#!/bin/bash
#
# Copyright (c) 2008-2009 by BigBlueButton
#
# This file is part of BigBlueButton - http://www.bigbluebutton.org
#
# BigBlueButton is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with BigBlueButton; if not, If not, see <http://www.gnu.org/licenses/>.
#
# Author(s):
#       Fred Dixon <ffdixon@bigbluebutton.org>
#
# Changelog:
#       2009-10-18      Inital Version          FFD


# set -x

check_root() {
	if [ $EUID == 0 ]; then
		echo "This opearation should not be run as root."
		echo 
		echo "If this operation needs to execute an operation as root, you'll be asked for"
		echo "your password to execute the operation using sudo."
		exit 1
	fi
}

usage () {
	echo "$0 [options] [<file>]"
	echo
	echo "Options:"
	echo "   --help                           This message"
	echo "   --version                        Display BigBlueButton version"
	echo "   --check                          Check current setup"
	echo
	echo "   --setip <host>                   Set IP/Hostname for BigBlueButton's configuration"
	echo
	echo "   --setup-samba                    Setup samba share (VM only)"
	echo "   --setup-dev [bbb-web|bbb-client|bbb-apps] "
	echo "                                    Setup dev environment (VM only)"
	echo
}

# utility function to make a copy of the conf file
check_and_backup () {
	# can we write to the configuration file?
	if [ ! -w $1 ]; then
		echo "Cannot write to $1!"
		exit 1
	fi

	# let's see if we need a copy
	if [ "$TO_BACKUP" = "Y" ]; then
		cp $1 $1.bak
		TO_BACKUP="N"
	fi
}

# 3 paramenter: the file, the variable name, the new value
change_var_value () {
	check_and_backup $1
	sed -i "s<^[[:blank:]#]*\(${2}\).*<\1=\"${3}\"<" $1
}
# comment lines matching $2 ($1 is the file)
comment () {
	check_and_backup $1
	sed -i "s<^[[:blank:]]*\(${2}.*\)<#\1<" $1
}
# comment lines matching $2 ($1 is the file)
uncomment () {
	check_and_backup $1
	sed -i "s<^[#[:blank:]]*\(${2}.*\)<\1<" $1
}

if [ $# -eq 0 ]; then
	usage
	exit 1
fi

# Parse the parameters
while [ $# -gt 0 ]; do
	if [ "$1" = "-h" -o "$1" = "-help" -o "$1" = "?" -o "$1" = "--help" ]; then
		usage
		exit 1
	fi

	if [ "$1" = "-check" -o "$1" = "--check" -o "$1" = "-c" ]; then
		CHECK=1
		shift 
		continue
	fi

	if [ "$1" = "--setup-samba" -o "$1" = "-setup-samba" ]; then
		SAMBA=1
		shift
		continue
	fi		

	if [ "$1" = "--version" -o "$1" = "-version" -o "$1" = "-v" ]; then
		VERSION=1
		shift
		continue
	fi		

	#
	# all other parameters requires at least 1 argument
	#
	
	if [ $# -lt 2 ]; then
		usage
		exit 1
	fi

	if [ "$1" = "-setip" -o "$1" = "--setip" ]; then
		HOST="${2}"
		shift; shift
		continue
	fi		

	if [ "$1" = "--setup-dev" -o "$1" = "-setup-dev" ]; then
		SETUPDEV="${2}"
		shift; shift
		continue
	fi		

	usage 
	exit 1
done


#
# Version 
#
if [ $VERSION ]; then

	echo 
	dpkg -l | grep bbb

	exit 0
fi


#
# Setup samba
#

if [ $SAMBA ]; then
        #
        # Instal Samba
        #
        if ! dpkg-query -s samba > /dev/null 2>&1; then
                sudo apt-get install --force-yes samba ant
        fi

        #
        # Add a share to samba
        #
        if ! grep -q $USER /etc/samba/smb.conf; then

                echo ";
; BigBlueButton: Share the development directory
[$USER]
   comment = BigBlueButton Development share
   path = /home/$USER
   browseable = yes
   read only = no
   create mask = 0755
   directory mask = 0775
   guest ok = yes
   force user = $USER
" | sudo tee -a /etc/samba/smb.conf > /dev/null 2>&1

                sudo /etc/init.d/samba restart

        echo "
You can now access your development folder through:

        \\\\$(hostname)\\$USER

If you are running a development environment on Windows (such as using Eclipse or FlexBuilder),
you can map the above path to a drive letter.
"
        else
                echo "Already detected a definition for $USER in /etc/samba/smb.conf"
                echo "No changes were made to /etc/samba/smb.conf"
        fi
fi


