Add types and docstrings.
This commit is contained in:
parent
5c01d9aebf
commit
baf21b9803
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@ -1,3 +1,6 @@
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"""Reverse geocode for Wikidata and Wikimedia Commons."""
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headers = {"User-Agent": "UK gecode/0.1 (edward@4angle.com)"}
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samples = [
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@ -1,25 +1,31 @@
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import flask
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import sqlalchemy
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from sqlalchemy import create_engine, func
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from sqlalchemy.orm import scoped_session, sessionmaker
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session = scoped_session(sessionmaker())
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def init_db(db_url):
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session.configure(bind=get_engine(db_url))
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def init_db(db_url: str, echo: bool = False) -> None:
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"""Initialise databsae."""
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session.configure(bind=get_engine(db_url, echo=echo))
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def get_engine(db_url, echo=False):
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def get_engine(db_url: str, echo: bool = False) -> sqlalchemy.engine.base.Engine:
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"""Create an engine object."""
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return create_engine(db_url, pool_recycle=3600, echo=echo)
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def init_app(app, echo=False):
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def init_app(app: flask.app.Flask, echo: bool = False) -> None:
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"""Initialise database connection within flask app."""
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db_url = app.config["DB_URL"]
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session.configure(bind=get_engine(db_url, echo=echo))
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@app.teardown_appcontext
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def shutdown_session(exception=None):
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def shutdown_session(exception: Exception | None = None) -> None:
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session.remove()
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def now_utc():
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"""Time in UTC via SQL."""
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return func.timezone("utc", func.now())
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@ -1,12 +1,15 @@
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.schema import Column
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from sqlalchemy.types import Integer, Float, Numeric, String
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from sqlalchemy.dialects import postgresql
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from sqlalchemy.orm import column_property
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from sqlalchemy.ext.hybrid import hybrid_property
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from sqlalchemy import func, cast
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"""Database model."""
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import sqlalchemy
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from geoalchemy2 import Geometry
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from sqlalchemy import cast, func
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from sqlalchemy.dialects import postgresql
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.ext.hybrid import hybrid_property
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from sqlalchemy.orm import column_property
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from sqlalchemy.schema import Column
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from sqlalchemy.types import Float, Integer, Numeric, String
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from .database import session
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Base = declarative_base()
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@ -14,6 +17,8 @@ Base.query = session.query_property()
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class Polygon(Base):
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"""Polygon."""
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__tablename__ = "planet_osm_polygon"
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osm_id = Column(Integer, primary_key=True, autoincrement=False)
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@ -25,25 +30,33 @@ class Polygon(Base):
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area = column_property(func.ST_Area(way, False))
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@property
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def osm_url(self):
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def osm_url(self) -> str:
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"""OSM URL for polygon."""
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osm_type = "way" if self.osm_id > 0 else "relation"
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return f"https://www.openstreetmap.org/{osm_type}/{abs(self.osm_id)}"
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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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def area_in_sq_km(self) -> float:
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"""Area in square kilometers."""
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return float(self.area) / (1000 * 1000)
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@classmethod
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def coords_within(cls, lat, lon):
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def coords_within(
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cls, lat: str | float, lon: str | float
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) -> sqlalchemy.orm.query.Query["Polygon"]:
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"""Polygons that contain given coordinates."""
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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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q: sqlalchemy.orm.query.Query["Polygon"] = cls.query.filter(
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cls.admin_level.isnot(None),
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cls.admin_level.regexp_match("^\d+$"),
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func.ST_Within(point, cls.way),
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).order_by(cls.area, cast(cls.admin_level, Integer).desc())
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return q
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class Scotland(Base):
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"""Civil parishes in Scotland."""
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__tablename__ = "scotland"
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gid = Column(Integer, primary_key=True)
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from flask import current_app
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"""Reverse geocode civil parishes in Scotland."""
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import psycopg2
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from flask import current_app
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def get_scotland_code(lat, lon):
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def get_scotland_code(lat: str | float, lon: str | float) -> str | None:
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"""Find civil parish in Scotland for given lat/lon."""
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conn = psycopg2.connect(**current_app.config["DB_PARAMS"])
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cur = conn.cursor()
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@ -1,41 +1,54 @@
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from flask import render_template
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import requests
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import simplejson
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from . import headers
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"""Wikidata API functions."""
