#!/bin/sh
#
# Overall, this script works quite nicely, but please help to
# make this script more robust!

# Testers: need help to ensure this script remains POSIX compliant.
# Some distros do not use bash as a default shell.

#===============================================================
# This is a modest attempt to migrate a KDE3 profile to Trinity.
# If $HOME/.trinity exists then skip this one-time migration.

# Can this script be run from within starttde?
# Challenge: to run this script from within starttde requires
# graphical dialog boxes. When is the underlying TDE system
# sufficiently operational in the starttde script to use KDialog?
# If KDialog is unavailable then that leaves xmessage, which is
# ugly although possibly adequate.

# If KDialog is unavailable until after $HOME/.trinity exists, such
# as after running KPersonalizer, then this script will not help.
# Also, KPersonalizer automatically creates a skeleton profile directory
# when launched, as does some command line tools such as tdeconf_update.
#
# Additionally, this script was written mainly from a command line
# login perspective. This script and concept needs testing and
# improvements to support graphical login systems.

#===============================================================
# Known Quirks:
# When testing the same user account between two different systems, such
# as a real and virtual machine or two different physical machines,
# after a migration KMix is always muted because the sound devices differ.

# Not sure, but forced window sizes saved in kwinrulesc seem to break after
# a migration.
#===============================================================

Wait_For_Response () {
unset response
# -r Backslash does not act as an escape character.
# -p Display "PROMPT" without a trailing newline, before attempting to read any input.
while true; do
  read -r -p "$1 (y/n): " yn
  case $yn in
    [Yy]* ) response=y; break;;
    [Nn]* ) response=n; break;;
    * ) echo "Please answer yes (y/Y) or no (n/N).";;
  esac
done
}

Proceed_From_Response () {
if [ "$response" = "n" -o "$response" = "N" ]; then
  echo "Exiting."
  echo
  exit 0
else
  echo "Continuing."
  echo
fi
}

# Need help here to make the disk space test more robust!
disk_space_test () {
echo
echo "Testing available disk space."
# Find the remaining space on the partition.
AVAILABLE="`df $HOME/$KDE3_PROFILE | grep '\/' | awk '{print $4}'`"
# Find the size of the profile directory.
PROFILE_SIZE="`du -s $HOME/$KDE3_PROFILE | awk '{print $1}'`"
# Determine remaining partition space after migrating.
REMAINING_SPACE=$(($AVAILABLE - $PROFILE_SIZE))
# Convert to human friendly numbers (MBs).
PROFILE_SIZE=$(( ${PROFILE_SIZE} / 1024 ))
REMAINING_SPACE=$(( $REMAINING_SPACE / 1024 ))
# Let the user know the results.
echo "Remaining disk space: ${REMAINING_SPACE} MB"
echo "Space required for new profile: ${PROFILE_SIZE} MB"
# If obvious insufficient space then inform and quit.
if [ $PROFILE_SIZE -gt $REMAINING_SPACE ]; then
  echo "Insufficient disk space. Exiting."
  echo
  exit 0
else
  echo "Sufficient disk space exists. Continuing."
  echo
fi
# Ask whether to proceed.
# Wait_For_Response "Migrate?"
# Proceed_From_Response
# User wants to migrate.
echo "Migrating an existing KDE3 profile directory:" 1>&2
echo "Copying \$HOME/$KDE3_PROFILE to \$HOME/.trinity." 1>&2
cp -a $HOME/$KDE3_PROFILE $HOME/.trinity
}

