#!/bin/sh
# This shell script is launched by ESPartner.ftr or command line 
# and is supposed to launch in "theBrowser" with predefined 
# URL. 
# 
# Only two browsers are supported for now
#
#     (1) netscape
#     (2) lynx
# 
#  The netscape is a prefered browser
# 

Success=0
Failure=1
XMode=0
TargetHostName=""
WinList=""
WinId=""
TheURL=""
theBrowser=""

netscape="`which -f netscape`"
if [ ! -x "$netscape" ]; then
   netscape=""
fi

lynx="`which -f lynx`"
if [ ! -x "$lynx" ]; then
   lynx=""
fi

Xlynx="/usr/sbin/xwsh -display $DISPLAY -name Lynx -e $lynx"
portno="`fgrep -e sgi-esphttp /etc/services | cut -f2 | cut -f1 -d"/"`"

IsNetscapeRunning()
{
  # is netscape running on this system?
  
  netscapeOn="`ps -e | grep -i netscape | egrep -v grep | head -1`"
  if [ "$netscapeOn" = "" ] ; then
     return $Failure
  fi
  # may be
  # let's check lock file

  if [ -h "$HOME/.netscape/lock" ] > /dev/null; then
    return $Success
  else
    # ps again, in case previous ps caught a dying process
    sleep 1
    netscapeOn="`ps -e|grep -i netscape|egrep -v grep|head -1`"
    
    if [ "$netscapeOn" = "" ]; then
      return $Failure
    fi

    # Check lock again
    if [ -h "$HOME/.netscape/lock" ] > /dev/null; then
      return $Success
    fi
  fi
  return $Failure
}


FindWindowID()
{
  echo "$WinList" |            
  while read WinId PrName      
  do 
    if [ "$WinId" = "" ]; then  
      WinId="0"
      return $Success
    fi
    
    wndmozl=`2>/dev/null xprop -notype -id $WinId  _MOZILLA_VERSION   | \
             2>/dev/null cut -d"\"" -f2 | grep -v _MOZILLA_VERSION`
             
    wndhost=`2>/dev/null xprop -notype -id $WinId   WM_CLIENT_MACHINE | \
             2>/dev/null cut -d"\"" -f2`
  
    if [ "$wndhost" = "$TargetHostName" ]; then
      if [ "$wndmozl" != "" ]; then 
       return $Success
      fi
    fi
  done  
  WinId="0"
  return $Success
}

# ------------------- openNetscape ---------------------
# Open URL using netscape 
# Takes one argument: the URL.
openNetscape()
{
  TargetHostName="`uname -n`"

  #we want to launch Netscape in separate window
  IsNetscapeRunning
  if [ "$?" = "$Failure" ]; then    
       # it is simple then
      if  [ "$XMode" = "1" ]; then
        2>/dev/null $theBrowser -display $DISPLAY $1 &
      else
        $theBrowser -display $DISPLAY $1 &
      fi
  else
    # o-o-oh man this is pain 
    WinList=""
    if [ -x /usr/bin/X11/xlswins -a -x /usr/bin/X11/xprop ] > /dev/null; then
       WinList="`2>/dev/null /usr/bin/X11/xlswins -display $DISPLAY | grep -i netscape`"
    fi

    if [ "$WinList" = "" ]; then 
       # it looks like it is not possible to avoid locked cashe message and 
       # it is nothing we can do about it
       $theBrowser -display $DISPLAY $1 &
       return $Success
    fi
      
    FindWindowID  
    if [ "$WinId" != "0" ]; then  
       # window found, so we can use -remote api to connect to this window
       $theBrowser -display $DISPLAY -id $WinId -noraise -remote "openURL(`echo $1`,new-window)" &
    else
       # it looks like it is not possible to avoid locked cashe message and 
       # it is nothing we can do about it
       $theBrowser -display $DISPLAY $1 &
    fi
  fi
  
  return $Success
}

# #######################
# Script Starts here
# #######################

if [ "$1" = "-h" ]; then
# Display usage message
  echo  "Usage : launchESPartner [-h -l] [-host hostname]"
  echo  "  -h  -  displays this message"
  echo  "  -l  -  force to use Lynx browser"
  echo  "  -host hostname - launch ESP for host 'hostname'"
  exit 0
fi

# Check is there any terminal present
tty -s
if [ "$?" != "0" ]; then
# There is no terminal present
# we must report 
  XMode=1
fi