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import typing
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import urllib.parse
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import requests
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import simplejson.errors
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from flask import render_template
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from . import headers
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wikidata_query_api_url = "https://query.wikidata.org/bigdata/namespace/wdq/sparql"
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wd_entity = "http://www.wikidata.org/entity/Q"
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commons_cat_start = "https://commons.wikimedia.org/wiki/Category:"
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class QueryError(Exception):
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def __init__(self, query, r):
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"""Query error."""
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def __init__(self, query: str, r: requests.Response):
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"""Init."""
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self.query = query
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self.r = r
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def api_call(params):
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return requests.get(
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"https://www.wikidata.org/w/api.php",
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params={"format": "json", "formatversion": 2, **params},
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headers=headers,
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).json()
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def api_call(params: dict[str, str | int]) -> dict[str, typing.Any]:
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"""Wikidata API call."""
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api_params: dict[str, str | int] = {"format": "json", "formatversion": 2, **params}
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r = requests.get(
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"https://www.wikidata.org/w/api.php", params=api_params, headers=headers
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)
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return typing.cast(dict[str, typing.Any], r.json())
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def get_entity(qid):
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def get_entity(qid: str) -> dict[str, typing.Any] | None:
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"""Get Wikidata entity."""
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json_data = api_call({"action": "wbgetentities", "ids": qid})
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try:
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entity = list(json_data["entities"].values())[0]
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entity: dict[str, typing.Any] = list(json_data["entities"].values())[0]
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except KeyError:
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return
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if "missing" not in entity:
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return entity
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return None
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return entity if "missing" not in entity else None
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def qid_to_commons_category(qid):
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def qid_to_commons_category(qid: str) -> str | None:
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"""Commons category for a given Wikidata item."""
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entity = get_entity(qid)
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if not entity:
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return None
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commons_cat: str | None
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try:
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commons_cat = entity["claims"]["P373"][0]["mainsnak"]["datavalue"]["value"]
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except Exception:
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@ -44,29 +57,36 @@ def qid_to_commons_category(qid):
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return commons_cat
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def wdqs(query):
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Row = dict[str, dict[str, typing.Any]]
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def wdqs(query: str) -> list[Row]:
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"""Pass query to the Wikidata Query Service."""
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r = requests.post(
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wikidata_query_api_url, data={"query": query, "format": "json"}, headers=headers
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)
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try:
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return r.json()["results"]["bindings"]
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return typing.cast(list[Row], r.json()["results"]["bindings"])
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except simplejson.errors.JSONDecodeError:
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raise QueryError(query, r)
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def wd_to_qid(wd):
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def wd_to_qid(wd: dict[str, str]) -> str:
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"""Convert Wikidata URL from WDQS to QID."""
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# expecting {"type": "url", "value": "https://www.wikidata.org/wiki/Q30"}
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if wd["type"] == "uri":
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assert wd["type"] == "uri"
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return wd_uri_to_qid(wd["value"])
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def wd_uri_to_qid(value):
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def wd_uri_to_qid(value: str) -> str:
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"""Convert URL like https://www.wikidata.org/wiki/Q30 to QID."""
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assert value.startswith(wd_entity)
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return value[len(wd_entity) - 1 :]
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def geosearch_query(lat, lon):
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def geosearch_query(lat: str | float, lon: str | float) -> list[Row]:
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"""Geosearch via WDQS."""
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if isinstance(lat, float):
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lat = f"{lat:f}"
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if isinstance(lon, float):
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@ -76,7 +96,8 @@ def geosearch_query(lat, lon):
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return wdqs(query)
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def geosearch(lat, lon):
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def geosearch(lat: str | float, lon: str | float) -> Row | None:
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"""Geosearch."""
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default_max_dist = 1
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rows = geosearch_query(lat, lon)
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max_dist = {
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break
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return row
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return None
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def lookup_scottish_parish_in_wikidata(code):
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query = render_template("sparql/scottish_parish.sparql", code=code)
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return wdqs(query)
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def lookup_scottish_parish_in_wikidata(code: str) -> list[Row]:
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"""Lookup scottish parish in Wikidata."""