# Require a backup of the profile.
if [ "$1" = "backup" ]; then
  BACKUP="true"
fi

# Avoid any possible conflict with KDE4. Therefore within this script
# use full path names to all binaries used.

# The binaries for TDE are located in the same place as this script.
# To determine that location use the following method rather than presuming
# the existence of $TDEDIR. That environment variable might not be
# defined or defined to point to KDE4 binaries.
BIN_DIR="`dirname \`readlink -f $0\``"
if [ -x $BIN_DIR/tde-config ]; then
  TDE_VERSION="`$BIN_DIR/tde-config --version | grep TDE | awk '{print $2}'`"
  echo "Trinity Desktop Environment version is $TDE_VERSION" 1>&2
  export TDEDIR=${BIN_DIR%/bin}
  echo "Trinity Desktop Environment base directory is $TDEDIR" 1>&2
else
  # This might be a Trinity version before kde-config was renamed to tde-config.
  # Don't use kde-config because of a bug that always creates a $TDEHOME directory.
  if [ -x $BIN_DIR/konqueror ]; then
    TDE_VERSION="`$BIN_DIR/konqueror --version | grep KDE | awk '{print $2}'`"
    echo "Trinity Desktop Environment version is $TDE_VERSION" 1>&2
    export TDEDIR=${BIN_DIR%/bin}
    echo "Trinity Desktop Environment base directory is $TDEDIR" 1>&2
  else
    echo "Unable to determine the TDE bin directory, where this script should be installed."
    echo "This script should be installed in the same directory."
    echo "Exiting."
    exit 1
  fi
fi
unset BIN_DIR

# Trap when the user runs this script while in a Trinity session.
# Most files can be updated "live" but some can't, such as kdeglobals.
if [ "$TDE_FULL_SESSION" != "" ] && [ "$TDE_SESSION_UID" != "" ] && [ "`ps ax | grep \`tail -n1 $HOME/.DCOPserver_\`uname -n\`__0 2>/dev/null\` | grep -v grep`" != "" ]; then
  MESSAGE="You are running this script while a Trinity session is active.\nMost files can be updated \"live\" but some cannot, such as kdeglobals.\n\nThis script probably will not complete successfully. :-)"
  # Are we in X? Display an X dialog explaining breakage.
  printf "%b" "$MESSAGE\n"
  Wait_For_Response "Continue?"
  Proceed_From_Response
fi

echo
echo "This script migrates an existing KDE3 profile directory."
echo "The definition of a KDE3 profile directory includes some"
echo "older Trinity profile directories."
echo
echo "The KDE3 profile directory will be copied/duplicated"
echo "and then cleaned/scrubbed to remove remnants of KDE3."
echo "KMail config files will be scrubbed but not the mail files."
echo "Likewise with other data files, such as for Amarok, Basket,"
echo "Juk, KGet, KNotes, and Kopete."
echo "The result is a new Trinity profile directory. :-)"
echo

# We need to make this first test more robust. Some TDE tools create
# a skeleton profile directory ($TDEHOME/share/config) with no files.
# Thus, the mere existence of $HOME/.trinity will cause this script
# to terminate despite an existing profile directory possibly being
# nothing more than a skeleton. Possibly like the KDE4 profile directory
# test below, we can test for several knowable TDE files that also don't
# exist in KDE4. If those files don't exist then presume a skeleton
# profile directory.
# Do not migrate when $TDEHOME is a sym link to another profile directory.
# Trinity should have full reign within its own profile directory
# (limited to administrative locking), but an error check is a
# conservative approach.
TDEHOME_LINK="`readlink \"$HOME/.trinity\"`"
if [ "$TDEHOME_LINK" != "" ]; then
  echo "Warning! The profile directory $HOME/.trinity is a" 1>&2
  echo "sym link to $TDEHOME_LINK!" 1>&2
  echo "Please break this sym link to perform the profile migration." 1>&2
  echo
  Wait_For_Response "Break the sym link now and continue with migrating?"
  Proceed_From_Response
  unlink "$HOME/.trinity" 2>/dev/null
  if [ "`readlink \"$HOME/.trinity\"`" != "" ]; then
    echo "Unable to break the sym link. Check your file and directory privileges. Quitting."
    unset KDE3_PROFILE
    unset TDEHOME_LINK
    exit 0
  fi
fi

