436 lines
15 KiB
Python
436 lines
15 KiB
Python
import itertools
|
|
import json
|
|
|
|
from flask import g, jsonify
|
|
|
|
from config import (
|
|
AUTOSPLIT_TABLE as autosplit_table,
|
|
BORDERS_TABLE as borders_table,
|
|
OSM_TABLE as osm_table,
|
|
)
|
|
from auto_split import split_region
|
|
from subregions import (
|
|
get_parent_region_id,
|
|
get_region_country,
|
|
get_subregions_info,
|
|
is_administrative_region,
|
|
update_border_mwm_size_estimation,
|
|
)
|
|
|
|
|
|
def geom_intersects_bbox_sql(xmin, ymin, xmax, ymax):
|
|
return (f'(geom && ST_MakeBox2D(ST_Point({xmin}, {ymin}),'
|
|
f'ST_Point({xmax}, {ymax})))')
|
|
|
|
|
|
def fetch_borders(**kwargs):
|
|
a_borders_table = kwargs.get('table', borders_table)
|
|
simplify = kwargs.get('simplify', 0)
|
|
where_clause = kwargs.get('where_clause', '1=1')
|
|
only_leaves = kwargs.get('only_leaves', True)
|
|
geom = (f'ST_SimplifyPreserveTopology(geom, {simplify})'
|
|
if simplify > 0 else 'geom')
|
|
leaves_filter = (f""" AND id NOT IN (SELECT parent_id FROM {a_borders_table}
|
|
WHERE parent_id IS NOT NULL)"""
|
|
if only_leaves else '')
|
|
query = f"""
|
|
SELECT name, geometry, nodes, modified, disabled, count_k, cmnt,
|
|
(CASE WHEN area = 'NaN'::DOUBLE PRECISION THEN 0 ELSE area END) AS area,
|
|
id, admin_level, parent_id, parent_name, parent_admin_level,
|
|
mwm_size_est
|
|
FROM (
|
|
SELECT name,
|
|
ST_AsGeoJSON({geom}, 7) as geometry,
|
|
ST_NPoints(geom) AS nodes,
|
|
modified,
|
|
disabled,
|
|
count_k,
|
|
cmnt,
|
|
round(ST_Area(geography(geom))) AS area,
|
|
id,
|
|
( SELECT admin_level FROM {osm_table}
|
|
WHERE osm_id = t.id
|
|
) AS admin_level,
|
|
parent_id,
|
|
( SELECT name FROM {a_borders_table}
|
|
WHERE id = t.parent_id
|
|
) AS parent_name,
|
|
( SELECT admin_level FROM {osm_table}
|
|
WHERE osm_id = (SELECT parent_id FROM {a_borders_table} WHERE id = t.id)
|
|
) AS parent_admin_level,
|
|
mwm_size_est
|
|
FROM {a_borders_table} t
|
|
WHERE ({where_clause}) {leaves_filter}
|
|
) q
|
|
ORDER BY area DESC
|
|
"""
|
|
with g.conn.cursor() as cursor:
|
|
cursor.execute(query)
|
|
borders = []
|
|
for rec in cursor:
|
|
region_id = rec[8]
|
|
country_id, country_name = get_region_country(g.conn, region_id)
|
|
props = { 'name': rec[0] or '', 'nodes': rec[2], 'modified': rec[3],
|
|
'disabled': rec[4], 'count_k': rec[5],
|
|
'comment': rec[6],
|
|
'area': rec[7],
|
|
'id': region_id,
|
|
'admin_level': rec[9],
|
|
'parent_id': rec[10],
|
|
'parent_name': rec[11],
|
|
'parent_admin_level': rec[12],
|
|
'country_id': country_id,
|
|
'country_name': country_name,
|
|
'mwm_size_est': rec[13]
|
|
}
|
|
feature = {'type': 'Feature',
|
|
'geometry': json.loads(rec[1]),
|
|
'properties': props
|
|
}
|
|
borders.append(feature)
|
|
return borders
|
|
|
|
|
|
def simplify_level_to_postgis_value(simplify_level):
|
|
return (
|
|
0.1 if simplify_level == '2'
|
|
else 0.01 if simplify_level == '1'
|
|
else 0
|
|
)
|
|
|
|
|
|
def get_subregions_for_preview(region_ids, next_level):
|
|
subregions = list(itertools.chain.from_iterable(
|
|
get_subregions_one_for_preview(region_id, next_level)
|
|
for region_id in region_ids
|
|
))
|
|
return subregions
|
|
|
|
|
|
def get_subregions_one_for_preview(region_id, next_level):
|
|
with g.conn.cursor() as cursor:
