#!/bin/bash

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

source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info "Loading settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url=$(ynh_app_setting_get $app path)
final_path=$(ynh_app_setting_get $app final_path)
db_name=$(ynh_app_setting_get $app db_name)
with_mysql=$(ynh_app_setting_get $app with_mysql)
password=$(ynh_app_setting_get $app password)
user=$(ynh_app_setting_get $app user)

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_print_info "Validating restoration parameters..."

ynh_webpath_available $domain $path_url \
	|| ynh_die "Path not available: ${domain}${path_url}"
test ! -d $final_path \
	|| ynh_die "There is already a directory: $final_path "

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# RESTORE THE NGINX CONFIGURATION
#=================================================

ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# RESTORE THE APP MAIN DIR
#=================================================
ynh_print_info "Restoring the app main directory..."

ynh_restore_file "$final_path"

#=================================================
# RESTORE THE MYSQL DATABASE
#=================================================

if [ $with_mysql -eq 1 ]; then
    ynh_print_info "Restoring the mysql database..."
    db_pwd=$(ynh_app_setting_get $app mysqlpwd)
    ynh_mysql_setup_db $db_name $db_name $db_pwd
    ynh_mysql_connect_as $db_name $db_pwd $db_name < ./db.sql
fi

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_print_info "Recreating the dedicated system user..."

# Create a standard user (not a system user for sftp)
ynh_system_user_exists "$user" || \
    useradd -d "$final_path" -M --user-group "$user"
# Add the password to this user
chpasswd <<< "${user}:${password}"

#=================================================
# RESTORE USER RIGHTS
#=================================================

# Restore permissions on app files
chown -R $user: "$final_path"
# Home directory of the user need to be owned by root to allow
# SFTP connections
chown root: "$final_path"

#=================================================
# RESTORE THE PHP-FPM CONFIGURATION
#=================================================

ynh_restore_file "/etc/php/7.0/fpm/pool.d/$app.conf"

#=================================================
# SPECIFIC RESTORATION
#=================================================
# CONFIGURE SSH
#=================================================
ynh_print_info "Configuring ssh..."

# Harden SSH connection for the user
echo "##-> ${app}
# Hardening user connection
Match User ${user}
  ChrootDirectory %h
  ForceCommand internal-sftp
  AllowTcpForwarding no
  PermitTunnel no
  X11Forwarding no
##<- ${app}" | tee -a /etc/ssh/sshd_config >/dev/null

systemctl reload ssh

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX AND PHP-FPM
#=================================================
ynh_print_info "Reloading nginx web server and php-fpm..."

systemctl reload php7.0-fpm
systemctl reload nginx

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

ynh_print_info "Restoration completed for $app"