if [ -d "$HOME/.trinity" ] && [ "$BACKUP" = "true" ]; then
  echo "$HOME/.trinity already exists." 1>&2
  echo "User requested a backup copy."
  if [ -d $HOME/.trinity.old ]; then
    echo "Creating backup copy $HOME/.trinity.old2..." 1>&2
    cp -a $HOME/.trinity $HOME/.trinity.old2
  else
  echo "Creating backup copy $HOME/.trinity.old..." 1>&2
    cp -a $HOME/.trinity $HOME/.trinity.old
  fi
  echo
  KDE3_PROFILE=".trinity"
elif [ -d "$HOME/.trinity" ]; then
  echo "$HOME/.trinity already exists." 1>&2
  echo "No migration required, but running to update an older Trinity profile." 1>&2
  echo
  KDE3_PROFILE=".trinity"
else
  echo "$HOME/.trinity does not exist." 1>&2
  # If $HOME/.kde3 or $HOME/.kdemod3 exists, probably safe to presume a profile from KDE3 or a previous Trinity.
  if [ -d "$HOME/.kde3" ]; then
    echo "Found $HOME/.kde3."
    KDE3_PROFILE=".kde3"
    disk_space_test
  elif [ -d "$HOME/.kdemod3" ]; then
    echo "Found $HOME/.kdemod3."
    KDE3_PROFILE=".kdemod3"
    disk_space_test
  elif [ -d "$HOME/.kde" ]; then
    # This is tricky --- ensure this profile directory is NOT KDE4.
    echo "Found $HOME/.kde."
    if [ ! -d $HOME/.kde/share/kde4 ] && \
      [ ! -f $HOME/.kde/share/config/nepomukserverrc ] && \
      [ ! -f $HOME/.kde/share/config/phonondevicesrc ] && \
      [ ! -f $HOME/.kde/share/config/plasma-desktop-appletsrc ] && \
      [ ! -f $HOME/.kde/share/config/specialmailcollectionsrc ]; then
      # That was five different tests. Probably not a KDE4 profile. There is a chance
      # the user's KDE3 profile got contaminated testing KDE4. If that is the case then
      # too bad --- the safe route here is not to migrate. Otherwise if this 5-point
      # test passes then migrate the profile.
      KDE3_PROFILE=".kde"
      echo "$HOME/$KDE3_PROFILE does not look like a KDE4 profile directory."
      disk_space_test
    else
        echo "$HOME/.kde probably is a KDE4 profile directory."
    fi
  else
    echo "Found no KDE3 profile directory to migrate." 1>&2
  fi
fi

if [ -n "$KDE3_PROFILE" ] && [ -d "$KDE3_PROFILE" ]; then
  # Remove KDE3 remnants.

  echo "Cleaning temp file locations." 1>&2
  # All three directories are for temporary files. The cache directory is
  # intended for persistent temporary data (is expected to remain across reboots
  # and shutdowns). The other two directories are for non-persistent data and
  # can be deleted across reboots and shutdowns.
  CACHE_DIR="`readlink $HOME/.trinity/cache-\`uname -n\``"
  SOCKET_DIR="`readlink $HOME/.trinity/socket-\`uname -n\``"
  TMP_DIR="`readlink $HOME/.trinity/tmp-\`uname -n\``"
  # Delete the non-persistent temporary directories. This is safe at any time.
  unlink $HOME/.trinity/socket-`uname -n` 2>/dev/null
  unlink $HOME/.trinity/tmp-`uname -n` 2>/dev/null
  if [ "$SOCKET_DIR" != "" ]; then
    rm -fr $SOCKET_DIR 2>/dev/null
  fi
  if [ "$TMP_DIR" != "" ]; then
    rm -fr $TMP_DIR 2>/dev/null
  fi
  # Remove the obsolete ksycoca and tdesycoca files from the cache directory.
  # The KDE3 and Trinity cache directories will be linked to the same location,
  # but deleting the ksycoca/tdesycoca files is non-destructive.
  rm -f $HOME/.trinity/cache-`uname -n`/ksycoca* 2>/dev/null
  rm -f $HOME/.trinity/cache-`uname -n`/tdesycoca* 2>/dev/null

