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search events on type, what, when, where

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This commit is contained in:
Christian Quest 2016-05-06 20:51:46 +02:00
parent 81dbb18ef4
commit 24e8d28117
1 changed files with 35 additions and 13 deletions
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48
backend.py
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@ -55,29 +55,51 @@ class EventResource(object):
db = db_connect()
cur = db.cursor()
if id is None:
# get query search parameters
if 'bbox' in req.params:
bbox = req.params['bbox']
cur.execute("""
SELECT '{"type":"Feature", "properties": '|| (events_tags::jsonb || jsonb_build_object('id',events_id,'createdate',createdate,'lastupdate',lastupdate))::text ||', "geometry":'|| st_asgeojson(st_centroid(geom)) ||' }' as feature
FROM events
JOIN geo ON (hash=events_geo) and geom && ST_SetSRID(ST_MakeBox2D(ST_Point(%s,%s),ST_Point(%s,%s)),4326)
WHERE events_when @> tstzrange(now(), now(),'[]')
ORDER BY createdate DESC
LIMIT 50;
""", tuple(bbox))
# limit search with bbox (E,S,W,N)
event_bbox = cur.mogrify(" AND geom && ST_SetSRID(ST_MakeBox2D(ST_Point(%s,%s),ST_Point(%s,%s)),4326) ",tuple(req.params['bbox']))
else:
cur.execute("""
event_bbox = ""
if 'near' in req.params:
# limit search with location+distance (long, lat, distance in meters)
event_bbox = cur.mogrify(" AND geom && st_expand(st_buffer(st_setsrid(st_makepoint(%s,%s),4326)::geography,%s)::geometry,0) ",tuple(req.params['near']))
else:
event_bbox = ""
if 'when' in req.params:
# limit search with fixed time
event_when = cur.mogrify("tstzrange(%s,%s,'[]')",(req.params['when'],req.params['when']))
else:
event_when = "'[now(),now()]'"
if 'what' in req.params:
# limit search based on "what"
event_what = cur.mogrify(" AND events_what LIKE %s ",(req.params['what']+"%",))
else:
event_what = ""
if 'type' in req.params:
# limit search based on type (scheduled, forecast, unscheduled)
event_type = cur.mogrify(" AND events_type = %s ",(req.params['type'],))
else:
event_type = ""
# search recent active events
cur.execute("""
SELECT '{"type":"Feature", "properties": '|| (events_tags::jsonb || jsonb_build_object('id',events_id,'createdate',createdate,'lastupdate',lastupdate))::text ||', "geometry":'|| st_asgeojson(st_centroid(geom)) ||' }' as feature
FROM events
JOIN geo ON (hash=events_geo)
WHERE events_when @> tstzrange(now(), now(),'[]')
JOIN geo ON (hash=events_geo) """ + event_bbox +"""
WHERE events_when @> """+ event_when + event_what + event_type +"""
ORDER BY createdate DESC
LIMIT 50;
""")
resp.body = '{"type": "FeatureCollection","features": ['+','.join([x[0] for x in cur.fetchall()])+']}'
resp.status = falcon.HTTP_200
else:
# get event geojson Feature
# get single event geojson Feature by id
cur.execute("""
SELECT format('{"type":"Feature", "properties": '|| (events_tags::jsonb || jsonb_build_object('id',events_id,'createdate',createdate,'lastupdate',lastupdate))::text ||', "geometry":'|| st_asgeojson(geom)) ||' }'
FROM events