#!/bin/sh

# Function that, when given gsdlpath as parameter, will return the
# version of greenstone that is to run (2 or 3). If things are not,
# this program will exit here.
get_version() {
    # first parameter is value of gsdlpath
    if [ -f "${1}/gs3-setup.sh" ]; then
	return 3
    elif [ -f "${1}/setup.bash" ]; then
	return 2
    else
	echo "Error: can't determine which Greenstone version is being run."
	exit 1
    fi
}

# Function that is passed the following paramters (in order):
# - the gsdlpath (GS3 home, GS2 home or gs2build for GS3), 
# - the version of greenstone that's running, and 
# - the language GLI is set to
# and checks the installation. 
# If things are not right, this program will exit here.
check_installation() {
# Check that the Greenstone installation looks OK
    if [ "$3" = "es" ]; then
	echo "Revisando GSDL: $1"
    elif [ "$3" = "fr" ]; then
	echo "Vérification de GSDL: $1"
    elif [ "$3" = "ru" ]; then
	echo "ðÒÏ×ÅÒËÁ GSDL: $1"
    else
	echo "Checking GSDL: $1"
    fi
    # even if we are only checking for gs2build (gsdl2path), we still 
    # need the file setup.bash to exist in the following condition:
    if [ ! -f "${1}/gs3-setup.sh" -a ! -f "${1}/setup.bash" ] ; then
	echo
	if [ "$3" = "es" ]; then
	    echo "No se pudo encontrar la instalación de Greenstone $2 o está incompleta."
	    echo "Trate de reinstalar Greenstone $2 y a continuación ejecute nuevamente"
	    echo "este guión."
	elif [ "$3" = "fr" ]; then
	    echo "L'installation de Greenstone $2 est introuvable ou incomplète."
	    echo "Essayez de réinstaller Greenstone $2 et exécutez ce script à nouveau."
	elif [ "$3" = "ru" ]; then
	    echo "éÎÓÔÁÌÌÑÃÉÑ Greenstone $_version ÎÅ ÂÙÌÁ ÎÁÊÄÅÎÁ ÉÌÉ ÏÎÁ ÎÅÐÏÌÎÁ."
	    echo "ðÏÐÒÏÂÕÊÔÅ ÐÏ×ÔÏÒÎÏ ÕÓÔÁÎÏ×ÉÔØ Greenstone $2, Á ÚÁÔÅÍ ××ÅÓÔÉ ÜÔÏÔ ÓËÒÉÐÔ ÓÎÏ×Á."
	else
	    echo "The Greenstone $2 installation could not be found, or is incomplete."
	    echo "Try reinstalling Greenstone $2 then running this script again."
	fi
	exit 1
    fi
}

glilang=en

if [ "x$PROGNAME" = "x" ] ; then
  if [ "$glilang" = "es" ]; then
    PROGNAME="Biblioteca Digital Greenstone"
  elif [ "$glilang" = "fr" ]; then
    PROGNAME="Bibliothécaire Greenstone"
  elif [ "$glilang" = "ru" ]; then
    PROGNAME="ÉÎÔÅÒÆÅÊÓ Greenstone"
  else
    PROGNAME="Greenstone Librarian Interface"
  fi
fi

if [ "x$PROGABBR" = "x" ] ; then
    PROGABBR="GLI"
fi

if [ "x$PROGNAME_EN" = "x" ] ; then
    PROGNAME_EN="Greenstone Librarian Interface"
fi

