#!/bin/bash
############
#===Simple Server Skript===
# Author Christoph Schulz <cs@chsc.de>
# Version of 06 Apr 2013
#
#==INFORMATION==
# This skript uses SFTP only!
#==Configuration==
# - server: The server, e.g. ssh.example.com
server=''
###
# - user: The remote user.
#		Leave blank to use current user
user=''
###
# - key: SSH key for the account
#		Leave blank to use key ~/.ssh/id_rsa
key=''
###
# - sshport: Set the SSH port. Leave blank to use default port.
sshport=''
###
# - sshfspath: Path to the point where the remote directories should be mounted.
#		Leave blank to use directory ~/sshfs/(user)/(server)/(path)/(on)/(server)
sshfspath=''
###
# - sshfsoptions: Extra options for SSHFS, e.g. follow_symlinks
#   		Different SSH Port is set @sshport and automatically added here.
#		Use Format option=value,option2=value2,option
sshfsoptions=''
#==Comments==
#
#
#
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# Do not edit below this line! <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
#Change to Home
cd ~
#Checks if $server is empty
if [ -z $server ]; then
	echo 'No server given!'
	echo 'Please add a server to the configuration included in the script.'
	exit 0
fi
#Checks if $user is emtpy
if [ -z $user ]; then
	#Set $user to current user
	user=$USER
fi
#Checks if the key is empty
if [ -z $key ]; then
	#Set $key to default file name
	key=$HOME'/.ssh/id_rsa'
fi
#Set name for (temporary) ftp bath file
batch=$server'.ftpbatch.temp'
#Set up the address connection to
address=$user'@'$server
#Set SSHFS Path to default if empty
if [ -z $sshfspath ]; then
	sshfspath='sshfs/'$user'/'$server
fi
case $1 in
	#SSH; Standart Option; use following argument as remote command
	ssh|'')
		if [ -z $sshport ];then
			#Use standart port; -t for remote tty, eg. for sudo
			ssh -ti $key $address $2
		else
			#Use different port
			ssh -p $sshport -ti $key $address $2
		fi
	;;
	#SFTP
	ftp|sftp)
		#Options for the sftp command
		options=''
		if [ ! -z $sshport ];then
			#Set different port
			options='-P '$sshport
		fi
		case $2 in
			#If there is no next argument start SFTP client console
			'')
				sftp $options -i $key $address
			;;
			#If there is a next argument use it as command
			'string')
				echo $3 > $batch
				sftp $options -i $key -b $batch $address
				rm $batch
			;;
			#If there is a next argument use this as SFTP batch file name
			'batch')
				sftp $options -i $key -b $3 $address
			;;
		esac
	;;
	#Explicit no X11Forwarding
	'ssh-no-x')
		#Check if should use different SSH port
		if [ -z $sshport ]; then
			ssh -xti $key $address $2
		else
			#Using different SSH port
			ssh -p $sshport -txi $key $address $2
		fi
	;;
	#Mount a remote directory via sshfs
	'sshfs')
		#Check if a remote path is given
		if [ -z $2 ]; then
			echo "A Path is required!"
			exit 0
		fi
		#Store remote path
		path=$2
		#Set Remote Path to Remote Home if Path is empty
		if [ -z $path ]; then
			path=`./netcup ssh 'echo $HOME'`
		fi
		#Append Remote path to $sshfspath
		if [ ${path:0:1} == '/' ]; then
			sshfspath=$sshfspath$path
		else
			#Add a ´/´ to the begin of $path if not present
			sshfspath=$sshfspath'/'$path
		fi
		#Check for unmount
		if [ ! -z $3 ]; then
			if [ $3 == '-u' ]; then
				#Unmount
				fusermount $sshfspath -u
				exit 0
			fi
		fi
		#Create target directory if not exist
		if [ ! -d $sshfspath ]; then
			mkdir -p $sshfspath
		fi
		#Adds Identity File to options
		if [ -z $sshfsoptions ]; then
			#No sshfs options present
			sshfsoptions='IdentityFile='$key
		else
			#sshfs options present
			sshfsoptions='IdentityFile='$key','$sshfsoptions
		fi
		#Check if should use different SSH Port
		if [ -z $sshport ];then
			#normal
			sshfs $address':'$path $sshfspath -o $sshfsoptions
		else
			#use different port
			sshfs $address':'$path $sshfspath -p $sshport -o $sshfsoptions
		fi
	;;
	"help")
		echo './FILE : Open a SSH Connection to $server with user '$user
		echo './FILE ssh \"[CMD]\" : Executing the Command [CMD] on '$server
		echo './FILE ftp : Open a FTP Connection to '$server' with '$user
		echo './FILE ftp string \"[STRING]\" :  Use [STRING] as FTP Command(s)'
		echo './FILE ftp batch \"[BATCH]\" : Use a Batch File [BATCH]'
		echo './FILE ssh-no-x : Disable X11 Forwarding for SSH Connection (if enabled in ssh_conf)'
		echo './FILE sshfs \"[PATH]\" : Mount the Remote [PATH] to '$sshfspath'/[PATH]'
		echo './FILE sshfs \"[PATH]\" -u : Unmount Remote [PATH] from '$sshfspath'/[PATH]'
	;;
esac