#!/bin/bash

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

ynh_app_setting_set_default --key=php_upload_max_filesize --value=25M

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

# If fpm_footprint doesn't exist, create it
if [ -z "${fpm_footprint:-}" ]; then
    fpm_footprint=low
#REMOVEME? Everything about fpm_footprint is removed in helpers2.1... |     ynh_app_setting_set --key=fpm_footprint --value=$fpm_footprint
fi

# If fpm_free_footprint doesn't exist, create it
if [ -z "${fpm_free_footprint:-}" ]; then
    fpm_free_footprint=0
#REMOVEME? Everything about fpm_free_footprint is removed in helpers2.1... |     ynh_app_setting_set --key=fpm_free_footprint --value=$fpm_free_footprint
fi

# If fpm_usage doesn't exist, create it
if [ -z "${fpm_usage:-}" ]; then
    fpm_usage=low
#REMOVEME? Everything about fpm_usage is removed in helpers2.1... |     ynh_app_setting_set --key=fpm_usage --value=$fpm_usage
fi

# Yunohost specific configuration, if it isn't exist already

# Previously, these settings were store in an unique "dokuwiki.php"
# Now, they are split in multiple 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 an empty configuration file if it does not exist
# This file will be overwritten anyway later in the part "# LDAP Configuration"
# The file is created here to prevent a failure of the helper `ynh_backup_if_checksum_is_different`
if [ ! -f "$install_dir/conf/local.protected.php" ]; then
	touch $install_dir/conf/local.protected.php
fi

# Do not overwrite existing dokuwiki configuration as it could have user customization's and settings.
# Create file if it does not exist
if [ ! -f "$install_dir/conf/local.php" ]; then
	# Set the default "language"
	ynh_config_add --template="local.php" --destination="$install_dir/conf/local.php"
fi

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

# For securing DokuWiki installation, create default files that will be writable in the "conf" folder.
# Other files will be read ony and owned by root.
# See https://www.dokuwiki.org/install:permissions

# If file does not exists
if [ ! -f "$install_dir/conf/local.php.bak" ]; then
	# if template exists
	if [ -f "$install_dir/conf/local.php.dist" ]; then
		# Copy template to create default file
		cp --archive "$install_dir/conf/local.php.dist" "$install_dir/conf/local.php.bak"
	fi
fi

if [ ! -f "$install_dir/conf/users.auth.php" ]; then
	if [ -f "$install_dir/conf/users.auth.php.dist" ]; then
		cp --archive $install_dir/conf/users.auth.php.dist $install_dir/conf/users.auth.php
	fi
fi

if [ ! -f "$install_dir/conf/plugins.local.php" ]; then
	cp --archive ../conf/plugins.local.php $install_dir/conf
fi

if [ ! -f "$install_dir/conf/plugins.local.php.bak" ]; then
	cp --archive ../conf/plugins.local.php $install_dir/conf/plugins.local.php.bak
fi

if [ ! -f "$install_dir/inc/preload.php" ]; then
	# if template exists
	if [ -f "$install_dir/inc/preload.php.dist" ]; then
		# Copy template to create default file
		cp --archive "$install_dir/inc/preload.php.dist" "$install_dir/inc/preload.php"
	fi
fi

# purge "LOGAUTHERROR PLUGIN" as not compatible and not maintained anymore
# See https://www.dokuwiki.org/plugin:logautherror
if [ -d "$install_dir/lib/plugins/logautherror" ]; then
    ynh_script_progression "Purge "LOGAUTHERROR PLUGIN" as not maintained anymore"
    ynh_safe_rm "$install_dir/lib/plugins/logautherror"
fi

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

# FIXME: this is still supported but the recommendation is now to *always* re-setup the app sources wether or not the upstream sources changed
if ynh_app_upstream_version_changed
then
	ynh_script_progression "Upgrading source files..."

