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|
// do a sync :O
use std::cmp::Ordering;
use eyre::Result;
use thiserror::Error;
use super::store::Store;
use crate::{api_client::Client, settings::Settings};
use atuin_common::record::{Diff, HostId, RecordId, RecordIdx, RecordStatus};
#[derive(Error, Debug)]
pub enum SyncError {
#[error("the local store is ahead of the remote, but for another host. has remote lost data?")]
LocalAheadOtherHost,
#[error("an issue with the local database occured")]
LocalStoreError,
#[error("something has gone wrong with the sync logic: {msg:?}")]
SyncLogicError { msg: String },
#[error("a request to the sync server failed")]
RemoteRequestError,
}
#[derive(Debug, Eq, PartialEq)]
pub enum Operation {
// Either upload or download until the states matches the below
Upload {
local: RecordIdx,
remote: Option<RecordIdx>,
host: HostId,
tag: String,
},
Download {
local: Option<RecordIdx>,
remote: RecordIdx,
host: HostId,
tag: String,
},
Noop {
host: HostId,
tag: String,
},
}
pub async fn diff(settings: &Settings, store: &impl Store) -> Result<(Vec<Diff>, RecordStatus)> {
let client = Client::new(
&settings.sync_address,
&settings.session_token,
settings.network_connect_timeout,
settings.network_timeout,
)?;
let local_index = store.status().await?;
let remote_index = client.record_status().await?;
let diff = local_index.diff(&remote_index);
Ok((diff, remote_index))
}
// Take a diff, along with a local store, and resolve it into a set of operations.
// With the store as context, we can determine if a tail exists locally or not and therefore if it needs uploading or download.
// In theory this could be done as a part of the diffing stage, but it's easier to reason
// about and test this way
pub async fn operations(
diffs: Vec<Diff>,
_store: &impl Store,
) -> Result<Vec<Operation>, SyncError> {
let mut operations = Vec::with_capacity(diffs.len());
for diff in diffs {
let op = match (diff.local, diff.remote) {
// We both have it! Could be either. Compare.
(Some(local), Some(remote)) => match local.cmp(&remote) {
Ordering::Equal => Operation::Noop {
host: diff.host,
tag: diff.tag,
},
Ordering::Greater => Operation::Upload {
local,
remote: Some(remote),
host: diff.host,
tag: diff.tag,
},
Ordering::Less => Operation::Download {
local: Some(local),
remote,
host: diff.host,
tag: diff.tag,
},
},
// Remote has it, we don't. Gotta be download
(None, Some(remote)) => Operation::Download {
local: None,
remote,
host: diff.host,
tag: diff.tag,
},
// We have it, remote doesn't. Gotta be upload.
(Some(local), None) => Operation::Upload {
local,
remote: None,
host: diff.host,
tag: diff.tag,
},
// something is pretty fucked.
(None, None) => {
return Err(SyncError::SyncLogicError {
msg: String::from(
"diff has nothing for local or remote - (host, tag) does not exist",
),
})
}
};
operations.push(op);
}
// sort them - purely so we have a stable testing order, and can rely on
// same input = same output
// We can sort by ID so long as we continue to use UUIDv7 or something
// with the same properties
operations.sort_by_key(|op| match op {
Operation::Noop { host, tag } => (0, *host, tag.clone()),
Operation::Upload { host, tag, .. } => (1, *host, tag.clone()),
Operation::Download { host, tag, .. } => (2, *host, tag.clone()),
});
Ok(operations)
}
async fn sync_upload(
store: &impl Store,
client: &Client<'_>,
host: HostId,
tag: String,
local: RecordIdx,
remote: Option<RecordIdx>,
) -> Result<i64, SyncError> {
let remote = remote.unwrap_or(0);
let expected = local - remote;
let upload_page_size = 100;
let mut progress = 0;
println!(
"Uploading {} records to {}/{}",
expected,
host.0.as_simple(),
tag
);
// preload with the first entry if remote does not know of this store
loop {
let page = store
.next(host, tag.as_str(), remote + progress, upload_page_size)
.await
.map_err(|e| {
error!("failed to read upload page: {e:?}");
SyncError::LocalStoreError
})?;
client.post_records(&page).await.map_err(|e| {
error!("failed to post records: {e:?}");
SyncError::RemoteRequestError
})?;
println!(
"uploaded {} to remote, progress {}/{}",
page.len(),
progress,
expected
);
progress += page.len() as u64;
if progress >= expected {
break;
}
}
Ok(progress as i64)
}
async fn sync_download(
store: &impl Store,
client: &Client<'_>,
host: HostId,
tag: String,
local: Option<RecordIdx>,
remote: RecordIdx,
) -> Result<Vec<RecordId>, SyncError> {
let local = local.unwrap_or(0);
let expected = remote - local;
let download_page_size = 100;
let mut progress = 0;
let mut ret = Vec::new();
println!(
"Downloading {} records from {}/{}"
|