installgui

#!/bin/bash
DIRECTORY="$(dirname $0)"
#variable 1 is a space-seperated list of packages

NUM_PKGS=$(echo "$1" | wc -w)
#echo "$NUM_PKGS"
#repeat for each package listed
i=1
while [ $i -le "$NUM_PKGS" ]; do
  REQ_PKG="$(echo $1 | cut -d " " -f $i)"
  #echo "$REQ_PKG"
  
  PKG_OK=$(dpkg-query -W --showformat='${Status}\n' "$REQ_PKG"|grep "install ok installed")
  if [ "" == "$PKG_OK" ]; then
    PKG_LIST="${PKG_LIST} ${REQ_PKG}" #add package to install list
  fi
  #echo $i
  PKG_LIST="$(echo "$PKG_LIST" | sed -e 's/^ //g')"
  i=$((i+1))
done

#list created that only has packages not installed
#remove spaces

echo "To be installed: ${PKG_LIST}"

#if blank or contains only spaces
if [ ! -z "$PKG_LIST" ];then

#has newline chars to display properly
package_list="$(echo "$PKG_LIST" | tr ' ' '\n')"

#If yad exists, use a yad dialog
if [ -f /usr/bin/yad ];then
  echo -e "$package_list" | yad --list --no-click --no-columns --separator='\n' \
	--title='Pi Power Tools' --center --window-icon="${DIRECTORY}/icons/logo-64.png" \
	--text=" These packages are required but not installed.   \n Install them now?" \
	--column=Package \
	--button="No!${DIRECTORY}/icons/exit.png:1" \
	--button="Yes!${DIRECTORY}/icons/check.png:0" \
	--image="${DIRECTORY}/icons/install.png" \
	--print-column=2 --no-selection 2>/dev/null
  button=$?
else #if yad does not exist then fallback to zenity
  echo -e "$package_list" | zenity --title='Pi Power Tools' --window-icon="${DIRECTORY}/icons/logo-64.png" \
  	--list --text=" These packages are required but not installed.   \n Install them now?" \
  	--ok-label=Yes --cancel-label=No \
  	--column=foo --hide-header 2>/dev/null
  button=$?
fi

#echo $button
if [ ! $button -eq 0 ];then
  echo "User declined."
  exit 1
fi

echo $PKG_LIST > "${DIRECTORY}/installedpackages"
"${DIRECTORY}/functions/terminal-run" "sudo apt install -y $PKG_LIST;echo -e '\nInstallation finished.\nClosing in 5 seconds.';sleep 5" "Installing packages..."
if [ ! $? -eq 0 ];then #if apt exits with error
  echo -e "Could not install the packages!\nTry installing them yourself by running this in the terminal:\nsudo apt install $PGK_LIST" | yad --text-info \
  	--width=700 --height=150 --title='Pi Power Tools' --center \
  	--button="OK!${DIRECTORY}/icons/check.png:0" --window-icon="${DIRECTORY}/icons/logo-64.png" 2>/dev/null
  exit 1
fi
sleep 1
#wait until apt process finishes
while ps -C apt,dpkg >/dev/null;do
  sleep 1
done

fi
#all of the above is skipped if there are no new packages to install.