#!/system/bin/sh

# Permissions
perm_fake="android.permission.FAKE_PACKAGE_SIGNATURE"
perm_floc="android.permission.ACCESS_FINE_LOCATION"
perm_cloc="android.permission.ACCESS_COARSE_LOCATION"
perm_bloc="android.permission.ACCESS_BACKGROUND_LOCATION"
perm_phon="android.permission.READ_PHONE_STATE"
perm_rext="android.permission.READ_EXTERNAL_STORAGE"
perm_wext="android.permission.WRITE_EXTERNAL_STORAGE"
perm_calr="android.permission.READ_CALENDAR"
perm_calw="android.permission.WRITE_CALENDAR"
perm_conr="android.permission.READ_CONTACTS"
perm_conw="android.permission.WRITE_CONTACTS"
perm_gacc="android.permission.GET_ACCOUNTS"
perm_rsms="android.permission.RECEIVE_SMS"

# Packages
microG="com.google.android.gms"
PlayStore="com.android.vending"
DroidGuard="org.microg.gms.droidguard"
GCalSync="com.google.android.syncadapters.calendar"
GConSync="com.google.android.syncadapters.contacts"
nlpIchnaea="org.microg.nlp.backend.ichnaea"
nlpDejavu="org.fitchfamily.android.dejavu"
nlpApple="org.microg.nlp.backend.apple"
nlpBmap="org.openbmap.unifiedNlp"

# GmsCore userId
gms_uid=$(dumpsys package com.google.android.gms | awk -F= '/userId/{print $2; exit}')

error () {
	echo "!! ${@}"
	exit 1
}

check_package () {
	pm list packages | grep -q "^package:${1}$" && return 0 || return 1
}

check_permission () {
	[[ $(dumpsys package ${1} | grep -Eo "^[ ]+${2}: granted=false") ]] && return 1 || return 0
}

grant_permission () {
	if [ -n "${3}" ]; then
		pm grant --user ${3} ${1} ${2} 2>/dev/null
	else
		pm grant ${1} ${2} 2>/dev/null
	fi
}

permissions () {
	if check_package ${1}; then
		echo "package ${1} found"
		if ! check_permission ${1} ${2}; then
			grant_permission ${1} ${2} ${3} && \
				echo "permission ${2} granted" || \
				echo "failed to grant permission ${2}"
		else	echo "already has permission ${2}"
		fi
	fi
}

get_app_location () {
	pm list packages -f ${1} | sed 's|package:\(.*\)=[^=]*|\1|g'
}

user_install_app () {
	pm install -r ${1}
}

user_install () {
	check_package ${1} || return
	loc=$(get_app_location ${1})
	case ${loc} in
		/data/* ) echo "package ${1} already is user app" ;;
		* )
			user_install_app ${loc} && \
			echo "package ${1} installed as user app" || \
			echo "failed to install package ${1} as user app"
		;;
	esac
}

[[ $(whoami) = "root" ]] || [[ $(whoami) = "shell" ]] || error "not running as either ADB or root"

if [ "$(getprop ro.build.version.sdk)" -ge 29 ]; then
	# microG GmsCore needs to be installed as user app for all permissions to be granted
	# see https://github.com/microg/android_packages_apps_GmsCore/issues/1100#issuecomment-711088518
	user_install ${microG}
fi

# microG DroidGuard Helper needs to be installed as user app to prevent crashes
user_install ${DroidGuard}

# Fake Package Signature
permissions ${microG} ${perm_fake}
permissions ${PlayStore} ${perm_fake}

# Location
for app in ${microG} ${nlpIchnaea} ${nlpDejavu} ${nlpApple} ${nlpBmap}; do
	permissions ${app} ${perm_cloc}
done

for app in ${microG} ${nlpIchnaea} ${nlpDejavu} ${nlpApple}; do
	permissions ${app} ${perm_floc}
done

# Restricted permissions
permissions ${microG} ${perm_bloc} ${gms_uid}
permissions ${microG} ${perm_rsms} ${gms_uid}

# Misc. permissions
permissions ${microG} ${perm_gacc}
permissions ${microG} ${perm_phon}
permissions ${microG} ${perm_rext}
permissions ${microG} ${perm_wext}

# Google Calendar Sync
permissions ${GCalSync} ${perm_calr}
permissions ${GCalSync} ${perm_calw}

# Google Contacts Sync
permissions ${GConSync} ${perm_conr}
permissions ${GConSync} ${perm_conw}
permissions ${GConSync} ${perm_gacc}