#!/bin/bash

#################################################################################################################
# DO NOT USE THIS SCRIPT WHEN UPDATING NEXTCLOUD / YOUR SERVER! RUN `sudo bash /var/scripts/update.sh` INSTEAD. #
#################################################################################################################

true
SCRIPT_NAME="Nextcloud Update Script"
# shellcheck source=lib.sh
source <(curl -sL https://raw.githubusercontent.com/nextcloud/vm/master/lib.sh)

# Get all needed variables from the library
ncdb
nc_update

# T&M Hansson IT AB © - 2021, https://www.hanssonit.se/

# Check for errors + debug code and abort if something isn't right
# 1 = ON
# 0 = OFF
DEBUG=0
debug_mode

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin

# Must be root
root_check

# Check if dpkg or apt is running
is_process_running apt
is_process_running dpkg

# Check for pending-snapshot
if does_snapshot_exist "NcVM-snapshot-pending"
then
    msg_box "Cannot proceed with the update currently because NcVM-snapshot-pending exists.\n
It is possible that a backup is currently running or an update wasn't successful.\n
Advice: don't restart your system now if that is the case!\n
If you are sure that no update or backup is currently running, you can fix this by rebooting your server."
    # Kill all "$SCRIPTS/update.sh" processes to make sure that no automatic restart happens after exiting this script
    # shellcheck disable=2009
    PROCESS_IDS=$(ps aux | grep "$SCRIPTS/update.sh" | grep -v grep | awk '{print $2}')
    if [ -n "$PROCESS_IDS" ]
    then
        mapfile -t PROCESS_IDS <<< "$PROCESS_IDS"
        for process in "${PROCESS_IDS[@]}"
        do
            print_text_in_color "$ICyan" "Killing the process with PID $process to prevent a potential automatic restart..."
            if ! kill "$process"
            then
                print_text_in_color "$IRed" "Couldn't kill the process with PID $process..."
            fi
        done
    fi
    exit 1
fi

# Change from APCu to Redis for local cache
# https://github.com/nextcloud/vm/pull/2040
if pecl list | grep apcu >/dev/null 2>&1
then
    sed -i "/memcache.local/d" "$NCPATH"/config/config.php
    if pecl list | grep redis >/dev/null 2>&1
    then
        nextcloud_occ config:system:set memcache.local --value='\OC\Memcache\Redis'
    else
       nextcloud_occ config:system:delete memcache.local
    fi
fi

# Create a snapshot before doing anything else
check_free_space
if ! [ -f "$SCRIPTS/nextcloud-startup-script.sh" ] && (does_snapshot_exist "NcVM-startup" \
|| does_snapshot_exist "NcVM-snapshot" || [ "$FREE_SPACE" -ge 50 ] )
then
    # Add automatical unlock upon reboot
    crontab -u root -l | grep -v "lvrename /dev/ubuntu-vg/NcVM-snapshot-pending"  | crontab -u root -
    crontab -u root -l | { cat; echo "@reboot /usr/sbin/lvrename /dev/ubuntu-vg/NcVM-snapshot-pending \
/dev/ubuntu-vg/NcVM-snapshot &>/dev/null" ; } | crontab -u root -
    SNAPSHOT_EXISTS=1
    if is_docker_running
    then
        check_command systemctl stop docker
    fi
    nextcloud_occ maintenance:mode --on
    if does_snapshot_exist "NcVM-startup"
    then
        check_command lvremove /dev/ubuntu-vg/NcVM-startup -y
    elif does_snapshot_exist "NcVM-snapshot"
    then
        if ! lvremove /dev/ubuntu-vg/NcVM-snapshot -y
        then
            nextcloud_occ maintenance:mode --off
            start_if_stopped docker
            notify_admin_gui "Update failed!" \
"Could not remove NcVM-snapshot - Please reboot your server! $(date +%T)"
            msg_box "It seems like the old snapshot could not get removed.
This should work again after a reboot of your server."
            exit 1
        fi
    fi
    if ! lvcreate --size 5G --snapshot --name "NcVM-snapshot" /dev/ubuntu-vg/ubuntu-lv
    then
        nextcloud_occ maintenance:mode --off
        start_if_stopped docker
        notify_admin_gui "Update failed!" \
"Could not create NcVM-snapshot - Please reboot your server! $(date +%T)"
        msg_box "The creation of a snapshot failed.
If you just merged and old one, please reboot your server again. 
It should then start working again."
        exit 1
    fi
    if ! lvrename /dev/ubuntu-vg/NcVM-snapshot /dev/ubuntu-vg/NcVM-snapshot-pending
    then
        nextcloud_occ maintenance:mode --off
        start_if_stopped docker
        msg_box "Could not rename the snapshot before starting the update. Please reboot your system!"
        exit 1
    fi
    nextcloud_occ maintenance:mode --off
    start_if_stopped docker
fi