echo
if [ "$glilang" = "es" ]; then
    echo "Interfaz de la $PROGNAME ($PROGNAME_EN - $PROGABBR)"
    echo "Copyright (C) 2006, New Zealand Digital Library Project, University Of Waikato"
    echo "La Interfaz de la $PROGNAME NO INCLUYE ABSOLUTAMENTE NINGUNA GARANTÍA."
    echo "Para mayor información vea los términos de la licencia en LICENSE.txt"
    echo "Este es un software abierto, por lo que lo invitamos a que lo distribuya de forma gratuita"
elif [ "$glilang" = "fr" ]; then
    echo "Interface du $PROGNAME ($PROGNAME_EN - $PROGABBR)"
    echo "Copyright (C) 2006, New Zealand Digital Library Project, University Of Waikato"
    echo "$PROGABBR est fourni sans AUCUNE GARANTIE; pour des détails, voir LICENSE.txt"
    echo "Ceci est un logiciel libre, et vous êtes invité à le redistribuer"
elif [ "$glilang" = "ru" ]; then
    echo "âÉÂÌÉÏÔÅÞÎÙÊ $PROGNAME ($PROGNAME_EN - $PROGABBR)"
    echo "Copyright (C) 2006, New Zealand Digital Library Project, University Of Waikato"
    echo "âéç ÎÅ ÄÁÅÔ áâóïìàôîï îéëáëéè çáòáîôéê; ÄÅÔÁÌÉ ÓÍ. × ÔÅËÓÔÅ LICENSE.TXT"
    echo "üÔÏ - Ó×ÏÂÏÄÎÏ ÒÁÓÐÒÏÓÔÒÁÎÑÅÍÏÅ ÐÒÏÇÒÁÍÍÎÏÅ ÏÂÅÓÐÅÞÅÎÉÅ É ÷Ù ÍÏÖÅÔÅ ÒÁÓÐÒÏÓÔÒÁÎÑÔØ ÅÇÏ"
else
    echo "$PROGNAME ($PROGABBR)"
    echo "Copyright (C) 2006, New Zealand Digital Library Project, University Of Waikato"
    echo "$PROGABBR comes with ABSOLUTELY NO WARRANTY; for details see LICENSE.txt"
    echo "This is free software, and you are welcome to redistribute it"
fi
echo

##  -------- Run the Greenstone Librarian Interface --------

# This script must be run from within the directory in which it lives
thisdir=`pwd`
if [ ! -f "${thisdir}/gli.sh" ]; then
    if [ "$glilang" = "es" ]; then
        echo "Este guión deberá ejecutarse desde el directorio en el que reside."
    elif [ "$glilang" = "fr" ]; then
	echo "Ce script doit être exécuté à partir du répertoire dans lequel il se trouve."
    elif [ "$glilang" = "ru" ]; then
	echo "üÔÏÔ ÓËÒÉÐÔ ÄÏÌÖÅÎ ÂÙÔØ ×ÚÑÔ ÉÚ ÄÉÒÅËÔÏÒÉÉ, × ËÏÔÏÒÏÊ ÏÎ ÒÁÓÐÏÌÏÖÅÎ"
    else
	echo "This script must be run from the directory in which it resides."
    fi
    exit 1
fi


##  ---- Determine GSDLHOME ----
## gsdlpath can be either Greenstone 3 or Greenstone 2
gsdlpath=
# Some users may set the above line manually


# This variable is set automatically:
_version=
if [ "x$gsdlpath" != "x" ]; then
    get_version $gsdlpath
    _version=$?
# otherwise $gsdlpath is not yet set
else
    # Check the environment variable first
    # Check whether environment variables for both GS2 and GS3 are set
    # and if so, warn the user that we have defaulted to GS3
    if [ "x$GSDLHOME" != "x" -a "x$GSDL3SRCHOME" != "x" ]; then
        # _version not set, but both env vars set, so default to 3
	_version=3
	gsdlpath=$GSDL3SRCHOME
	echo "Both Greenstone 2 and Greenstone 3 environments are set." 
	echo "It is assumed you want to run Greenstone 3."
	echo "If you want to run Greenstone 2, please unset the"
	echo "environment variable GSDL3SRCHOME before running GLI."
	echo ""
    elif [ "x$GSDL3SRCHOME" != "x" ]; then
	echo "Only gsdl3srchome set"
	gsdlpath=$GSDL3SRCHOME
	_version=3
	echo "$gsdlpath"
    elif [ "x$GSDLHOME" != "x" ]; then
	gsdlpath=$GSDLHOME
	_version=2
    # If it is not set, assume that the GLI is installed as a subdirectory of Greenstone
    else
	gsdlpath=`(cd .. && pwd)`
	# Still need to find what version we are running:
	# GS3 main directory contains file gs3-setup.sh, GS2 only setup.bash
	get_version $gsdlpath
	_version=$?
    fi
fi

echo "Greenstone version found: $_version"

# Check that the main Greenstone installation for the version we're running looks OK
check_installation $gsdlpath $_version $glilang


