def list_per_dimension(self, request: HttpRequest, system_name: str):
"""
List Units grouped by dimension, filter on key, translated
"""
language = validate_language(
request.GET.get('language', request.LANGUAGE_CODE))
try:
key = request.GET.get('key', None)
user = request.user if \
hasattr(request, 'user') and \
request.user.is_authenticated else None
us = UnitSystem(system_name=system_name,
fmt_locale=language,
user=user,
key=key)
dimensions = [
Dimension(unit_system=us, code=code)
for code in DIMENSIONS.keys()
]
serializer = DimensionWithUnitsSerializer(
dimensions, many=True, context={'request': request})
return Response(serializer.data)
except UnitSystemNotFound as e:
logging.warning(str(e))
return Response('Invalid Unit System',
status=status.HTTP_404_NOT_FOUND)
def list(self, request: HttpRequest, system_name: str):
"""
List Units, ordered, filtered by key or dimension,
translated in language
"""
language = validate_language(
request.GET.get('language', request.LANGUAGE_CODE))
ordering = request.GET.get('ordering', 'name')
descending = False
if ordering and ordering[0] == '-':
ordering = ordering[1:]
descending = True
if ordering not in ['code', 'name']:
ordering = 'name'
try:
key = request.GET.get('key', None)
user = request.user if \
hasattr(request, 'user') and \
request.user.is_authenticated else None
us = UnitSystem(system_name=system_name,
fmt_locale=language,
user=user,
key=key)
units = []
dimension_param = request.GET.get(key='dimension')
if dimension_param:
try:
dimension = Dimension(unit_system=us, code=dimension_param)
units = dimension.units(user=user, key=key)
except DimensionNotFound:
return Response('Invalid dimension filter',
status=status.HTTP_400_BAD_REQUEST)
else:
available_units = us.available_unit_names()
if available_units:
units = [
us.unit(unit_name=unit_name)
for unit_name in available_units
]
units = sorted(units,
key=lambda x: getattr(x, ordering),
reverse=descending)
serializer = UnitSerializer(units,
many=True,
context={'request': request})
return Response(serializer.data)
except UnitSystemNotFound:
return Response('Invalid Unit System',
status=status.HTTP_404_NOT_FOUND)
def dimensions(self, request, system_name):
"""
List Dimensions of a UnitSystem
"""
language = validate_language(
request.GET.get('language', request.LANGUAGE_CODE))
ordering = request.GET.get('ordering', 'name')
try:
us = UnitSystem(system_name=system_name, fmt_locale=language)
serializer = DimensionSerializer(
us.available_dimensions(ordering=ordering),
many=True,
context={'request': request})
return Response(serializer.data, content_type="application/json")
except UnitSystemNotFound as e:
return Response("Unknown unit system: " + str(e),
status=HTTP_404_NOT_FOUND)
def compatible_units(self, request: HttpRequest, system_name: str,
unit_name: str):
"""
List compatible Units
"""
language = validate_language(
request.GET.get('language', request.LANGUAGE_CODE))
ordering = request.GET.get('ordering', 'name')
descending = False
if ordering and ordering[0] == '-':
ordering = ordering[1:]
descending = True
if ordering not in ['code', 'name']:
ordering = 'name'
try:
key = request.GET.get('key', None)
user = request.user if \
hasattr(request, 'user') and \
request.user.is_authenticated else None
us = UnitSystem(system_name=system_name,
fmt_locale=language,
user=user,
key=key)
unit = us.unit(unit_name=unit_name)
compatible_units = sorted([
us.unit(unit_name=cunit)
for cunit in map(str, unit.unit.compatible_units())
],
key=lambda x: getattr(x, ordering),
reverse=descending)
serializer = UnitSerializer(compatible_units,
many=True,
context={'request': request})
return Response(serializer.data, content_type="application/json")
except (UnitSystemNotFound, UnitNotFound):
return Response("Unknown unit", status=HTTP_404_NOT_FOUND)