|
|
# We use ST_SimplifyPreserveTopology, since ST_Simplify would give NULL
|
|
# for very little regions.
|
|
cursor.execute(f"""
|
|
SELECT name,
|
|
ST_AsGeoJSON(ST_SimplifyPreserveTopology(way, 0.01)) as way,
|
|
osm_id
|
|
FROM {osm_table}
|
|
WHERE ST_Contains(
|
|
(SELECT geom FROM {borders_table} WHERE id = %s), way
|
|
)
|
|
AND admin_level = %s
|
|
""", (region_id, next_level)
|
|
)
|
|
subregions = []
|
|
for rec in cursor:
|
|
feature = {'type': 'Feature', 'geometry': json.loads(rec[1]),
|
|
'properties': {'name': rec[0]}}
|
|
subregions.append(feature)
|
|
return subregions
|
|
|
|
|
|
def get_clusters_for_preview(region_ids, next_level, thresholds):
|
|
clusters = list(itertools.chain.from_iterable(
|
|
get_clusters_for_preview_one(region_id, next_level, thresholds)
|
|
for region_id in region_ids
|
|
))
|
|
return clusters
|
|
|
|
|
|
def get_clusters_for_preview_one(region_id, next_level, mwm_size_thr):
|
|
where_clause = f"""
|
|
osm_border_id = %s
|
|
AND mwm_size_thr = %s
|
|
AND next_level = %s
|
|
"""
|
|
splitting_sql_params = (region_id, mwm_size_thr, next_level)
|
|
with g.conn.cursor() as cursor:
|
|
cursor.execute(f"""
|
|
SELECT 1 FROM {autosplit_table}
|
|
WHERE {where_clause}
|
|
""", splitting_sql_params
|
|
)
|
|
if cursor.rowcount == 0:
|
|
split_region(g.conn, region_id, next_level, mwm_size_thr)
|
|
|
|
cursor.execute(f"""
|
|
SELECT subregion_ids[1],
|
|
ST_AsGeoJSON(ST_SimplifyPreserveTopology(geom, 0.01)) as way
|
|
FROM {autosplit_table}
|
|
WHERE {where_clause}
|
|
""", splitting_sql_params
|
|
)
|
|
clusters = []
|
|
for rec in cursor:
|
|
cluster = {
|
|
'type': 'Feature',
|
|
'geometry': json.loads(rec[1]),
|
|
'properties': {'osm_id': int(rec[0])}
|
|
}
|
|
clusters.append(cluster)
|
|
return clusters
|
|
|
|
|
|
def divide_into_subregions_preview(region_ids, next_level):
|
|
subregions = get_subregions_for_preview(region_ids, next_level)
|
|
return jsonify(
|
|
status='ok',
|
|
subregions={'type': 'FeatureCollection', 'features': subregions}
|
|
)
|
|
|
|
|
|
def divide_into_clusters_preview(region_ids, next_level, mwm_size_thr):
|
|
subregions = get_subregions_for_preview(region_ids, next_level)
|
|
clusters = get_clusters_for_preview(region_ids, next_level, mwm_size_thr)
|
|
return jsonify(
|
|
status='ok',
|
|
subregions={'type': 'FeatureCollection', 'features': subregions},
|
|
clusters={'type': 'FeatureCollection', 'features': clusters}
|
|
)
|
|
|
|
|
|
def divide_into_subregions(region_ids, next_level):
|
|
for region_id in region_ids:
|
|
divide_region_into_subregions(g.conn, region_id, next_level)
|
|
g.conn.commit()
|
|
return jsonify(status='ok')
|
|
|
|
|
|
def divide_region_into_subregions(conn, region_id, next_level):
|
|
"""Divides a region into subregions of specified admin level.
|
|
Returns the list of added subregion ids.
