1 # SPDX-License-Identifier: GPL-3.0-or-later
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2024 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 Access and helper functions for the status and status log table.
10 from typing import Optional, Tuple, cast
15 from .connection import Connection
16 from ..utils.url_utils import get_url
17 from ..errors import UsageError
18 from ..typing import TypedDict
20 LOG = logging.getLogger()
21 ISODATE_FORMAT = '%Y-%m-%dT%H:%M:%S'
24 class StatusRow(TypedDict):
25 """ Dictionary of columns of the import_status table.
27 lastimportdate: dt.datetime
28 sequence_id: Optional[int]
29 indexed: Optional[bool]
32 def compute_database_date(conn: Connection, offline: bool = False) -> dt.datetime:
33 """ Determine the date of the database from the newest object in the
36 # If there is a date from osm2pgsql available, use that.
37 if conn.table_exists('osm2pgsql_properties'):
38 with conn.cursor() as cur:
39 cur.execute(""" SELECT value FROM osm2pgsql_properties
40 WHERE property = 'current_timestamp' """)
43 return dt.datetime.strptime(row[0], "%Y-%m-%dT%H:%M:%SZ")\
44 .replace(tzinfo=dt.timezone.utc)
47 raise UsageError("Cannot determine database date from data in offline mode.")
49 # Else, find the node with the highest ID in the database
50 with conn.cursor() as cur:
51 if conn.table_exists('place'):
52 osmid = cur.scalar("SELECT max(osm_id) FROM place WHERE osm_type='N'")
54 osmid = cur.scalar("SELECT max(osm_id) FROM placex WHERE osm_type='N'")
57 LOG.fatal("No data found in the database.")
58 raise UsageError("No data found in the database.")
60 LOG.info("Using node id %d for timestamp lookup", osmid)
61 # Get the node from the API to find the timestamp when it was created.
62 node_url = f'https://www.openstreetmap.org/api/0.6/node/{osmid}/1'
63 data = get_url(node_url)
65 match = re.search(r'timestamp="((\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}))Z"', data)
68 LOG.fatal("The node data downloaded from the API does not contain valid data.\n"
69 "URL used: %s", node_url)
70 raise UsageError("Bad API data.")
72 LOG.debug("Found timestamp %s", match.group(1))
74 return dt.datetime.strptime(match.group(1), ISODATE_FORMAT).replace(tzinfo=dt.timezone.utc)
77 def set_status(conn: Connection, date: Optional[dt.datetime],
78 seq: Optional[int] = None, indexed: bool = True) -> None:
79 """ Replace the current status with the given status. If date is `None`
80 then only sequence and indexed will be updated as given. Otherwise
81 the whole status is replaced.
82 The change will be committed to the database.
84 assert date is None or date.tzinfo == dt.timezone.utc
85 with conn.cursor() as cur:
87 cur.execute("UPDATE import_status set sequence_id = %s, indexed = %s",
90 cur.execute("TRUNCATE TABLE import_status")
91 cur.execute("""INSERT INTO import_status (lastimportdate, sequence_id, indexed)
92 VALUES (%s, %s, %s)""", (date, seq, indexed))
97 def get_status(conn: Connection) -> Tuple[Optional[dt.datetime], Optional[int], Optional[bool]]:
98 """ Return the current status as a triple of (date, sequence, indexed).
99 If status has not been set up yet, a triple of None is returned.
101 with conn.cursor() as cur:
102 cur.execute("SELECT * FROM import_status LIMIT 1")
104 return None, None, None
106 row = cast(StatusRow, cur.fetchone())
107 return row['lastimportdate'], row['sequence_id'], row['indexed']
110 def set_indexed(conn: Connection, state: bool) -> None:
111 """ Set the indexed flag in the status table to the given state.
113 with conn.cursor() as cur:
114 cur.execute("UPDATE import_status SET indexed = %s", (state, ))
118 def log_status(conn: Connection, start: dt.datetime,
119 event: str, batchsize: Optional[int] = None) -> None:
120 """ Write a new status line to the `import_osmosis_log` table.
122 with conn.cursor() as cur:
123 cur.execute("""INSERT INTO import_osmosis_log
124 (batchend, batchseq, batchsize, starttime, endtime, event)
125 SELECT lastimportdate, sequence_id, %s, %s, now(), %s FROM import_status""",
126 (batchsize, start, event))