  # Fix config files.
  # Exclude KMail mail files --- we don't want to touch those files.
  # I'm using maildir --- do these commands work for mbox too?
  echo "Cleaning config files (but not files with user data, e.g. KMail mail files. :-))" 1>&2
  echo "Cleaning, first pass..." 1>&2
  KDE3_PROFILE_R=$(echo $KDE3_PROFILE | sed "s|\.|\\\\.|g")
  find $HOME/.trinity \
       -path $HOME/.trinity/share/apps/amarok/albumcovers -prune -o \
       -path $HOME/.trinity/share/apps/basket/baskets -prune -o \
       -path $HOME/.trinity/share/apps/juk/covers -prune -o \
       -path $HOME/.trinity/share/apps/kget/logs -prune -o \
       -path $HOME/.trinity/share/apps/kmail/autosave -prune -o \
       -path $HOME/.trinity/share/apps/kmail/dimap -prune -o \
       -path $HOME/.trinity/share/apps/kmail/imap -prune -o \
       -path $HOME/.trinity/share/apps/kmail/mail -prune -o \
       -path $HOME/.trinity/share/apps/kmail/search -prune -o \
       -path $HOME/.trinity/share/apps/knotes -prune -o \
       -path $HOME/.trinity/share/apps/kopete/logs -prune -o \
       -type f -print0 | \
    xargs -r0 grep -ZIFl "/${KDE3_PROFILE}" | \
    xargs -r0 sed -i "s|/${KDE3_PROFILE_R}|/\.trinity|g"
  EXIT_CODE="$?"
  if [ "$EXIT_CODE" = "0" ]; then
    echo "Done." 1>&2
  else
    echo "There was an error with the first pass." 1>&2
  fi
  # What if $TDEDIR is not defined? Bummer.
  if [ -z "$TDEDIR" ]; then
    echo "The \$TDEDIR environment variable does not exist. Cannot complete the second pass." 1>&2
  else
    echo "Cleaning, second pass..." 1>&2
    find $HOME/.trinity \
         -path $HOME/.trinity/share/apps/amarok/albumcovers -prune -o \
         -path $HOME/.trinity/share/apps/basket/baskets -prune -o \
         -path $HOME/.trinity/share/apps/juk/covers -prune -o \
         -path $HOME/.trinity/share/apps/kget/logs -prune -o \
         -path $HOME/.trinity/share/apps/kmail/autosave -prune -o \
         -path $HOME/.trinity/share/apps/kmail/dimap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/imap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/mail -prune -o \
         -path $HOME/.trinity/share/apps/kmail/search -prune -o \
         -path $HOME/.trinity/share/apps/knotes -prune -o \
         -path $HOME/.trinity/share/apps/kopete/logs -prune -o \
         -type f -print0 | \
      xargs -r0 grep -ZIFl "/opt/kde/" | \
      xargs -r0 sed -i "s|/opt/kde/|${TDEDIR}/|g"
    EXIT_CODE_1="$?"
    find $HOME/.trinity \
         -path $HOME/.trinity/share/apps/amarok/albumcovers -prune -o \
         -path $HOME/.trinity/share/apps/basket/baskets -prune -o \
         -path $HOME/.trinity/share/apps/juk/covers -prune -o \
         -path $HOME/.trinity/share/apps/kget/logs -prune -o \
         -path $HOME/.trinity/share/apps/kmail/autosave -prune -o \
         -path $HOME/.trinity/share/apps/kmail/dimap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/imap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/mail -prune -o \
         -path $HOME/.trinity/share/apps/kmail/search -prune -o \
         -path $HOME/.trinity/share/apps/knotes -prune -o \
         -path $HOME/.trinity/share/apps/kopete/logs -prune -o \
         -type f -print0 | \
      xargs -r0 grep -ZIFl "/opt/kde3/" | \
      xargs -r0 sed -i "s|/opt/kde3/|${TDEDIR}/|g"
    EXIT_CODE_2="$?"
    if [ "$EXIT_CODE_1" = "0" ] && [ "$EXIT_CODE_2" = "0" ]; then
      echo "Done." 1>&2
    else
      echo "There was an error with the second pass." 1>&2
  fi
    echo "Cleaning, third pass..." 1>&2
    # Prevent an anomaly with the kicker Firefox icon. Firefox likely is installed to /usr.
    # The following update will change that to /opt/trinity. We need to restore that location.
