#!/sbin/sh
# ADDOND_VERSION=2
########################################################
#
# Magisk Survival Script for ROMs with addon.d support
# by topjohnwu and osm0sis
#
########################################################

trampoline() {
  mount /data 2>/dev/null
  if [ -f /data/adb/magisk/addon.d.sh ]; then
    exec sh /data/adb/magisk/addon.d.sh "$@"
  else
    OUTFD=$(ps | grep -v 'grep' | grep -oE 'update(.*)' | cut -d" " -f3)
    [ "$OUTFD" -eq "$OUTFD" ] 2>/dev/null || OUTFD=$(ps -Af | grep -v 'grep' | grep -oE 'update(.*)' | cut -d" " -f3)
    [ "$OUTFD" -eq "$OUTFD" ] 2>/dev/null || OUTFD=$(ps | grep -v 'grep' | grep -oE 'status_fd=(.*)' | cut -d= -f2)
    [ "$OUTFD" -eq "$OUTFD" ] 2>/dev/null || OUTFD=$(ps -Af | grep -v 'grep' | grep -oE 'status_fd=(.*)' | cut -d= -f2)
    ui_print() { echo -e "ui_print $1\nui_print" >> /proc/self/fd/$OUTFD; }

    ui_print "************************"
    ui_print "* Magisk addon.d failed"
    ui_print "************************"
    ui_print "! Cannot find Magisk binaries - was data wiped or not decrypted?"
    ui_print "! Reflash OTA from decrypted recovery or reflash Magisk"
    exit 1
  fi
}

# Always use the script in /data
[ "$0" = /data/adb/magisk/addon.d.sh ] || trampoline

V1_FUNCS=/tmp/backuptool.functions
V2_FUNCS=/postinstall/system/bin/backuptool_ab.functions

if [ -f $V1_FUNCS ]; then
  . $V1_FUNCS
  backuptool_ab=false
elif [ -f $V2_FUNCS ]; then
  . $V2_FUNCS
else
  return 1
fi

initialize() {
  MAGISKBIN=/data/adb/magisk

  if [ ! -d $MAGISKBIN ]; then
    echo "! Cannot find Magisk binaries!"
    exit 1
  fi

  # Load utility functions
  . $MAGISKBIN/util_functions.sh

  if $BOOTMODE; then
    # Override ui_print when booted
    ui_print() { log -t Magisk -- "$1"; }
  else
    OUTFD=
    setup_flashable
  fi
}

main() {
  if ! $backuptool_ab; then
    # Wait for post addon.d-v1 processes to finish
    sleep 5
  fi

  # Ensure we aren't in /tmp/addon.d anymore (since it's been deleted by addon.d)
  cd $TMPDIR

  $BOOTMODE || recovery_actions

  ui_print "************************"
  ui_print "* Magisk v$MAGISK_VER addon.d"
  ui_print "************************"

  mount_partitions
  check_data
  get_flags

  if $backuptool_ab; then
    # Swap the slot for addon.d-v2
    if [ ! -z $SLOT ]; then [ $SLOT = _a ] && SLOT=_b || SLOT=_a; fi
  fi

  find_boot_image

  [ -z $BOOTIMAGE ] && abort "! Unable to detect target image"
  ui_print "- Target image: $BOOTIMAGE"

  remove_system_su
  find_manager_apk
  install_magisk

  # Cleanups
  $BOOTMODE || recovery_cleanup
  rm -rf $TMPDIR

  ui_print "- Done"
  exit 0
}

case "$1" in
  backup)
    # Stub
  ;;
  restore)
    # Stub
  ;;
  pre-backup)
    # Stub
  ;;
  post-backup)
    # Stub
  ;;
  pre-restore)
    # Stub
  ;;
  post-restore)
    initialize
    if $backuptool_ab; then
      $BOOTMODE && su=su || su=sh
      exec $su -c "sh $0 addond-v2"
    else
      # Run in background, hack for addon.d-v1
      (main) &
    fi
  ;;
  addond-v2)
    initialize
    main
  ;;
esac