#! /bin/bash
# vim: set tabstop=4 shiftwidth=4 noexpandtab filetype=sh:

# install_comm_tools - temporary script for comm tools from ivan.sh
#
# To the extent possible under law, T. Joseph Carter and Ivan Drucker have
# waived all copyright and related or neighboring rights to the a2cloud
# scripts themselves.  Software used or installed by these scripts is subject
# to other licenses.  This work is published from the United States.

# Find the path of our source directory
a2cSource="$( dirname "${BASH_SOURCE[0]}" )/.."
pushd $a2cSource >/dev/null
a2cSource="$PWD"
popd >/dev/null
if [[ ! -f "$a2cSource/.a2cloud_source" ]]; then
	printf "\na2cloud: cannot find a2cloud source directory in $a2cSource.\n\n"
	exit 1
fi

# Make sure ras2_{os,arch} get set
. "$a2cSource/scripts/system_ident" -q

install_curl() {
	if ! hash curl 2> /dev/null; then
		### CommTools: Install curl
		echo "A2CLOUD: Installing curl..."
		sudo apt-get -y install curl
		sudo apt-get -y clean
	else
		echo "A2CLOUD: curl is already installed."
	fi
}

install_lrzsz() {
	if ! hash sz 2> /dev/null; then
		### CommTools: Install lrzsz
		echo "A2CLOUD: Installing rzsz for X/Y/Zmodem transfers..."
		sudo apt-get -y install lrzsz
		sudo apt-get -y clean
	else
		echo "A2CLOUD: rzsz is already installed."
	fi
}

install_ftp() {
	if ! hash ftp 2> /dev/null; then
		### CommTools: Install ftp
		echo "A2CLOUD: Installing ftp..."
		sudo apt-get -y install ftp
		sudo apt-get -y clean
	else
		echo "A2CLOUD: ftp is already installed."
	fi
}

install_lftp() {
	if ! hash lftp 2> /dev/null; then
		echo "a2cloud: Installing lftp..."
		sudo apt-get -y install lftp
		sudo apt-get -y clean
	else
		echo "a2cloud: lftp is already installed."
	fi
}

install_mc() {
	if ! hash mc 2> /dev/null; then
		echo "a2cloud: Installing mc..."
		sudo apt-get -y install mc
		sudo apt-get -y clean
	else
		echo "a2cloud: mc is already installed."
	fi
}

install_lynx() {
	if ! hash lynx 2> /dev/null; then
		### CommTools: Install lynx
		echo "A2CLOUD: Installing lynx..."
		sudo apt-get -y install lynx
		sudo apt-get -y clean
	else
		echo "A2CLOUD: lynx is already installed."
	fi
}

install_links() {
	if ! hash links 2> /dev/null; then
		### CommTools: Install links
		echo "A2CLOUD: Installing links..."
		sudo apt-get -y --force-yes install links
		sudo apt-get -y clean
	else
		echo "A2CLOUD: links is already installed."
	fi
}

install_a2news() {
	### CommTools: Install tin + a2news script
	sudo install -o root -g root -m 755 "$a2cSource/setup/a2news" /usr/local/bin/a2news
	if ! hash tin 2> /dev/null; then
		echo "A2CLOUD: Installing tin..."
		sudo apt-get -y install tin
		sudo apt-get -y clean
	else
		echo "A2CLOUD: tin is already installed."
	fi

	# Leaving this here just in case, but it should not be necessary anymore.

#	### CommTools: Configure exim4 to use ipv4 to kill console errors
#	# have exim4 use IPv4 only to prevent log errors (IPv6 is off by default in Raspbian)
#	if [[ $(grep ' ; ::1' /etc/exim4/update-exim4.conf.conf) ]]; then
#		echo "A2CLOUD: Setting exim4 to use only IPv4 to prevent startup error messages..."
#		sudo sed -i 's/ ; ::1//' /etc/exim4/update-exim4.conf.conf
#		sudo update-exim4.conf
#		sudo rm /var/log/exim4/mainlog /var/log/exim4/paniclog &> /dev/null
#	fi

	# restore exim4 log directory if occupied by a file put there by earlier A2CLOUD versions
	if [[ -f /var/log/exim4 ]]; then
		echo "A2CLOUD: Restoring exim4 log directory..."
		sudo rm /var/log/exim4
		sudo mkdir /var/log/exim4
		sudo chown Debian-exim:adm /var/log/exim4
		sudo chmod 2750 /var/log/exim4
	fi
}

install_a2chat() {
	### CommTools: Install irssi + a2chat script
	sudo install -o root -g root -m 755 "$a2cSource/setup/a2chat" /usr/local/bin/a2chat
	if ! hash irssi 2> /dev/null; then
		echo "A2CLOUD: Installing a2chat/irssi..."
		sudo apt-get -y install irssi
		sudo apt-get -y clean
	else
		echo "A2CLOUD: a2chat/irssi is already installed."
	fi
}

install_telnet() {
	### CommTools: Install telnet
	if ! hash telnet 2> /dev/null; then
		echo "A2CLOUD: Installing telnet..."
		sudo apt-get -y install telnet
		sudo apt-get -y clean
	else
		echo "A2CLOUD: telnet is already installed."
	fi
}

install_oysttyer() {
	rm_file() {
		if [[ -f $1 ]]; then
			echo "Removing $1"
			sudo rm -f "$1"
		fi
	}

	try_rmdir() {
		if [[ -d $1 ]]; then
			if sudo rmdir $1 &>/dev/null; then
				echo "Removing directory $1"
			else
				echo "Cannot remove $1"
			fi
		fi
	}
	### CommTools: Install Oysttyer (formerly TTYtter)

