#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# If overwrite_settings doesn't exist, create it
if [ -z "${overwrite_settings:-}" ]; then
	overwrite_settings=1
	ynh_app_setting_set --app=$app --key=overwrite_settings --value=$overwrite_settings
fi

# If root_container doesn't exist, create it
if [ -z "${root_container:-}" ]; then
	root_container="B"
	ynh_app_setting_set --app=$app --key=root_container --value=$root_container
fi

# If friendly_name doesn't exist, create it
if [ -z "${friendly_name:-}" ]; then
	friendly_name="YunoHost DLNA"
	ynh_app_setting_set --app=$app --key=friendly_name --value=$friendly_name
fi

# If version exists, remove the backport source list, as it's no longer used.
if [ -n "${version:-}" ]; then
	ynh_secure_remove --file="/etc/apt/sources.list.d/minidlna.list"
	ynh_app_setting_delete --app=$app --key=version
fi

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPGRADE THE YUNOHOST.MULTIMEDIA DIRECTORY
#=================================================
ynh_script_progression --message="Upgrading the yunohost.multimedia directory..." --weight=3

ynh_multimedia_build_main_dir

#=================================================
# INCREASE INOTIFY'S LIMITS
#=================================================
ynh_script_progression --message="Increasing inotify's limits..." --weight=2

# Increase the maximum number of files inotify can monitor.
cp -a ../conf/90-inotify_minidlna.conf /etc/sysctl.d/
# Then, reload the kernel configuration.
if ! IS_PACKAGE_CHECK   # LXC doesn't allow sysctl to play with kernel options.
then
	sysctl -p /etc/sysctl.d/90-inotify_minidlna.conf
fi

#=================================================
# CONFIGURE MINIDLNA
#=================================================
ynh_script_progression --message="Reconfiguring MiniDLNA..." --weight=2

# Overwrite the settings config file only if it's allowed
if [ $overwrite_settings -eq 1 ]
then
	# Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
	ynh_backup_if_checksum_is_different --file="/etc/minidlna.conf"

	ynh_replace_string --match_string="^#*media_dir=.*" --replace_string="media_dir=/home/yunohost.multimedia/share" --target_file=/etc/minidlna.conf
	ynh_replace_string --match_string="^#*port=.*" --replace_string="port=$port" --target_file=/etc/minidlna.conf
	ynh_replace_string --match_string="^#*friendly_name=.*" --replace_string="friendly_name=$friendly_name" --target_file=/etc/minidlna.conf
	ynh_replace_string --match_string="^#*root_container=.*" --replace_string="root_container=$root_container" --target_file=/etc/minidlna.conf
	ynh_replace_string --match_string="^#wide_links=.*" --replace_string="wide_links=yes" --target_file=/etc/minidlna.conf

	# Calculate and store the config file checksum into the app settings
	ynh_store_file_checksum --file="/etc/minidlna.conf"
fi

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --log="/var/log/$app.log" --needs_exposed_ports="1900"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=7

ynh_systemd_action --service_name=$app --action="restart" --log_path="/var/log/$app.log"

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --last