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