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use async_trait::async_trait;
use serde::{Deserialize, Serialize};
use crate::error::Error;
use crate::table::*;
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub struct Bucket {
// Primary key
pub name: String,
// Timestamp and deletion
// Upon version increment, all info is replaced
pub timestamp: u64,
pub deleted: bool,
// Authorized keys
authorized_keys: Vec<AllowedKey>,
}
impl Bucket {
pub fn new(
name: String,
timestamp: u64,
deleted: bool,
authorized_keys: Vec<AllowedKey>,
) -> Self {
let mut ret = Bucket {
name,
timestamp,
deleted,
authorized_keys: vec![],
};
for key in authorized_keys {
ret.add_key(key)
.expect("Duplicate AllowedKey in Bucket constructor");
}
ret
}
/// Add a key only if it is not already present
pub fn add_key(&mut self, key: AllowedKey) -> Result<(), ()> {
match self
.authorized_keys
.binary_search_by(|k| k.access_key_id.cmp(&key.access_key_id))
{
Err(i) => {
self.authorized_keys.insert(i, key);
Ok(())
}
Ok(_) => Err(()),
}
}
pub fn authorized_keys(&self) -> &[AllowedKey] {
&self.authorized_keys[..]
}
}
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub struct AllowedKey {
pub access_key_id: String,
pub timestamp: u64,
pub allowed_read: bool,
pub allowed_write: bool,
}
impl Entry<EmptyKey, String> for Bucket {
fn partition_key(&self) -> &EmptyKey {
&EmptyKey
}
fn sort_key(&self) -> &String {
&self.name
}
fn merge(&mut self, other: &Self) {
if other.timestamp < self.timestamp {
*self = other.clone();
return;
}
if self.timestamp > other.timestamp || self.deleted {
return;
}
for ak in other.authorized_keys.iter() {
match self
.authorized_keys
.binary_search_by(|our_ak| our_ak.access_key_id.cmp(&ak.access_key_id))
{
Ok(i) => {
let our_ak = &mut self.authorized_keys[i];
if ak.timestamp > our_ak.timestamp {
*our_ak = ak.clone();
}
}
Err(i) => {
self.authorized_keys.insert(i, ak.clone());
}
}
}
}
}
pub struct BucketTable;
#[async_trait]
impl TableSchema for BucketTable {
type P = EmptyKey;
type S = String;
type E = Bucket;
type Filter = ();
async fn updated(&self, _old: Option<Self::E>, _new: Option<Self::E>) -> Result<(), Error> {
Ok(())
}
fn matches_filter(entry: &Self::E, _filter: &Self::Filter) -> bool {
!entry.deleted
}
}
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