#!/usr/bin/env bash
  
script_name="$(basename $(realpath $0))"
working_dir="$(dirname $(realpath $0))"

#conf_file="${working_dir}/conf/${script_name%%.*}.conf"
conf_file="${working_dir}/conf/bbb.conf"

LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
log_file="${LOCK_DIR}/${script_name%%.*}.log"


# ----------
# Base Function(s)
# ----------

clean_up() {

   # Perform program exit housekeeping
   rm -rf "$LOCK_DIR"
   blank_line
   exit $1
}

echononl(){
   if $terminal ; then
      echo X\\c > /tmp/shprompt$$
      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
         echo -e -n "   $*\\c" 1>&2
      else
         echo -e -n "   $*" 1>&2
      fi
      rm /tmp/shprompt$$
   fi
}
fatal(){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mFatal\033[m ] $*"
   else
      echo -e "   [ Fatal ] $*"
   fi
   echo ""
   if $terminal ; then
      echo -e "             \033[1mScript terminated\033[m.."
   else
      echo -e "             Script terminated.."
   fi
   echo ""
   rm -rf $LOCK_DIR
   exit 1
}
error (){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mError\033[m ] $*"
   else
      echo "   [ Error ] $*"
   fi
   echo ""
}

info () {
   if $terminal ; then
      echo ""
      echo -e "   [ \033[32m\033[1minfo\033[m ] $*"
      echo ""
   fi
}

echo_ok() {
   if $terminal ; then
      echo -e "\033[85G[ \033[32mok\033[m ]"
   fi
}
echo_failed(){
   if $terminal ; then
      echo -e "\033[85G[ \033[1;31mfailed\033[m ]"
   fi
}
echo_skipped() {
   if $terminal ; then
      echo -e "\033[85G[ \033[33m\033[1mskipped\033[m ]"
   fi
}
echo_wait(){
   if $terminal ; then
      echo -en "\033[85G[ \033[5m\033[1m..\033[m ]"
   fi
}

trim() {
    local var="$*"
    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
    echo -n "$var"
}

blank_line() {
   if $terminal ; then
      echo ""
   fi
}

detect_os () {

   if $(which lsb_release > /dev/null 2>&1) ; then

      DIST="$(lsb_release -i | awk '{print tolower($3)}')"
      DIST_VERSION="$(lsb_release -r | awk '{print tolower($2)}')"
      DIST_CODENAME="$(lsb_release -c | awk '{print tolower($2)}')"

      if [[ "$DIST" = "debian" ]]; then
         if $(echo "$DIST_VERSION" | grep -q '\.') ; then
            DIST_VERSION=$(echo "$DIST_VERSION" | cut --delimiter='.' -f1)
         fi
      fi

   elif [[ -e "/etc/os-release" ]]; then

      . /etc/os-release

      DIST=$ID
      DIST_VERSION=${VERSION_ID}

   fi

   # remove whitespace from DIST and DIST_VERSION
   DIST="${DIST// /}"
   DIST_VERSION="${DIST_VERSION// /}"

}



# ----------
# - Jobhandling
# ----------

# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
# -
trap clean_up SIGHUP SIGINT SIGTERM

# - Create lock directory '$LOCK_DIR"
#
mkdir "$LOCK_DIR"


# ----------
# - Some checks ..
# ----------

# - Running in a terminal?
# -
if [[ -t 1 ]] ; then
   terminal=true
else
   fatal "Script must run in a terminal."
fi


# ==========
# - Begin Main Script
# ==========

# ----------
# - Headline
# ----------

if $terminal ; then
   echo ""
   echo -e "\033[1m----------\033[m"
   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
   echo -e "\033[1m----------\033[m"
fi


# ----------
#  Read Configurations from $conf_file
# ----------


# - Give your default values here
# -
DEFAULT_FQDN_HOSTNAME="$(hostname -f)"

if [[ -f "$conf_file" ]]; then
   source "$conf_file"
else
   warn "No configuration file '$conf_file' present.\n
             Loading default values.."
fi