# Need to source the correct setup file depending on whether we are running
# gs3 or gs2
# If we're running version GS2
if [ "$_version" -eq 2 ]; then
    # Setup Greenstone 2, unless it has already been done
    if [ "x$GSDLHOME" = "x" ]; then
	cd "$gsdlpath"
	. setup.bash
	cd "$thisdir"
    fi
# else, if we're running GS3
elif [ "$_version" -eq 3 ]; then
    # Setup Greenstone 3, unless it has already been done
    if [ "x$GSDL3HOME" = "x" -o "x$GSDL3SRCHOME" = "x" ]; then
	cd "$gsdlpath"
	. gs3-setup.sh
	cd "$thisdir"
    fi
    
    ## if Greenstone version 3 is running, we want to set gsdl2path
    ##  ---- Determine GSDLHOME ----
    ## may be already set, or manually entered here.
    gsdl2path=
    
    # Some users may set the above line manually
    if [ "x$gsdl2path" = "x" ]; then
        # Check the environment variable first
	if [ "x$GSDLHOME" != "x" ]; then
	    echo "GSDLHOME environment variable is set to $GSDLHOME."
	    echo "Will use this to find build scripts."
	    gsdl2path=$GSDLHOME
        # If it is not set, assume that the gs2build subdirectory of Greenstone 3 exists
	else
	    gsdl2path=$GSDL3SRCHOME/gs2build
	fi
    fi
    # Check that Greenstone 3's Greenstone 2 stuff looks OK (in gs2build)
    check_installation $gsdl2path "" $glilang
  
    # Setup Greenstone 3's gs2build, unless it has already been done
    if [ "x$GSDLHOME" = "x" ]; then
	cd "$gsdl2path"
	. setup.bash
	cd "$thisdir"
    fi

else 
    echo "Greenstone version unknown."    
    exit 1
fi

echo
if [ "x$GSDL3SRCHOME" != "x" ]; then
    echo "GSDL3SRCHOME is: $GSDL3SRCHOME"
fi
if [ "x$GSDL3HOME" != "x" ]; then
    echo "GSDL3HOME is: $GSDL3HOME"
fi
if [ "x$GSDLHOME" != "x" ]; then
    echo "GSDLHOME is: $GSDLHOME"
fi
echo

##  ---- Check Perl exists ----
perlpath=

# Some users may set the above line manually
if [ "x$perlpath" = "x" ]; then
    # Check if Perl is on the search path
    perlpath=`which perl 2> /dev/null`
fi

# Check that a Perl executable has been found
if [ "$glilang" = "es" ]; then
    echo "Revisando Perl: $perlpath"
elif [ "$glilang" = "fr" ]; then
    echo "Vérification de Perl: $perlpath"
elif [ "$glilang" = "ru" ]; then
    echo "ðÒÏ×ÅÒËÁ Perl: $perlpath"
else
    echo "Checking Perl: $perlpath"
fi
if [ ! -x "$perlpath" ] ; then
    echo
    if [ "$glilang" = "es" ]; then
	echo "La Interfaz de la $PROGNAME requiere Perl para "
	echo "poder operar, pero éste no aparece en su sistema. Por favor asegúrese "
	echo "de que Perl está instalado y se encuentra en su ruta de búsqueda. A "
	echo "continuación ejecute nuevamente este guión."
    elif [ "$glilang" = "fr" ]; then
	echo "$PROGNAME nécessite Perl pour son fonctionnement,"
	echo "mais perl n'a pas pu être détecté dans votre système. Veuillez vous "
	echo "assurer que perl est installé et est spécifié dans votre chemin de "
	echo "recherche, puis redémarrez ce script."
    elif [ "$glilang" = "ru" ]; then
	echo "âÉÂÌÉÏÔÅÞÎÙÊ $PROGNAME ÔÒÅÂÕÅÔ Perl, ÞÔÏÂÙ ÉÍÅÔØ ×ÏÚÍÏÖÎÏÓÔØ"
	echo "ÒÁÂÏÔÁÔØ, ÎÏ Perl ÎÅ ÂÙÌ × ×ÁÛÅÊ ÓÉÓÔÅÍÅ. ðÏÖÁÌÕÊÓÔÁ, ÐÏÄÔ×ÅÒÄÉÔÅ, ÞÔÏ "
	echo "Perl ÕÓÔÁÎÏ×ÌÅÎ É ÎÁÈÏÄÉÔÓÑ ÎÁ ×ÁÛÅÍ ÐÕÔÉ ÐÏÉÓËÁ, ÚÁÔÅÍ ÐÏ×ÔÏÒÎÏ××ÅÄÉÔÅ"
	echo "ÜÔÏÔ ÓËÒÉÐÔ."
    else
	echo "The $PROGNAME requires Perl in order to operate,"
	echo "but perl could not be detected on your system. Please ensure that perl"
	echo "is installed and is on your search path, then rerun this script."
    fi
    exit 1
fi