# Check if /boot is filled more than 90% and exit the script if that's
# the case since we don't want to end up with a broken system
if [ -d /boot ]
then
    if [[ "$(df -h | grep -m 1 /boot | awk '{print $5}' | cut -d "%" -f1)" -gt 90 ]]
    then
        msg_box "It seems like your boot drive is more than 90% full. \
You can't proceed to upgrade, as it would likely break your system.

To be able to proceed with the update you need to delete some old Linux kernels. If you need support, please visit:
https://shop.hanssonit.se/product/premium-support-per-30-minutes/"
        exit
    fi
fi

# Remove leftovers
rm -f /root/php-upgrade.sh
rm -f /tmp/php-upgrade.sh
rm -f /root/db-migration.sh

# Fix fancy progress bar for apt-get
# https://askubuntu.com/a/754653
if [ -d /etc/apt/apt.conf.d ]
then
    if ! [ -f /etc/apt/apt.conf.d/99progressbar ]
    then
        echo 'Dpkg::Progress-Fancy "1";' > /etc/apt/apt.conf.d/99progressbar
        echo 'APT::Color "1";' >> /etc/apt/apt.conf.d/99progressbar
        chmod 644 /etc/apt/apt.conf.d/99progressbar
    fi
fi

# Ubuntu 16.04 is deprecated
check_distro_version

# Hold PHP if Ondrejs PPA is used
print_text_in_color "$ICyan" "Fetching latest packages with apt..."
apt-get update -q4 & spinner_loading
if apt-cache policy | grep "ondrej" >/dev/null 2>&1
then
    print_text_in_color "$ICyan" "Ondrejs PPA is installed. \
Holding PHP to avoid upgrading to a newer version without migration..."
    apt-mark hold php*
    #check_php
    #apt-mark unhold php"$PHPVER"*
fi

# Don't allow MySQL/MariaDB
if ! grep -q pgsql /var/www/nextcloud/config/config.php || dpkg -l | grep -q mariadb-common
then
    msg_box "MySQL/MariaDB is not supported in this script anymore. Please contact us to get support \
for upgrading your server: https://shop.hanssonit.se/product/premium-support-per-30-minutes/"
    exit 0
fi

# Check if the DIR actually is a file
if [ -f /var/log/nextcloud ]
then
    rm -f /var/log/nextcloud
fi

# Move all logs to new dir (2019-09-04) # updated 2021-01-27
mkdir -p "$VMLOGS"

find_log() {
    NCLOG=$(find / -type f -name "nextcloud.log" 2> /dev/null)
    if [ "$NCLOG" != "$VMLOGS/nextcloud.log" ]
    then
        # Might enter here if no OR multiple logs already exist, tidy up any existing logs and set the correct path
        print_text_in_color "$ICyan" "Unexpected or non-existent logging configuration - \
deleting any discovered nextcloud.log files and creating a new one at $VMLOGS/nextcloud.log..."
        xargs rm -f <<< "$NCLOG"
        # Set logging
        nextcloud_occ config:system:set log_type --value=file
        nextcloud_occ config:system:set logfile --value="$VMLOGS/nextcloud.log"
        nextcloud_occ config:system:set loglevel --value=2
        touch "$VMLOGS/nextcloud.log"
        chown www-data:www-data "$VMLOGS/nextcloud.log"
    fi
}
if [ -d /var/log/ncvm/ ]
then
    rsync -Aaxz /var/log/ncvm/ "$VMLOGS"
    rm -Rf /var/log/ncvm/
    rm -f "$NCDATA"/*.log*
elif [ -d /var/ncdata/ ] && [ -n "$(find /var/ncdata -maxdepth 1 -name "*.log")" ]
then
    rsync -Aaxz /var/ncdata/*.log "$VMLOGS"
    rm -f /var/ncdata/*.log*
elif [ -n "$(find "$NCDATA" -maxdepth 1 -name "*.log")" ]
then
    rsync -Aaxz "$NCDATA"/*.log "$VMLOGS"
    rm -f "$NCDATA"/*.log*
fi

