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A fast, easy to use and 100% conformant Elixir library for Google Protocol Buffers (aka protobuf)
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lib/google/protobuf/timestamp.ex
defmodule Protox.Google.Protobuf.Timestamp do
@moduledoc false
use Protox.Define,
enums: [],
messages: [
{
Google.Protobuf.Timestamp,
:proto3,
[
Protox.Field.new!(
kind: {:scalar, 0},
label: :optional,
name: :seconds,
tag: 1,
type: :int64
),
Protox.Field.new!(
kind: {:scalar, 0},
label: :optional,
name: :nanos,
tag: 2,
type: :int32
)
]
}
]
end
defimpl Protox.JsonMessageDecoder, for: Google.Protobuf.Timestamp do
def decode_message(_initial_message, nil), do: nil
def decode_message(initial_message, json) do
if not String.contains?(json, "T") do
raise Protox.JsonDecodingError.new("Missing 'T' in timestamp")
end
date_time =
case DateTime.from_iso8601(json) do
{:ok, dt, _offset} ->
dt
_ ->
raise Protox.JsonDecodingError.new(
"invalid timestamp (format or greater than 9999-12-31T23:59:59.999999999Z)"
)
end
unix_timestamp = DateTime.to_unix(date_time, :nanosecond)
# 0001-01-01T00:00:00Z as UNIX date in nanoseconds
if unix_timestamp < -62_135_596_800_000_000_000 do
raise Protox.JsonDecodingError.new("timestamp is < 0001-01-01T00:00:00Z")
else
nanos = rem(unix_timestamp, 1_000_000_000)
seconds = div(unix_timestamp, 1_000_000_000)
struct!(initial_message, seconds: seconds, nanos: nanos)
end
end
end
defimpl Protox.JsonMessageEncoder, for: Google.Protobuf.Timestamp do
def encode_message(msg, json_encode) do
unix_timestamp = msg.seconds * 1_000_000_000 + msg.nanos
cond do
# 9999-12-31T23:59:59.999999999Z as UNIX date in nanoseconds
unix_timestamp > 253_402_300_799_999_999_000 ->
raise Protox.JsonEncodingError.new("{msg.__struct__} is > 9999-12-31T23:59:59.999999999Z")
# 0001-01-01T00:00:00Z as UNIX date in nanoseconds
unix_timestamp < -62_135_596_800_000_000_000 ->
raise Protox.JsonEncodingError.new("{msg.__struct__} is < 0001-01-01T00:00:00Z")
true ->
unix_timestamp
|> DateTime.from_unix!(:nanosecond)
|> DateTime.to_iso8601()
|> json_encode.()
end
end
end