[[ -n "$FQDN_HOSTNAME" ]] && DEFAULT_FQDN_HOSTNAME="$FQDN_HOSTNAME"


blank_line
echononl "Detect distribution/release of running OS.."
detect_os > "$log_file" 2>&1
if [[ $? -ne 0 ]]; then
	echo_failed
	error "$(cat "$log_file")"
else
	echo_ok
fi


FQDN_HOSTNAME=
echo ""
echo -e "\033[32m--\033[m"
echo ""
echo "Insert full qualified hostname for BigBlueButton Service"
echo ""
if [[ -n "$DEFAULT_FQDN_HOSTNAME" ]]; then
   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
      echononl "Full qualified hostname [${DEFAULT_FQDN_HOSTNAME}]: "
      read FQDN_HOSTNAME
      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
         FQDN_HOSTNAME=$DEFAULT_FQDN_HOSTNAME
      fi
      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
         FQDN_HOSTNAME=""
      fi
   done
else
   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
      echononl "Full qualified hostname: "
      read FQDN_HOSTNAME
      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
         echo -e "\n\t\033[33m\033[1mFull qualified hostname is reqired\033[m\n"
      fi
      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
         FQDN_HOSTNAME=""
      fi
   done
fi
HOSTNAME="${FQDN_HOSTNAME%%.*}"

echo ""
echo ""
echo -e "\t\033[32mStart pre-install script for BigBlueButton Service with the following parameters\033[m"
echo ""
echo -e "\tFull qualified Hostname..: $FQDN_HOSTNAME"
echo -e "\tHostname.................: $HOSTNAME"
echo ""
echo -e "\tOS Distribution..........: $DIST"
echo -e "\tDistribution's codename..: $DIST_CODENAME"
echo ""
echononl "einverstanden (yes/no): "
read OK
OK=${OK,,}
while [ "X$OK" != "Xyes" -a "X$OK" != "Xno" ]; do
   echononl "Wrong entry! [yes/no]: "
   read OK
   OK=${OK,,}
done
[ $OK = "yes" ] || fatal Repeat with other settings..


echo ""
echo ""


# Make the HTML5 client default
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mMake the HTML5 client the default client\033[m (no longer load the Flash client)"
   echo ""
fi
echononl "Set 'attendeesJoinViaHTML5Client=true'.."
if $(grep -q -E "^\s*attendeesJoinViaHTML5Client=true" \
     /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties 2> /dev/null) ; then
   echo_skipped
else
   perl -i -n -p -e "s/^(attendeesJoinViaHTML5Client=.*)/##!\1\nattendeesJoinViaHTML5Client=true/" \
      /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
fi

echononl "Set 'moderatorsJoinViaHTML5Client=true'.."
if $(grep -q -E "^\s*moderatorsJoinViaHTML5Client=true" \
     /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties 2> /dev/null) ; then
   echo_skipped
else
   perl -i -n -p -e "s/^(moderatorsJoinViaHTML5Client=.*)/##!\1\nmoderatorsJoinViaHTML5Client=true/" \
      /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties >> "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
fi

blank_line

# Assign the server a hostname
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mAssign the server a hostname '$FQDN_HOSTNAME'\033[m"
   echo ""
fi
echononl "Trigger command 'bbb-conf --setip $FQDN_HOSTNAME'"
echo_wait
bbb-conf --setip $FQDN_HOSTNAME > "$log_file" 2>&1
if [[ $? -ne 0 ]]; then
   echo_failed
   error "$(cat "$log_file")"
else
   echo_ok
   echo -e  "
\033[32m----------\033[m
\033[1mOutput from assigning a hostname 'bbb-conf --setip $FQDN_HOSTNAME' was:\033[m

