#
# Common variables & functions
#

# Package dependencies
PKG_DEPENDENCIES="python3 python3-venv python3-pip"

# Check if directory/file already exists (path in argument)
myynh_check_path () {
	[ -z "$1" ] && ynh_die "No argument supplied"
	[ ! -e "$1" ] || ynh_die "$1 already exists"
}

# Create directory only if not already exists (path in argument)
myynh_create_dir () {
	[ -z "$1" ] && ynh_die "No argument supplied"
	[ -d "$1" ] || mkdir -p "$1"
}

# Check if enough disk space available on backup storage
myynh_check_disk_space () {
	file_to_analyse=$1
	backup_size=$(du --summarize "$1" | cut -f1)
	free_space=$(df --output=avail "/home/yunohost.backup" | sed 1d)
	if [ $free_space -le $backup_size ]; then
		WARNING echo "Not enough backup disk space for: $1"
		WARNING echo "Space available: $(HUMAN_SIZE $free_space)"
		ynh_die "Space needed: $(HUMAN_SIZE $backup_size)"
	fi
}

# Clean & copy files needed to final folder
myynh_clean_source () {
	find "$TMPDIR" -type f -name ".htaccess" | xargs rm
	[ -e "$TMPDIR/.gitignore" ] && rm -r "$TMPDIR/.gitignore"
}

#=================================================
# FUTURE YUNOHOST HELPERS - TO BE REMOVED LATER
#=================================================

# Delete a file checksum from the app settings
#
# $app should be defined when calling this helper
#
# usage: ynh_remove_file_checksum file
# | arg: file - The file for which the checksum will be deleted
ynh_delete_file_checksum () {
	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
	ynh_app_setting_delete $app $checksum_setting_name
}

# Execute a command as another user
# usage: exec_as USER COMMAND [ARG ...]
exec_as() {
	local USER=$1
	shift 1
	
	if [[ $USER = $(whoami) ]]; then
		eval "$@"
	else
		sudo -u "$USER" "$@"
	fi
}