#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# 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)

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# 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

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

# Inform the backup/restore process that it should not save the data directory
# Use only for the previous backup script that doesn't set 'is_big'
ynh_app_setting_set $app backup_core_only 1

# Backup the current version of the app
ynh_backup_before_upgrade

# Remove the option backup_core_only after the backup.
ynh_app_setting_delete $app backup_core_only

ynh_clean_setup () {
	# 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
#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CREATE DIRECTORIES
#=================================================

mkdir -p /home/yunohost.transmission/{progress,completed,watched}

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

chown -R debian-transmission:www-data /home/yunohost.transmission/
chown -R debian-transmission: /home/yunohost.transmission/{progress,watched}
chmod -R 764 /home/yunohost.transmission
chmod -R 777 /home/yunohost.transmission/watched

#=================================================
# CONFIGURE TRANSMISSION
#=================================================
ynh_script_progression --message="Reconfiguring Transmission..." --weight=2

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

# Verify the checksum and backup the file if it's different
ynh_backup_if_checksum_is_different --file=/etc/transmission-daemon/settings.json

# Create a RPC password
rpcpassword=$(ynh_string_random)
ynh_app_setting_set --app=$app --key=rpcpassword --value="$rpcpassword"

ynh_replace_string --match_string="__RPC_PASSWORD_TO_CHANGE__" --replace_string="$rpcpassword" --target_file=../conf/settings.json
if [ "$path_url" != "/" ]
then
	ynh_replace_string --match_string="__PATH__" --replace_string="$path_url/" --target_file=../conf/settings.json
else
	ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file=../conf/settings.json
fi
ynh_replace_string --match_string="__PEER_PORT__" --replace_string="$peer_port" --target_file=../conf/settings.json
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file=../conf/settings.json
cp ../conf/settings.json /etc/transmission-daemon/settings.json

if [ -e /proc/sys/net/core/rmem_max ]
then
    # Verify the checksum and backup the file if it's different
    ynh_backup_if_checksum_is_different --file=/etc/sysctl.d/90-transmission.conf

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

#=================================================
# STORE THE CHECKSUM OF THE CONFIG FILE
#=================================================

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum --file=/etc/transmission-daemon/settings.json
if [ -e /proc/sys/net/core/rmem_max ]
then
    ynh_store_file_checksum --file=/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="/home/yunohost.transmission" --dest_dir="share/Torrents"
# And share completed directory
ynh_multimedia_addfolder --source_dir="/home/yunohost.transmission/completed" --dest_dir="share/Torrents"
# Share also watched directory, to allow to use it easily
ynh_multimedia_addfolder --source_dir="/home/yunohost.transmission/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

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add transmission-daemon --description="BitTorrent Client" --log="/var/log/syslog"

#=================================================
# START TRANSMISSION
#=================================================
ynh_script_progression --message="Starting Transmission..." --weight=2

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

#=================================================
# GENERIC FINALISATION
#=================================================
# 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