# Set secure permissions
if [ ! -f "$SECURE" ]
then
    mkdir -p "$SCRIPTS"
    download_script STATIC setup_secure_permissions_nextcloud
    chmod +x "$SECURE"
else
    rm "$SECURE"
    download_script STATIC setup_secure_permissions_nextcloud
    chmod +x "$SECURE"
fi

# Remove the local lib.sh since it's causing issues with new functions (2020-06-01)
if [ -f $SCRIPTS/lib.sh ]
then
    rm -f $SCRIPTS/lib.sh
fi

# Make sure everyone gets access to menu.sh
download_script MENU menu

# Make sure fetch_lib.sh is available
download_script STATIC fetch_lib

# Update docker-ce to overlay2 since devicemapper is deprecated
if [ -f /etc/systemd/system/docker.service ]
then
    if grep -q "devicemapper" /etc/systemd/system/docker.service
    then
        print_text_in_color "$ICyan" "Changing to Overlay2 for Docker CE..."
        print_text_in_color "$ICyan" "Please report any issues to $ISSUES."
        run_script STATIC docker_overlay2
    elif grep -q "aufs" /etc/default/docker
    then
        apt-mark hold docker-ce
        run_script STATIC docker_overlay2
    fi
fi

# Upgrade OS dependencies
export DEBIAN_FRONTEND=noninteractive ; apt-get dist-upgrade -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"

# Fix Realtek on PN51
if asuspn51
then
    # Upgrade Realtek drivers
    print_text_in_color "$ICyan" "Upgrading Realtek firmware..."
    curl_to_dir https://raw.githubusercontent.com/nextcloud/vm/master/network/asusnuc pn51.sh "$SCRIPTS"
    bash "$SCRIPTS"/pn51.sh
fi

# Update Netdata
if [ -d /etc/netdata ]
then
    print_text_in_color "$ICyan" "Updating Netdata..."
    install_if_not cmake # Needed for Netdata in newer versions
    install_if_not libuv1-dev # Needed for Netdata in newer versions
    NETDATA_UPDATER_PATH="$(find /usr -name 'netdata-updater.sh')"
    if [ -n "$NETDATA_UPDATER_PATH" ]
    then
        bash "$NETDATA_UPDATER_PATH"
    else
        curl_to_dir https://raw.githubusercontent.com/netdata/netdata/master/packaging/installer/ netdata-updater.sh "$SCRIPTS"
        bash "$SCRIPTS"/netdata-updater.sh
        rm -f "$SCRIPTS"/netdata-updater.sh
    fi
fi

# Reinstall certbot (use snap instead of package)
# https://askubuntu.com/a/1271565
if dpkg -l | grep certbot >/dev/null 2>&1
then
    # certbot will be removed, but still listed, so we need to check if the snap is installed as well so that this doesn't run every time
    if ! snap list certbot >/dev/null 2>&1
    then
        print_text_in_color "$ICyan" "Reinstalling certbot (Let's Encrypt) as a snap instead..."
        apt-get remove certbot -y
        apt-get autoremove -y
        install_if_not snapd
        snap install core
        snap install certbot --classic
        # Update $PATH in current session (login and logout is required otherwise)
        check_command hash -r
    fi
fi

# Fix PHP error message
mkdir -p /tmp/pear/cache

# Update Redis PHP extension (18.04 --> 20.04 since 16.04 already is deprecated in the top of this script)
print_text_in_color "$ICyan" "Trying to upgrade the Redis PECL extension..."

# Check current PHP version
check_php

# Do the upgrade
if pecl list | grep redis >/dev/null 2>&1
then
    if is_this_installed php"$PHPVER"-common
    then
        install_if_not php"$PHPVER"-dev
    fi
    pecl channel-update pecl.php.net
    yes no | pecl upgrade redis
    systemctl restart redis-server.service
fi
# Remove old redis
if grep -qFx extension=redis.so "$PHP_INI"
then
    sed -i "/extension=redis.so/d" "$PHP_INI"
fi
# Check if redis is enabled and create the file if not
if [ ! -f $PHP_MODS_DIR/redis.ini ]
then
    touch $PHP_MODS_DIR/redis.ini
fi
# Enable new redis
if ! grep -qFx extension=redis.so $PHP_MODS_DIR/redis.ini
then
    echo "# PECL redis" > $PHP_MODS_DIR/redis.ini
    echo "extension=redis.so" >> $PHP_MODS_DIR/redis.ini
    check_command phpenmod -v ALL redis
fi

