#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE FAILURE OF THE SCRIPT
#=================================================

ynh_clean_setup () {
# Nettoyage des résidus d'installation non pris en charge par le script remove.
# Pas de nettoyage supplémentaire nécessaire ici...
	echo ""
}
ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

upgrade_level=$YNH_APP_ARG_UPGRADE_LEVEL
ynh_update=$YNH_APP_ARG_YNH_UPDATE
previous_apticron=$YNH_APP_ARG_PREVIOUS_APTICRON
after_apticron=$YNH_APP_ARG_AFTER_APTICRON
unattended_mail=$YNH_APP_ARG_UNATTENDED_MAIL
unattended_verbosity=$YNH_APP_ARG_UNATTENDED_VERBOSITY

app=$YNH_APP_INSTANCE_NAME

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================

ynh_app_setting_set $app upgrade_level $upgrade_level
ynh_app_setting_set $app ynh_update $ynh_update
ynh_app_setting_set $app previous_apticron $previous_apticron
ynh_app_setting_set $app after_apticron $after_apticron
ynh_app_setting_set $app unattended_mail $unattended_mail
ynh_app_setting_set $app unattended_verbosity $unattended_verbosity

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================

ynh_install_app_dependencies apticron unattended-upgrades apt-listchanges

#=================================================
# SPECIFIC SETUP
#=================================================
# CONFIGURE APTICRON
#=================================================

apticron_config="/etc/apticron/apticron.conf"
ynh_replace_string "# NOTIFY_NO_UPDATES=" "&\nNOTIFY_NO_UPDATES=1" "$apticron_config"
ynh_replace_string "# CUSTOM_SUBJECT=" \
	"&\nCUSTOM_SUBJECT=\'[apticron] \$SYSTEM: \$NUM_PACKAGES package update(s)\'" "$apticron_config"
ynh_replace_string "# CUSTOM_NO_UPDATES_SUBJECT=" \
	"&\nCUSTOM_NO_UPDATES_SUBJECT=\'[apticron] \$SYSTEM: Up to date \\o/\'" "$apticron_config"

#=================================================
# CONFIGURE UNATTENDED-UPGRADES
#=================================================

unattended_upgrades_config="/etc/apt/apt.conf.d/50unattended-upgrades"
distro_codename=$(lsb_release -cs)

# Configure upgrade sources
# Allow security update
ynh_replace_string "//\(.*\"o=Debian,n=$distro_codename,l=Debian-Security\";\)" "\1" "$unattended_upgrades_config"
# Allow other updates
if [ "$upgrade_level" = "Security and updates" ]
then
	ynh_replace_string "//\(.*\"o=Debian,n=$distro_codename\";\)" "\1" "$unattended_upgrades_config"
	ynh_replace_string "//\(.*\"o=Debian,n=$distro_codename-updates\";\)" "\1" "$unattended_upgrades_config"
fi

# Add YunoHost upgrade source
if [ $ynh_update -eq 1 ]
then
	ynh_replace_string "origin=Debian,codename=\${distro_codename},label=Debian-Security;" \
		"&\n        //YunoHost upgrade\n        \"o=YunoHost,a=\$distro_codename\";" "$unattended_upgrades_config"
fi

# Allow MinimalSteps upgrading to reduce risk in case of reboot
ynh_replace_string "//\(Unattended-Upgrade::MinimalSteps\)" "\1 \"true\";" "$unattended_upgrades_config"

# Configure Unattended Upgrades mailing
if [ "$unattended_mail" = "If an upgrade has been done" ]
then
	# Allow mail to root
	ynh_replace_string "//\(Unattended-Upgrade::Mail\)" "\1" "$unattended_upgrades_config"

	# Send mail even if there's no errors
	ynh_replace_string "//\(Unattended-Upgrade::MailOnlyOnError\)" "\1 \"false\";" "$unattended_upgrades_config"

elif [ "$unattended_mail" = "Only if there was an error" ]
then
	# Allow mail to root
	ynh_replace_string "//\(Unattended-Upgrade::Mail\)" "\1" "$unattended_upgrades_config"

	# Send mail only if there's an error
	ynh_replace_string "//\(Unattended-Upgrade::MailOnlyOnError\)" "\1 \"true\";" "$unattended_upgrades_config"

else	# "Never"
	# Comment "Unattended-Upgrade::Mail" if isn't already commented
	ynh_replace_string "^\(Unattended-Upgrade::Mail\)" "//\1" "$unattended_upgrades_config"
fi

#=================================================
# CONFIGURE APT PERIODIC FOR UNATTENDED
#=================================================

cp "../conf/02periodic" "/etc/apt/apt.conf.d/02periodic"
ynh_replace_string "__VERBOSITY__" "$unattended_verbosity" "/etc/apt/apt.conf.d/02periodic"
# This config file is used by /etc/cron.daily/apt

ynh_store_file_checksum "/etc/apt/apt.conf.d/02periodic"

#=================================================
# REMOVE ORIGINAL APTICRON CRON FILE
#=================================================

ynh_secure_remove "/etc/cron.d/apticron"

#=================================================
# ADD THE CRON FILE
#=================================================

# Here the cron file to use apticron, unattended-upgrades, then apticron again.
# With a log for unattended-upgrades in /var/log/unattended-upgrades

#=================================================
# GENERIC FINALISATION
#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

# Les fichiers appartiennent à root
chown -R root: $final_path

#=================================================
# SEND A README FOR THE ADMIN
#=================================================

message="If you facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/modele_ynh"

ynh_send_readme_to_admin "$message" "$admin root"