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pub(crate) fn generate(
mut writer: impl std::io::Write,
type_name: &str,
map_namespace: &impl crate::MapNamespace,
operation_action: OperationAction,
operation_feature: Option<&str>,
) -> Result<(), crate::Error> {
let local = crate::map_namespace_local_to_string(map_namespace)?;
let metav1 = {
let namespace_parts =
map_namespace.map_namespace(&["io", "k8s", "apimachinery", "pkg", "apis", "meta", "v1"])
.ok_or(r#"unexpected path "io.k8s.apimachinery.pkg.apis.meta.v1""#)?;
let mut result = String::new();
for namespace_part in namespace_parts {
result.push_str(&crate::get_rust_ident(namespace_part));
result.push_str("::");
}
result
};
let type_generics_impl = "<T>";
let type_generics_type = "<T>";
let type_generics_where = match operation_action {
OperationAction::Create |
OperationAction::Delete |
OperationAction::Replace |
OperationAction::Patch |
OperationAction::Watch => format!(" where T: {local}serde::de::DeserializeOwned"),
OperationAction::List => format!(" where T: {local}serde::de::DeserializeOwned + {local}ListableResource"),
};
let operation_feature_attribute: std::borrow::Cow<'static, str> =
operation_feature.map_or("".into(), |operation_feature| format!("#[cfg(feature = {operation_feature:?})]\n").into());
let mut variants = String::new();
let mut variant_match_arms = String::new();
match operation_action {
OperationAction::Create => {
use std::fmt::Write;
writeln!(variants, " Ok(T),")?;
writeln!(variants, " Created(T),")?;
writeln!(variants, " Accepted(T),")?;
variant_match_arms.push_str(&deserialize_single(&local, "OK", type_name, "Ok")?);
variant_match_arms.push_str(&deserialize_single(&local, "CREATED", type_name, "Created")?);
variant_match_arms.push_str(&deserialize_single(&local, "ACCEPTED", type_name, "Accepted")?);
},
OperationAction::Delete => {
use std::fmt::Write;
writeln!(variants, " OkStatus({metav1}Status),")?;
writeln!(variants, " OkValue(T),")?;
writeln!(variants, " Accepted(T),")?;
writeln!(variant_match_arms, " http::StatusCode::OK => {{")?;
writeln!(variant_match_arms, " let result: {local}serde_json::Map<String, {local}serde_json::Value> = match {local}serde_json::from_slice(buf) {{")?;
writeln!(variant_match_arms, " Ok(value) => value,")?;
writeln!(variant_match_arms, " Err(err) if err.is_eof() => return Err({local}ResponseError::NeedMoreData),")?;
writeln!(variant_match_arms, " Err(err) => return Err({local}ResponseError::Json(err)),")?;
writeln!(variant_match_arms, " }};")?;
writeln!(variant_match_arms, r#" let is_status = matches!(result.get("kind"), Some({local}serde_json::Value::String(s)) if s == "Status");"#)?;
writeln!(variant_match_arms, " if is_status {{")?;
writeln!(variant_match_arms, " let result = {local}serde::Deserialize::deserialize({local}serde_json::Value::Object(result));")?;
writeln!(variant_match_arms, " let result = result.map_err({local}ResponseError::Json)?;")?;
writeln!(variant_match_arms, " Ok(({type_name}::OkStatus(result), buf.len()))")?;
writeln!(variant_match_arms, " }}")?;
writeln!(variant_match_arms, " else {{")?;
writeln!(variant_match_arms, " let result = {local}serde::Deserialize::deserialize({local}serde_json::Value::Object(result));")?;
writeln!(variant_match_arms, " let result = result.map_err({local}ResponseError::Json)?;")?;
writeln!(variant_match_arms, " Ok(({type_name}::OkValue(result), buf.len()))")?;
writeln!(variant_match_arms, " }}")?;
writeln!(variant_match_arms, " }},")?;
variant_match_arms.push_str(&deserialize_single(&local, "ACCEPTED", type_name, "Accepted")?);
},
OperationAction::List => {
use std::fmt::Write;
writeln!(variants, " Ok({local}List<T>),")?;
variant_match_arms.push_str(&deserialize_single(&local, "OK", type_name, "Ok")?);
},
OperationAction::Patch => {
use std::fmt::Write;
writeln!(variants, " Ok(T),")?;
writeln!(variants, " Created(T),")?;
variant_match_arms.push_str(&deserialize_single(&local, "OK", type_name, "Ok")?);
variant_match_arms.push_str(&deserialize_single(&local, "CREATED", type_name, "Created")?);
},
OperationAction::Replace => {
use std::fmt::Write;
writeln!(variants, " Ok(T),")?;
writeln!(variants, " Created(T),")?;
variant_match_arms.push_str(&deserialize_single(&local, "OK", type_name, "Ok")?);
variant_match_arms.push_str(&deserialize_single(&local, "CREATED", type_name, "Created")?);
},
OperationAction::Watch => {
use std::fmt::Write;
writeln!(variants, " Ok({metav1}WatchEvent<T>),")?;
writeln!(variant_match_arms, " http::StatusCode::OK => {{")?;
writeln!(variant_match_arms, " let mut deserializer = {local}serde_json::Deserializer::from_slice(buf).into_iter();")?;
writeln!(variant_match_arms, " let (result, byte_offset) = match deserializer.next() {{")?;
writeln!(variant_match_arms, " Some(Ok(value)) => (value, deserializer.byte_offset()),")?;
writeln!(variant_match_arms, " Some(Err(err)) if err.is_eof() => return Err({local}ResponseError::NeedMoreData),")?;
writeln!(variant_match_arms, " Some(Err(err)) => return Err({local}ResponseError::Json(err)),")?;
writeln!(variant_match_arms, " None => return Err({local}ResponseError::NeedMoreData),")?;
writeln!(variant_match_arms, " }};")?;
writeln!(variant_match_arms, " Ok(({type_name}::Ok(result), byte_offset))")?;
writeln!(variant_match_arms, " }},")?;
},
};
writeln!(
writer,
include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/templates/operation_response_common.rs")),
local = local,
type_name = type_name,
type_generics_impl = type_generics_impl,
type_generics_type = type_generics_type,
type_generics_where = type_generics_where,
variants = variants,
operation_feature_attribute = operation_feature_attribute,
variant_match_arms = variant_match_arms,
)?;
Ok(())
}
fn deserialize_single(local: &str, status_code: &str, type_name: &str, variant_name: &str) -> Result<String, std::fmt::Error> {
use std::fmt::Write;
let mut result = String::new();
writeln!(result, " http::StatusCode::{status_code} => {{")?;
writeln!(result, " let result = match {local}serde_json::from_slice(buf) {{")?;
writeln!(result, " Ok(value) => value,")?;
writeln!(result, " Err(err) if err.is_eof() => return Err({local}ResponseError::NeedMoreData),")?;
writeln!(result, " Err(err) => return Err({local}ResponseError::Json(err)),")?;
writeln!(result, " }};")?;
writeln!(result, " Ok(({type_name}::{variant_name}(result), buf.len()))")?;
writeln!(result, " }},")?;
Ok(result)
}
#[derive(Clone, Copy)]
pub(crate) enum OperationAction {
Create,
Delete,
List,
Patch,
Replace,
Watch,
}