#
# Setup the development environemnt.
#

if [ $SETUPDEV ]; then
	check_root

        if [ ! -d ~/dev ]; then
		mkdir ~/dev
	fi

	if [ $SETUPDEV == "bbb-web" ]; then
            if [ ! -d ~/dev/bbb-web ]; then

		echo "# Setting up ~/dev/bbb-web"
                echo "  svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-web bbb-web"
		
                cd ~/dev
                svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-web bbb-web

		IP="$(ifconfig eth0 | sed -n '/inet /{s/.*addr://;s/ .*//;p}')"

		echo "# Setting IP address $IP in ~/.grails/bigbluebutton-config.properties"
		mkdir -p ~/.grails
		echo "bigbluebutton.web.serverURL=http://$IP" > ~/.grails/bigbluebutton-config.properties

		echo "# Enabling $USER to write to /var/bigbluebutton to upload slides"
		sudo chmod -R ugo+rw /var/bigbluebutton

		echo "
# Done.  To run your local build of bbb-web:

	sudo /etc/init.d/tomcat6 stop
	cd ~/dev/bbb-web
	ant
"
            fi
	fi

	if [ $SETUPDEV == "bbb-client" ]; then
            if [ ! -d ~/dev/bbb-client ]; then

		echo "# Setting up ~/dev/bbb-client"
                echo "  svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-client bbb-client"

                cd ~/dev
                svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-client bbb-client

		#
		# Setup the directories so we can point /etc/nginx/sites-available/bigbluebutton to this
		# local copy of the client
		#
        	if [ ! -d ~/dev/bbb-client/bin ]; then
			mkdir -p ~/dev/bbb-client/bin
		fi

        	if [ ! -d ~/dev/bbb-client/bin/conf ]; then
			mkdir -p ~/dev/bbb-client/bin/conf
		fi

		if [ ! -h ~/dev/bbb-client/client ]; then
			ln -s ~/dev/bbb-client/bin ~/dev/bbb-client/client
		fi

		echo "Modifying /etc/nginx/sites-available/bigbluebutton to point to your local copy of bbb-client"
		sudo sed -i "s/\/var\/www\/bigbluebutton;/\/home\/firstuser\/dev\/bbb-client;/g" \
			/etc/nginx/sites-available/bigbluebutton
		sudo /etc/init.d/nginx restart	

		echo "# Copying /var/www/bigbluebutton/client/conf/config.xml to ~/dev/bbb-client/bin/conf/config.xml"
		cp /var/www/bigbluebutton/client/conf/config.xml ~/dev/bbb-client/bin/conf/config.xml

		echo "
# Done.  To build your local build of bbb-client:

	cd ~/dev/bbb-client
	ant

# The nginx server now loads the BigBlueButton Flash client from 
# /home/firstuser/dev/bbb-client.
"
	    fi
	fi

	if [ $SETUPDEV == "bbb-apps" ]; then
            if [ ! -d ~/dev/bbb-apps ]; then

		echo "# Setting up ~/dev/bbb-apps:"
  		echo "  svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-apps bbb-apps"
           
                cd ~/dev
                svn checkout http://bigbluebutton.googlecode.com/svn/trunk/bigbluebutton-apps bbb-apps
            
             fi 

		#
		# We're going to make it easier to deploy by giving write access to others to 
		# /usr/share/red5/webapps
		#
		sudo chmod o+w /usr/share/red5/webapps

		#
		# Let's remove the existing bbb-apps
		#
		if dpkg-query -s bbb-apps | grep "install ok installed" > /dev/null 2>&1; then
        		sudo apt-get purge --yes bbb-apps
		fi

		if [ ! -f ~/.bbb-apps-build.properties ]; then
			echo "#
# Override the default properties for bbb-apps
#
red5.home = /usr/share/red5
" > ~/.bbb-apps-build.properties
		fi

		#
		# Setup the directories so we can point /etc/nginx/sites-available/bigbluebutton to this
		# local copy of the client
		#
		echo "
# Done.  To run your local build of bbb-apps:

    sudo /etc/init.d/red5 stop
    cd ~/dev/bbb-apps
    ant deploy					
    sudo -u red5 /usr/share/red5/red5.sh		

# To restore the packaged version of bbb-apps:

    rm -rf /usr/share/red5/webapps/bigbluebutton
    sudo apt-get install bbb-apps
    sudo /etc/init.d/red5 start
"

	fi




fi


#
# Check current setup
#
if [ $CHECK ]; then

        echo "Current Configuration:"