	# Do we need to check for the readline module here as well?
	local perlVersion=$(perl -e 'print $^V' | cut -c 2-)

	local oysttyerWork="$(mktemp -d /tmp/oysttyer.XXXXXXXXXXXX)"
	pushd "$oysttyerWork" >/dev/null

	# Remove old ttytter
	# Previous versions of a2cloud symlinked ttytter to oysttyer.  I don't think
	# we want to do that, because Debian won't in buster when we start using
	# their oysttyer package.
	if [[ -f /usr/local/bin/ttytter || -f /usr/local/share/perl/${perlVersion}/Term/ReadLine/TTYtter.pm ]]; then
		echo "Removing ttytter in favor of oysttyer..."
		sudo rm -f /usr/local/bin/ttytter
	fi

	# Now install the Debian's package
	echo "Installing Debian's Term::ReadKey (libterm-readline-gnu-perl)..."
	sudo apt-get -y install libterm-readline-gnu-perl

	# Remove locally installed Term::ReadKey (libterm-readline-gnu-perl
	if [[ -f /usr/local/man/man3/Term::ReadKey.3pm ]]; then
		cat <<-EOF
		You have a locally installed Term::ReadKey from an older version of a2cloud.

		We will try to remove it, but locally installed perl modules are rather
		difficult to completely remove.  What we cannot remove will not interfere
		with a running system, but if you like a tidy system, you'll need to clean
		up a few perl files yourself.

		EOF
		rm_file "/usr/local/man/man3/Term::ReadKey.3pm"

		# Deleting perl modules properly is hard, next to impossible, and this
		# could be in man places.  We'll do what we can.
		for ver in 5.14.2 5.20.2 $perlVersion; do
			for perlDir in perl arm-linux-gnueabihf/perl i686-linux-gnu/perl x86_64-linux-gnu/perl; do
				if [[ -f /usr/local/lib/$perlDir/$ver/Term/ReadKey.pm ]]; then
					rm_file "/usr/local/lib/$perlDir/$ver/Term/ReadKey.pm"
					try_rmdir "/usr/local/lib/$perlDir/$ver/Term"
					rm_file "/usr/local/lib/$perlDir/$ver/auto/Term/ReadKey/autosplit.ix"
					rm_file "/usr/local/lib/$perlDir/$ver/auto/Term/ReadKey/ReadKey.so"
					try_rmdir "/usr/local/lib/$perlDir/$ver/auto/Term/ReadKey"
					try_rmdir "/usr/local/lib/$perlDir/$ver/auto/Term"
					echo "Additional cleaning may be needed under:"
					echo "  /usr/local/lib/$perlDir/$ver"
				fi
			done
		done
	fi

	# Old TTYtter author still maintains the readline module for oysttyer
	echo "Installing Term::ReadLine::TTYtter..."
	if sudo apt-get -y install libterm-readline-ttytter-perl; then
		# We have a package now, so remove any locally installed version
		if [[ -f /usr/local/share/perl/$perlVersion/Term/ReadLine/TTYtter.pm ]]; then
			echo "Removing local Term::ReadLine::TTYtter in favor of the package we installed."
			sudo rm -f "/usr/local/share/perl/$perlVersion/Term/ReadLine/readline_ttytter.pm"
			sudo rm -f "/usr/local/share/perl/$perlVersion/Term/ReadLine/TTYtter.pm"
		fi
	else
		# We haven't got a package, install it locally
		echo "No package. That's all right, we'll install it locally..."

		# We don't need to make anything for this, just copy the files
		wget -O Term-ReadLine-TTYtter-1.4.tar.gz http://search.cpan.org/CPAN/authors/id/C/CK/CKAISER/Term-ReadLine-TTYtter-1.4.tar.gz
		tar zxf Term-ReadLine-TTYtter-1.4.tar.gz
		cd Term-ReadLine-TTYtter-1.4
		sudo install -m 755 -o root -g root -d /usr/local/share/perl/$perlVersion/Term/ReadLine
		sudo install -m 644 -o root -g root ReadLine/readline_ttytter.pm ReadLine/TTYtter.pm /usr/local/share/perl/$perlVersion/Term/ReadLine
		cd ..
	fi

	# Actually install oysttyer now, if needed
	echo "Installing oysttyer..."
	if sudo apt-get -y install oysttyer; then
		if [[ -f /usr/local/bin/oysttyer ]]; then
			echo "Removing local oysttyer in favor of the package we installed."
			sudo rm -f /usr/local/bin/oysttyer
		fi
	else
		echo "No package. That's all right, we'll install it locally..."
		wget -O oysttyer-2.9.1.tar.gz https://github.com/oysttyer/oysttyer/archive/2.9.1.tar.gz
		tar -zxf oysttyer-2.9.1.tar.gz
		sudo install -m 755 -o root -g root oysttyer-2.9.1/oysttyer.pl /usr/local/bin/oysttyer
	fi

	sudo apt-get clean

	popd >/dev/null
	rm -rf "$oysttyerWork"
}

install_curl
install_lrzsz
install_ftp
install_lftp
install_mc
install_lynx
install_links
install_a2news
install_a2chat
install_telnet
install_oysttyer