use std ::collections ::BTreeMap ;
use std ::fs ;
use std ::fs ::File ;
use std ::io ::{ BufWriter , Write } ;
use std ::path ::PathBuf ;
use crossbeam_channel ::Receiver ;
use futures ::channel ::mpsc ::UnboundedSender ;
use log ::{ debug , info } ;
use crate ::common_dir_traversal ::{ Collect , DirTraversalBuilder , DirTraversalResult , FolderEmptiness , FolderEntry , ProgressData , ToolType } ;
use crate ::common_tool ::{ CommonData , CommonToolData } ;
use crate ::common_traits ::{ DebugPrint , PrintResults , SaveResults } ;
/// Struct to store most basics info about all folder
pub struct EmptyFolder {
common_data : CommonToolData ,
information : Info ,
delete_folders : bool ,
empty_folder_list : BTreeMap < PathBuf , FolderEntry > , // Path, FolderEntry
}
/// Info struck with helpful information's about results
#[ derive(Default) ]
pub struct Info {
pub number_of_empty_folders : usize ,
}
/// Method implementation for `EmptyFolder`
impl EmptyFolder {
/// New function providing basics values
pub fn new ( ) -> Self {
Self {
common_data : CommonToolData ::new ( ToolType ::EmptyFolders ) ,
information : Default ::default ( ) ,
delete_folders : false ,
empty_folder_list : Default ::default ( ) ,
}
}
pub const fn get_empty_folder_list ( & self ) -> & BTreeMap < PathBuf , FolderEntry > {
& self . empty_folder_list
}
pub const fn get_information ( & self ) -> & Info {
& self . information
}
pub fn find_empty_folders ( & mut self , stop_receiver : Option < & Receiver < ( ) > > , progress_sender : Option < & UnboundedSender < ProgressData > > ) {
info ! ( "Starting finding empty folders" ) ;
let start_time = std ::time ::Instant ::now ( ) ;
self . find_empty_folders_internal ( stop_receiver , progress_sender ) ;
info ! ( "Ended finding empty folders which took {:?}" , start_time . elapsed ( ) ) ;
}
fn find_empty_folders_internal ( & mut self , stop_receiver : Option < & Receiver < ( ) > > , progress_sender : Option < & UnboundedSender < ProgressData > > ) {
self . optimize_dirs_before_start ( ) ;
if ! self . check_for_empty_folders ( stop_receiver , progress_sender ) {
self . common_data . stopped_search = true ;
return ;
}
self . optimize_folders ( ) ;
if self . delete_folders {
self . delete_empty_folders ( ) ;
}
self . debug_print ( ) ;
}
pub fn set_delete_folder ( & mut self , delete_folder : bool ) {
self . delete_folders = delete_folder ;
}
/// Clean directory tree
/// If directory contains only 2 empty folders, then this directory should be removed instead two empty folders inside because it will produce another empty folder.
fn optimize_folders ( & mut self ) {
let mut new_directory_folders : BTreeMap < PathBuf , FolderEntry > = Default ::default ( ) ;
for ( name , folder_entry ) in & self . empty_folder_list {
match & folder_entry . parent_path {
Some ( t ) = > {
if ! self . empty_folder_list . contains_key ( t ) {
new_directory_folders . insert ( name . clone ( ) , folder_entry . clone ( ) ) ;
}
}
None = > {
new_directory_folders . insert ( name . clone ( ) , folder_entry . clone ( ) ) ;
}
}
}
self . empty_folder_list = new_directory_folders ;
self . information . number_of_empty_folders = self . empty_folder_list . len ( ) ;
}
/// Function to check if folder are empty.
