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use std::fmt::Debug;
use anyhow::Result;
use aws_sdk_route53::types::{Change, ChangeAction, ChangeBatch};
// Needed until try_collect is stable, see <https://github.com/rust-lang/rust/issues/94047>
use itertools::Itertools;
use crate::route53::{ResourceRecordSet, Route53};
#[derive(Debug)]
pub struct Transaction<T> {
pub zone_id: String,
pub changes: Changes<T>,
}
#[derive(Debug)]
pub struct Changes<T> {
pub remove: T,
pub insert: T,
}
pub enum ApplyMode {
DryRun,
Apply,
}
impl ApplyMode {
pub async fn apply<C, R>(&self, aws_context: &C, transaction: Transaction<R>) -> Result<()>
where
C: Route53,
R: IntoIterator<Item = ResourceRecordSet> + Debug,
{
match self {
ApplyMode::DryRun => dry_run(transaction).await,
ApplyMode::Apply => apply(aws_context, transaction).await,
}
}
}
async fn dry_run<R>(transaction: Transaction<R>) -> Result<()>
where
R: IntoIterator<Item = ResourceRecordSet> + Debug,
{
println!("ZONE: {}", transaction.zone_id);
println!("REMOVE: {:#?}", transaction.changes.remove);
println!("INSERT: {:#?}", transaction.changes.insert);
Ok(())
}
async fn apply<C, R>(aws_context: &C, transaction: Transaction<R>) -> Result<()>
where
C: Route53,
R: IntoIterator<Item = ResourceRecordSet>,
{
let Changes {
remove: remove_records,
insert: insert_records,
} = transaction.changes;
let remove_records = remove_records.into_iter().map(|record| {
Change::builder()
.action(ChangeAction::Delete) // <--
.resource_record_set(record.into())
.build()
});
let insert_records = insert_records.into_iter().map(|record| {
Change::builder()
.action(ChangeAction::Create) // <--
.resource_record_set(record.into())
.build()
});
let change_records: Vec<_> = remove_records.chain(insert_records).try_collect()?;
if !change_records.is_empty() {
let change_batch = ChangeBatch::builder()
.set_changes(Some(change_records))
.build()?;
aws_context
.route53()
.change_resource_record_sets()
.hosted_zone_id(transaction.zone_id)
.change_batch(change_batch)
.send()
.await?;
}
Ok(())
}
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