# Remove APCu https://github.com/nextcloud/vm/issues/2039
if is_this_installed "php$PHPVER"-dev
then
    # Delete PECL APCu
    if pecl list | grep -q apcu
    then
        if ! yes no | pecl uninstall apcu
        then
            msg_box "APCu PHP module removal failed! Please report this to $ISSUES"
        else
            print_text_in_color "$IGreen" "APCu PHP module removal OK!"
        fi
        # Delete everything else
        check_command phpdismod -v ALL apcu
        rm -f "$PHP_MODS_DIR"/apcu.ini
        rm -f "$PHP_MODS_DIR"/apcu_bc.ini
        sed -i "/extension=apcu.so/d" "$PHP_INI"
        sed -i "/APCu/d" "$PHP_INI"
        sed -i "/apc./d" "$PHP_INI"
    fi
fi

# Also remove php-acpu if installed
if is_this_installed php-acpu
then
    apt-get purge php-apcu
    apt-get autoremove -y
fi
if is_this_installed php"$PHPVER"-apcu
then
    apt-get purge php"$PHPVER"-apcu
    apt-get autoremove -y
fi

# Upgrade other PECL dependencies
if [ "${CURRENTVERSION%%.*}" -ge "17" ]
then
    if [ -f "$PHP_INI" ]
    then
        print_text_in_color "$ICyan" "Trying to upgrade igbinary, and smbclient..."
        if pecl list | grep igbinary >/dev/null 2>&1
        then
            yes no | pecl upgrade igbinary
            # Remove old igbinary
            if grep -qFx extension=igbinary.so "$PHP_INI"
            then
                sed -i "/extension=igbinary.so/d" "$PHP_INI"
            fi
            # Check if igbinary is enabled and create the file if not
            if [ ! -f $PHP_MODS_DIR/igbinary.ini ]
            then
                touch $PHP_MODS_DIR/igbinary.ini
            fi
            # Enable new igbinary
            if ! grep -qFx extension=igbinary.so $PHP_MODS_DIR/igbinary.ini
            then
                echo "# PECL igbinary" > $PHP_MODS_DIR/igbinary.ini
                echo "extension=igbinary.so" >> $PHP_MODS_DIR/igbinary.ini
                check_command phpenmod -v ALL igbinary
            fi
        fi
        if pecl list | grep -q smbclient
        then
            yes no | pecl upgrade smbclient
            # Check if smbclient is enabled and create the file if not
            if [ ! -f $PHP_MODS_DIR/smbclient.ini ]
            then
               touch $PHP_MODS_DIR/smbclient.ini
            fi
            # Enable new smbclient
            if ! grep -qFx extension=smbclient.so $PHP_MODS_DIR/smbclient.ini
            then
                echo "# PECL smbclient" > $PHP_MODS_DIR/smbclient.ini
                echo "extension=smbclient.so" >> $PHP_MODS_DIR/smbclient.ini
                check_command phpenmod -v ALL smbclient
            fi
            # Remove old smbclient
            if grep -qFx extension=smbclient.so "$PHP_INI"
            then
                sed -i "/extension=smbclient.so/d" "$PHP_INI"
            fi
        fi
        if pecl list | grep -q inotify
        then
            # Remove old inotify
            if grep -qFx extension=inotify.so "$PHP_INI"
            then
                sed -i "/extension=inotify.so/d" "$PHP_INI"
            fi
            yes no | pecl upgrade inotify
            if [ ! -f $PHP_MODS_DIR/inotify.ini ]
            then
                touch $PHP_MODS_DIR/inotify.ini
            fi
            if ! grep -qFx extension=inotify.so $PHP_MODS_DIR/inotify.ini
            then
                echo "# PECL inotify" > $PHP_MODS_DIR/inotify.ini
                echo "extension=inotify.so" >> $PHP_MODS_DIR/inotify.ini
                check_command phpenmod -v ALL inotify
            fi
        fi
    fi
fi

# Make sure services are restarted
restart_webserver

# Update adminer
if [ -d $ADMINERDIR ]
then
    print_text_in_color "$ICyan" "Updating Adminer..."
    rm -f "$ADMINERDIR"/latest.php "$ADMINERDIR"/adminer.php
    curl_to_dir "http://www.adminer.org" "latest.php" "$ADMINERDIR"
    ln -s "$ADMINERDIR"/latest.php "$ADMINERDIR"/adminer.php
fi

