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use crate::{JsonObject, JsonValue, Result};
use crate::error::Error;
#[derive(Clone, Copy)]
pub enum AvailableHeaders<T> {
Both{protected: T, unprotected: T},
ProtectedOnly(T),
UnprotectedOnly(T),
}
pub type HeadersRef<'a> = AvailableHeaders<&'a JsonObject>;
pub type HeadersMut<'a> = AvailableHeaders<&'a mut JsonObject>;
impl<'a> HeadersRef<'a> {
pub fn protected(&self) -> Option<&'a JsonObject> {
match *self {
AvailableHeaders::Both{protected, ..} => Some(protected),
AvailableHeaders::ProtectedOnly(protected) => Some(protected),
AvailableHeaders::UnprotectedOnly(_) => None,
}
}
pub fn unprotected(&self) -> Option<&'a JsonObject> {
match *self {
AvailableHeaders::Both{unprotected, ..} => Some(unprotected),
AvailableHeaders::UnprotectedOnly(unprotected) => Some(unprotected),
AvailableHeaders::ProtectedOnly(_) => None,
}
}
pub fn get(&self, key: &str) -> Option<&'a JsonValue> {
match *self {
AvailableHeaders::Both{protected, ..} => protected.get(key),
AvailableHeaders::ProtectedOnly(protected) => protected.get(key),
AvailableHeaders::UnprotectedOnly(unprotected) => unprotected.get(key),
}
}
pub fn get_required(&self, key: &str) -> Result<&'a JsonValue> {
let value = self.get(key).ok_or_else(|| Error::missing_header_param(key))?;
Ok(value)
}
pub fn deserialize_required<T: serde::Deserialize<'a> + 'a>(&self, key: &str) -> Result<T> {
let value = self.get_required(key)?;
let value = T::deserialize(value).map_err(|_| Error::invalid_header_param(key))?;
Ok(value)
}
}
impl<'a> HeadersMut<'a> {
pub fn into_ref(self) -> HeadersRef<'a> {
match self {
AvailableHeaders::Both{protected, unprotected} => AvailableHeaders::Both{protected, unprotected},
AvailableHeaders::ProtectedOnly(protected) => AvailableHeaders::ProtectedOnly(protected),
AvailableHeaders::UnprotectedOnly(unprotected) => AvailableHeaders::UnprotectedOnly(unprotected),
}
}
pub fn insert<T>(&mut self, key: String, value: T) -> Option<JsonValue> where
JsonValue: From<T>,
{
let value = JsonValue::from(value);
match self {
AvailableHeaders::Both{protected, unprotected} => {
let in_unprotected = unprotected.remove(&key);
if let Some(old) = protected.insert(key, value) {
Some(old)
} else {
in_unprotected
}
}
AvailableHeaders::ProtectedOnly(protected) => protected.insert(key, value),
AvailableHeaders::UnprotectedOnly(unprotected) => unprotected.insert(key, value),
}
}
pub fn remove<Q>(&mut self, key: &Q) -> Option<JsonValue> where
String: std::borrow::Borrow<Q>,
Q: Ord + ?Sized,
{
match self {
AvailableHeaders::Both{protected, unprotected} => {
let protected = protected.remove(key);
let unprotected = unprotected.remove(key);
if protected.is_some() {
protected
} else {
unprotected
}
}
AvailableHeaders::ProtectedOnly(protected) => protected.remove(key),
AvailableHeaders::UnprotectedOnly(unprotected) => unprotected.remove(key),
}
}
}