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Update python function to filter geojson, add parameter to filter on LineString or Point

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Still pending work using pg type and transform json
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xbgmsharp
2023-04-01 19:25:43 +02:00
parent 2f6bb6d5d9
commit bda652b87e
1 changed files with 11 additions and 9 deletions
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20
initdb/02_3_3_signalk_public_functions_py.sql
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@@ -387,21 +387,23 @@ COMMENT ON FUNCTION
---------------------------------------------------------------------------
-- python geojson parser
--
--CREATE TYPE geometry_type AS ENUM ('LineString', 'Point');
DROP FUNCTION IF EXISTS geojson_py_fn;
CREATE OR REPLACE FUNCTION geojson_py_fn(original JSONB) RETURNS JSONB LANGUAGE plpython3u
CREATE OR REPLACE FUNCTION geojson_py_fn(IN original JSONB, IN geometry_type TEXT) RETURNS JSONB LANGUAGE plpython3u
AS $geojson_py$
import json
parsed = json.loads(original)
output = []
for i, item in enumerate(parsed):
for geom in item:
#print(geom)
if geom['geometry']['type'] == 'LineString':
#plpy.notice('deleting...')
parsed[i].remove(geom)
output += parsed[i]
for idx, x in enumerate(parsed):
#plpy.notice(idx, x)
for feature in x:
#plpy.notice(feature)
if (feature['geometry']['type'] != geometry_type):
output.append(feature)
#else:
# plpy.notice('ignoring')
return json.dumps(output)
$geojson_py$
$geojson_py$ -- TRANSFORM FOR TYPE jsonb LANGUAGE plpython3u;
IMMUTABLE STRICT;
-- Description
COMMENT ON FUNCTION