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use crate::fs::{path_to_folder, DataStore, DataStoreKey, Folder, FolderEntry, FolderEntryType};
use crate::logger::Logger;
use crossbeam::channel::{Receiver, Sender};
use std::ffi::OsStr;
use std::marker::PhantomData;
use std::path::PathBuf;
#[derive(Debug)]
pub struct EntryState {
size: u64,
}
type WalkDir = jwalk::WalkDirGeneric<((), Option<Result<EntryState, jwalk::Error>>)>;
pub type TraversalEntry =
Result<jwalk::DirEntry<((), Option<Result<EntryState, jwalk::Error>>)>, jwalk::Error>;
#[derive(Debug)]
pub enum TraversalEvent {
Entry(TraversalEntry),
Finished(u64),
}
#[derive(Debug)]
pub struct TaskManager<S: DataStore<DataStoreKey>> {
pub event_tx: Sender<TraversalEvent>,
pub event_rx: Receiver<TraversalEvent>,
pub is_working: bool,
_store: PhantomData<S>,
}
impl<S: DataStore<DataStoreKey>> TaskManager<S> {
pub fn new() -> Self {
let (entry_tx, entry_rx) = crossbeam::channel::bounded(100);
Self {
event_rx: entry_rx,
event_tx: entry_tx,
is_working: false,
_store: PhantomData,
}
}
pub fn is_done(&self) -> bool {
!self.is_working
}
pub fn start(&mut self, input: Vec<DataStoreKey>, logger: &mut Logger) {
logger.start_timer("Traversal");
self.is_working = true;
let entry_tx = self.event_tx.clone();
let _ = std::thread::Builder::new()
.name("dwipe-walk-dispatcher".to_string())
.spawn({
move || {
for root_path in input.into_iter() {
for entry in Self::iter_from_path(&root_path).into_iter() {
if entry_tx.send(TraversalEvent::Entry(entry)).is_err() {
println!("Send err: channel closed");
return;
}
}
}
let _ = entry_tx.send(TraversalEvent::Finished(0));
}
});
}
pub fn process_results(&mut self, store: &mut S, logger: &mut Logger) {
while let Ok(event) = self.event_rx.try_recv() {
match event {
TraversalEvent::Entry(entry) => match entry {
Ok(e) => {
// Construct entry
let belongs_to = e.parent_path.to_path_buf();
let title = e.file_name.to_string_lossy().to_string();
let extension = e
.path()
.extension()
.and_then(OsStr::to_str)
.unwrap_or("")
.to_string();
let kind = match e.file_type().is_dir() {
true => {
// Create store record for folder (edge-case for last-leaf-empty
// folders)
let default_folder = Folder::new(title.clone());
store.set_folder(&e.path().clone(), default_folder);
FolderEntryType::Folder
}
false => FolderEntryType::File,
};
let size = match e.client_state.as_ref() {
Some(Ok(my_entry)) => {
if kind == FolderEntryType::Folder {
// Ignore folder metadata size
0
} else {
my_entry.size
}
}
_ => 0,
};
let folder_entry = FolderEntry {
title: title.clone(),
size: Some(size),
is_loaded: true,
kind,
};
// Add entry to parent folder
let parent_folder = store.get_folder_mut(&belongs_to.to_path_buf());
match parent_folder {
Some(folder) => {
if !extension.is_empty() {
folder.append_file_type_size(&extension, size);
}
folder.entries.push(folder_entry);
}
None => {
if let Some(belongs_to_name) = belongs_to.file_name() {
let mut folder =
Folder::new(belongs_to_name.to_string_lossy().to_string());
folder.entries.push(folder_entry);
store.set_folder(&belongs_to.to_path_buf(), folder);
}
}
};
// Traverse tree up - update parent folder sizes
if let Some(title_traverse_os) = belongs_to.file_name() {
let mut title_traverse =
title_traverse_os.to_string_lossy().to_string();
let mut path_traverse = belongs_to.to_path_buf();
while let Some(parent_buf) = path_traverse.parent() {
if parent_buf == path_traverse {
break;
}
if let Some(parent_folder) =
store.get_folder_mut(&PathBuf::from(parent_buf))
{
// Increment parent's entry size
for child in parent_folder.entries.iter_mut() {
if child.title == title_traverse
&& child.kind == FolderEntryType::Folder
{
child.increment_size(size);
parent_folder.sorted_by = None;
break;
}
}
// Update parent's folder file_type_map
if !extension.is_empty() {
parent_folder.append_file_type_size(&extension, size);
}
title_traverse.clone_from(&parent_folder.title);
path_traverse = parent_buf.to_path_buf();
} else {
break;
}
}
}
}
Err(_) => {
logger.log("Done".into());
}
},
TraversalEvent::Finished(_) => {
self.is_working = false;
logger.stop_timer("Traversal");
}
}
}
}
pub fn process_path_sync(&self, store: &mut S, path: &DataStoreKey) -> Vec<DataStoreKey> {
let mut folder_new = path_to_folder(path.clone());
let mut paths_to_process: Vec<DataStoreKey> = vec![];
let mut entries_to_keep: Vec<FolderEntry> = vec![];
match store.get_folder_mut(path) {
Some(folder_stored) => {
// Folder already exists
for child in folder_new.entries.iter_mut() {
if !folder_stored.entries.iter().any(|e| e.title == child.title) {
// No entry
if child.kind == FolderEntryType::Folder {
// Folder -> process
let mut child_path = path.clone();
child_path.push(child.title.clone());
paths_to_process.push(child_path);
} else {
// File -> simply push
folder_stored.entries.push(child.clone());
}
}
}
}
None => {
// Folder does not exist
for child in folder_new.entries.iter_mut() {
if child.kind == FolderEntryType::Folder {
// Folder -> process
let mut child_path = path.clone();
child_path.push(child.title.clone());
paths_to_process.push(child_path);
} else {
// File -> simply push
entries_to_keep.push(child.clone());
}
}
folder_new.entries = entries_to_keep;
store.set_folder(path, folder_new.clone());
}
}
paths_to_process
}
pub fn iter_from_path(root_path: &PathBuf) -> WalkDir {
let threads = num_cpus::get();
let ignore_dirs = [];
WalkDir::new(root_path)
.follow_links(false)
.skip_hidden(false)
.process_read_dir({
move |_, _, _, dir_entry_results| {
dir_entry_results.iter_mut().for_each(|dir_entry_result| {
if let Ok(dir_entry) = dir_entry_result {
let metadata = dir_entry.metadata();
if let Ok(metadata) = metadata {
dir_entry.client_state = Some(Ok(EntryState {
size: metadata.len(),
}));
} else {
dir_entry.client_state = Some(Err(metadata.unwrap_err()));
}
if ignore_dirs.contains(&dir_entry.path()) {
dir_entry.read_children_path = None;
}
}
})
}
})
.parallelism(match threads {
0 => jwalk::Parallelism::RayonDefaultPool {
busy_timeout: std::time::Duration::from_secs(1),
},
1 => jwalk::Parallelism::Serial,
_ => jwalk::Parallelism::RayonExistingPool {
pool: jwalk::rayon::ThreadPoolBuilder::new()
.stack_size(128 * 1024)
.num_threads(threads)
.thread_name(|idx| format!("dwipe-walk-{idx}"))
.build()
.expect("fields we set cannot fail")
.into(),
busy_timeout: None,
},
})
}
}
impl<S: DataStore<DataStoreKey>> Default for TaskManager<S> {
fn default() -> Self {
Self::new()
}
}