#!/bin/bash

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

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

#=================================================
# LOAD 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 $app is_public)
# Not needed during upgrade as user might have change it since installation from Dokuwiki admin panel
#language=$(ynh_app_setting_get $app language)
final_path=$(ynh_app_setting_get $app final_path)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================

# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set $app is_public 1
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set $app is_public 0
	is_public=0
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

# TODO Not sure if still needed ??
# admin default value, if not set
if [ -z "$admin" ]; then
	admin=$(sudo yunohost user list | grep 'username' -m1 | awk '{print $2}')
	sudo ynh_app_setting_set $app is_public -v "$is_public"
fi

# language default value, if not set
if [ -z "$language" ]; then
	language='en'
	ynh_app_setting_set $app language $language
fi


# Yunohost specific configuration, if not exists

# Previously, these settings were store a unique "dokuwiki.php"
# Now, they are split in multiples files to ease upgrading process (separate Yunohost config from user config)

# Loading order of configuration files
#
# By default DokuWiki loads its configuration files in the following order:
# 
# 1. conf/dokuwiki.php
# 2. conf/local.php
# 3. conf/local.protected.php
#
# See https://www.dokuwiki.org/plugin:config#protecting_settings


# Configuration dedicated to Yunohost (LDAP and admin mainly)
# Create file if it does not exist
if [ ! -f "$final_path/conf/local.protected.php" ]; then
	# Set the default "admin"
	# Replace string in order to have a functionnal configuration file
	ynh_replace_string "__YNH_ADMIN_USER__" "$admin" "../conf/local.protected.php"

	cp ../conf/local.protected.php $final_path/conf
fi

# Do not overwrite existing dokuwiki configuration as it could have user customization's and settings.
# Cannot use helper "ynh_backup_if_checksum_is_different"
# Create file if it does not exist
if [ ! -f "$final_path/conf/local.php" ]; then
	# Set the default "language" only when file does not exist beforehand
	# Replace string in order to have a functionnal configuration file
	ynh_replace_string "__YNH_LANGUAGE__" "$language" "../conf/local.php"

	cp ../conf/local.php $final_path/conf
fi

# Do not overwrite existing ACL configuration file as it could have user customization's and settings.
# Cannot use helper "ynh_backup_if_checksum_is_different"
# Create file if it does not exist
# See https://www.dokuwiki.org/acl#background_info
if [ ! -f "$final_path/conf/acl.auth.php" ]; then
	cp ../conf/acl.auth.php $final_path/conf
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================

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

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

#=================================================
# NGINX CONFIGURATION
#=================================================

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================

# Create a system user
ynh_system_user_create $app

#=================================================
# PHP-FPM CONFIGURATION
#=================================================

# Create a dedicated php-fpm config
ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================

# TODO Taken from old "upgrade" script. Should check if it is needed and what it does
if [ -d "${final_path}/data/media" ]; then
	chown -R $app:root $final_path/{data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp}
fi

# Remove upgrade notification inside Dokuwiki's admin panel
# See https://www.dokuwiki.org/update_check
touch $final_path/doku.php

# Remove files not used anymore after upgrade
# See https://www.dokuwiki.org/install:unused_files
if [ -f "$final_path/data/deleted.files" ]; then

	# Use a "sub process" to start a new shell to run these commands
	# Allow to use only one "cd" and to be more efficent
	(
		# Move to the dokuwiki installation folder so the "official" commands can be used without adaptation
		cd $final_path

		# This command could not remove directory
		#grep -Ev '^($|#)' data/deleted.files | xargs -n 1 rm -vf
		# => "rm: cannot remove 'vendor/easybook/geshi': Is a directory"

		# That one works as expected
		grep -Ev '^($|#)' data/deleted.files | xargs -n 1 rm -fr
	)
fi

# Update all plugins
for name_plugin in $(sudo -s cat $final_path/lib/plugins/*/plugin.info.txt | grep url | awk -F':' '{print $3}');
do
	# Get a official plugin for dokuwiki, not update a no-official
	sudo wget -nv --quiet "https://github.com/splitbrain/dokuwiki-plugin-${name_plugin}/zipball/master" -O "${name_plugin}.zip" -o /dev/null || true
	if [ -s "${name_plugin}.zip" ]; then
		sudo unzip ${name_plugin}.zip
		sudo cp -a splitbrain-dokuwiki-plugin-${name_plugin}*/. "${final_path}/lib/plugins/${name_plugin}/"
	fi
done

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

# Verify if existing file needs to be upgraded by comparing it's size to new file from package
# If different, do a backup of existing file and overwrite with new file
# 
# Safe here as this file is only used by Yunohost. Dokuwiki cannot modified it.
ynh_backup_if_checksum_is_different "$final_path/conf/local.protected.php"

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum "$final_path/conf/local.protected.php"


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

# Files owned by dokuwiki can just read
chown -R root: $final_path

# except for conf, data, some data subfolders, and lib/plugin, where dokuwiki must have write permissions
#TODO compare rights with install script !!!
# Install script :
#sudo chown -R $app:root $final_path/{conf,data,data/attic,data/cache,data/index,data/locks,data/media*,data/meta,data/pages,data/tmp,lib/plugins,lib/tpl}

chown -R $app:root $final_path/{conf,data,lib/plugins,lib/tpl}
chmod -R 700 $final_path/conf
chmod -R 700 $final_path/data
chmod -R 755 $final_path/lib/plugins
chmod 755 $final_path/lib/tpl/{dokuwiki,dokuwiki/images}


#=================================================
# SETUP SSOWAT
#=================================================

if [ $is_public -eq 0 ]
then	# Remove the public access
	ynh_app_setting_delete $app skipped_uris
fi
# 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 unprotected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================

systemctl reload nginx