#!/bin/bash

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

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

#=================================================
# 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)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
data_path=$(ynh_app_setting_get --app=$app --key=data_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)

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

upgrade_type=$(ynh_check_app_version_changed)

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

# If the admin is not defined, We can't upgrade this app
if [ -z $admin ]; then
	ynh_die --message="This app can't be upgraded from a very old version of the package. Please remove and reinstall Moodle_ynh"
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=30

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=6

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

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

# Create a dedicated nginx config
ynh_add_nginx_config YNH_PHP_VERSION

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=30

if [ "$(lsb_release --codename --short)" = "stretch" ]; then
	ynh_install_app_dependencies $pkg_dependencies
	ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
else
	pkg_dependencies="$pkg_dependencies $extra_pkg_dependencies"
	ynh_install_app_dependencies $pkg_dependencies
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

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

# Create a dedicated php-fpm config
ynh_add_fpm_config --phpversion="$YNH_PHP_VERSION"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

ynh_backup_if_checksum_is_different --file="$final_path/config.php"

exec_as "$app" php$YNH_PHP_VERSION "$final_path/admin/cli/upgrade.php" --non-interactive

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/config.php"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown -R "$app": "$data_path"
chown -R "$app": "$final_path"

#=================================================
# ADD CRON JOB
#=================================================

# Set up poller
sudo cp "../conf/cron" "/etc/cron.d/$app"
ynh_replace_string "__APP__" "$app" "/etc/cron.d/$app"
ynh_replace_string "__FINAL_PATH__" "$final_path" "/etc/cron.d/$app"
ynh_replace_string "__YNH_PHP_VERSION__" "$YNH_PHP_VERSION" "/etc/cron.d/$app"

#=================================================
# ACTIVATE LDAP SUPPORT
#=================================================

ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config SET value='ldap,email' WHERE name='auth';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='ldap://127.0.0.1/' WHERE plugin='auth_ldap' AND name='host_url';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='uid' WHERE plugin='auth_ldap' AND name='user_attribute';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='ou=users,dc=yunohost,dc=org' WHERE plugin='auth_ldap' AND name='contexts';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='givenName' WHERE plugin='auth_ldap' AND name='field_map_firstname';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='sn' WHERE plugin='auth_ldap' AND name='field_map_lastname';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='mail' WHERE plugin='auth_ldap' AND name='field_map_email';"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='onlogin' WHERE plugin='auth_ldap' AND (name='field_updatelocal_firstname' OR name='field_updatelocal_lastname' OR name='field_updatelocal_email');"
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_config_plugins SET value='locked' WHERE plugin='auth_ldap' AND (name='field_lock_firstname' OR name='field_lock_lastname' OR name='field_lock_email');"

# The admin is an ldap user
ynh_psql_execute_as_root --database=$db_name --sql="UPDATE public.mdl_user SET auth='ldap' WHERE username='$admin';"

exec_as "$app" php$YNH_PHP_VERSION "$final_path/admin/cli/purge_caches.php"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
fi

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