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return wdqs(render_template("sparql/scottish_parish.sparql", code=code))
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def lookup_gss_in_wikidata(gss):
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query = render_template("sparql/lookup_gss.sparql", gss=gss)
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return wdqs(query)
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def lookup_gss_in_wikidata(gss: str) -> list[Row]:
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"""Lookup GSS in Wikidata."""
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return wdqs(render_template("sparql/lookup_gss.sparql", gss=gss))
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def lookup_wikidata_by_name(name, lat, lon):
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def lookup_wikidata_by_name(name: str, lat: float | str, lon: float | str) -> list[Row]:
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"""Lookup place in Wikidata by name."""
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query = render_template(
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"sparql/lookup_by_name.sparql", name=repr(name), lat=str(lat), lon=str(lon)
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)
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return wdqs(query)
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def unescape_title(t):
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def unescape_title(t: str) -> str:
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"""Unescape article title."""
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return urllib.parse.unquote(t.replace("_", " "))
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def commons_from_rows(rows):
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Hit = dict[str, str | None]
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def commons_from_rows(rows: list[Row]) -> Hit | None:
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"""Commons from rows."""
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for row in rows:
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if "commonsCat" in row:
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qid = wd_to_qid(row["item"])
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@ -138,22 +166,28 @@ def commons_from_rows(rows):
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qid = wd_to_qid(row["item"])
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cat = unescape_title(site_link[len(commons_cat_start) :])
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return {"wikidata": qid, "commons_cat": cat}
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return None
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def get_commons_cat_from_gss(gss):
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def get_commons_cat_from_gss(gss: str) -> Hit | None:
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"""Get commons from GSS via Wikidata."""
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return commons_from_rows(lookup_gss_in_wikidata(gss))
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def build_dict(hit, lat, lon):
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WikidataDict = dict[str, None | bool | str | int | dict[str, typing.Any]]
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def build_dict(hit: Hit | None, lat: str | float, lon: str | float) -> WikidataDict:
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"""Build dict."""
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coords = {"lat": lat, "lon": lon}
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if hit is None:
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return dict(commons_cat=None, missing=True, coords=coords)
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return {"commons_cat": None, "missing": True, "coords": coords}
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commons_cat = hit["commons_cat"]
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ret = dict(
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coords=coords,
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admin_level=hit.get("admin_level"),
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wikidata=hit["wikidata"],
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)
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ret: WikidataDict = {
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"coords": coords,
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"admin_level": hit.get("admin_level"),
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"wikidata": hit["wikidata"],
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}
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if not commons_cat:
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return ret
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75
lookup.py
75
lookup.py
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#!/usr/bin/python3
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from flask import Flask, render_template, request, jsonify, redirect, url_for
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from geocode import wikidata, scotland, database, model
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import geocode
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import random
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import typing
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import sqlalchemy
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from flask import Flask, jsonify, redirect, render_template, request, url_for
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from werkzeug.wrappers import Response
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import geocode
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from geocode import database, model, scotland, wikidata
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city_of_london_qid = "Q23311"
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app = Flask(__name__)
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@ -11,8 +16,8 @@ app.config.from_object("config.default")
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database.init_app(app)
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def get_random_lat_lon():
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"""Select random lat/lon within the UK"""
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def get_random_lat_lon() -> tuple[float, float]:
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"""Select random lat/lon within the UK."""
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south, east = 50.8520, 0.3536
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north, west = 53.7984, -2.7296
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@ -23,7 +28,12 @@ def get_random_lat_lon():
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return lat, lon
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def do_lookup(elements, lat, lon):
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Elements = sqlalchemy.orm.query.Query[model.Polygon]
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def do_lookup(
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elements: Elements, lat: str | float, lon: str | float
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) -> wikidata.WikidataDict:
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try:
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hit = osm_lookup(elements, lat, lon)
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except wikidata.QueryError as e:
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@ -36,9 +46,10 @@ def do_lookup(elements, lat, lon):
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return wikidata.build_dict(hit, lat, lon)
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def lat_lon_to_wikidata(lat, lon):
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def lat_lon_to_wikidata(lat: str | float, lon: str | float) -> dict[str, typing.Any]:
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scotland_code = scotland.get_scotland_code(lat, lon)
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elements: typing.Any
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if scotland_code:
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rows = wikidata.lookup_scottish_parish_in_wikidata(scotland_code)
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hit = wikidata.commons_from_rows(rows)
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@ -55,6 +66,7 @@ def lat_lon_to_wikidata(lat, lon):
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return {"elements": elements, "result": result}
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admin_level = result.get("admin_level")
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assert isinstance(admin_level, int)
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if not admin_level or admin_level >= 7:
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return {"elements": elements, "result": result}
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@ -68,11 +80,16 @@ def lat_lon_to_wikidata(lat, lon):
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return {"elements": elements, "result": result}
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def osm_lookup(elements, lat, lon):
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def osm_lookup(
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elements: Elements, lat: str | float, lon: str | float
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) -> wikidata.Hit | None:
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"""OSM lookup."""