## ---- Check Java exists ----
javapath=

# Some users may set the above line manually
if [ "x$javapath" = "x" ]; then

    # If it is set, use the JAVA_HOME environment variable
    if [ "x$JAVA_HOME" != "x" ]; then
	javapath="$JAVA_HOME/bin/java"

    # Check if Java is on the search path
    else
	javapath=`which java 2> /dev/null`
    fi
fi

# Check that a Java executable has been found
if [ "$glilang" = "es" ]; then
    echo "Revisando Java: $javapath"
elif [ "$glilang" = "fr" ]; then
    echo "Vérification de Java: $javapath"
elif [ "$glilang" = "ru" ]; then
    echo "ðÒÏ×ÅÒËÁ Java: $javapath"
else
    echo "Checking Java: $javapath"
fi
if [ ! -x "$javapath" ]; then
    echo
    if [ "$glilang" = "es" ]; then
	echo "No se pudo localizar una versión apropiada de Java. Usted deberá "
	echo "instalar un Ambiente de Ejecución Java (versión 1.4 o superior) "
	echo "antes de correr la Interfaz de la $PROGNAME."
    elif [ "$glilang" = "fr" ]; then
	echo "Une version adéquate de Java n'a pas pu être localisée."
	echo "Vous devez installer un Java Runtime Environment (version 1.4 ou"
	echo "supérieur) avant de démarrer $PROGNAME."
    elif [ "$glilang" = "ru" ]; then
	echo "îÅ ÕÄÁÌÏÓØ ÏÐÒÅÄÅÌÉÔØ ÍÅÓÔÏÎÁÈÏÖÄÅÎÉÅ ÓÏÏÔ×ÅÔÓÔ×ÕÀÝÅÊ ×ÅÒÓÉÉ Java."
	echo "÷Ù ÄÏÌÖÎÙ ÕÓÔÁÎÏ×ÉÔØ Java Runtime Environment (×ÅÒÓÉÀ 1.4 ÉÌÉ ×ÙÛÅ)"
	echo "ÐÅÒÅÄ ××ÏÄÏÍ ÂÉÂÌÉÏÔÅÞÎÏÇÏ $PROGNAME."
    else
	echo "Failed to locate an appropriate version of Java. You must install a"
	echo "Java Runtime Environment (version 1.4 or greater) before running the"
	echo "$PROGNAME."
    fi
    exit 1
fi


## -- Check the version of Java is new enough (1.4.0 or higher) to run the GLI --
`$javapath -classpath . CheckJavaVersion > /dev/null`
if [ $? -ne 2 ] ; then
    echo
    if [ "$glilang" = "es" ]; then
	echo "La versión del Ambiente de Ejecución Java (JRE por sus siglas en "
	echo "inglés) que usted tiene instalada es demasiado vieja para ejecutar "
	echo "la Interfaz de la $PROGNAME. Por favor instale "
	echo "una nueva versión del Ambiente de Ejecución Java (versión 1.4 o "
	echo "posterior) y ejecute nuevamente este guión."
    elif [ "$glilang" = "fr" ]; then
	echo "La version de Java Runtime Environment que vous avez installée est"
	echo "trop vielle pour faire fonctionner $PROGNAME."
	echo "Veuillez installer une nouvelle version du JRE (version 1.4 ou plus"
	echo "récente) et redémarrez le script."
    elif [ "$glilang" = "ru" ]; then
	echo "÷ÅÒÓÉÑ Java Runtime Environment, ËÏÔÏÒÕÀ ÷Ù ÕÓÔÁÎÏ×ÉÌÉ, ÏÞÅÎØ ÓÔÁÒÁ,"
	echo "ÞÔÏÂÙ ÕÐÒÁ×ÌÑÔØ ÂÉÂÌÉÏÔÅÞÎÙÍ $PROGNAME. ðÏÖÁÌÕÊÓÔÁ, "
	echo "ÕÓÔÁÎÏ×ÉÔÅ ÎÏ×ÕÀ ×ÅÒÓÉÀ JRE (×ÅÒÓÉÀ 1.4 ÉÌÉ ÂÏÌÅÅ ÎÏ×ÕÀ) É"
	echo "ÐÅÒÅÕÓÔÁÎÏ×ÉÔÅ ÜÔÏÔ ÓËÒÉÐÔ"
    else
	echo "The version of the Java Runtime Environment you have installed is too"
	echo "old to run the $PROGNAME. Please install a new"
	echo "version of the JRE (version 1.4 or newer) and rerun this script."
    fi
    exit 1
fi

