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use serde::{Deserialize, Serialize};
use garage_util::data::*;
use garage_table::crdt::*;
use garage_table::*;
/// The bucket alias table holds the names given to buckets
/// in the global namespace.
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub struct BucketAlias {
name: String,
pub state: crdt::Lww<crdt::Deletable<AliasParams>>,
}
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Debug, Serialize, Deserialize)]
pub struct AliasParams {
pub bucket_id: Uuid,
}
impl AutoCrdt for AliasParams {
const WARN_IF_DIFFERENT: bool = true;
}
impl BucketAlias {
pub fn new(name: String, ts: u64, bucket_id: Uuid) -> Option<Self> {
if !is_valid_bucket_name(&name) {
None
} else {
Some(BucketAlias {
name,
state: crdt::Lww::raw(ts, crdt::Deletable::present(AliasParams { bucket_id })),
})
}
}
pub fn is_deleted(&self) -> bool {
self.state.get().is_deleted()
}
pub fn name(&self) -> &str {
&self.name
}
}
impl Crdt for BucketAlias {
fn merge(&mut self, o: &Self) {
self.state.merge(&o.state);
}
}
impl Entry<EmptyKey, String> for BucketAlias {
fn partition_key(&self) -> &EmptyKey {
&EmptyKey
}
fn sort_key(&self) -> &String {
&self.name
}
}
pub struct BucketAliasTable;
impl TableSchema for BucketAliasTable {
const TABLE_NAME: &'static str = "bucket_alias";
type P = EmptyKey;
type S = String;
type E = BucketAlias;
type Filter = DeletedFilter;
fn matches_filter(entry: &Self::E, filter: &Self::Filter) -> bool {
filter.apply(entry.is_deleted())
}
}
/// Check if a bucket name is valid.
///
/// The requirements are listed here:
///
/// <https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html>
///
/// In the case of Garage, bucket names must not be hex-encoded
/// 32 byte string, which is excluded thanks to the
/// maximum length of 63 bytes given in the spec.
pub fn is_valid_bucket_name(n: &str) -> bool {
// Bucket names must be between 3 and 63 characters
n.len() >= 3 && n.len() <= 63
// Bucket names must be composed of lowercase letters, numbers,
// dashes and dots
&& n.chars().all(|c| matches!(c, '.' | '-' | 'a'..='z' | '0'..='9'))
// Bucket names must start and end with a letter or a number
&& !n.starts_with(&['-', '.'][..])
&& !n.ends_with(&['-', '.'][..])
// Bucket names must not be formated as an IP address
&& n.parse::<std::net::IpAddr>().is_err()
// Bucket names must not start wih "xn--"
&& !n.starts_with("xn--")
// Bucket names must not end with "-s3alias"
&& !n.ends_with("-s3alias")
}
/// Error message to return for invalid bucket names
pub const INVALID_BUCKET_NAME_MESSAGE: &str = "Invalid bucket name. See AWS documentation for constraints on S3 bucket names:\nhttps://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html";
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