post_install() {
    gtk-update-icon-cache -q -t -f usr/share/icons/hicolor
        
    # Add icons to the system icons
    XDG_ICON_RESOURCE="`which xdg-icon-resource 2> /dev/null || true`"
    if [ ! -x "$XDG_ICON_RESOURCE" ]; then
      echo "Error: Could not find xdg-icon-resource" >&2
      exit 1
    fi
    for icon in "/opt/slimjet/product_logo_"*.png; do
      size="${icon##*/product_logo_}"
      "$XDG_ICON_RESOURCE" install --size "${size%.png}" "$icon" "flashpeak-slimjet"
    done
    
    UPDATE_MENUS="`which update-mime-database usr/share/mime &> /dev/null 2> /dev/null || true`"
    if [ -x "$UPDATE_MENUS" ]; then
      update-mime-database usr/share/mime &> /dev/null
    fi
    
    # Update cache of .desktop file MIME types. Non-fatal since it's just a cache.
    update-desktop-database > /dev/null 2>&1 || true
    
    # Updates defaults.list file if present.
    update_defaults_list() {
      # $1: name of the .desktop file
    
      #local DEFAULTS_FILE="/usr/share/applications/defaults.list"
      DEFAULTS_FILE="/usr/share/applications/defaults.list"
    
      if [ ! -f "${DEFAULTS_FILE}" ]; then
    return
      fi
    
      # Split key-value pair out of MimeType= line from the .desktop file,
      # then split semicolon-separated list of mime types (they should not contain
      # spaces).
      mime_types="$(grep MimeType= /usr/share/applications/${1} |
            cut -d '=' -f 2- |
            tr ';' ' ')"
      for mime_type in ${mime_types}; do
    if egrep -q "^${mime_type}=" "${DEFAULTS_FILE}"; then
      if ! egrep -q "^${mime_type}=.*${1}" "${DEFAULTS_FILE}"; then
        default_apps="$(grep ${mime_type}= "${DEFAULTS_FILE}" |
                cut -d '=' -f 2-)"
        egrep -v "^${mime_type}=" "${DEFAULTS_FILE}" > "${DEFAULTS_FILE}.new"
        echo "${mime_type}=${default_apps};${1}" >> "${DEFAULTS_FILE}.new"
        mv "${DEFAULTS_FILE}.new" "${DEFAULTS_FILE}"
      fi
    else
      # If there's no mention of the mime type in the file, add it.
      echo "${mime_type}=${1};" >> "${DEFAULTS_FILE}"
    fi
      done
    }
    
    update_defaults_list "slimjet.desktop"
    
    # This function uses sed to insert the contents of one file into another file,
    # after the first line matching a given regular expression. If there is no
    # matching line, then the file is unchanged.
    insert_after_first_match() {
      # $1: file to update
      # $2: regular expression
      # $3: file to insert
      sed -i -e "1,/$2/ {
    /$2/ r $3
    }" "$1"
    }
    
    # If /usr/share/gnome-control-center/gnome-default-applications.xml exists, it
    # may need to be updated to add ourselves to the default applications list. If
    # we find the file and it does not seem to contain our patch already (the patch
    # is safe to leave even after uninstall), update it.
    GNOME_DFL_APPS=/usr/share/gnome-control-center/gnome-default-applications.xml
    if [ -f "$GNOME_DFL_APPS" ]; then
    # Conditionally insert the contents of the file "default-app-block" after the
    # first "<web-browsers>" line we find in gnome-default-applications.xml
      fgrep -q "FlashPeak Slimjet" "$GNOME_DFL_APPS" || insert_after_first_match     "$GNOME_DFL_APPS"     "^[ 	]*<web-browsers>[ 	]*$"     "/opt/slimjet/default-app-block"
    fi

    update-desktop-database -q
    echo "You must run Slimjet from a terminal the first time!"
}

post_upgrade() {
    post_install
}

pre_remove() {
    
    
    # Remove icons from the system icons
    XDG_ICON_RESOURCE="`which xdg-icon-resource 2> /dev/null || true`"
    if [ ! -x "$XDG_ICON_RESOURCE" ]; then
      echo "Error: Could not find xdg-icon-resource" >&2
      exit 1
    fi
    for icon in "/opt/slimjet/product_logo_"*.png; do
      size="${icon##*/product_logo_}"
      "$XDG_ICON_RESOURCE" uninstall --size "${size%.png}" "flashpeak-slimjet"
    done
    
    UPDATE_MENUS="`which update-mime-database usr/share/mime &> /dev/null 2> /dev/null || true`"
    if [ -x "$UPDATE_MENUS" ]; then
      update-mime-database usr/share/mime &> /dev/null
    fi
    
    # Update cache of .desktop file MIME types. Non-fatal since it's just a cache.
    update-desktop-database > /dev/null 2>&1 || true
    
}

post_remove() {
    gtk-update-icon-cache -q -t -f usr/share/icons/hicolor
    update-desktop-database -q
}