## ---- Check that the GLI has been compiled ----
if [ ! -f "classes/org/greenstone/gatherer/GathererProg.class" ] && [ ! -f "GLI.jar" ]; then
    echo
    if [ "$glilang" = "es" ]; then
	echo "Usted necesita compilar la Interfaz de la Biblioteca Digital Greenstone"
	echo "(por medio de makegli.sh) antes de ejecutar este guión."
    elif [ "$glilang" = "fr" ]; then
	echo "Vous devez compiler le Greenstone Interface (en utilisant makegli.sh)"
	echo "avant d'exécuter ce script."
    elif [ "$glilang" = "ru" ]; then
	echo "÷Ù ÄÏÌÖÎÙ ËÏÍÐÉÌÉÒÏ×ÁÔØ ÂÉÂÌÉÏÔÅÞÎÙÊ ÉÎÔÅÒÆÅÊÓ Greenstone"
	echo "(ÉÓÐÏÌØÚÕÑ makegli.sh) ÐÅÒÅÄ ××ÏÄÏÍ ÜÔÏÇÏ ÓËÒÉÐÔÁ"
    else
	echo "You need to compile the Greenstone Librarian Interface (using makegli.sh)"
	echo "before running this script."
    fi
    exit 1
fi

## ---- Finally, run the GLI ----
echo
if [ "$glilang" = "es" ]; then
    echo "Ejecutando la Interfaz de la $PROGNAME..."
elif [ "$glilang" = "fr" ]; then
    echo "Exécution de $PROGNAME..."
elif [ "$glilang" = "ru" ]; then
    echo "ôÅËÕÝÉÊ ÂÉÂÌÉÏÔÅÞÎÙÊ $PROGNAME..."
else
    echo "Running the $PROGNAME..."
fi

# basic_command is the cmd string common to both Greenstone 3 and Greenstone 2 execution
basic_command="$javapath -Xmx128M -classpath classes/:GLI.jar:lib/apache.jar:lib/qfslib.jar org.greenstone.gatherer.GathererProg"
stop_gli=0
while [ "$stop_gli" = "0" ] ; do 
    
# Other arguments you can provide to GLI to work around memory limitations, or debug
# -Xms<number>M    To set minimum memory (by default 32MB)
# -Xmx<number>M    To set maximum memory (by default the nearest 2^n to the total remaining physical memory)
# -verbose:gc      To set garbage collection messages
# -Xincgc          For incremental garbage collection (significantly slows performance)
# -Xprof           Function call profiling
# -Xloggc:<file>   Write garbage collection log
    
    exit_status=0
    if [ "$_version" -eq 2 ]; then
	`$basic_command -gsdl $GSDLHOME -gsdlos $GSDLOS $*`
	exit_status=$?
    elif [ "$_version" -eq 3 ]; then    
	`$basic_command -gsdl $GSDLHOME -gsdlos $GSDLOS -gsdl3 $GSDL3HOME -gsdl3src $GSDL3SRCHOME $*`
	exit_status=$?
    fi
    
    if [ "$exit_status" != "2" ] ; then
	stop_gli=1
    else
	echo
	if [ "$glilang" = "es" ]; then
	    echo "Restarting/Ejecutando la Interfaz de la $PROGNAME..."
	elif [ "$glilang" = "fr" ]; then
	    echo "Restarting/Exécution de $PROGNAME..."
	elif [ "$glilang" = "ru" ]; then
	    echo "Restarting/ôÅËÕÝÉÊ ÂÉÂÌÉÏÔÅÞÎÙÊ $PROGNAME..."
	else
	    echo "Restarting the $PROGNAME..."
	fi
	
    fi
done 

if [ "$glilang" = "es" ]; then
    echo "¡Hecho!"
elif [ "$glilang" = "fr" ]; then
    echo "Terminé!"
elif [ "$glilang" = "ru" ]; then
    echo "÷ÙÐÏÌÎÅÎÏ!"
else
    echo "Done!"
fi