#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url=$(ynh_app_setting_get $app path)
admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)
language=$(ynh_app_setting_get $app language)
db_name=$(ynh_app_setting_get $app db_name)
admin_pwd=$(ynh_app_setting_get $app admin_pwd)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_print_info "Ensuring downward compatibility..."

# If db_name doesn't exist, create it
if [ -z $db_name ]; then
	db_name=$(ynh_sanitize_dbid $app)
	ynh_app_setting_set $app db_name $db_name
fi

# If final_path doesn't exist, create it
if [ -z $final_path ]; then
	final_path=/var/www/$app
	ynh_app_setting_set $app final_path $final_path
fi

# Compatibility with previous version; password was not set
if [ -z "$admin_pwd" ] ; then
  # Generate a new password
  admin_pwd=$(ynh_string_random 24)

  # Compute password hash with the Piwigo function
  cp ../conf/hash_password.php $final_path
  hashed_password=$(cd $final_path ; php hash_password.php $admin_pwd)

  # Update password hash in database
  db_pwd=$(ynh_app_setting_get $app mysqlpwd)
  ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "UPDATE users SET password='$hashed_password' WHERE username='$admin';"
  ynh_app_setting_set $app admin_pwd "$admin_pwd"

  # Remove the temporary hash generation script
  ynh_secure_remove "$final_path/hash_password.php"
fi

# Use path instead of path_url in settings.yml...
if [ -z "$path_url" ]
then
	path_url=$(ynh_app_setting_get $app path_url)
	ynh_app_setting_set $app path $path_url
	ynh_app_setting_delete $app path_url
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_print_info "Backing up the app before upgrading (may take a while)..."

# Backup the current version of the app
ynh_backup_before_upgrade
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

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path $path_url)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_print_info "Upgrading source files..."

# Create tmp directory and fetch app inside
tmpdir="$(ynh_smart_mktemp --min_size=300)"
ynh_setup_source "$tmpdir"

# Fetch needed plugins
mkdir -p $tmpdir/plugins/Ldap_Login
ynh_setup_source "$tmpdir/plugins/Ldap_Login" ldap_plugin
ynh_setup_source "$tmpdir/plugins" log_failed_logins_plugin

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_print_info "Upgrading nginx web server configuration..."

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_print_info "Upgrading dependencies..."

ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info "Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create $app

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_print_info "Upgrading php-fpm configuration..."

# Create a dedicated php-fpm config
ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# COPY FILES TO $FINAL_PATH
#=================================================

# sets extended pattern matching options in the bash shell
shopt -s extglob

datapath=/home/yunohost.app/$app

# Install files and set permissions
cp -a $tmpdir/!(upload|_data|galleries) $final_path

# Backward compatibility:
# If the _data subdirectory wasn't already moved to /home/yunohost.app/$app,
# then move it there
if [ ! -h $final_path/_data ] ; then
  mv $final_path/_data $datapath
  ln -sd $datapath/_data $final_path/_data
fi

# Backward compatibility:
# If the galleries subdirectory wasn't already moved to /home/yunohost.app/$app,
# then move it there
if [ ! -h $final_path/galleries ] ; then
  mv $final_path/galleries $datapath
  ln -sd $datapath/galleries $final_path/galleries
fi

chown -R $app: $final_path
chown -R $app: $datapath
chmod 755 -R $final_path/_data

ynh_secure_remove "$tmpdir"

#=================================================
# UPGRADE APPLICATION WITH CURL
#=================================================
ynh_print_info "Upgrading piwigo with Curl..."

ynh_app_setting_set $app unprotected_uris "/"
# Reload SSOwat config
yunohost app ssowatconf

# Reload Nginx
systemctl reload nginx

if [ "$language" = "fr" ] ; then
  applanguage="fr_FR"
else
  applanguage="en_UK"
fi

# Upgrade piwigo via curl
ynh_local_curl "/upgrade.php?language=$applanguage&now=true" "language=$applanguage" "username=$admin" "password=$admin_pwd"

#=================================================
# CONFIGURE PIWIGO
#=================================================
ynh_print_info "Configuring piwigo..."

# Make a backup of the original config file if modified
ynh_backup_if_checksum_is_different "$final_path/local/config/config.inc.php"

# Change local config
cp ../conf/config.inc.php $final_path/local/config/

# Calculate and store the config file checksum
ynh_store_file_checksum "$final_path/local/config/config.inc.php"

# Make a backup of the original database config file if modified
ynh_backup_if_checksum_is_different "$final_path/local/config/database.inc.php"

# Setup database in local/config/database.inc.php
ynh_replace_string "__DBTOCHANGE__" "$db_name" ../conf/database.inc.php
ynh_replace_string "__USERTOCHANGE__" "$db_name" ../conf/database.inc.php
db_pwd=$(ynh_app_setting_get $app mysqlpwd)
ynh_replace_string "__PASSTOCHANGE__" "$db_pwd" ../conf/database.inc.php

cp ../conf/database.inc.php $final_path/local/config/database.inc.php

# Calculate and store the database config file checksum
ynh_store_file_checksum "$final_path/local/config/database.inc.php"

#=================================================
# ADD LDAP PLUGINS
#=================================================
ynh_print_info "Configuring LDAP plugin..."

# Configure and activate LDAP plugin
ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "UPDATE plugins SET state='active' WHERE id='Ldap_Login';"
cp ../conf/data.dat $final_path/plugins/Ldap_Login

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_print_info "Upgrading fail2ban..."

# Configure and activate log_failed_logins plugin
ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "INSERT INTO plugins (id,state,version) VALUES ('log_failed_logins','active','1.2');" 2>&1 > /dev/null ||ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "UPDATE plugins SET state='active' WHERE id='log_failed_logins';"
ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "INSERT INTO config (param, value) VALUES ('logFailedLoginsFilename','/var/log/${app}FailedLogins.log');" 2>&1 > /dev/null || ynh_mysql_connect_as $db_name $db_pwd $db_name <<< "UPDATE config SET value='/var/log/${app}FailedLogins.log' WHERE param='logFailedLoginsFilename';"

touch "/var/log/${app}FailedLogins.log"
chown $app: "/var/log/${app}FailedLogins.log"

ynh_add_fail2ban_config --logpath="/var/log/${app}FailedLogins.log" --failregex="ip=<HOST>" --max_retry=6

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info "Upgrading SSOwat configuration..."

# Protect URIs if private
if [ $is_public -eq 0 ]
then
  ynh_app_setting_delete $app unprotected_uris
  ynh_app_setting_set $app protected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info "Reloading nginx web server..."

systemctl reload nginx

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

ynh_print_info "Upgrade of $app completed"