empty-trashes

#!/bin/zsh
# shellcheck shell=bash

# empty-trashes
# v0.9.17
# macOS
#
# Empty Trashes - part of Trash Tools
# Copyright (c) 2021 Joss Brown (pseud.)
# License: MIT / place of jurisdiction: Berlin, Germany / German laws apply
#
# keyboard shortcut: CMD-SHIFT-DEL | CMD-OPT-SHIFT-DEL (force)
#
# (force) empty all trashes: user trash, data volume trash & trashes on mounted volumes

force=false
if [[ $1 == "--force" ]] ; then
	force=true
	shift
fi

uiprocess="Empty Trashes"
account=$(id -u)

tempdir="$HOME/.cache/Finder"
configdir="$HOME/.config/TrashTools"
undoloc="/tmp/local.lcars.TrashTools.$account.trashes"
icloud="$HOME/Library/Mobile Documents/com~apple~CloudDocs"

fman="$configdir/file_manager.txt"
fman_name=$(head -1 < "$fman" 2>/dev/null)
! [[ $fman_name ]] && fman_name="Finder"

_beep () {
	osascript -e 'beep' -e 'delay 0.5' &>/dev/null
}

_notify () {
	osascript &>/dev/null << EOT
tell application "System Events"
	display notification "$2" with title "$uiprocess [" & "$account" & "]" subtitle "$1"
end tell
EOT
}

_all-trashes () {
	othertrashes=$(df | tail -n +2 | grep -v -e "/$" -e "/dev$" -e "/home$" -e "/System/Volumes/" | awk '{print substr($0, index($0,$9))}' | sed 's-$-/\.Trashes/'"$account"'-')
	echo -e "$HOME/.Trash\n$icloud/.Trash\n$othertrashes\n/System/Volumes/Data/.Trashes/$account"
}

_list-trashed () {
	alltrashed=""
	while read -r scanloc
	do
		if [[ $scanloc == "$HOME/.Trash" ]] ; then
			locinfo="Home"
		elif [[ $scanloc == "$icloud/.Trash" ]] ; then
			locinfo="iCloud"
		elif [[ $scanloc == "/System/Volumes/Data/Trashes/$account" ]] ; then
			locinfo="Data Volume Root"
		else
			locinfo=$(echo "$scanloc" | sed 's-/\.Trashes/'"$account"'$--')
			locinfo=$(basename "$locinfo")
		fi
		trashed=$(find "$scanloc" -mindepth 1 -maxdepth 1 2>/dev/null | sed "s-^$scanloc/--g" | sort -f | awk -v len=17 '{ if (length($0) > len) print substr($0, 1, len-3) "…" substr($0, length($0) - len, length($0)); else print; }')		
		if [[ $trashed ]] ; then
			trashed=$(echo "$trashed" | grep -v "^\.DS_Store$")
			! [[ $trashed ]] && trashed=".DS_Store"
			alltrashed="$alltrashed\n\n🗑 $locinfo\n$trashed"
		fi
	done < <(_all-trashes)
	alltrashed=$(echo -e "$alltrashed" | tail -n +3)
	lchoice=$(osascript 2>/dev/null << EOL
tell application "System Events"
	activate
	set theTrashIcon to POSIX file "/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/FullTrashIcon.icns"
	set theButton to button returned of (display dialog "$alltrashed" ¬
		buttons {"Cancel", "Continue & Empty Trashes"} ¬
		cancel button 1 ¬
		default button 2 ¬
		with title ¬
		"Empty Trashes - All Contents" ¬
		with icon theTrashIcon ¬
		giving up after 180)
end tell
EOL
	)
	if [[ $lchoice != "Continue & Empty Trashes" ]] ; then
		exit
	fi
}

_all-volumes () {
	othervols=$(df | tail -n +2 | grep -v -e "/$" -e "/dev$" -e "/home$" -e "/System/Volumes/" | awk '{print substr($0, index($0,$9))}')
	echo -e "$icloud\n$othervols\n/System/Volumes/Data"
}

_totalsize () {
	usersize=$(osascript -e 'set theTrashSize to size of (info for (path to trash folder))' 2>/dev/null)
	othersize=0
	vol_list=$(_all-volumes | grep -v "^$")
	if [[ $vol_list ]] ; then
		while read -r volume
		do
			if ! [[ -w "$volume" ]] ; then
				sizeadd=0
			else
				trashesloc="$volume/.Trash"
				if ! [[ -d "$trashesloc" ]] ; then
					trashesloc="$volume/.Trashes/$account"
				fi
				if [[ -d "$trashesloc" ]] ; then
					sizeadd=$(osascript 2>/dev/null << EOS
set theTrashPath to "$trashesloc"
try
	set theTrashAlias to (POSIX file theTrashPath) as alias
	tell application "System Events"
		set theTrashSize to size of theTrashAlias
	end tell
	return theTrashSize
on error
	return 0
end try
EOS
					)
					if ! [[ $sizeadd ]] || [[ $sizeadd == "false" ]] || [[ $sizeadd == "missing value" ]] ; then
						sizeadd=0
					fi
				else
					sizeadd=0
				fi
			fi
			othersize=$((othersize+sizeadd))
		done < <(echo "$vol_list")
	fi
	finalsize=$((usersize+othersize))
	echo -n "$finalsize"
}

_round () {
	echo $(printf %.$2f $(echo "scale=$2;(((10^$2)*$1)+0.5)/(10^$2)" | bc))
}