/// Parameter `initial_checking` for second check before deleting to be sure that checked folder is still empty
fn check_for_empty_folders ( & mut self , stop_receiver : Option < & Receiver < ( ) > > , progress_sender : Option < & UnboundedSender < ProgressData > > ) -> bool {
debug ! ( "check_for_empty_folders - start" ) ;
let result = DirTraversalBuilder ::new ( )
. root_dirs ( self . common_data . directories . included_directories . clone ( ) )
. group_by ( | _fe | ( ) )
. stop_receiver ( stop_receiver )
. progress_sender ( progress_sender )
. directories ( self . common_data . directories . clone ( ) )
. excluded_items ( self . common_data . excluded_items . clone ( ) )
. collect ( Collect ::EmptyFolders )
. max_stage ( 0 )
. build ( )
. run ( ) ;
debug ! ( "check_for_empty_folders - collected folders to check" ) ;
let res = match result {
DirTraversalResult ::SuccessFiles { .. } = > {
unreachable! ( )
}
DirTraversalResult ::SuccessFolders { folder_entries , warnings } = > {
// We need to set empty folder list
#[ allow(unused_mut) ] // Used is later by Windows build
for ( mut name , folder_entry ) in folder_entries {
if folder_entry . is_empty ! = FolderEmptiness ::No {
self . empty_folder_list . insert ( name , folder_entry ) ;
}
}
self . common_data . text_messages . warnings . extend ( warnings ) ;
true
}
DirTraversalResult ::Stopped = > false ,
} ;
debug ! ( "check_for_empty_folders - end" ) ;
res
}
/// Deletes earlier found empty folders
fn delete_empty_folders ( & mut self ) {
// Folders may be deleted or require too big privileges
for name in self . empty_folder_list . keys ( ) {
match fs ::remove_dir_all ( name ) {
Ok ( ( ) ) = > ( ) ,
Err ( e ) = > self
. common_data
. text_messages
. warnings
. push ( format! ( "Failed to remove folder {}, reason {}" , name . display ( ) , e ) ) ,
} ;
}
}
}
impl Default for EmptyFolder {
fn default ( ) -> Self {
Self ::new ( )
}
}
impl DebugPrint for EmptyFolder {
#[ allow(dead_code) ]
#[ allow(unreachable_code) ]
fn debug_print ( & self ) {
#[ cfg(not(debug_assertions)) ]
{
return ;
}
println! ( "---------------DEBUG PRINT---------------" ) ;
println! ( "Number of empty folders - {}" , self . information . number_of_empty_folders ) ;
self . debug_print_common ( ) ;
println! ( "-----------------------------------------" ) ;
}
}
impl SaveResults for EmptyFolder {
fn save_results_to_file ( & mut self , file_name : & str ) -> bool {
let file_name : String = match file_name {
"" = > "results.txt" . to_string ( ) ,
k = > k . to_string ( ) ,
} ;
let file_handler = match File ::create ( & file_name ) {
Ok ( t ) = > t ,
Err ( e ) = > {
self . common_data . text_messages . errors . push ( format! ( "Failed to create file {file_name}, reason {e}" ) ) ;
return false ;
}
} ;
let mut writer = BufWriter ::new ( file_handler ) ;
if let Err ( e ) = writeln! (
writer ,
"Results of searching {:?} with excluded directories {:?}" ,
self . common_data . directories . included_directories , self . common_data . directories . excluded_directories
) {
self . common_data
. text_messages
. errors
. push ( format! ( "Failed to save results to file {file_name}, reason {e}" ) ) ;
return false ;
}
if ! self . empty_folder_list . is_empty ( ) {
writeln! (
writer ,
"-------------------------------------------------Empty folder list-------------------------------------------------"
)
. unwrap ( ) ;
writeln! ( writer , "Found {} empty folders" , self . information . number_of_empty_folders ) . unwrap ( ) ;
for name in self . empty_folder_list . keys ( ) {
writeln! ( writer , "{}" , name . display ( ) ) . unwrap ( ) ;
}
} else {
write! ( writer , "Not found any empty folders." ) . unwrap ( ) ;
}
true
}
}
impl PrintResults for EmptyFolder {
fn print_results ( & self ) {
if ! self . empty_folder_list . is_empty ( ) {
println! ( "Found {} empty folders" , self . empty_folder_list . len ( ) ) ;
}
for name in self . empty_folder_list . keys ( ) {
println! ( "{}" , name . display ( ) ) ;
}
}
}
impl CommonData for EmptyFolder {
fn get_cd ( & self ) -> & CommonToolData {
& self . common_data
}
fn get_cd_mut ( & mut self ) -> & mut CommonToolData {
& mut self . common_data
}
}