use bytes::BufMut;
use crate::primitives::fixed::{get_i16, get_i32, put_i16, put_i32};
use crate::primitives::string_bytes::{
compact_nullable_string_len, nullable_string_len, put_compact_nullable_string,
put_nullable_string,
};
use crate::primitives::string_bytes_borrowed::{
get_compact_nullable_string_borrowed, get_nullable_string_borrowed,
};
use crate::tagged_fields::{WriteTaggedFields, read_tagged_fields, tagged_fields_len};
use crate::{DecodeBorrow, Encode, ProtocolError, UnknownTaggedFields};
pub const MIN_VERSION: i16 = 1;
pub const MAX_VERSION: i16 = 2;
pub const FLEXIBLE_MIN: i16 = 2;
#[inline]
fn is_flexible(version: i16) -> bool {
version >= FLEXIBLE_MIN
}
#[derive(Debug, Clone, PartialEq, Eq, Default)]
pub struct RequestHeader<'a> {
pub request_api_key: i16,
pub request_api_version: i16,
pub correlation_id: i32,
pub client_id: Option<&'a str>,
pub unknown_tagged_fields: UnknownTaggedFields,
}
impl RequestHeader<'_> {
pub fn to_owned(&self) -> crate::owned::request_header::RequestHeader {
crate::owned::request_header::RequestHeader {
request_api_key: (self.request_api_key),
request_api_version: (self.request_api_version),
correlation_id: (self.correlation_id),
client_id: (self.client_id).map(std::string::ToString::to_string),
unknown_tagged_fields: self.unknown_tagged_fields.clone(),
}
}
}
impl Encode for RequestHeader<'_> {
fn encode<B: BufMut>(&self, buf: &mut B, version: i16) -> Result<(), ProtocolError> {
if !(MIN_VERSION..=MAX_VERSION).contains(&version) {
return Err(ProtocolError::SchemaMismatch(
"RequestHeader version out of range",
));
}
let flex = is_flexible(version);
if version >= 0 {
put_i16(buf, self.request_api_key);
}
if version >= 0 {
put_i16(buf, self.request_api_version);
}
if version >= 0 {
put_i32(buf, self.correlation_id);
}
if version >= 1 {
{
let flex = false;
if flex {
put_compact_nullable_string(buf, self.client_id);
} else {
put_nullable_string(buf, self.client_id);
}
}
}
if flex {
let tagged = WriteTaggedFields::new();
tagged.write(buf, &self.unknown_tagged_fields);
}
Ok(())
}
fn encoded_len(&self, version: i16) -> usize {
let flex = is_flexible(version);
let mut n: usize = 0;
if version >= 0 {
n += 2;
}
if version >= 0 {
n += 2;
}
if version >= 0 {
n += 4;
}
if version >= 1 {
n += {
let flex = false;
if flex {
compact_nullable_string_len(self.client_id)
} else {
nullable_string_len(self.client_id)
}
};
}
if flex {
let known_pairs: Vec<(u32, usize)> = Vec::new();
n += tagged_fields_len(&known_pairs, &self.unknown_tagged_fields);
}
n
}
}
impl<'de> DecodeBorrow<'de> for RequestHeader<'de> {
fn decode_borrow(buf: &mut &'de [u8], version: i16) -> Result<Self, ProtocolError> {
if !(MIN_VERSION..=MAX_VERSION).contains(&version) {
return Err(ProtocolError::SchemaMismatch(
"RequestHeader version out of range",
));
}
let flex = is_flexible(version);
let mut out = Self::default();
if version >= 0 {
out.request_api_key = get_i16(buf)?;
}
if version >= 0 {
out.request_api_version = get_i16(buf)?;
}
if version >= 0 {
out.correlation_id = get_i32(buf)?;
}
if version >= 1 {
out.client_id = {
let flex = false;
if flex {
get_compact_nullable_string_borrowed(buf)?
} else {
get_nullable_string_borrowed(buf)?
}
};
}
if flex {
out.unknown_tagged_fields = read_tagged_fields(buf, |_tag, _payload| Ok(false))?;
}
Ok(out)
}
}
#[cfg(test)]
impl RequestHeader<'_> {
#[must_use]
pub fn populated(version: i16) -> Self {
let mut m = Self::default();
if version >= 0 {
m.request_api_key = 1i16;
}
if version >= 0 {
m.request_api_version = 1i16;
}
if version >= 0 {
m.correlation_id = 1i32;
}
if version >= 1 {
m.client_id = Some("x");
}
m
}
}