##########################################################################################
#
# Magisk Module Installer Script
#
##########################################################################################
##########################################################################################
#
# Instructions:
#
# 1. Place your files into system folder (delete the placeholder file)
# 2. Fill in your module's info into module.prop
# 3. Configure and implement callbacks in this file
# 4. If you need boot scripts, add them into common/post-fs-data.sh or common/service.sh
# 5. Add your additional or modified system properties into common/system.prop
#
##########################################################################################

##########################################################################################
# Config Flags
##########################################################################################

# Set to true if you do *NOT* want Magisk to mount
# any files for you. Most modules would NOT want
# to set this flag to true
SKIPMOUNT=false

# Set to true if you need to load system.prop
PROPFILE=false

# Set to true if you need post-fs-data script
POSTFSDATA=false

# Set to true if you need late_start service script
LATESTARTSERVICE=true

##########################################################################################
# Replace list
##########################################################################################

# List all directories you want to directly replace in the system
# Check the documentations for more info why you would need this

# Construct your list in the following format
# This is an example
REPLACE_EXAMPLE="
/system/app/Youtube
/system/priv-app/SystemUI
/system/priv-app/Settings
/system/framework
"

# Construct your own list here
REPLACE="
"

##########################################################################################
#
# Function Callbacks
#
# The following functions will be called by the installation framework.
# You do not have the ability to modify update-binary, the only way you can customize
# installation is through implementing these functions.
#
# When running your callbacks, the installation framework will make sure the Magisk
# internal busybox path is *PREPENDED* to PATH, so all common commands shall exist.
# Also, it will make sure /data, /system, and /vendor is properly mounted.
#
##########################################################################################
##########################################################################################
#
# The installation framework will export some variables and functions.
# You should use these variables and functions for installation.
#
# ! DO NOT use any Magisk internal paths as those are NOT public API.
# ! DO NOT use other functions in util_functions.sh as they are NOT public API.
# ! Non public APIs are not guranteed to maintain compatibility between releases.
#
# Available variables:
#
# MAGISK_VER (string): the version string of current installed Magisk
# MAGISK_VER_CODE (int): the version code of current installed Magisk
# BOOTMODE (bool): true if the module is currently installing in Magisk Manager
# MODPATH (path): the path where your module files should be installed
# TMPDIR (path): a place where you can temporarily store files
# ZIPFILE (path): your module's installation zip
# ARCH (string): the architecture of the device. Value is either arm, arm64, x86, or x64
# IS64BIT (bool): true if $ARCH is either arm64 or x64
# API (int): the API level (Android version) of the device
#
# Availible functions:
#
# ui_print <msg>
#     print <msg> to console
#     Avoid using 'echo' as it will not display in custom recovery's console
#
# abort <msg>
#     print error message <msg> to console and terminate installation
#     Avoid using 'exit' as it will skip the termination cleanup steps
#
# set_perm <target> <owner> <group> <permission> [context]
#     if [context] is empty, it will default to "u:object_r:system_file:s0"
#     this function is a shorthand for the following commands
#       chown owner.group target
#       chmod permission target
#       chcon context target
#
# set_perm_recursive <directory> <owner> <group> <dirpermission> <filepermission> [context]
#     if [context] is empty, it will default to "u:object_r:system_file:s0"
#     for all files in <directory>, it will call:
#       set_perm file owner group filepermission context
#     for all directories in <directory> (including itself), it will call:
#       set_perm dir owner group dirpermission context
#
##########################################################################################
##########################################################################################
# If you need boot scripts, DO NOT use general boot scripts (post-fs-data.d/service.d)
# ONLY use module scripts as it respects the module status (remove/disable) and is
# guaranteed to maintain the same behavior in future Magisk releases.
# Enable boot scripts by setting the flags in the config section above.
##########################################################################################

# Set what you want to display when installing your module

print_modname() {
  ui_print "*******************************"
  ui_print "       V2Ray for Android       "
  ui_print "*******************************"
}

# Copy/extract your module files into $MODPATH in on_install.

on_install() {
  # The following is the default implementation: extract $ZIPFILE/system to $MODPATH
  # Extend/change the logic to whatever you want
  ## ui_print "- Extracting module files"
  ## unzip -o "$ZIPFILE" 'system/*' -d $MODPATH >&2
  # prepare v2ray execute environment
  ui_print "- Prepare V2Ray execute environment."
  mkdir -p /data/v2ray
  mkdir -p /data/v2ray/run
  mkdir -p $MODPATH/scripts
  mkdir -p $MODPATH/system/bin
  mkdir -p $MODPATH/system/etc

