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use std::{collections::HashMap, convert::TryFrom, sync::Arc};
use crate::xds::envoy::config::core::v3::Metadata as ProtoMetadata;
pub type DynamicMetadata = HashMap<Arc<String>, Value>;
pub const KEY: &str = "quilkin.dev";
#[derive(
Clone, Debug, PartialOrd, serde::Serialize, serde::Deserialize, Eq, Ord, schemars::JsonSchema,
)]
#[serde(untagged)]
pub enum Value {
Bool(bool),
Number(u64),
List(Vec<Value>),
String(String),
Bytes(bytes::Bytes),
}
impl Value {
pub fn as_bytes(&self) -> Option<&bytes::Bytes> {
match self {
Self::Bytes(value) => Some(value),
_ => None,
}
}
pub fn as_string(&self) -> Option<&str> {
match self {
Self::String(value) => Some(value),
_ => None,
}
}
pub fn as_mut_string(&mut self) -> Option<&mut String> {
match self {
Self::String(value) => Some(value),
_ => None,
}
}
}
macro_rules! from_value {
(($name:ident) { $($typ:ty => $ex:expr),+ $(,)? }) => {
$(
impl From<$typ> for Value {
fn from($name: $typ) -> Self {
$ex
}
}
)+
}
}
from_value! {
(value) {
bool => Self::Bool(value),
u64 => Self::Number(value),
Vec<Self> => Self::List(value),
String => Self::String(value),
&str => Self::String(value.into()),
bytes::Bytes => Self::Bytes(value),
}
}
impl<const N: usize> From<[u8; N]> for Value {
fn from(value: [u8; N]) -> Self {
Self::Bytes(bytes::Bytes::copy_from_slice(&value))
}
}
impl<const N: usize> From<&[u8; N]> for Value {
fn from(value: &[u8; N]) -> Self {
Self::Bytes(bytes::Bytes::copy_from_slice(value))
}
}
impl PartialEq for Value {
fn eq(&self, other: &Self) -> bool {
match (self, other) {
(Self::Bool(a), Self::Bool(b)) => a == b,
(Self::Bool(_), _) => false,
(Self::Number(a), Self::Number(b)) => a == b,
(Self::Number(_), _) => false,
(Self::List(a), Self::List(b)) => a == b,
(Self::List(_), _) => false,
(Self::String(a), Self::String(b)) => a == b,
(Self::Bytes(a), Self::Bytes(b)) => a == b,
(Self::String(a), Self::Bytes(b)) | (Self::Bytes(b), Self::String(a)) => a == b,
(Self::String(_), _) => false,
(Self::Bytes(_), _) => false,
}
}
}
impl TryFrom<prost_types::Value> for Value {
type Error = eyre::Report;
fn try_from(value: prost_types::Value) -> Result<Self, Self::Error> {
use prost_types::value::Kind;
let value = match value.kind {
Some(value) => value,
None => return Err(eyre::eyre!("unexpected missing value")),
};
match value {
Kind::NullValue(_) => Err(eyre::eyre!("unexpected missing value")),
Kind::NumberValue(number) => Ok(Self::Number(number as u64)),
Kind::StringValue(string) => Ok(Self::String(string)),
Kind::BoolValue(value) => Ok(Self::Bool(value)),
Kind::ListValue(list) => Ok(Self::List(
list.values
.into_iter()
.map(prost_types::Value::try_into)
.collect::<crate::Result<_>>()?,
)),
Kind::StructValue(_) => Err(eyre::eyre!("unexpected struct value")),
}
}
}
#[derive(
Default, Debug, serde::Deserialize, serde::Serialize, PartialEq, Clone, PartialOrd, Eq,
)]
#[non_exhaustive]
pub struct MetadataView<T> {
#[serde(default, rename = "quilkin.dev")]
pub known: T,
#[serde(flatten)]
pub unknown: serde_yaml::Mapping,
}
impl<T> MetadataView<T> {
pub fn with_unknown(known: impl Into<T>, unknown: serde_yaml::Mapping) -> Self {
Self {
known: known.into(),
unknown,
}
}
}
impl<T, E> From<T> for MetadataView<T>
where
T: TryFrom<prost_types::Struct, Error = E> + Default,
{
fn from(known: T) -> Self {
Self {
known,
unknown: <_>::default(),
}
}
}
impl<T, E> TryFrom<ProtoMetadata> for MetadataView<T>
where
T: TryFrom<prost_types::Struct, Error = E> + Default,
{
type Error = E;
fn try_from(mut value: ProtoMetadata) -> Result<Self, Self::Error> {
let known = value
.filter_metadata
.remove(KEY)
.map(T::try_from)
.transpose()?
.unwrap_or_default();
let value = prost_types::value::Kind::StructValue(prost_types::Struct {
fields: value
.filter_metadata
.into_iter()
.map(|(k, v)| {
(
k,
prost_types::Value {
kind: Some(prost_types::value::Kind::StructValue(v)),
},
)
})
.collect(),
});
Ok(Self {
known,
unknown: crate::prost::mapping_from_kind(value).unwrap_or_default(),
})
}
}