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ret: wikidata.Hit | None
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for e in elements:
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tags = e.tags
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assert isinstance(e, model.Polygon)
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tags: typing.Mapping[str, typing.Any] = e.tags
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admin_level_tag = tags.get("admin_level")
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admin_level = (
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admin_level: int | None = (
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int(admin_level_tag)
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if admin_level_tag and admin_level_tag.isdigit()
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else None
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@ -110,22 +127,31 @@ def osm_lookup(elements, lat, lon):
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has_wikidata_tag = [e.tags for e in elements if e.tags.get("wikidata")]
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if len(has_wikidata_tag) != 1:
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return
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return None
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qid = has_wikidata_tag[0]["wikidata"]
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return {
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return typing.cast(
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wikidata.Hit,
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{
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"wikidata": qid,
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"commons_cat": wikidata.qid_to_commons_category(qid),
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"admin_level": admin_level,
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}
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},
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)
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def redirect_to_detail(q: str) -> Response:
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"""Redirect to detail page."""
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lat, lon = [v.strip() for v in q.split(",", 1)]
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return redirect(url_for("detail_page", lat=lat, lon=lon))
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@app.route("/")
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def index():
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def index() -> str | Response:
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"""Index page."""
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q = request.args.get("q")
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if q and q.strip():
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lat, lon = [v.strip() for v in q.split(",", 1)]
|
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return redirect(url_for("detail_page", lat=lat, lon=lon))
|
||||
return redirect_to_detail(q)
|
||||
|
||||
lat, lon = request.args.get("lat"), request.args.get("lon")
|
||||
|
||||
|
|
@ -137,7 +163,8 @@ def index():
|
|||
|
||||
|
||||
@app.route("/random")
|
||||
def random_location():
|
||||
def random_location() -> str:
|
||||
"""Return detail page for random lat/lon."""
|
||||
lat, lon = get_random_lat_lon()
|
||||
|
||||
elements = model.Polygon.coords_within(lat, lon)
|
||||
|
|
@ -149,12 +176,14 @@ def random_location():
|
|||
|
||||
|
||||
@app.route("/wikidata_tag")
|
||||
def wikidata_tag():
|
||||
lat = float(request.args.get("lat"))
|
||||
lon = float(request.args.get("lon"))
|
||||
def wikidata_tag() -> str:
|
||||
"""Lookup Wikidata tag for lat/lon."""
|
||||
lat_str, lon_str = request.args["lat"], request.args["lon"]
|
||||
lat, lon = float(lat_str), float(lon_str)
|
||||
|
||||
scotland_code = scotland.get_scotland_code(lat, lon)
|
||||
|
||||
elements: typing.Any
|
||||
if scotland_code:
|
||||
rows = wikidata.lookup_scottish_parish_in_wikidata(scotland_code)
|
||||
hit = wikidata.commons_from_rows(rows)
|
||||
|
|
@ -170,9 +199,11 @@ def wikidata_tag():
|
|||
|
||||
|
||||
@app.route("/detail")
|
||||
def detail_page():
|
||||
def detail_page() -> Response | str:
|
||||
"""Detail page."""
|
||||
try:
|
||||
lat, lon = [float(request.args.get(param)) for param in ("lat", "lon")]
|
||||
lat_str, lon_str = request.args["lat"], request.args["lon"]
|
||||
lat, lon = float(lat_str), float(lon_str)
|
||||
except TypeError:
|
||||
return redirect(url_for("index"))
|
||||
try:
|
||||
|
|
|
|||
Loading…
Reference in a new issue