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use crate::backup_progress::BackupProgress;
use crate::backup_reason::Reason;
use crate::chunkid::ChunkId;
use crate::client::{BackupClient, ClientConfig, ClientError};
use crate::fsentry::FilesystemEntry;
use crate::fsiter::{FsIterError, FsIterResult};
use crate::generation::{LocalGeneration, LocalGenerationError};
use crate::policy::BackupPolicy;
use log::{info, warn};
use std::path::Path;
pub struct InitialBackup<'a> {
client: &'a BackupClient,
buffer_size: usize,
progress: BackupProgress,
}
pub struct IncrementalBackup<'a> {
client: &'a BackupClient,
policy: BackupPolicy,
buffer_size: usize,
progress: BackupProgress,
}
#[derive(Debug, thiserror::Error)]
pub enum BackupError {
#[error(transparent)]
ClientError(#[from] ClientError),
#[error(transparent)]
FsIterError(#[from] FsIterError),
#[error(transparent)]
LocalGenerationError(#[from] LocalGenerationError),
}
pub type BackupResult<T> = Result<T, BackupError>;
impl<'a> InitialBackup<'a> {
pub fn new(config: &ClientConfig, client: &'a BackupClient) -> BackupResult<Self> {
let progress = BackupProgress::initial();
Ok(Self {
client,
buffer_size: config.chunk_size,
progress,
})
}
pub fn progress(&self) -> &BackupProgress {
&self.progress
}
pub fn backup(
&self,
entry: FsIterResult<FilesystemEntry>,
) -> BackupResult<(FilesystemEntry, Vec<ChunkId>, Reason)> {
match entry {
Err(err) => Err(err.into()),
Ok(entry) => {
let path = &entry.pathbuf();
info!("backup: {}", path.display());
self.progress.found_live_file(path);
backup_file(&self.client, &entry, &path, self.buffer_size, Reason::IsNew)
}
}
}
}
impl<'a> IncrementalBackup<'a> {
pub fn new(config: &ClientConfig, client: &'a BackupClient) -> BackupResult<Self> {
let policy = BackupPolicy::new();
let progress = BackupProgress::incremental();
Ok(Self {
client,
policy,
buffer_size: config.chunk_size,
progress,
})
}
pub fn client(&self) -> &BackupClient {
self.client
}
pub fn progress(&self) -> &BackupProgress {
&self.progress
}
pub fn backup(
&self,
entry: FsIterResult<FilesystemEntry>,
old: &LocalGeneration,
) -> BackupResult<(FilesystemEntry, Vec<ChunkId>, Reason)> {
match entry {
Err(err) => {
warn!("backup: {}", err);
self.progress.found_problem();
Err(BackupError::FsIterError(err))
}
Ok(entry) => {
let path = &entry.pathbuf();
info!("backup: {}", path.display());
self.progress.found_live_file(path);
let reason = self.policy.needs_backup(&old, &entry);
match reason {
Reason::IsNew
| Reason::Changed
| Reason::GenerationLookupError
| Reason::Unknown => {
backup_file(&self.client, &entry, &path, self.buffer_size, reason)
}
Reason::Unchanged | Reason::Skipped | Reason::FileError => {
let fileno = old.get_fileno(&entry.pathbuf())?;
let ids = if let Some(fileno) = fileno {
old.chunkids(fileno)?
} else {
vec![]
};
Ok((entry.clone(), ids, reason))
}
}
}
}
}
}
fn backup_file(
client: &BackupClient,
entry: &FilesystemEntry,
path: &Path,
chunk_size: usize,
reason: Reason,
) -> BackupResult<(FilesystemEntry, Vec<ChunkId>, Reason)> {
let ids = client.upload_filesystem_entry(&entry, chunk_size);
match ids {
Err(err) => {
warn!("error backing up {}, skipping it: {}", path.display(), err);
Ok((entry.clone(), vec![], Reason::FileError))
}
Ok(ids) => Ok((entry.clone(), ids, reason)),
}
}
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