    KICKER_FIREFOX="$HOME/$KDE3_PROFILE/share/apps/kicker/mozilla-firefox.desktop"
    if [ -e "$KICKER_FIREFOX" ]; then
      FIREFOX_PNG_LOCATION="`grep \"Icon=\" \"$KICKER_FIREFOX\"`"
    fi
    find $HOME/.trinity \
         -path $HOME/.trinity/share/apps/amarok/albumcovers -prune -o \
         -path $HOME/.trinity/share/apps/basket/baskets -prune -o \
         -path $HOME/.trinity/share/apps/juk/covers -prune -o \
         -path $HOME/.trinity/share/apps/kget/logs -prune -o \
         -path $HOME/.trinity/share/apps/kmail/autosave -prune -o \
         -path $HOME/.trinity/share/apps/kmail/dimap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/imap -prune -o \
         -path $HOME/.trinity/share/apps/kmail/mail -prune -o \
         -path $HOME/.trinity/share/apps/kmail/search -prune -o \
         -path $HOME/.trinity/share/apps/knotes -prune -o \
         -path $HOME/.trinity/share/apps/kopete/logs -prune -o \
         -type f -print0 | \
      xargs -r0 grep -ZIFl "/usr/share/" | \
      xargs -r0 sed -i "s|/usr/share/|${TDEDIR}/share/|g"
    if [ "$?" = "0" ]; then
      if [ "$FIREFOX_PNG_LOCATION" != "" ]; then
        FIREFOX_PNG_LOCATION_NEW="`grep \"Icon=\" \"$HOME/.trinity/share/apps/kicker/mozilla-firefox.desktop\"`"
        FIREFOX_PNG_LOCATION_NEW_R=$(echo $FIREFOX_PNG_LOCATION_NEW | sed "s|\.|\\\\.|g")
        sed -i "s|$FIREFOX_PNG_LOCATION_NEW_R|$FIREFOX_PNG_LOCATION|" $HOME/.trinity/share/apps/kicker/mozilla-firefox.desktop
      fi
      echo "Done." 1>&2
    else
      echo "There was an error with the third pass." 1>&2
    fi
  fi
  # Need to update files in $HOME/.trinity/Autostart.
  # Some files might be *.desktop files and can be cleaned in place.
  # Some files might be sym links to a previous KDE3 location.
  # Recreate those links to the correct Trinity location.
  # This needs improvement for apps not in /usr/bin.
  echo "Attempting to update *.desktop files in Autostart." 1>&2
  find $HOME/.trinity/Autostart -! -type l -type f -print0 | \
    xargs -r0 grep -ZIFl "/usr/bin/" | \
    xargs -r0 sed -i "s|/usr/bin/|${TDEDIR}/bin/|g"
  echo "Attempting to update sym links in Autostart." 1>&2
  ( cd $HOME/.trinity/Autostart
    for i in `find . -type l`; do
      LINK="`readlink $i`"
      echo "Found a sym link to $LINK." 1>&2
      LINK_PATH="`dirname $LINK`"
      LINK_NAME="`basename $LINK`"
      if [ -n "`echo $LINK_PATH | grep \"/usr\"`" ]; then
        echo "Sym link points to /usr." 1>&2
        NEW_LINK_PATH="`echo $LINK_PATH | sed \"s|/usr|${TDEDIR}|\"`"
      elif [ -n "`echo $LINK_PATH | grep \"/opt/kde\"`" ]; then
        echo "Sym link points to /opt/kde." 1>&2
        NEW_LINK_PATH="`echo $LINK_PATH | sed \"s|/opt/kde|${TDEDIR}|\"`"
      elif [ -n "`echo $LINK_PATH | grep \"/opt/kde3\"`" ]; then
        echo "Sym link points to /opt/kde3." 1>&2
        NEW_LINK_PATH="`echo $LINK_PATH | sed \"s|/opt/kde3|${TDEDIR}|\"`"
      elif [ -n "`echo $LINK_PATH | grep \"${TDEDIR}\"`" ]; then
        echo "Sym link points to ${TDEDIR}." 1>&2
      else
        echo "Cannot establish a path for a new link." 1>&2
      fi
      if [ "$NEW_LINK_PATH" != "" ] && [ "$LINK_NAME" != "" ]; then
        unlink $i
        echo "Attempting to create a sym link to $NEW_LINK_PATH/$LINK_NAME." 1>&2
        ln -sf $NEW_LINK_PATH/$LINK_NAME $LINK_NAME
        if [ "$?" = "0" ]; then
          echo "Link created." 1>&2
        else
          echo "There was an error with creating the link." 1>&2
        fi
      else
        echo "Not updating the link."
      fi
    done
    if [ -f kmix.desktop ]; then
      $TDEDIR/bin/kwriteconfig --file kmixrc --key Autostart --type bool "true"
    fi
    rm -f kmix.desktop
  )