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

#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod -R o-rwx "$install_dir"
#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown -R $app:www-data "$install_dir"
#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression "Upgrading system configurations related to $app..."

# Create a dedicated PHP-FPM config
ynh_config_add_phpfpm

# Create a dedicated NGINX config
ynh_config_add_nginx

#=================================================
# UPGRADE DOKUWIKI
#=================================================

# FIXME: this is still supported but the recommendation is now to *always* re-setup the app sources wether or not the upstream sources changed
if ynh_app_upstream_version_changed
then
    ynh_script_progression "Upgrading DokuWiki..."

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

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

        # Feed output of grep[...] line by line to 'ynh_safe_rm '
        # 'ynh_safe_rm ' can only work file by file. Cannot work with a list
        # This is a (complicated) workaround this limitation
        while IFS= read -r line; do

            # Added this test to reduce the spam printed by helper to the user in the webadmin.
            # Should be less 'scary' to them I think
            #
            # number of messages = number of lines *2    (673 lines while writing this)
            ### grep --extended-regexp --invert-match '^($|#)' data/deleted.files | wc -l
            ### 673
            #
            # Spam sample:
                #Attention : /!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time.
                #Info : 'inc/parser/spamcheck.php' wasn't deleted because it doesn't exist.
                #Attention : /!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time.
                #Attention : /!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time.
                #Info : 'lib/images/favicon.ico' wasn't deleted because it doesn't exist.
                #Info : 'lib/images/thumbup.gif' wasn't deleted because it doesn't exist.
                #Attention : /!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time.
                #Info : 'lib/images/toolbar/code.png' wasn't deleted because it doesn't exist.
                #Attention : /!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time.
                #Info : 'lib/images/toolbar/empty.png' wasn't deleted because it doesn't exist.
            if [ -f "$line" ]; then
                ynh_safe_rm "$line"
            fi
        done < <(grep --null --extended-regexp --invert-match '^($|#)' "$install_dir/data/deleted.files" | xargs --null --max-args=1 || true)
        #    ^ ^  First < is redirection, second is process substitution.
        # Source: https://tldp.org/LDP/abs/html/process-sub.html

        # Previous attemps if someone reads this one day
        ###grep --extended-regexp --invert-match '^($|#)' data/deleted.files | xargs --max-args=1 rm --verbose --force --dir 2>&1 || true
        ###grep --extended-regexp --invert-match '^($|#)' data/deleted.files | xargs --max-args=1 ynh_safe_rm 2>&1

        ###grep --null --extended-regexp --invert-match '^($|#)' data/deleted.files > toto.list
        ###xargs --null --verbose --max-args=1 --arg-file=toto.list ynh_safe_rm 2>&1
fi

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

    # if "file" exists and is executable
    # Stolen from https://github.com/YunoHost-Apps/grav_ynh/blob/testing/scripts/upgrade#L189
    if [ -x "$install_dir/bin/plugin.php" ]; then
        pushd "$install_dir"
            ynh_hide_warnings ynh_exec_as_app php$php_version bin/plugin.php --no-colors extension upgrade || ynh_print_warn "Automatic plugin upgrade has failed, you can upgrade them from your DokuWiki admin panel."
        popd
    else
        ynh_print_warn "Automatic plugin cannot be done, you have to upgrade them from your DokuWiki admin panel."
    fi
fi

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression "Adding $app's configuration..."

# Customize admin group in case of multiple wiki install managed by different admins
# dokuwiki.admin; dokuwiki__1.admin; etc
ynh_config_add --template="local.protected.php" --destination="$install_dir/conf/local.protected.php"

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression "Reconfiguring Fail2Ban..."

# Create a dedicated Fail2Ban config
ynh_config_add_fail2ban --logpath="/var/log/nginx/$domain-error.log" --failregex="^.*authentication failure. while reading response header from upstream, client: <HOST>,.*POST $path.*$"

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

ynh_script_progression "Upgrade of $app completed"