$(cat "$log_file")
\033[32m----------\033[m
"
fi


# Configure FreeSWITCH for using SSL
#
# At file /etc/bigbluebutton/nginx/sip.nginx
#
# change:
#
#    proxy_pass http://203.0.113.1:5066;
#
# to
#    proxy_pass https://203.0.113.1:7443;
#                   ^               ^^^^
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mConfigure FreeSWITCH for using SSL\033[m"
   echo ""
fi

echononl "Replace 'http://' with https:// (/etc/bigbluebutton/nginx/sip.nginx).."
if $(grep -q -E "http://" /etc/bigbluebutton/nginx/sip.nginx 2> /dev/null) ; then
   perl -i -n -p -e "s#http://#https://#" /etc/bigbluebutton/nginx/sip.nginx > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

echononl "Replace port 5066 with 7443 (/etc/bigbluebutton/nginx/sip.nginx).."
if $(grep -q -E ":5066\s*;" /etc/bigbluebutton/nginx/sip.nginx 2> /dev/null) ; then
   perl -i -n -p -e "s#:5066\s*;#:7443;#" /etc/bigbluebutton/nginx/sip.nginx > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

blank_line

# Configure BigBlueButton to load session via HTTPS
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mConfigure BigBlueButton to load session via HTTPS\033[m"
   echo ""
fi

# file '/usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties'
#
# change:
#
#    bigbluebutton.web.serverURL=http://${FQDN_HOSTNAME}
#
# to:
#
#    bigbluebutton.web.serverURL=https://${FQDN_HOSTNAME}
#                                    ^
#
echononl "Setup 'bigbluebutton.web.serverURL' (bigbluebutton.properties)"
if $(grep -q -E "^\s*bigbluebutton.web.serverURL\s*=\s*http:" /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties 2> /dev/null) ; then
   perl -i -n -p -e "s#^(\s*bigbluebutton.web.serverURL=.*)#\#\#!\1\nbigbluebutton.web.serverURL=https://${FQDN_HOSTNAME}#" \
      /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

# file: /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties
#
# change:
#
#    JnlpUrl=https://${FQDN_HOSTNAME}/screenshare
#
# to:
#
#    JnlpUrl=https://${FQDN_HOSTNAME}/screenshare
#                ^
#
echononl "Setup 'jnlpUrl' (screenshare.properties)"
if $(grep -q -E "^\s*jnlpUrl\s*=\s*http:" /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties 2> /dev/null) ; then
   perl -i -n -p -e "s#^(\s*jnlpUrl\s*=.*)#\#\#!\1\njnlpUrl=https://${FQDN_HOSTNAME}/screenshare#" \
      /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

# file: /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties
#
# change:
#
#    jnlpFile=https://${FQDN_HOSTNAME}/screenshare/screenshare.jnlp
#
# to:
#
#    jnlpFile=https://${FQDN_HOSTNAME}/screenshare/screenshare.jnlp
#                 ^
#
echononl "Setup 'jnlpFile' (screenshare.properties)"
if $(grep -q -E "^\s*jnlpFile\s*=\s*http:" /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties 2> /dev/null) ; then
   perl -i -n -p -e "s#^(\s*jnlpFile\s*=.*)#\#\#!\1\njnlpFile=https://${FQDN_HOSTNAME}/screenshare/screenshare.jnlp#" \
      /usr/share/red5/webapps/screenshare/WEB-INF/screenshare.properties > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

# You must also update the file /var/www/bigbluebutton/client/conf/config.xml to 
# tell the BigBlueButton client to load components via HTTPS. You can do the update 
# with a single command
#
echononl "Change all 'http://' to 'https:/' (/var/www/bigbluebutton/client/conf/config.xml).." 
if $(grep -q -E "http://" /var/www/bigbluebutton/client/conf/config.xml 2> /dev/null) ; then
   sed -e 's|http://|https://|g' -i /var/www/bigbluebutton/client/conf/config.xml > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi


blank_line

# Adjust /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mAdjust file /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml\033[m"
   echo ""
fi