  # Ensure all KDED services are accounted for in the user's profile. Any that are missing
  # are defaulted to not auto-loading (false). Refer to bug report 1210. This same test is
  # performed in the r14-xdg-update script, but notice the r14-xdg-update script uses the
  # key of X-TDE-Kded-autoload whereas X-KDE-Kded-autoload is used here.
  if [ -d $HOME/.trinity/share/services/kded ]; then
    if [ "`find $HOME/.trinity/share/services/kded -name *.desktop`" != "" ]; then
      echo "Validating KDED services."
      for i in `/bin/ls -1 $HOME/.trinity/share/services/kded/*.desktop`; do
        SERVICE_NAME=`basename $i`
        if [ ! -f $TDEDIR/share/services/kded/$SERVICE_NAME ]; then
          $TDEDIR/bin/kwriteconfig --file $i --group "Desktop Entry" --key "X-KDE-Kded-autoload" --type bool "false"
        fi
      done
    fi
  fi

  # Preserve kicker/panel icons.
  if [ -r $HOME/.trinity/share/config/kickerrc ]; then
    echo "Updating kicker/panel customizations in kickerrc."
    if [ -r "$HOME/.trinity/share/config/kickerrc" ]; then
      sed -i "s|/usr/share/|${TDEDIR}/share/|g" "$HOME/.trinity/share/config/kickerrc" 2>/dev/null
    else
      echo "kickerrc does not exist."
    fi
  fi

  echo "Renaming some configuration files and directories."
  # Note: The only rebranding that occurred before starting the R14 branch was krita. All other
  # rebranding updates belong in the r14-xdg-update script.
  if [ ! -f $HOME/.trinity/share/config/chalkrc ] && [ -f $HOME/.trinity/share/config/kritarc -o -d $HOME/.trinity/share/apps/krita ]; then
    echo "  krita->chalk"
    mv $HOME/.trinity/share/config/kritarc $HOME/.trinity/share/config/chalkrc 2>/dev/null
    mv $HOME/.trinity/share/apps/krita $HOME/.trinity/share/apps/chalk 2>/dev/null
  fi
  # Note: Don't run tdeconf_update, which is run automatically when starting TDE.
  # Note: Don't run any profile R14 updates: starttde does that through the r14-xdg-update script.
  echo
  echo "Done!" 1>&2
  echo
  echo "If any button icons to non Trinity apps in the kicker/panel"
  echo "or system tray are incorrect, select the correct icon from the"
  echo "button's configure menu option. The button's path to the app should"
  echo "remain correct. (Note: please report any such anomalies.)"
fi
echo

unset KDE3_PROFILE
unset KDE3_PROFILE_R
unset TDEHOME_LINK
unset KICKER_FIREFOX
unset FIREFOX_PNG_LOCATION
unset FIREFOX_PNG_LOCATION_NEW
unset FIREFOX_PNG_LOCATION_NEW_R
unset SERVICE_NAME
unset NEW_LINK_PATH
unset LINK_NAME
unset AVAILABLE
unset PROFILE_SIZE
unset REMAINING_SPACE
unset BIN_DIR
unset TDE_VERSION
unset TDEHOME_LINK
unset CACHE_DIR
unset SOCKET_DIR
unset TMP_DIR
unset EXIT_CODE