|
|
"""
|
|
subregions = get_subregions_info(conn, region_id, borders_table,
|
|
next_level, need_cities=False)
|
|
if not subregions:
|
|
return []
|
|
with conn.cursor() as cursor:
|
|
subregion_ids_str = ','.join(str(x) for x in subregions.keys())
|
|
cursor.execute(f"""
|
|
SELECT id
|
|
FROM {borders_table}
|
|
WHERE id IN ({subregion_ids_str})
|
|
"""
|
|
)
|
|
occupied_ids = [rec[0] for rec in cursor]
|
|
ids_to_insert = set(subregions.keys()) - set(occupied_ids)
|
|
if not ids_to_insert:
|
|
return []
|
|
|
|
is_admin_region = is_administrative_region(conn, region_id)
|
|
|
|
if is_admin_region:
|
|
parent_id = region_id
|
|
else:
|
|
parent_id = get_parent_region_id(conn, region_id)
|
|
|
|
for subregion_id in ids_to_insert:
|
|
mwm_size_est = subregions[subregion_id]['mwm_size_est']
|
|
cursor.execute(f"""
|
|
INSERT INTO {borders_table}
|
|
(id, geom, name, parent_id, modified, count_k, mwm_size_est)
|
|
SELECT osm_id, way, name, {parent_id}, now(), -1, %s
|
|
FROM {osm_table}
|
|
WHERE osm_id = %s""", (mwm_size_est, subregion_id,)
|
|
)
|
|
if not is_admin_region:
|
|
cursor.execute(f"DELETE FROM {borders_table} WHERE id = %s", (region_id,))
|
|
return ids_to_insert
|
|
|
|
|
|
def divide_into_clusters(region_ids, next_level, mwm_size_thr):
|
|
cursor = g.conn.cursor()
|
|
insert_cursor = g.conn.cursor()
|
|
for region_id in region_ids:
|
|
cursor.execute(f"SELECT name FROM {borders_table} WHERE id = %s", (region_id,))
|
|
base_name = cursor.fetchone()[0]
|
|
|
|
where_clause = f"""
|
|
osm_border_id = %s
|
|
AND mwm_size_thr = %s
|
|
AND next_level = %s
|
|
"""
|
|
splitting_sql_params = (region_id, mwm_size_thr, next_level)
|
|
cursor.execute(f"""
|
|
SELECT 1 FROM {autosplit_table}
|
|
WHERE {where_clause}
|
|
""", splitting_sql_params
|
|
)
|
|
if cursor.rowcount == 0:
|
|
split_region(g.conn, region_id, next_level, mwm_size_thr)
|
|
|
|
free_id = get_free_id()
|
|
counter = 0
|
|
cursor.execute(f"""
|
|
SELECT subregion_ids
|
|
FROM {autosplit_table} WHERE {where_clause}
|
|
""", splitting_sql_params
|
|
)
|
|
if cursor.rowcount == 1:
|
|
insert_cursor.execute(f"""
|
|
UPDATE {borders_table}
|
|
SET modified = now(),
|
|
mwm_size_est = (SELECT mwm_size_est
|
|
FROM {autosplit_table}
|
|
WHERE {where_clause})
|
|
WHERE id = {region_id}
|
|
""", splitting_sql_params)
|
|
else:
|
|
for rec in cursor:
|
|
subregion_ids = rec[0]
|
|
cluster_id = subregion_ids[0]
|
|
if len(subregion_ids) == 1:
|
|
subregion_id = cluster_id
|
|
name = get_osm_border_name_by_osm_id(g.conn, subregion_id)
|
|
else:
|
|
counter += 1
|
|
free_id -= 1
|
|
subregion_id = free_id
|
|
name = f"{base_name}_{counter}"
|
|
insert_cursor.execute(f"""
|
|
INSERT INTO {borders_table} (id, name, parent_id, geom, modified, count_k, mwm_size_est)
|
|
SELECT {subregion_id}, %s, osm_border_id, geom, now(), -1, mwm_size_est
|
|
FROM {autosplit_table} WHERE subregion_ids[1] = %s AND {where_clause}
|
|
""", (name, cluster_id,) + splitting_sql_params
|
|
)
|
|
g.conn.commit()
|
|
return jsonify(status='ok')
|
|
|
|
|
|
def get_free_id():
|
|
with g.conn.cursor() as cursor:
|
|
cursor.execute(f"SELECT min(id) FROM {borders_table} WHERE id < -1000000000")
|
|
min_id = cursor.fetchone()[0]
|
|
free_id = min_id - 1 if min_id else -1_000_000_001
|
|
return free_id
|
|
|
|
|
|
def assign_region_to_lowest_parent(conn, region_id):
|
|
"""Lowest parent is the region with lowest (maximum by absolute value)
|
|
admin_level containing given region."""
