def index(self, responseFormat='html'):
'Get tags with visible features'
# Get responseFormat
responseFormat = responseFormat.lower()
if responseFormat not in ['json', 'html']:
abort(400, 'Must specify a valid responseFormat: json, html')
# Authenticate via personID or key
personID = h.getPersonIDViaKey()
# Get tags with visible features
c.tags = Session.query(model.Tag).join(model.Tag.features).filter(model.getFeatureFilter(personID)).all()
# If the user wants json,
if responseFormat == 'json':
return '\n'.join(sorted(x.text for x in c.tags))
# If the user wants html,
elif responseFormat == 'html':
return render('/tags/index.mako')
def index(self, responseFormat='html'):
'Get tags with visible features'
# Get responseFormat
responseFormat = responseFormat.lower()
if responseFormat not in ['json', 'html']:
abort(400, 'Must specify a valid responseFormat: json, html')
# Authenticate via personID or key
personID = h.getPersonIDViaKey()
# Get tags with visible features
c.tags = Session.query(model.Tag).join(model.Tag.features).filter(
model.getFeatureFilter(personID)).all()
# If the user wants json,
if responseFormat == 'json':
return '\n'.join(sorted(x.text for x in c.tags))
# If the user wants html,
elif responseFormat == 'html':
return render('/tags/index.mako')
# Define transformation in a metric coordinate system
simplify = lambda x: sa.func.ST_SimplifyPreserveTopology(
geoalchemy.functions.transform(x, 3857), metersPerPixel)
# If simplification is not desired,
else:
simplify = lambda x: x
# Prepare query
featureQuery = restrict(
Session.query(
model.Feature.id,
geoalchemy.functions.wkb(
geoalchemy.functions.transform(
simplify(model.Feature.geometry), srid)),
model.Feature.properties).join(model.Feature.tags).filter(
model.Tag.id.in_([x.id for x in tags])).filter(
model.getFeatureFilter(personID)))
# Prepare map
try:
geojsonFeatures = [
geojson.Feature(
id=featureID,
geometry=shapely.wkb.loads(str(featureWKB)),
properties=featureProperties) for featureID,
featureWKB, featureProperties in featureQuery
]
except sa.exc.InternalError, error:
abort(400, 'Could not execute query (%s)' % str(error))
# Store map in cache
cachedMap = model.Map()
cachedMap.geojson = unicode(
geojson.dumps(geojson.FeatureCollection(geojsonFeatures)),
Session.rollback()
y1, x1, y2, x2 = -20037508.34, -20037508.34, 20037508.34, 20037508.34
else:
y1, x1 = multiPoint.geoms[0].coords[0]
y2, x2 = multiPoint.geoms[1].coords[0]
metersPerPixel = min(abs(x2 - x1), abs(y2 - y1)) / 256.
# If a bounding box is not specified,
else:
metersPerPixel = 0.2
# Define transformation in a metric coordinate system
simplify = lambda x: sa.func.ST_SimplifyPreserveTopology(geoalchemy.functions.transform(x, 3857), metersPerPixel)
# If simplification is not desired,
else:
simplify = lambda x: x
# Prepare query
featureQuery = restrict(Session.query(model.Feature.id, geoalchemy.functions.wkb(geoalchemy.functions.transform(simplify(model.Feature.geometry), srid)), model.Feature.properties).join(model.Feature.tags).filter(model.Tag.id.in_([x.id for x in tags])).filter(model.getFeatureFilter(personID)))
# Prepare map
try:
geojsonFeatures = [geojson.Feature(id=featureID, geometry=shapely.wkb.loads(str(featureWKB)), properties=featureProperties) for featureID, featureWKB, featureProperties in featureQuery]
except sa.exc.InternalError, error:
abort(400, 'Could not execute query (%s)' % str(error))
# Store map in cache
cachedMap = model.Map()
cachedMap.geojson = unicode(geojson.dumps(geojson.FeatureCollection(geojsonFeatures)), 'utf-8')
cachedMap.query_hash = queryStringHash
cachedMap.when_updated = datetime.datetime.utcnow()
Session.add(cachedMap)
Session.commit()
# Return
return cachedMap.geojson.encode('utf-8')