# Get newest dat files for geoblock.sh
if grep -q "^#Geoip-block" /etc/apache2/apache2.conf
then
    get_newest_dat_files
    check_command systemctl restart apache2
fi

# Update docker containers and remove Watchtower if Bitwarden is present due to compatibility issue
# If Watchtower is installed, but Bitwarden is missing, then let watchtower do its thing
# If Watchtower is installed together with Bitwarden, then remove Watchtower and run updates 
# individually depending on which docker containers that exist.
if is_docker_running
then
    # To fix https://github.com/nextcloud/vm/issues/1459 we need to remove Watchtower 
    # to avoid updating Bitwarden again, and only update the specified docker images above
    if docker ps -a --format '{{.Names}}' | grep -Eq "bitwarden";
    then
        if [ -d /root/bwdata ] || [ -d "$BITWARDEN_HOME"/bwdata ]
        then
            if does_this_docker_exist 'containrrr/watchtower'
            then
                docker stop watchtower
                WATCHTOWER=1
            elif does_this_docker_exist 'v2tec/watchtower'
            then
                docker stop watchtower
                WATCHTOWER=1
            fi
            docker container prune -f
            docker image prune -a -f
            docker volume prune -f
            if [ -n "$WATCHTOWER" ]
            then
                notify_admin_gui "Watchtower removed" "Due to compatibility issues with Bitwarden and Watchtower, \
we have removed Watchtower from this server. Updates will now happen for each container separately."
            fi
        fi
    fi
    # Update selected images
    # Vaultwarden
    docker_update_specific 'vaultwarden' "Vaultwarden"
    # Bitwarden RS
    if is_docker_running && docker ps -a --format '{{.Image}}' | grep -Eq "bitwardenrs/server:latest";
    then
        print_text_in_color "$ICyan" "Updating Bitwarden RS. This can take a while..."
        docker pull assaflavie/runlike &>/dev/null
        echo '#/bin/bash' > /tmp/bitwarden-conf
        chmod 700 /tmp/bitwarden-conf
        docker run --rm -v /var/run/docker.sock:/var/run/docker.sock assaflavie/runlike -p bitwarden_rs >> /tmp/bitwarden-conf
        sed -i 's|bitwardenrs/server:latest|vaultwarden/server:latest|' /tmp/bitwarden-conf
        docker stop bitwarden_rs
        docker rm bitwarden_rs
        if ! DOCKER_RUN_OUTPUT=$(bash /tmp/bitwarden-conf 2>&1)
        then
            check_command cp /tmp/bitwarden-conf "$SCRIPTS"
            chmod 700 "$SCRIPTS/bitwarden-conf"
            notify_admin_gui "Could not update Bitwarden RS." "Please recreate the docker container yourself.
You can find its config here: $SCRIPTS/bitwarden-conf
See the debug log below:
$DOCKER_RUN_OUTPUT"
            msg_box "Could not update Bitwarden RS. Please recreate the docker container yourself.
You can find its config here: $SCRIPTS/bitwarden-conf
See the debug log below:
$DOCKER_RUN_OUTPUT"
        else
            docker image prune -a -f
        fi
        rm -f /tmp/bitwarden-conf
    else
        docker_update_specific 'bitwarden_rs' "Bitwarden RS"
    fi
    # Collabora CODE
    docker_update_specific 'code' 'Collabora'
    # OnlyOffice
    docker_update_specific 'onlyoffice' 'OnlyOffice'
    # Full Text Search
    docker_update_specific 'fts_esror' 'Full Text Search'
    # Plex
    docker_update_specific 'plex' "Plex Media Server"
fi

# Cleanup un-used packages
apt-get autoremove -y
apt-get autoclean

# Update GRUB, just in case
update-grub

# Remove update lists
rm /var/lib/apt/lists/* -r

# Free some space (ZFS snapshots)
if is_this_installed libzfs2linux
then
    if grep -rq ncdata /etc/mtab
    then
        run_script DISK prune_zfs_snaphots
    fi
fi

