wrongmove/crawler/data_access.py

from dataclasses import dataclass
import json
import pathlib
from typing import List, Dict
from rec import floorplan, routing
import re

_DATA_DIR = pathlib.Path('data/rs/')

@dataclass()
class Listing():
    identifier: int
    _cached: Dict = None
    
    @staticmethod
    def get_all_listings() -> List['Listing']:
        listing_paths = sorted(list(_DATA_DIR.glob('*/listing.json')))
        identifiers = []
        for listing_path in listing_paths:
            with open(listing_path) as f:
                d = json.load(f)
            identifiers.append(Listing(d['identifier']))
        
        return identifiers

    def path_listing(self) -> pathlib.Path:
        p = _DATA_DIR / str(self.identifier)
        p.mkdir(parents=True, exist_ok=True)
        return p
    
    def path_listing_json(self) -> pathlib.Path:
        return self.path_listing() / 'listing.json'
    
    def path_detail_json(self) -> pathlib.Path:
        return self.path_listing() / 'detail.json'
    
    def path_routing_json(self) -> pathlib.Path:
        return self.path_listing() / 'routing.json'
    
    def path_floorplan_model_json(self) -> pathlib.Path:
        return self.path_listing() / 'floorplan_model.json'
    
    def path_floorplan_ocr_json(self) -> pathlib.Path:
        return self.path_listing() / 'floorplan_ocr.json'
    
    def path_pic_folder(self) -> pathlib.Path:
        return self.path_listing() / 'pics'
    
    def path_pic_file(self, order, name) -> pathlib.Path:
        self.path_pic_folder().mkdir(parents=True, exist_ok=True)
        return self.path_pic_folder() / f'{order}_{name}'
    
    def path_floorplan_folder(self) -> pathlib.Path:
        return self.path_listing() / 'floorplans'
    
    def path_floorplan_file(self, order, name) -> pathlib.Path:
        self.path_floorplan_folder().mkdir(parents=True, exist_ok=True)
        return self.path_floorplan_folder() / f'{order}_{name}'
    
    def list_floorplans(self):
        images = list(self.path_floorplan_folder().glob('*'))
        # todo add check if return is image
        return images
    
    def calculate_sqm_model(self):
        objs = []
        for floorplan_path in self.list_floorplans():
            estimated_sqm, model_output, predictions = floorplan.calculate_model(floorplan_path)
            objs.append({
                'floorplan_path': str(floorplan_path),
                'estimated_sqm': estimated_sqm,
                'model_output': model_output,
                'no_predictions': len(predictions) # cant serialize the predictions itself since its a tensor
            })
        
        with open(self.path_floorplan_model_json(), 'w') as f:
            json.dump(objs, f)
    
    @property
    def sqm_model(self, recalculate=True):
        if not self.path_floorplan_model_json().exists() or recalculate:
            self.calculate_sqm_model()
        
        with open(self.path_floorplan_json()) as f:
            objs = json.load(f)
        
        max_sqm = max([o['estimated_sqm'] for o in objs if o is None]) # filter out Nones
        return max_sqm
    
    def calculate_sqm_ocr(self, recalculate=True):
        if not recalculate and self.path_floorplan_ocr_json().exists():
            return
        
        objs = []
        for floorplan_path in self.list_floorplans():
            estimated_sqm, model_output = floorplan.calculate_ocr(floorplan_path)
            objs.append({
                'floorplan_path': str(floorplan_path),
                'estimated_sqm': estimated_sqm,
                'text': model_output,
            })
        
        with open(self.path_floorplan_ocr_json(), 'w') as f:
            json.dump(objs, f)
    
    @property
    def sqm_ocr(self, recalculate=False):
        if not self.path_floorplan_ocr_json().exists() or recalculate:
            self.calculate_sqm_ocr()
        
        with open(self.path_floorplan_ocr_json()) as f:
            objs = json.load(f)
        
        
        sqms = [o['estimated_sqm'] for o in objs if o['estimated_sqm'] is not None]
        if len(sqms) == 0:
            return None
        max_sqm = max(sqms)
        return max_sqm
    
    def calculate_route(self, dest_lat: float, dest_lon: float, recalculate=False):
        if self.path_routing_json().exists() and not recalculate:
            return
        
        result = routing.transit_route(self.latitude, self.longitude, dest_lat, dest_lon)
        with open(self.path_routing_json(), 'w') as f:
            json.dump(result, f)
            
    @property
    def travel_time(self) -> List:
        if not self.path_routing_json().exists():
            return []
        with open(self.path_routing_json()) as f:
            d = json.load(f)
        
        return routing.extract_time(d)
        
    
    @property
    def url(self):
        return f'https://www.rightmove.co.uk/properties/{self.identifier}'
    
    @property
    def detailobject(self):
        if self._cached is None:
            with open(self.path_detail_json()) as f:
                self._cached = json.load(f)
        return self._cached
    
    @property
    def price(self) -> float:
        return self.detailobject['property']['price']
    
    @property
    def price_per_sqm(self) -> float:
        if self.sqm_ocr is None or self.sqm_ocr == 0:
            return None
        return self.price / self.sqm_ocr
    
    @property
    def bedrooms(self) -> int:
        return self.detailobject['property']['bedrooms']
    
    @property
    def latitude(self) -> float:
        return self.detailobject['property']['latitude']
    
    @property
    def longitude(self) -> float:
        return self.detailobject['property']['longitude']
    
    @property
    def leaseLeft(self) -> int:
        ds = self.detailobject['property'].get('tenureInfo', {}).get('content', [])
        for d in ds:
            if d['type'] == 'lengthOfLease':
                matches = re.findall(r'(\d+\.?\d*)', d['value'])
                if len(matches):
                    return float(matches[0])
        return None
    
    @property
    def development(self) -> bool:
        # aka new home
        return self.detailobject['property']['development']
    
    def dict_nicely(self):
        return {
            'identifier': self.identifier,
            'sqm_ocr': self.sqm_ocr,
            'price': self.price,
            'price_per_sqm': self.price_per_sqm,
            'url': self.url,
            'bedrooms': self.bedrooms,
            'travel_time_fastest': self.travel_time[0],
            'travel_time_second': None if len(self.travel_time) < 2 else self.travel_time[1],
            'lease_left': self.leaseLeft,
            'development': self.development,
        }
    
    
            
    
if __name__ == '__main__':    
    listings = Listing.get_all_listings()
    print(listings[0].list_floorplans())