|
|
pot_parents = find_potential_parents(region_id)
|
|
if pot_parents:
|
|
# potential_parents are sorted by area ascending
|
|
parent_id = pot_parents[0]['properties']['id']
|
|
with conn.cursor() as cursor:
|
|
cursor.execute(f"""
|
|
UPDATE {borders_table}
|
|
SET parent_id = %s
|
|
WHERE id = %s
|
|
""", (parent_id, region_id)
|
|
)
|
|
return True
|
|
return False
|
|
|
|
|
|
def create_or_update_region(region, free_id):
|
|
with g.conn.cursor() as cursor:
|
|
if region['id'] < 0:
|
|
if not free_id:
|
|
free_id = get_free_id()
|
|
region_id = free_id
|
|
|
|
cursor.execute(f"""
|
|
INSERT INTO {borders_table}
|
|
(id, name, disabled, geom, modified, count_k)
|
|
VALUES (%s, %s, %s, ST_GeomFromText(%s, 4326), now(), -1)
|
|
""", (region_id, region['name'],
|
|
region['disabled'], region['wkt'])
|
|
)
|
|
assign_region_to_lowest_parent(g.conn, region_id)
|
|
return region_id
|
|
else:
|
|
cursor.execute(f"SELECT count(1) FROM {borders_table} WHERE id = %s",
|
|
(-region['id'],))
|
|
rec = cursor.fetchone()
|
|
if rec[0] == 0:
|
|
raise Exception(f"Can't find border ({region['id']}) for update")
|
|
cursor.execute(f"""
|
|
UPDATE {borders_table}
|
|
SET disabled = %s,
|
|
name = %s,
|
|
modified = now(),
|
|
count_k = -1,
|
|
geom = ST_GeomFromText(%s, 4326)
|
|
WHERE id = %s
|
|
""", (region['disabled'], region['name'],
|
|
region['wkt'], -region['id'])
|
|
)
|
|
return region['id']
|
|
|
|
|
|
def find_potential_parents(region_id):
|
|
p_geogr = "geography(p.geom)"
|
|
c_geogr = "geography(c.geom)"
|
|
query = f"""
|
|
SELECT
|
|
p.id,
|
|
p.name,
|
|
(SELECT admin_level FROM {osm_table} WHERE osm_id = p.id) admin_level,
|
|
ST_AsGeoJSON(ST_SimplifyPreserveTopology(p.geom, 0.01)) geometry
|
|
FROM {borders_table} p, {borders_table} c
|
|
WHERE c.id = %s
|
|
AND ST_Intersects(p.geom, c.geom)
|
|
AND ST_Area({p_geogr}) > ST_Area({c_geogr})
|
|
AND ST_Area(ST_Intersection({p_geogr}, {c_geogr})) >
|
|
0.5 * ST_Area({c_geogr})
|
|
ORDER BY ST_Area({p_geogr})
|
|
"""
|
|
with g.conn.cursor() as cursor:
|
|
cursor.execute(query, (region_id,))
|
|
parents = []
|
|
for rec in cursor:
|
|
props = {
|
|
'id': rec[0],
|
|
'name': rec[1],
|
|
'admin_level': rec[2],
|
|
}
|
|
feature = {
|
|
'type': 'Feature',
|
|
'geometry': json.loads(rec[3]),
|
|
'properties': props
|
|
}
|
|
parents.append(feature)
|
|
return parents
|
|
|
|
|
|
def copy_region_from_osm(conn, region_id, name=None, parent_id='not_passed'):
|
|
errors, warnings = [], []
|
|
with conn.cursor() as cursor:
|
|
# Check if this id already in use
|
|
cursor.execute(f"SELECT name FROM {borders_table} WHERE id = %s",
|
|
(region_id,))
|
|
if cursor.rowcount > 0:
|
|
name = cursor.fetchone()[0]
|
|
errors.append(f"Region with id={region_id} already exists under name '{name}'")
|
|
return errors, warnings
|
|
|
|
name_expr = f"'{name}'" if name else "name"
|
|
parent_id_expr = f"{parent_id}" if isinstance(parent_id, int) else "NULL"
|
|
cursor.execute(f"""
|
|
INSERT INTO {borders_table}
|
|
(id, geom, name, parent_id, modified, count_k)
|
|
SELECT osm_id, way, {name_expr}, {parent_id_expr}, now(), -1
|
|
FROM {osm_table}
|
|
WHERE osm_id = %s
|
|
""", (region_id,)
|
|
)
|
|
if parent_id == 'not_passed':
|
|
assign_region_to_lowest_parent(conn, region_id)
|
|
try:
|
|
update_border_mwm_size_estimation(conn, region_id)
|
|
except Exception as e:
|
|
warnings.append(str(e))
|
|
return errors, warnings
|
|
|
|
|
|
def get_osm_border_name_by_osm_id(conn, osm_id):
|
|
with conn.cursor() as cursor:
|
|
cursor.execute(f"""
|
|
SELECT name FROM {osm_table}
|
|
WHERE osm_id = %s
|
|
""", (osm_id,))
|
|
rec = cursor.fetchone()
|
|
return rec[0] if rec else None
|
|
|