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defmodule PowerDNSex.Models.ResourceRecordSet do
alias PowerDNSex.Models.Record
defstruct [:name, :type, :ttl, :records, :changetype]
@permited_attrs [:ttl, :records]
def build(%{records: records} = rrset_attrs) when is_list(records) do
build_rrset(rrset_attrs)
end
def as_body(%__MODULE__{} = rrset) do
%{
rrsets: [
%{
name: rrset.name,
type: rrset.type,
ttl: rrset.ttl,
changetype: rrset.changetype,
records: Record.as_body(rrset.records)
}
]
}
|> Poison.encode!()
end
def find(rrsets, %{} = attrs) when is_list(rrsets) do
Enum.find(rrsets, fn rrset ->
Enum.all?(attrs, fn {attr, attr_value} ->
if Enum.member?(Map.keys(%__MODULE__{}), attr) do
equal_attr?(attr, attr_value, rrset)
else
Record.find(rrset.records, %{attr => attr_value})
end
end)
end)
end
def update(%__MODULE__{} = rrset, %{} = new_attrs) do
Enum.reduce(@permited_attrs, rrset, fn attr_name, rrset ->
case {attr_name, Map.fetch(new_attrs, attr_name)} do
{:records, {:ok, new_value}} ->
%{rrset | attr_name => Record.build(new_value)}
{_, {:ok, new_value}} ->
%{rrset | attr_name => new_value}
_ ->
rrset
end
end)
end
def nameservers(rrsets) do
rrset = Enum.find(rrsets, fn rrset -> rrset.type == "NS" end)
case rrset do
nil -> []
_ -> Enum.map(rrset.records, & &1.content)
end
end
###
# Private
###
#
defp set_attrs(rrset, attr_name, attrs) do
if Map.has_key?(attrs, attr_name) do
attr_value =
case attr_name do
:records -> Record.build(Map.fetch!(attrs, attr_name))
_ -> Map.fetch!(attrs, attr_name)
end
%{rrset | attr_name => attr_value}
else
rrset
end
end
defp equal_attr?(attr, attr_value, rrset) do
attr_atom = if is_binary(attr), do: String.to_atom(attr), else: attr
Map.get(rrset, attr_atom) == attr_value
end
defp build_rrset(rrset_attrs) do
%__MODULE__{}
|> Map.keys()
|> Enum.reduce(%__MODULE__{}, &set_attrs(&2, &1, rrset_attrs))
end
end
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