#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=2

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
port=$(ynh_app_setting_get --app=$app --key=port)
peer_port=$(ynh_app_setting_get --app=$app --key=peer_port)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)
rpcpassword=$(ynh_app_setting_get --app=$app --key=rpcpassword)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=3

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..."

ynh_systemd_action --service_name=transmission-daemon --action="stop"

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=4

if [ -z "$port" ]; then
	port=9091
	ynh_app_setting_set --app=$app --key=port --value=$port
fi

if [ -z "$peer_port" ]; then
	peer_port=51413
	ynh_app_setting_set --app=$app --key=peer_port --value=$peer_port
fi

# Add peer_port also on UDP.
ynh_exec_warn_less yunohost firewall allow UDP $peer_port

# If datadir doesn't exist, create it
if [ -z "$datadir" ]; then
	datadir=/home/yunohost.transmission
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
fi

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=7

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CREATE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating a data directory..."

mkdir -p $datadir/{progress,completed,watched}

chmod -R 764 $datadir
chmod -R 777 $datadir/watched
chown -R debian-transmission:www-data "$datadir"
chown -R debian-transmission: $datadir/{progress,watched}

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=2

# Transmission has to be stopped before modifying its config
ynh_systemd_action --service_name=transmission-daemon --action=stop

if [ "$path_url" != "/" ]
then
	path_less="$path_url/"
else
	path_less="$path_url"
fi

ynh_add_config --template="../conf/settings.json" --destination="/etc/transmission-daemon/settings.json"

chmod 400 "/etc/transmission-daemon/settings.json"
chown debian-transmission:debian-transmission "/etc/transmission-daemon/settings.json"

if [ -e /proc/sys/net/core/rmem_max ]
then
	ynh_add_config --template="../conf/90-transmission.conf" --destination="/etc/sysctl.d/90-transmission.conf"

	chmod 400 "/etc/sysctl.d/90-transmission.conf"
	chown debian-transmission:debian-transmission "/etc/sysctl.d/90-transmission.conf"

	sysctl --load=/etc/sysctl.d/90-transmission.conf
fi

#=================================================
# YUNOHOST MULTIMEDIA INTEGRATION
#=================================================
ynh_script_progression --message="Adding multimedia directories..." --weight=3

ynh_multimedia_build_main_dir
# Set rights on transmission directory (parent need to be readable by other, and progress need to be writable by multimedia. Because files will move)
ynh_multimedia_addfolder --source_dir="$datadir" --dest_dir="share/Torrents"
# And share completed directory
ynh_multimedia_addfolder --source_dir="$datadir/completed" --dest_dir="share/Torrents"
# Share also watched directory, to allow to use it easily
ynh_multimedia_addfolder --source_dir="$datadir/watched" --dest_dir="share/Torrent to download"

#=================================================
# PATCH SOURCE TO ADD A DOWNLOAD BUTTON
#=================================================

cp ../sources/extra_files/app/toolbar-downloads.png /usr/share/transmission/web/style/transmission/images/toolbar-downloads.png
if ! grep --quiet "Inserted by Yunohost install script" /usr/share/transmission/web/style/transmission/common.css
then
	cat ../sources/extra_files/app/ynh_common.css >> /usr/share/transmission/web/style/transmission/common.css
fi
ynh_replace_string "<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div>$" "<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div><div id=\"toolbar-separator\"></div><a href=\"../../downloads/\" id=\"toolbar-downloads\" title=\"Downloads\" target=\"_blank\"></a>" /usr/share/transmission/web/index.html

#=================================================
# GENERIC FINALIZATION
#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add transmission-daemon --description="BitTorrent Client" --log=systemd --needs_exposed_ports="$peer_port"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=2

ynh_systemd_action --service_name=transmission-daemon --action="start"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

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