install

#!/bin/bash

function error {
  echo -e "\e[91m$1\e[39m"
  exit 1
}

cd "$HOME"

#ensure non-root
if [[ "$(id -u)" == 0 ]]; then
  error "Pi-Apps is not designed to be installed as root! Please try again as a regular user."
fi

#ensure debian
command -v apt >/dev/null || error "apt: command not found. Most likely this system is not running Debian."

#Ensure running arm processor
if uname -m | grep -qi 'x86\|i686\|i386' ;then
  error "Pi-Apps is not supported on non-ARM CPU architectures. You may be interested in Pi-Apps x86, a unofficial fork of Pi-Apps for x64 and x86 systems: https://github.com/Pi-Apps-Recreates/pi-apps-x86"
fi

sudo apt update || error "The command 'sudo apt update' failed. Before Pi-Apps will work, you must fix your apt package-management system."

#install dependencies
dependencies='yad curl wget aria2 lsb-release apt-utils imagemagick bc librsvg2-bin locales shellcheck git wmctrl xdotool x11-utils rsync'

if ! dpkg -s $dependencies &>/dev/null ;then
  sudo apt install $dependencies -y -f --no-install-recommends
fi
echo

#remove annoying "YAD icon browser" launcher
sudo rm -f /usr/share/applications/yad-icon-browser.desktop

#download pi-apps if folder missing
DIRECTORY="$(readlink -f "$(dirname "$0")")"
if [ -z "$DIRECTORY" ] || [ "$DIRECTORY" == "$HOME" ] || [ "$DIRECTORY" == bash ] || [ ! -f "${DIRECTORY}/api" ] || [ ! -f "${DIRECTORY}/gui" ];then
  DIRECTORY="$HOME/pi-apps"
fi
downloaded=0 #track if pi-apps was downloaded this time

#Re-download pi-apps folder if local git repo is over 1 months out of date
if [ -d "$DIRECTORY" ];then
  #first compare local git repo's last-commit-time with the current system time (Unix epoch time format)
  current_git_date="$(cd "$DIRECTORY"; git show -s --format=%ct)"
  current_local_date="$(date +%s)"
  if [ -z "$current_git_date" ] || [ "$current_local_date" -gt $(($current_git_date + 30*60*60*24)) ];then
    
    #if local git repo's last-commit-time is 3 months older than current system time, now compare the local git repo's last-commit-time with the online repo's modification time to avoid false positives.
    #This two-tiered approach prevents unnecessary GitHub API calls and speeds up script's execution for normal usage.
    
    command -v curl >/dev/null || sudo apt install -y curl
    upstream_git_date="$(curl https://api.github.com/repos/Botspot/pi-apps/commits/master 2>&1 | grep '"date":' | tail -n 1 | sed 's/"date"://g' | xargs date +%s -d 2>/dev/null)"
    
    if [[ "$upstream_git_date" =~ ^[0-9]+$ ]] && ([ -z "$current_git_date" ] || [ "$upstream_git_date" -gt $(($current_git_date + 30*60*60*24)) ]);then
      rm -rf ~/pi-apps-forced-update
      
      echo "Reinstalling Pi-Apps..."
      downloaded=1
      output="$(git clone --depth 1 https://github.com/Botspot/pi-apps ~/pi-apps-forced-update 2>&1)"
      if [ $? != 0 ] || [ ! -d "$DIRECTORY" ];then
        error "Pi-Apps download failed!\ngit clone output was: $output"
      fi
      cp -af "${DIRECTORY}/data" ~/pi-apps-forced-update
      cp -af "${DIRECTORY}/apps" ~/pi-apps-forced-update
      rm -rf "$DIRECTORY"
      mv -f ~/pi-apps-forced-update "$DIRECTORY"
    fi
  fi
  
#if pi-apps folder does not exist, download it
elif [ ! -d "$DIRECTORY" ];then
  echo "Downloading Pi-Apps..."
  downloaded=1
  output="$(git clone --depth 1 https://github.com/Botspot/pi-apps "$DIRECTORY" 2>&1)"
  if [ $? != 0 ] || [ ! -d "$DIRECTORY" ];then
    error "Pi-Apps download failed!\ngit clone output was: $output"
  fi
  #click new installation analytics link
  curl -s -X 'GET' "https://pi-apps-analytics.linkpc.net/pi-apps-install-script/track" -H 'accept: image/gif' -A "Pi-Apps Raspberry Pi app store" >/dev/null &
fi

#Past this point, DIRECTORY variable populated with valid pi-apps directory

#if ChromeOS, install lxterminal
if command -v garcon-terminal-handler >/dev/null ;then
  echo "In order to install apps on ChromeOS, a working terminal emulator is required.
Installing lxterminal in 10 seconds... (press Ctrl+C to cancel)"
  sleep 10
  sudo apt install -yf lxterminal || error "Failed to install lxterminal on ChromeOS!"
fi

#menu button
if [ ! -f ~/.local/share/applications/pi-apps.desktop ];then
  echo "Creating menu button..."
fi
mkdir -p ~/.local/share/applications
echo "[Desktop Entry]
Name=Pi Apps
Comment=Raspberry Pi App Store for open source projects
Exec=${DIRECTORY}/gui
Icon=${DIRECTORY}/icons/logo.png
Terminal=false
Type=Application
Categories=Utility;
StartupNotify=true" > ~/.local/share/applications/pi-apps.desktop

#copy menu button to Desktop
cp -f ~/.local/share/applications/pi-apps.desktop ~/Desktop

#settings menu button
if [ ! -f ~/.local/share/applications/pi-apps-settings.desktop ];then
  echo "Creating Settings menu button..."
fi
echo "[Desktop Entry]
Name=Pi Apps Settings
Comment=Configure Pi-Apps or create an App
Exec=${DIRECTORY}/settings
Icon=${DIRECTORY}/icons/settings.png
Terminal=false
Type=Application
Categories=Settings;
StartupNotify=true" > ~/.local/share/applications/pi-apps-settings.desktop

if [ ! -f ~/.config/autostart/pi-apps-updater.desktop ];then
  echo "Creating autostarted updater..."
fi
mkdir -p ~/.config/autostart
echo "[Desktop Entry]
Name=Pi Apps Updater
Exec=${DIRECTORY}/updater onboot
Icon=${DIRECTORY}/icons/logo.png
Terminal=false
Type=Application
X-GNOME-Autostart-enabled=true
Hidden=false
NoDisplay=false" > ~/.config/autostart/pi-apps-updater.desktop

mkdir -p "${DIRECTORY}/data/status" "${DIRECTORY}/data/update-status" \
  "${DIRECTORY}/data/preload" "${DIRECTORY}/data/settings" \
  "${DIRECTORY}/data/status" "${DIRECTORY}/data/update-status" \
  "${DIRECTORY}/data/categories"

#pi-apps terminal command
if [ ! -f /usr/local/bin/pi-apps ] || ! cat /usr/local/bin/pi-apps | grep -q "${DIRECTORY}/gui" ;then
  echo "#!/bin/bash
${DIRECTORY}/gui"' "$@"' | sudo tee /usr/local/bin/pi-apps >/dev/null
  sudo chmod +x /usr/local/bin/pi-apps
fi

#preload app list
if [ ! -f "$DIRECTORY/data/preload/LIST-" ];then
  echo "Preloading app list..."
fi
"${DIRECTORY}/preload" yad &>/dev/null

#Run runonce entries
"${DIRECTORY}/etc/runonce-entries" &>/dev/null

#Determine message of the day. If announcements file missing or over a day old, download it.
if [ ! -f "${DIRECTORY}/data/announcements" ] || [ ! -z "$(find "${DIRECTORY}/data/announcements" -mtime +1 -print)" ]; then
  wget https://raw.githubusercontent.com/Botspot/pi-apps-announcements/main/message -qO "${DIRECTORY}/data/announcements"
fi

if [ $downloaded == 1 ];then
  echo "Installation complete. Pi-Apps can be launched from the start menu or by running the command 'pi-apps'."
else
  echo -e "Please note that Pi-Apps has NOT been freshly downloaded, because $DIRECTORY already exists."
fi