[change] Remove redundant code for checking view permissions

[ManishShah120]

openwisp-network-topology/openwisp_network_topology/api/views.py

Lines 31 to 52 in 3c34047

	class HasGetMethodPermission(BasePermission):
	def has_permission(self, request, view):
	return self.check_permission(request)
	def has_object_permission(self, request, view, obj):
	return self.check_permission(request)
	def check_permission(self, request):
	user = request.user
	app_label = Topology._meta.app_label.lower()
	model = Topology._meta.object_name.lower()
	change_perm = f'{app_label}.change_{model}'
	view_perm = f'{app_label}.view_{model}'
	if user.is_authenticated:
	if user.is_superuser or request.method != 'GET':
	return True
	if request.method == 'GET' and (
	user.has_permission(change_perm) or user.has_permission(view_perm)
	):
	return True
	return False

I guess, this portion of code does the same thing as what we did recently in this PR openwisp/openwisp-users#251

So, will it not better if we simply import it from there?

[nemesifier]

openwisp-network-topology/openwisp_network_topology/api/views.py

Lines 31 to 52 in 3c34047

	class HasGetMethodPermission(BasePermission):
	def has_permission(self, request, view):
	return self.check_permission(request)
	def has_object_permission(self, request, view, obj):
	return self.check_permission(request)
	def check_permission(self, request):
	user = request.user
	app_label = Topology._meta.app_label.lower()
	model = Topology._meta.object_name.lower()
	change_perm = f'{app_label}.change_{model}'
	view_perm = f'{app_label}.view_{model}'
	if user.is_authenticated:
	if user.is_superuser or request.method != 'GET':
	return True
	if request.method == 'GET' and (
	user.has_permission(change_perm) or user.has_permission(view_perm)
	):
	return True
	return False

I guess, this portion of code does the same thing as what we did recently in this PR openwisp/openwisp-users#251

So, will it not better if we simply import it from there?

This code was added before we introduced openwisp/openwisp-users#251 so yes, it will have to be updated.