Add missing code
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.schema import ForeignKey, Column
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from sqlalchemy.orm import relationship, column_property, deferred
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from sqlalchemy import func
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from sqlalchemy.types import Integer, String, Float
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from sqlalchemy.dialects import postgresql
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from sqlalchemy.sql.expression import cast
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from sqlalchemy.ext.hybrid import hybrid_property
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from sqlalchemy.ext.declarative import declared_attr
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from geoalchemy2 import Geography, Geometry
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from collections import defaultdict
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from .database import session
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from . import wikidata, utils
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import json
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import re
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Base = declarative_base()
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Base.query = session.query_property()
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re_point = re.compile(r'^POINT\((.+) (.+)\)$')
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class Item(Base):
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__tablename__ = "item"
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item_id = Column(Integer, primary_key=True, autoincrement=False)
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labels = Column(postgresql.JSONB)
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descriptions = Column(postgresql.JSONB)
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aliases = Column(postgresql.JSONB)
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sitelinks = Column(postgresql.JSONB)
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claims = Column(postgresql.JSONB)
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lastrevid = Column(Integer, nullable=False, unique=True)
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locations = relationship("ItemLocation", cascade="all, delete-orphan", backref="item")
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qid = column_property("Q" + cast(item_id, String))
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@classmethod
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def get_by_qid(cls, qid):
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if qid and len(qid) > 1 and qid[0].upper() == "Q" and qid[1:].isdigit():
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return cls.query.get(qid[1:])
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def get_claim(self, pid):
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return [i["mainsnak"]["datavalue"]["value"] if "datavalue" in i["mainsnak"] else None
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for i in self.claims.get(pid, [])]
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def label(self, lang='en'):
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if lang in self.labels:
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return self.labels[lang]['value']
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elif 'en' in self.labels:
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return self.labels['en']['value']
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return list(self.labels.values())[0]['value']
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def description(self, lang='en'):
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if lang in self.descriptions:
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return self.descriptions[lang]['value']
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elif 'en' in self.descriptions:
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return self.descriptions['en']['value']
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return
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d_list = list(self.descriptions.values())
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if d_list:
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return d_list[0]['value']
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def get_part_of_names(self):
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if not self.claims:
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return set()
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part_of_names = set()
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for p361 in self.claims.get('P361', []):
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try:
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part_of_id = p361['mainsnak']['datavalue']['value']['numeric-id']
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except KeyError:
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continue
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if part_of_id == self.item_id:
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continue # avoid loop for 'part of' self-reference
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# TODO: download item if it doesn't exist
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part_of_item = Item.query.get(part_of_id)
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if part_of_item:
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names = part_of_item.names(check_part_of=False)
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if names:
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part_of_names |= names.keys()
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return part_of_names
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@property
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def entity(self):
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keys = ['labels', 'aliases', 'descriptions', 'sitelinks', 'claims']
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return {key: getattr(self, key) for key in keys}
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def names(self, check_part_of=True):
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part_of_names = self.get_part_of_names() if check_part_of else set()
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d = wikidata.names_from_entity(self.entity) or defaultdict(list)
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for name, sources in list(d.items()):
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if len(sources) == 1 and sources[0][0] == 'image':
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continue
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for part_of_name in part_of_names:
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if not name.startswith(part_of_name):
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continue
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prefix_removed = name[len(part_of_name):].strip()
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if prefix_removed not in d:
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d[prefix_removed] = sources
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if self.claims:
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for p6375 in self.claims.get('P6375', []):
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try:
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street_address = p6375['mainsnak']['datavalue']['value']
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except KeyError:
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continue
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d[street_address['text']].append(('P6375', street_address.get('language')))
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# A terrace of buildings can be illustrated with a photo of a single building.
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# We try to determine if this is the case and avoid using the filename of the
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# single building photo as a name for matching.