_bhr () {
	bytes="$1"
    mib_raw=$(bc -l <<< "scale=6; $bytes/1048576")
	mibytes=$(_round "$mib_raw" 2)
	[[ $mibytes == "0.00" ]] && mibytes="< 0.01"
	echo "$mibytes MiB ($bytes B)"
}

_rm-dsstore () {
	rm -f "$HOME/.Trash/.DS_Store" "$icloud/.Trash/.DS_Store" 2>/dev/null
	vol_list=$(_all-volumes | grep -v "^$")
	if [[ $vol_list ]] ; then
		while read -r volume
		do
			rm -f "$volume/.Trashes/$account/.DS_Store" 2>/dev/null
		done < <(echo "$vol_list")
	fi
}

rmblock=false
flaunch=false
trashfull=false
trashes_size1=$(_totalsize | sed 's/\.$//')
if [[ $trashes_size1 -gt 0 ]] ; then
	trashfull=true
	trashes_hrsize1=$(_bhr "$trashes_size1" 2>/dev/null)
	trashstring="currently occupy a total of:"
else
	emptydirs=""
	while read -r trashloc
	do
		trasheddirs=$(find "$trashloc" -mindepth 1 -maxdepth 1 -type d 2>/dev/null)
		[[ $trasheddirs ]] && emptydirs="$emptydirs\n$trasheddirs"
	done < <(_all-trashes)
	emptydirs=$(echo -e "$emptydirs" | grep -v "^$")
	if [[ $emptydirs ]] ; then
		trashfull=true
		trashstring="are currently occupied by:"
		emptydircount=$(echo "$emptydirs" | wc -l | xargs)
		if [[ $emptydircount -eq 1 ]] ; then
			trashes_hrsize1="$emptydircount empty folder"
		else
			trashes_hrsize1="$emptydircount empty folders"
		fi
	fi
fi

if $trashfull ; then
	if ! $force ; then
		frontmost=$(osascript -e 'tell application "System Events"' -e 'set theFrontmostApp to name of application processes whose frontmost is true' -e 'end tell' 2>/dev/null)
		! [[ $frontmost ]] && frontmost="$fman_name"
		choice=$(osascript 2>/dev/null << EOG
tell application "$frontmost"
	set theButton to button returned of (display alert ¬
		"Are you sure you want to empty all of your system's Trashes?" ¬
		buttons {"Cancel", "List Files", "Empty Trashes"} ¬
		as informational ¬
		message "Your Trashes (including the iCloud Trash) $trashstring" & return & return & "$trashes_hrsize1" ¬
		cancel button 1 ¬
		default button 3 ¬
		giving up after 180)
end tell
EOG
		)
		if ! [[ $choice ]] || [[ $choice == "false" ]] ; then
			exit
		fi
		[[ $choice == "List Files" ]] && _list-trashed
	fi
	if ! pgrep -x "Finder" &>/dev/null ; then
		open -j -g -b com.apple.finder && sleep 0.5
		flaunch=true
		touch "$tempdir/manual"
		rmblock=true
	else
		if ! [[ -e "$tempdir/manual" ]] ; then
			touch "$tempdir/manual"
			rmblock=true
		fi
	fi
	osascript -e 'tell application "Finder"' -e 'empty trash' -e 'end tell' -e 'delay 0.5' 2>/dev/null
	$flaunch && osascript -e 'tell application "Finder" to quit' 2>/dev/null
	$rmblock && rm -f "$tempdir/manual" 2>/dev/null
	trashfull=false
	emptydirs=""
	alltrashes=$(_all-trashes)
	while read -r trashloc
	do
		filesremain=false
		dirsremain=false
		if [[ $(find "$trashloc" -mindepth 1 -type f ! -name '.DS_Store' -print -quit 2>/dev/null) ]] ; then
			filesremain=true
		fi
		trasheddirs=$(find "$trashloc" -mindepth 1 -maxdepth 1 -type d 2>/dev/null)
		if [[ $trasheddirs ]] ; then
			emptydirs="$emptydirs\n$trasheddirs"
			dirsremain=true
		fi
		if ! $filesremain && ! $dirsremain ; then
			rm -f "$trashloc/.DS_Store" 2>/dev/null
		fi
	done < <(echo -e "$alltrashes")
	trashes_size2=$(_totalsize | sed 's/\.$//')
	trashes_hrsize2=$(_bhr "$trashes_size2" 2>/dev/null)
	if [[ $trashes_size2 -gt 0 ]] ; then
		trashfull=true
	else
		emptydirs=$(echo -e "$emptydirs" | grep -v "^$")
		if [[ $emptydirs ]] ; then
			trashfull=true
			trashstring="are currently occupied by:"
			emptydircount=$(echo "$emptydirs" | wc -l | xargs)
			if [[ $emptydircount -eq 1 ]] ; then
				trashes_hrsize2="$emptydircount empty folder"
			else
				trashes_hrsize2="$emptydircount empty folders"
			fi
		fi
	fi
	if $trashfull ; then
		_beep &
		_notify "⚠️ Trash not emptied" "$trashes_hrsize2 remaining"
	else
		rm -f "$undoloc" 2>/dev/null
		_rm-dsstore
	fi
else
	_notify "ℹ️ Trashes are empty"
	_rm-dsstore
	rm -f "$undoloc" 2>/dev/null
fi

exit