#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
password=$(ynh_app_setting_get --app=$app --key=password)
master_key=$(ynh_app_setting_get --app=$app --key=master_key)

#=================================================
# 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=4

# 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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..."

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

is_public=$(ynh_app_setting_get --app=$app --key=is_public)

if [ -n "$is_public" ]; then
	ynh_app_setting_delete --app=$app --key=protected_uris

	# Removing skipped/unprotected_uris under certain conditions, remove the visitors group added during the migration process of 3.7
	# Remove unprotected_uris. If the app was public, add visitors again to the main permission
	if ynh_permission_has_user --permission=main --user=visitors
	then
		ynh_app_setting_delete --app=$app --key=unprotected_uris
		ynh_permission_update --permission "main" --add "visitors"
	else
		ynh_app_setting_delete --app=$app --key=unprotected_uris
	fi
	ynh_app_setting_delete --app=$app --key=is_public
fi

if ! ynh_permission_exists --permission="admin"; then
	# Create the required permissions
	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	# Download, check integrity, uncompress and patch the source from app.src
	# In case of a new version, the url change from http://download.dotclear.org/latest/dotclear-X.X.X.tar.gz to http://download.dotclear.org/attic/dotclear-X.X.X.tar.gz
	src_url=$(grep 'SOURCE_URL=' "../conf/app.src" | cut -d= -f2-)
	if ! curl --output /dev/null --silent --head --fail "$src_url"; then
		ynh_replace_string "latest" "attic" ../conf/app.src
	fi
	ynh_script_progression --message="Upgrading source files..."

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

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

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=2

# Create a dedicated PHP-FPM config
ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..."

php_config=$final_path/inc/config.php

ynh_backup_if_checksum_is_different --file=$php_config

cp $php_config.in $php_config

admin_url="${path_url%/}/admin/index.php"

email=$(ynh_user_get_info --username=$admin --key=mail)

# Config as if we called in admin/install/wizard.php
ynh_replace_string --match_string="'DC_DBDRIVER', ''" --replace_string="'DC_DBDRIVER', 'mysqli'" --target_file=$php_config
ynh_replace_string --match_string="'DC_DBHOST', ''" --replace_string="'DC_DBHOST', 'localhost'" --target_file=$php_config
ynh_replace_string --match_string="'DC_DBUSER', ''" --replace_string="'DC_DBUSER', '$db_user'" --target_file=$php_config
ynh_replace_string --match_string="'DC_DBPASSWORD', ''" --replace_string="'DC_DBPASSWORD', '$db_pwd'" --target_file=$php_config
ynh_replace_string --match_string="'DC_DBNAME', ''" --replace_string="'DC_DBNAME', '$db_name'" --target_file=$php_config
ynh_replace_string --match_string="'DC_MASTER_KEY', ''" --replace_string="'DC_MASTER_KEY', '$master_key'" --target_file=$php_config
ynh_replace_string --match_string="'DC_ADMIN_URL', ''" --replace_string="'DC_ADMIN_URL', 'https://$domain$admin_url'" --target_file=$php_config
ynh_replace_string --match_string="'DC_ADMIN_MAILFROM', ''" --replace_string="'DC_ADMIN_MAILFROM', '$email'" --target_file=$php_config

# Adding LDAP login
cp ../conf/class.auth.ldap.php $final_path/inc/class.auth.ldap.php
ynh_replace_string "__APP__" "$app" $final_path/inc/class.auth.ldap.php

cat << EOF >> $php_config

\$__autoload['ldapDcAuth'] = dirname(__FILE__).'/class.auth.ldap.php';
define('DC_AUTH_CLASS','ldapDcAuth');
EOF

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file=$php_config

chmod 400 "$php_config"
chown $app:$app "$php_config"

#=================================================
# UPDATING DATABASE
#=================================================

ynh_permission_update --permission "admin" --add "visitors"

# Navigate to the admin panel to upgrade the database: https://dotclear.org/documentation/2.0/admin/upgrades
adminUrl="/admin/auth.php"
ynh_local_curl $adminUrl

ynh_permission_update --permission "admin" --remove "visitors"

#=================================================
# GENERIC FINALIZATION
#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring Fail2Ban..."

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Invalid credentials in $final_path/inc/class.auth.ldap.php .* client: <HOST>, .*https://$domain${path_url%/}/admin/auth.php"

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

ynh_systemd_action --service_name=nginx --action=reload
ynh_systemd_action --service_name=php$YNH_PHP_VERSION-fpm --action=reload

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

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