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def has_digit(s):
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return any(c.isdigit() for c in s)
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image_names = {name for name, sources in d.items()
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if len(sources) == 1 and sources[0][0] == 'image' and has_digit(name)}
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if not image_names:
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return dict(d) or None
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other_names = {n for n in d.keys() if n not in image_names and has_digit(n)}
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for image_name in image_names:
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for other in other_names:
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if not utils.is_in_range(other, image_name):
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continue
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del d[image_name]
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break
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return dict(d) or None
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# class Claim(Base):
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# __tablename__ = "claim"
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# item_id = Column(Integer, primary_key=True)
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# property_id = Column(Integer, primary_key=True)
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# position = Column(Integer, primary_key=True)
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# mainsnak = Column(postgresql.JSONBB)
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class ItemIsA(Base):
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__tablename__ = 'item_isa'
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item_id = Column(Integer, ForeignKey('item.item_id'), primary_key=True)
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isa_id = Column(Integer, ForeignKey('item.item_id'), primary_key=True)
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item = relationship('Item', foreign_keys=[item_id])
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isa = relationship('Item', foreign_keys=[isa_id])
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class ItemLocation(Base):
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__tablename__ = "item_location"
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item_id = Column(Integer, ForeignKey("item.item_id"), primary_key=True)
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property_id = Column(Integer, primary_key=True)
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statement_order = Column(Integer, primary_key=True)
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location = Column(Geography("POINT", srid=4326, spatial_index=True), nullable=False)
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qid = column_property("Q" + cast(item_id, String))
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pid = column_property("P" + cast(item_id, String))
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def get_lat_lon(self):
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return session.query(func.ST_Y(self.location),
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func.ST_X(self.location)).one()
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def location_objects(coords):
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locations = []
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for pid, coord_list in coords.items():
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for num, coords in enumerate(coord_list):
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point = f"POINT({coords['longitude']} {coords['latitude']})"
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loc = ItemLocation(property_id=int(pid[1:]),
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statement_order=num,
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location=point)
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locations.append(loc)
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return locations
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class MapMixin:
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@declared_attr
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def __tablename__(cls):
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return "planet_osm_" + cls.__name__.lower()
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src_id = Column("osm_id", Integer, primary_key=True, autoincrement=False)
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name = Column(String)
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admin_level = Column(String)
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boundary = Column(String)
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tags = Column(postgresql.HSTORE)
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@declared_attr
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def way(cls):
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return deferred(
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Column(Geometry("GEOMETRY", srid=4326, spatial_index=True), nullable=False)
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)
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@declared_attr
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def kml(cls):
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return column_property(func.ST_AsKML(cls.way), deferred=True)
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@declared_attr
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def geojson_str(cls):
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return column_property(func.ST_AsGeoJSON(cls.way), deferred=True)
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def geojson(self):
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return json.loads(self.geojson_str)
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def get_centroid(self):
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centroid = session.query(func.ST_AsText(func.ST_Centroid(self.way))).scalar()
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lon, lat = re_point.match(centroid).groups()
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return (float(lat), float(lon))
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@classmethod
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def coords_within(cls, lat, lon):
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point = func.ST_SetSRID(func.ST_MakePoint(lon, lat), 4326)
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return cls.query.filter(
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cls.admin_level.isnot(None), func.ST_Within(point, cls.way)
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).order_by(cls.area)
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@property
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def id(self):
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return abs(self.src_id) # relations have negative IDs
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@property
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def identifier(self):
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return f"{self.type}/{self.id}"
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@property
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def osm_url(self):
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return f"https://www.openstreetmap.org/{self.type}/{self.id}"
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class Point(MapMixin, Base):
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type = "node"
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class Line(MapMixin, Base):
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@property
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def type(self):
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return "way" if self.src_id > 0 else "relation"
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class Polygon(MapMixin, Base):
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way_area = Column(Float)
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@property
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def type(self):
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return "way" if self.src_id > 0 else "relation"
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@declared_attr
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def area(cls):
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return column_property(func.ST_Area(cls.way, False), deferred=True)
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@hybrid_property
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def area_in_sq_km(self):
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return self.area / (1000 * 1000)
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