listing._details_object, f, indent=4)
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