  # download latest v2ray core from official link
  ui_print "- Connect official V2Ray download link."
  official_v2ray_link="https://github.com/v2ray/v2ray-core/releases"
  latest_v2ray_version=`curl -s -I "${official_v2ray_link}/latest" | grep Location | grep -o "tag.*" | grep -o "v[0-9.]*"`
  if [ "${latest_v2ray_version}" = "" ] ; then
    ui_print "Error: Connect official V2Ray download link failed." 
    exit 1
  fi
  ui_print "- Download latest V2Ray core ${latest_v2ray_version}-${ARCH}"
  case "${ARCH}" in
    arm)
      download_v2ray_link="${official_v2ray_link}/download/${latest_v2ray_version}/v2ray-linux-arm.zip"
      ;;
    arm64)
      download_v2ray_link="${official_v2ray_link}/download/${latest_v2ray_version}/v2ray-linux-arm64.zip"
      ;;
    x86)
      download_v2ray_link="${official_v2ray_link}/download/${latest_v2ray_version}/v2ray-linux-32.zip"
      ;;
    x64)
      download_v2ray_link="${official_v2ray_link}/download/${latest_v2ray_version}/v2ray-linux-64.zip"
      ;;
  esac
  download_v2ray_zip="/data/v2ray/run/v2ray-core.zip"
  curl "${download_v2ray_link}" -L -o "${download_v2ray_zip}" >&2
  if [ "$?" != "0" ] ; then
    ui_print "Error: Download V2Ray core failed."
    exit 1
  fi
  
  # install v2ray execute file
  ui_print "- Install V2Ray core $ARCH execute files"
  unzip -j -o "${download_v2ray_zip}" "geoip.dat" -d /data/v2ray >&2
  unzip -j -o "${download_v2ray_zip}" "geosite.dat" -d /data/v2ray >&2
  unzip -j -o "${download_v2ray_zip}" "v2ray" -d $MODPATH/system/bin >&2
  unzip -j -o "${download_v2ray_zip}" "v2ctl" -d $MODPATH/system/bin >&2
  unzip -j -o "${ZIPFILE}" 'v2ray/scripts/*' -d $MODPATH/scripts >&2
  unzip -j -o "${ZIPFILE}" "v2ray/bin/$ARCH/v2ray-dns.keeper" -d $MODPATH/scripts >&2
  rm "${download_v2ray_zip}"

  # copy v2ray data and config
  ui_print "- Copy V2Ray config and data files"
  [ -f /data/v2ray/softap.list ] || \
  echo "softap0" > /data/v2ray/softap.list
  [ -f /data/v2ray/resolv.conf ] || \
  unzip -j -o "${ZIPFILE}" "v2ray/etc/resolv.conf" -d /data/v2ray >&2
  unzip -j -o "${ZIPFILE}" "v2ray/etc/config.json.template" -d /data/v2ray >&2
  [ -f /data/v2ray/config.json ] || \
  cp /data/v2ray/config.json.template /data/v2ray/config.json
  ln -s /data/v2ray/resolv.conf $MODPATH/system/etc/resolv.conf
}

# Only some special files require specific permissions
# This function will be called after on_install is done
# The default permissions should be good enough for most cases

set_permissions() {
  inet_uid="3003"
  # The following is the default rule, DO NOT remove
  set_perm_recursive $MODPATH 0 0 0755 0644
  set_perm  $MODPATH/scripts/v2ray.inotify    0  0  0755
  set_perm  $MODPATH/scripts/v2ray.service    0  0  0755
  set_perm  $MODPATH/scripts/v2ray.tproxy     0  0  0755
  set_perm  $MODPATH/scripts/v2ray-dns.handle    0  0  0755
  set_perm  $MODPATH/scripts/v2ray-dns.keeper    0  0  0755
  set_perm  $MODPATH/scripts/v2ray-dns.service   0  0  0755
  set_perm  $MODPATH/system/bin/v2ray  ${inet_uid}  ${inet_uid}  0755
  set_perm  $MODPATH/system/bin/v2ctl  ${inet_uid}  ${inet_uid}  0755
  set_perm  /data/v2ray                ${inet_uid}  ${inet_uid}  0755

  # Here are some examples:
  # set_perm_recursive  $MODPATH/system/lib       0     0       0755      0644
  # set_perm  $MODPATH/system/bin/app_process32   0     2000    0755      u:object_r:zygote_exec:s0
  # set_perm  $MODPATH/system/bin/dex2oat         0     2000    0755      u:object_r:dex2oat_exec:s0
  # set_perm  $MODPATH/system/lib/libart.so       0     0       0644
}

# You can add more functions to assist your custom script code