        IP=$(cat /var/www/bigbluebutton/client/conf/config.xml | sed -n '/porttest /{s/.*host="//;s/".*//;p}')
        echo
        echo "/var/www/bigbluebutton/client/conf/config.xml (bbb-client)"
        echo "                 IP for tunnel check: $IP"

        IP=$(cat /var/www/bigbluebutton/client/conf/config.xml | sed -n '/uri.*video/{s/.*rtmp:\/\///;s/\/.*//;p}')
        echo "                  IP for rtmp (red5): $IP"

        HOST=$(cat /var/www/bigbluebutton/client/conf/config.xml | sed -n '/recordingHost/{s/.*recordingHost="http:\/\///;s/"//;p}')
        echo "          host for bbb-web interface: $HOST"

        IP=$(cat /etc/nginx/sites-available/bigbluebutton | sed -n '/server_name/{s/.*name[ ]*//;s/;//;p}')
        echo
        echo "/etc/nginx/sites-available/bigbluebutton (configuration file nginx)"
        echo "                         server_name: $IP"

        PORT=$(cat /etc/nginx/sites-available/bigbluebutton | sed -n '/listen/{s/.*listen[ ]*//;s/;//;p}')
        echo "                                port: $PORT"

	BBB_CLINET_DOC_ROOT=$(cat /etc/nginx/sites-available/bigbluebutton | grep \/client -A 1 | grep root  | sed -n '{s/[ ]*root[ ]*//;s/;//;p}') 
        echo "                client document root: $BBB_CLINET_DOC_ROOT"

        HOST=$(cat /var/lib/tomcat6/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties | sed -n '/bigbluebutton.web.serverURL/{s/.*\///;p}')
        echo
        echo "/var/lib/tomcat6/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (for bbb-web)"
        echo "                                host: $HOST"

	exit 0
fi



# if asked to print the version that's all we do
if [ -n "$HOST" ]; then

	#
	# Just use the IP for port test in /var/www/bigbluebutton/client/conf/config.xml
	#
	echo "Assigning $HOST for testing for firewall in /var/www/bigbluebutton/client/conf/config.xml"
	sudo sed -i "s/porttest host=\(\"[^\"]*\"\)/porttest host=\"$HOST\"/g" /var/www/bigbluebutton/client/conf/config.xml
	echo "Assigning $HOST for rtmp:// in /var/www/bigbluebutton/client/conf/config.xml"
	sudo sed -i "s/rtmp:\/\/\([^\"\/]*\)\([\"\/]\)/rtmp:\/\/$HOST\2/g" /var/www/bigbluebutton/client/conf/config.xml

	echo "Assigning $HOST for servername in /etc/nginx/sites-available/bigbluebutton"
	sudo sed -i "s/server_name  .*/server_name  $HOST;/g" /etc/nginx/sites-available/bigbluebutton

	#
	# Use port for remaining substitutions
	#
	if [ $PORT ]; then
		HOST="$HOST:$PORT"
	fi

	#
	# Update configuration for BigBlueButton client
	#
	echo "Assigning $HOST for http:// in /var/www/bigbluebutton/client/conf/config.xml"
	sudo sed -i "s/http:\/\/\([^\"\/]*\)\([\"\/]\)/http:\/\/$HOST\2/g" /var/www/bigbluebutton/client/conf/config.xml


	#
	# Update configuration for BigBlueButton web app
	#
	echo "Assigning $HOST for web application URL in /var/lib/tomcat6/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties"

	sudo sed -i "s/bigbluebutton.web.serverURL=http:\/\/.*/bigbluebutton.web.serverURL=http:\/\/$HOST/g" \
				/var/lib/tomcat6/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties

	# cat /var/lib/tomcat6/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties

	#
	# Update nginx
	#

	if [ $PORT ]; then
		echo "Assigning $PORT for listen in /etc/nginx/sites-available/bigbluebutton"
		sudo sed -i "s/listen  .*/listen  $PORT;/g" /etc/nginx/sites-available/bigbluebutton
	fi

	if ! grep -q server_names_hash_bucket_size /etc/nginx/nginx.conf; then
		sudo sed -i "s/gzip  on;/gzip  on;\n    server_names_hash_bucket_size  64;/g" /etc/nginx/nginx.conf
	fi

	echo "Restarting tomcat6 and nginx ..."
	sudo /etc/init.d/tomcat6 restart  > /tmp/result 2>&1;cat /tmp/result;rm /tmp/result
	sudo /etc/init.d/nginx restart

	exit 0
fi