# Fix bug in nextcloud.sh
CURRUSR="$(getent group sudo | cut -d: -f4 | cut -d, -f1)"
if grep -q "6.ifcfg.me" $SCRIPTS/nextcloud.sh &>/dev/null
then
   rm -f "$SCRIPTS/nextcloud.sh"
   download_script STATIC nextcloud
   chown "$CURRUSR":"$CURRUSR" "$SCRIPTS/nextcloud.sh"
   chmod +x "$SCRIPTS/nextcloud.sh"
elif [ -f $SCRIPTS/techandme.sh ]
then
   rm -f "$SCRIPTS/techandme.sh"
   download_script STATIC nextcloud
   chown "$CURRUSR":"$CURRUSR" "$SCRIPTS/nextcloud.sh"
   chmod +x "$SCRIPTS/nextcloud.sh"
   if [ -f /home/"$CURRUSR"/.bash_profile ]
   then
       sed -i "s|techandme|nextcloud|g" /home/"$CURRUSR"/.bash_profile
   elif [ -f /home/"$CURRUSR"/.profile ]
   then
       sed -i "s|techandme|nextcloud|g" /home/"$CURRUSR"/.profile
   fi
fi

# Update all Nextcloud apps
if [ "${CURRENTVERSION%%.*}" -ge "15" ]
then
    nextcloud_occ maintenance:mode --off
    # Check for upgrades
    print_text_in_color "$ICyan" "Trying to automatically update all Nextcloud apps..."
    UPDATED_APPS="$(nextcloud_occ_no_check app:update --all)"
fi

# Check which apps got updated
if [ -n "$UPDATED_APPS" ]
then
    print_text_in_color "$IGreen" "$UPDATED_APPS"
    notify_admin_gui \
    "Your apps just got updated!" \
    "$UPDATED_APPS"
    # Just make sure everything is updated (sometimes app requires occ upgrade to be run)
    nextcloud_occ upgrade
else
    print_text_in_color "$IGreen" "Your apps are already up to date!"
fi

# Restart notify push if existing
if [ -f "$NOTIFY_PUSH_SERVICE_PATH" ]
then
    systemctl restart notify_push
fi

# Nextcloud 13 is required.
lowest_compatible_nc 13

if [ -f /tmp/minor.version ]
then
    NCBAD=$(cat /tmp/minor.version)
    NCVERSION=$(curl -s -m 900 $NCREPO/ | sed --silent 's/.*href="nextcloud-\([^"]\+\).zip.asc".*/\1/p' | sort --version-sort | grep "${CURRENTVERSION%%.*}" | tail -1)
    export NCVERSION
    export STABLEVERSION="nextcloud-$NCVERSION"
    rm -f /tmp/minor.version
elif [ -f /tmp/nextmajor.version ]
then
    NCBAD=$(cat /tmp/nextmajor.version)
    NCVERSION=$(curl -s -m 900 $NCREPO/ | sed --silent 's/.*href="nextcloud-\([^"]\+\).zip.asc".*/\1/p' | sort --version-sort | grep $NCNEXT | tail -1)
    if [ -z "$NCVERSION" ]
    then
        msg_box "The version that you are trying to upgrade to doesn't exist."
        exit 1
    fi
    export NCVERSION
    export STABLEVERSION="nextcloud-$NCVERSION"
    rm -f /tmp/nextmajor.version
elif [ -f /tmp/prerelease.version ]
then
    PRERELEASE_VERSION=yes
    msg_box "WARNING! You are about to update to a Beta/RC version of Nextcloud.\nThere's no turning back, \
as it's not currently possible to downgrade.\n\nPlease only continue if you have made a backup, or took a snapshot."
    if ! yesno_box_no "Are you sure you would like to proceed?"
    then
        rm -f /tmp/prerelease.version
        unset PRERELEASE_VERSION
    else
        if grep -q beta /tmp/prerelease.version
        then
            NCREPO="https://download.nextcloud.com/server/prereleases"
            NCVERSION=$(curl -s -m 900 $NCREPO/ | sed --silent 's/.*href="nextcloud-\([^"]\+\).zip.asc".*/\1/p' | sort --version-sort | tail -1)
            STABLEVERSION="nextcloud-$NCVERSION"
            rm -f /tmp/prerelease.version
        elif grep -q RC /tmp/prerelease.version
        then
            NCREPO="https://download.nextcloud.com/server/prereleases"
            NCVERSION=$(cat /tmp/prerelease.version)
            STABLEVERSION="nextcloud-$NCVERSION"
            rm -f /tmp/prerelease.version
        fi
    fi
fi