#
# Figure out what browser to use.
# check -l flag
# Netscape
# lynx
#

if [ "$1" = "-l" ]; then
  # force Lynx as a web browser
  if [ -x "$lynx" ]; then
     theBrowser="$lynx"
  else
    if  [ "$XMode" = "1" ]; then
      /usr/bin/X11/xconfirm \
      -h "Embedded Support Partner" \
      -icon error \
      -t "Unable to find Lynx WEB Browser" \
      -t "" \
      -t "Please, install Lynx WEB Browser and try again."
      -t "" \
      -t "ESP console launch operation aborted" \
      -b "OK" > /dev/null &
    else
      echo "ESP console launch operation aborted : Unable to find Lynx WEB Browser."
      echo "Please, install Lynx WEB browser and try again."
    fi
    exit 1
  fi   
  shift 1
 
elif [ -x "$netscape" ] > /dev/null; then
  # netscape exist
  theBrowser="$netscape"
elif [ -x "$lynx" ] > /dev/null; then 
  theBrowser="$lynx" 
else
  # Browser not found 
  if  [ "$XMode" = "1" ]; then
     /usr/bin/X11/xconfirm \
    -h "Embedded Support Partner" \
    -icon error \
    -t "Unable to determine your Web browser" \
    -t "" \
    -t "Please, install Netscape or Lynx web browser and try again."
    -t "" \
    -t "ESP console launch operation aborted" \
    -b "OK" > /dev/null &
  else
    echo "ESP console launch operation aborted : Unable to determine your Web browser."
    echo "Please, install Netscape or Lynx WEB browser and try again."
  fi  
  exit 1 
fi

# OK Browser found
# Now run through URLs. 
#

if [ $# -le 0 ]; then
  # there is no args left 
  # so we must launch ESP for localhost
  if [ "$theBrowser" = "$lynx" ]; then
     TheURL="http://localhost:$portno/index_sem.txt.html"
  else
     TheURL="http://localhost:$portno/index.html"
  fi   
  
elif [ "$1" = "-host" ]; then  
  # hostname is specified
  shift 1
  if [ $# -ge 0 ]; then 
     if [ "$theBrowser" = "$lynx" ]; then
        TheURL="http://$1:$portno/index_sem.txt.html"
     else
        TheURL="http://$1:$portno/index.html"
     fi   
  else   
     # hostname not found
    if  [ "$XMode" = "1" ]; then
      /usr/bin/X11/xconfirm \
      -h "Embedded Support Partner" \
      -icon error \
      -t "Hostname expected in the command line" \
      -t "" \
      -t "ESP console launch operation aborted" \
      -b "OK" > /dev/null  &
    else
      echo "ESP console launch operation aborted : Hostname expected in the command line."
    fi
    exit 1
  fi
  
else

  # Launch from file
  # read URL index
  LineToLaunch="$1"
 
  shift 1
  if [ $# -le 0 ]; then 
    if  [ "$XMode" = "1" ]; then
      /usr/bin/X11/xconfirm \
      -h "Embedded Support Partner" \
      -icon error \
      -t "Filename expected in the command line" \
      -t "" \
      -t "ESP console launch operation aborted" \
      -b "OK" > /dev/null &
    else
       echo "ESP console launch operation aborted : Filename expected in the command line."
    fi
   
    exit 1
  fi
  
  # Next Args must be a launchESPartnerType file 
  # and it must contains URL in it's $LineToLaunch's string
 
  TheURL=""
  if [ -r $1 ]; then
     TheURL="`head -$LineToLaunch $1 | tail -1`"
  else   
     if [ "$XMode" = "1" ]; then
        /usr/bin/X11/xconfirm \
            -h "Missing launchESPartnerType file" \
            -icon error \
            -t "The file that is containing ESP console URL was not found." \
            -t "" \
            -t "ESP console launch operation aborted" \
            -b "OK" > /dev/null &
     else
         echo "ESP console launch operation aborted : \n The file that is containing ESP console URL was not found."
     fi
     exit 1
  fi

  if [ "$TheURL" = "" ]; then
     if [ "$XMode" = "1" ]; then
        /usr/bin/X11/xconfirm \
            -h "Missing URL" \
            -icon error \
            -t "The line number $LineToLaunch does not contains URL in ESP console URL file." \
            -t "" \
            -t "ESP console launch operation aborted." \
            -b "OK" > /dev/null &
     else
         echo "ESP console launch operation aborted : \n The line number $LineToLaunch does not contains URL in ESP console URL file."
     fi
     exit 1
  fi
fi

# TheURL is ready, TheBrowser is ready
# Time to Launch
if   [ "$theBrowser" = "$netscape" ]; then

     openNetscape $TheURL &
     
elif [ "$theBrowser" = "$lynx" ]; then 

  if [ "$XMode" = "1" ]; then
     #we want to launch Lynx in separate window
     $Xlynx -cache=0 $TheURL &
  else
     #we want to launch Lynx in the same window
     $lynx  -cache=0 $TheURL
  fi
fi

################################
# This is it folks             #
################################