#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

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)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
site_name=$(ynh_app_setting_get --app=$app --key=site_name)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
fpm_free_footprint=$(ynh_app_setting_get --app=$app --key=fpm_free_footprint)
fpm_usage=$(ynh_app_setting_get --app=$app --key=fpm_usage)

#=================================================
# 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=10

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# 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..." --weight=1

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

# 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"
fi

# If the site_name is not defined
if [ -z "$site_name" ]; then
	site_name="YunoHost"
	ynh_app_setting_set --app=$app --key=site_name --value=$site_name
fi

# If fpm_footprint doesn't exist, create it
if [ -z "$fpm_footprint" ]; then
    fpm_footprint=low
    ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
fi

# If fpm_free_footprint doesn't exist, create it
if [ -z "$fpm_free_footprint" ]; then
    fpm_free_footprint=0
    ynh_app_setting_set --app=$app --key=fpm_free_footprint --value=$fpm_free_footprint
fi

# If fpm_usage doesn't exist, create it
if [ -z "$fpm_usage" ]; then
    fpm_usage=low
    ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
fi


# If datadir doesn't exist, create it
if [ -z "$datadir" ]; then
	datadir=$(ynh_app_setting_get --app=$app --key=data_path)
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
	ynh_app_setting_delete --app=$app --key=data_path
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=4

# 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
	ynh_script_progression --message="Upgrading source files..." --weight=6

	# Create a temporary directory
	tmpdir="$(mktemp -d)"

	# Backup the config file in the temp dir
	cp -a "$final_path/config.php" "$tmpdir/config.php"

	# Remove the app directory securely
	ynh_secure_remove --file="$final_path"

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

	# Copy the admin saved settings from tmp directory to final path 
	cp -a "$tmpdir/config.php" "$final_path/config.php" 

	# Remove the tmp directory securely
	ynh_secure_remove --file="$tmpdir"
fi

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

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=1

# Create a dedicated PHP-FPM config
ynh_add_fpm_config --phpversion=$phpversion --usage=$fpm_usage --footprint=$fpm_footprint

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ACTIVATE LDAP SUPPORT
#=================================================
ynh_script_progression --message="Activate LDAP support..." --weight=20

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';"

php${phpversion} "$final_path/admin/cli/purge_caches.php"

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

#=================================================
# ADD CRON JOB
#=================================================
ynh_script_progression --message="Adding cron job..." --weight=4

ynh_add_config --template="../conf/cron" --destination="/etc/cron.d/$app"
chown root: "/etc/cron.d/$app"
chmod 644 "/etc/cron.d/$app"

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

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

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