# Rename snapshot
if [ -n "$SNAPSHOT_EXISTS" ]
then
    check_command lvrename /dev/ubuntu-vg/NcVM-snapshot-pending /dev/ubuntu-vg/NcVM-snapshot
fi

# Major versions unsupported
if [[ "${CURRENTVERSION%%.*}" -le "$NCBAD" ]]
then
    msg_box "Please note that updates between multiple major versions are unsupported! Your situation is:
Current version: $CURRENTVERSION
Latest release: $NCVERSION

It is best to keep your Nextcloud server upgraded regularly, and to install all point releases
and major releases, as skipping releases increases the risk of errors. Major releases are 
16, 17, 18 and 19. Point releases are intermediate releases for each major release. 
For example, 18.0.5 and 19.0.2 are point releases.

You can read more about Nextcloud releases here: https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule

Please contact T&M Hansson IT AB to help you with upgrading between major versions.
https://shop.hanssonit.se/product/upgrade-between-major-owncloud-nextcloud-versions/"
    exit 1
fi

# Check if new version is larger than current version installed. Skip version check if you want to upgrade to a prerelease.
if [ -z "$PRERELEASE_VERSION" ]
then
    print_text_in_color "$ICyan" "Checking for new Nextcloud version..."
    if version_gt "$NCVERSION" "$CURRENTVERSION"
    then
        print_text_in_color "$ICyan" "Latest release is: $NCVERSION. Current version is: $CURRENTVERSION."
        print_text_in_color "$IGreen" "New version available, upgrade continues!"
    else
        print_text_in_color "$IGreen" "You already run the latest version! ($CURRENTVERSION)"
        exit 0
    fi
fi

# Update updatenotification.sh
if [ -f $SCRIPTS/updatenotification.sh ]
then
    download_script STATIC updatenotification
    chmod +x $SCRIPTS/updatenotification.sh
fi

############# Don't upgrade to specific version
DONOTUPDATETO='20.0.6'
if [[ "$NCVERSION" == "$DONOTUPDATETO" ]]
then
    msg_box "Due to serious bugs with Nextcloud $DONOTUPDATETO we won't upgrade to that version."
    exit
fi

# Check if PHP version is compatible with $NCVERSION
PHP_VER=71
NC_VER=16
if [ "${NCVERSION%%.*}" -ge "$NC_VER" ]
then
    if [ "$(php -v | head -n 1 | cut -d " " -f 2 | cut -c 1,3)" -lt "$PHP_VER" ]
    then
        msg_box "Your PHP version isn't compatible with the new version of Nextcloud. Please upgrade your PHP stack and try again.

If you need support, please visit https://shop.hanssonit.se/product/upgrade-php-version-including-dependencies/"
        exit
    fi
fi

# Check if PHP version is compatible with $NCVERSION
PHP_VER=72
NC_VER=20
if [ "${NCVERSION%%.*}" -ge "$NC_VER" ]
then
    if [ "$(php -v | head -n 1 | cut -d " " -f 2 | cut -c 1,3)" -lt "$PHP_VER" ]
    then
        msg_box "Your PHP version isn't compatible with the new version of Nextcloud. Please upgrade your PHP stack and try again.

If you need support, please visit https://shop.hanssonit.se/product/upgrade-php-version-including-dependencies/"
        exit
    fi
fi

# Check if PHP version is compatible with $NCVERSION
PHP_VER=73
NC_VER=21
if [ "${NCVERSION%%.*}" -ge "$NC_VER" ]
then
    if [ "$(php -v | head -n 1 | cut -d " " -f 2 | cut -c 1,3)" -lt "$PHP_VER" ]
    then
msg_box "Your PHP version isn't compatible with the new version of Nextcloud. Please upgrade your PHP stack and try again.

If you need support, please visit https://shop.hanssonit.se/product/upgrade-php-version-including-dependencies/"
        exit
    fi
fi

# Upgrade Nextcloud
if ! site_200 $NCREPO
then
    msg_box "$NCREPO seems to be down, or temporarily not reachable. Please try again in a few minutes."
    exit 1
fi

countdown "Backing up files and upgrading to Nextcloud $NCVERSION in 10 seconds... Press CTRL+C to abort." "10"

# Rename snapshot
if [ -n "$SNAPSHOT_EXISTS" ]
then
    check_command lvrename /dev/ubuntu-vg/NcVM-snapshot /dev/ubuntu-vg/NcVM-snapshot-pending
fi

