#!/system/bin/sh

# Permissions
perm_fake="android.permission.FAKE_PACKAGE_SIGNATURE"
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"

# Packages
microG="com.google.android.gms"
PlayStore="com.android.vending"
GCalSync="com.google.android.syncadapters.calendar"
GConSync="com.google.android.syncadapters.contacts"

check_package () {
	[[ $(grep "^${1} " /data/system/packages.list) ]] && return 0 || return 1
}

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

grant_permission () {
	pm grant ${1} ${2} 2>/dev/null
}

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

[[ $(whoami) != "root" ]] && error "not running as root"

# microG and Play Store
permissions ${microG} ${perm_fake}
permissions ${PlayStore} ${perm_fake}

# 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}