#!/bin/bash
#
# WebHTTrack launcher script
# Initializes the htsserver GUI frontend and launch the default browser

BROWSEREXE=
SRCHBROWSEREXE="x-www-browser www-browser iceape mozilla firefox icecat iceweasel abrowser firebird galeon konqueror opera google-chrome chrome chromium chromium-browser netscape"
if test -n "${BROWSER}"; then
# sensible-browser will f up if BROWSER is not set
SRCHBROWSEREXE="xdg-open sensible-browser ${SRCHBROWSEREXE}"
fi
# Patch for Darwin/Mac by Ross Williams
if test "`uname -s`" == "Darwin"; then
# Darwin/Mac OS X uses a system 'open' command to find
# the default browser. The -W flag causes it to wait for
# the browser to exit
BROWSEREXE="/usr/bin/open -W"
fi
BINWD=`dirname "$0"`
SRCHPATH="$BINWD /usr/local/bin /usr/share/bin /usr/bin /usr/lib/httrack /usr/local/lib/httrack /usr/local/share/httrack /opt/local/bin /sw/bin ${HOME}/usr/bin ${HOME}/bin"
SRCHPATH="$SRCHPATH "`echo $PATH | tr ":" " "`
SRCHDISTPATH="$BINWD/../share $BINWD/.. /usr/share /usr/local /usr /local /usr/local/share ${HOME}/usr ${HOME}/usr/share /opt/local/share /sw ${HOME}/usr/local ${HOME}/usr/share"

###
# And now some famous cuisine

function log {
echo "$0($$): $@" >&2
return 0
}

function launch_browser {
log "launching $1"
browser=$1
url=$2
log "spawning browser.."
${browser} "${url}"
# note: browser can hiddenly use the -remote feature of
# mozilla and therefore return immediately
log "browser (or helper) exited"
}

# First ensure that we can launch the server
BINPATH=
for i in ${SRCHPATH}; do
	! test -n "${BINPATH}" && test -x ${i}/htsserver && BINPATH=${i}
done
for i in ${SRCHDISTPATH}; do
	! test -n "${DISTPATH}" && test -f "${i}/httrack/lang.def" && DISTPATH="${i}/httrack"
done
test -n "${BINPATH}" || ! log "could not find htsserver" || exit 1
test -n "${DISTPATH}" || ! log "could not find httrack directory" || exit 1
test -f ${DISTPATH}/lang.def || ! log "could not find ${DISTPATH}/lang.def" || exit 1
test -f ${DISTPATH}/lang.indexes || ! log "could not find ${DISTPATH}/lang.indexes" || exit 1
test -d ${DISTPATH}/lang || ! log "could not find ${DISTPATH}/lang" || exit 1
test -d ${DISTPATH}/html || ! log "could not find ${DISTPATH}/html" || exit 1

# Locale
HTSLANG="${LC_MESSAGES}"
! test -n "${HTSLANG}" && HTSLANG="${LC_ALL}"
! test -n "${HTSLANG}" && HTSLANG="${LANG}"
HTSLANG="`echo $LANG | cut -f1 -d'.' | cut -f1 -d'_'`"
LANGN=`grep -E "^${HTSLANG}:" ${DISTPATH}/lang.indexes | cut -f2 -d':'`
! test -n "${LANGN}" && LANGN=1

# Find the browser
# note: not all systems have sensible-browser or www-browser alternative
# thefeore, we have to find a bit more if sensible-browser could not be found

for i in ${SRCHBROWSEREXE}; do
for j in ${SRCHPATH}; do
if test -x ${j}/${i}; then
BROWSEREXE=${j}/${i}
fi
test -n "$BROWSEREXE" && break
done
test -n "$BROWSEREXE" && break
done
test -n "$BROWSEREXE" || ! log "cound not find any suitable browser" || exit 1

# "browse" command
if test "$1" = "browse"; then
if test -f "${HOME}/.httrack.ini"; then
INDEXF=`cat ${HOME}/.httrack.ini | tr '\r' '\n' | grep -E "^path=" | cut -f2- -d'='`
if test -n "${INDEXF}" -a -d "${INDEXF}" -a -f "${INDEXF}/index.html"; then
INDEXF="${INDEXF}/index.html"
else
INDEXF=""
fi
fi
if ! test -n "$INDEXF"; then 
INDEXF="${HOME}/websites/index.html"
fi
launch_browser "${BROWSEREXE}" "file://${INDEXF}"
exit $?
fi

# Create a temporary filename
TMPSRVFILE="$(mktemp ${TMPDIR:-/tmp}/.webhttrack.XXXXXXXX)" || ! log "cound not create the temporary file ${TMPSRVFILE}" || exit 1
# Launch htsserver binary and setup the server
(${BINPATH}/htsserver "${DISTPATH}/" --ppid "$$" path "${HOME}/websites" lang "${LANGN}" $@; echo SRVURL=error) > ${TMPSRVFILE}&
# Find the generated SRVURL
SRVURL=
MAXCOUNT=60
while ! test -n "$SRVURL"; do
MAXCOUNT=$[$MAXCOUNT - 1]
test $MAXCOUNT -gt 0 || exit 1
test $MAXCOUNT -lt 50 && echo "waiting for server to reply.."
SRVURL=`grep -E URL= ${TMPSRVFILE} | cut -f2- -d=`
test ! "$SRVURL" = "error" || ! log "could not spawn htsserver" || exit 1
test -n "$SRVURL" || sleep 1
done

# Cleanup function
function cleanup {
test -n "$1" && log "nasty signal caught, cleaning up.."
# Do not kill if browser exited (chrome bug issue) ; server will die itself
test -n "$1" && test -f ${TMPSRVFILE} && SRVPID=`grep -E PID= ${TMPSRVFILE} | cut -f2- -d=`
test -n "${SRVPID}" && kill -9 ${SRVPID}
test -f ${TMPSRVFILE} && rm ${TMPSRVFILE}
test -n "$1" && log "..done"
return 0
}

# Cleanup in case of emergency
trap "cleanup now; exit" 1 2 3 4 5 6 7 8 9 11 13 14 15 16 19 24 25

# Got SRVURL, launch browser
launch_browser "${BROWSEREXE}" "${SRVURL}"

# That's all, folks!
trap "" 1 2 3 4 5 6 7 8 9 11 13 14 15 16 19 24 25
cleanup
exit 0