# file: /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml
#
# Change:
#
#  kurento:
#    wsUrl: ws://bbb.example.com/bbb-webrtc-sfu
#
#to
#
#  kurento:
#    wsUrl: wss://bbb.example.com/bbb-webrtc-sfu
#
echononl "Change 'wsUrl: ws://' to 'wsUrl: wss://'.."
if $(grep -q -E "wsUrl:\s*ws:" /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml 2> /dev/null) ; then
   perl -i -n -p -e "s#wsUrl:\s*ws:#wsUrl: wss:#" \
      /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi

# file: /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml
#
# Change:
#
# note:
#    enabled: true
#    url: http://bbb.example.com/pad
# to
#
#  note:
#    enabled: true
#    url: https://bbb.example.com/pad
#
echononl "Change 'url: http://' to 'url: https://'.."
if $(grep -q -E "^\s*url: http:" /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml 2> /dev/null) ; then
   perl -i -n -p -e "s#^(\s*url:\s*)http:#\1https:#" \
      /usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi


blank_line


# Modify the creation of recordings so they are served via HTTPS
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mModify the creation of recordings so they are served via HTTPS\033[m"
   echo ""
fi

# file: /usr/local/bigbluebutton/core/scripts/bigbluebutton.yml
#
# Change:
#
#    playback_protocol: http
#
# to:
#
#    playback_protocol: https
#
echononl "Change 'playback_protocol' to use https.."
if  $(grep -q -E "^\s*playback_protocol:\s*http\s*$" /usr/local/bigbluebutton/core/scripts/bigbluebutton.yml > "$log_file" 2>&1) ; then
   perl -i -n -p -e "s#^(\s*playback_protocol:\s*http.*)#\#\#!\1\nplayback_protocol: https#" \
      /usr/local/bigbluebutton/core/scripts/bigbluebutton.yml > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi
else
   echo_skipped
fi


if [[ -f "/var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp" ]] ; then

   blank_line


   # Also at 'API demo' Installation use SSL Protocol
   #
   if $terminal ; then
      echo ""
      echo -e "   \033[1mUse SSL Protocoll for API demos\033[m"
      echo ""
   fi

   # file: /var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp
   #
   # Change:
   #
   #    String BigBlueButtonURL = "http://${FQDN_HOSTNAME}/bigbluebutton/";
   #
   # To:
   #
   #    String BigBlueButtonURL = "https://${FQDN_HOSTNAME}/bigbluebutton/";
   #                                   ^
   #
   echononl "Change 'BigBlueButtonURL' to use SSL Protocil.."
   if $(grep -q -E "^\s*String\s+BigBlueButtonURL\s*=\s*\"http:" /var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp  2> /dev/null) ; then
      perl -i -n -p -e "s#^(\s*String\s+BigBlueButtonURL\s*=\s*\"http:.*)#//!\1\nString BigBlueButtonURL = \"https://${FQDN_HOSTNAME}/bigbluebutton/\";#" /var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp > "$log_file" 2>&1
      if [[ $? -ne 0 ]]; then
         echo_failed
         error "$(cat "$log_file")"
      else
         echo_ok
      fi
   else
      echo_skipped
   fi
fi

blank_line

# Restart BigBlueButton Service
#
if $terminal ; then
   echo ""
   echo -e "   \033[1mRestart BigBlueButton Service\033[m"
   echo ""
fi

echononl "Restart BigBlueButton Service - 'bbb-conf --restart'"
bbb-conf --restart > "$log_file" 2>&1
if [[ $? -ne 0 ]]; then
   echo_failed
   error "$(cat "$log_file")"
else
   echo_ok
   echo -e  "
\033[32m----------\033[m
\033[1mOutput from restarting BigBlueButton Service was:\033[m

$(cat "$log_file")
\033[32m----------\033[m
"
fi




clean_up 0