# Backup app status
# Fixing https://github.com/nextcloud/server/issues/4538
print_text_in_color "$ICyan" "Getting and backing up the status of apps for later, this might take a while..."
NC_APPS="$(nextcloud_occ app:list | awk '{print$2}' | tr -d ':' | sed '/^$/d')"
if [ -z "$NC_APPS" ]
then
    print_text_in_color "$IRed" "No apps detected, aborting export of app status... Please report this issue to $ISSUES"
    APPSTORAGE="no-export-done"
else
    declare -Ag APPSTORAGE
    for app in $NC_APPS
    do
        APPSTORAGE[$app]=$(nextcloud_occ_no_check config:app:get "$app" enabled)
    done
fi

# Stop Apache2
check_command systemctl stop apache2.service

# Create backup dir (/mnt/NCBACKUP/)
if [ ! -d "$BACKUP" ]
then
    mkdir -p $BACKUP
fi

# Backup PostgreSQL
if is_this_installed postgresql-common
then
    cd /tmp
    if sudo -u postgres psql -c "SELECT 1 AS result FROM pg_database WHERE datname='$NCCONFIGDB'" | grep "1 row" > /dev/null
    then
        print_text_in_color "$ICyan" "Doing pgdump of $NCCONFIGDB..."
        check_command sudo -u postgres pg_dump "$NCCONFIGDB"  > "$BACKUP"/nextclouddb.sql
    else
        print_text_in_color "$ICyan" "Doing pgdump of all databases..."
        check_command sudo -u postgres pg_dumpall > "$BACKUP"/alldatabases.sql
    fi
fi

# Prevent apps from breaking the update due to incompatibility
# Fixes errors like https://github.com/nextcloud/vm/issues/1834
# Needs to be executed before backing up the config directory
if [ "${CURRENTVERSION%%.*}" -lt "${NCVERSION%%.*}" ]
then
    print_text_in_color "$ICyan" "Deleting 'app_install_overwrite array' to prevent app breakage..."
    nextcloud_occ config:system:delete app_install_overwrite
fi

# Move backups to location according to $VAR
if [ -d /var/NCBACKUP/ ]
then
    mv /var/NCBACKUP "$BACKUP"
    mv /var/NCBACKUP-OLD "$BACKUP"-OLD/
fi

# Check if backup exists and move to old
print_text_in_color "$ICyan" "Backing up data..."
if [ -d "$BACKUP" ]
then
    install_if_not rsync
    mkdir -p "$BACKUP"-OLD/"$(date +%Y-%m-%d-%H%M%S)"
    rsync -Aaxz "$BACKUP"/* "$BACKUP"-OLD/"$(date +%Y-%m-%d-%H%M%S)"
    rm -rf "$BACKUP"-OLD/"$(date --date='1 year ago' +%Y)"*
    rm -rf "$BACKUP"
    mkdir -p "$BACKUP"
fi

# Do a backup of the ZFS mount
if is_this_installed zfs-auto-snapshot
then
    if grep -rq ncdata /etc/mtab
    then
        check_multiverse
        sed -i "s|date --utc|date|g" /usr/sbin/zfs-auto-snapshot
        check_command zfs-auto-snapshot -r ncdata
    fi
fi  
   
# Backup data
for folders in config apps
do
    if [[ "$(rsync -Aaxz $NCPATH/$folders $BACKUP)" -eq 0 ]]
    then
        BACKUP_OK=1
    else
        unset BACKUP_OK
    fi
done

if [ -z $BACKUP_OK ]
then
    msg_box "Backup was not OK. Please check $BACKUP and see if the folders are backed up properly"
    exit 1
else
    printf "${IGreen}\nBackup OK!${Color_Off}\n"
fi

# Download and validate Nextcloud package
check_command download_verify_nextcloud_stable

if [ -f "$HTML/$STABLEVERSION.tar.bz2" ]
then
    print_text_in_color "$ICyan" "$HTML/$STABLEVERSION.tar.bz2 exists"
else
    msg_box "Aborting, something went wrong with the download"
    exit 1
fi

if [ -d $BACKUP/config/ ]
then
    print_text_in_color "$ICyan" "$BACKUP/config/ exists"
else
    msg_box "Something went wrong with backing up your old Nextcloud instance
Please check in $BACKUP if config/ folder exist."
    exit 1
fi

if [ -d $BACKUP/apps/ ]
then
    print_text_in_color "$ICyan" "$BACKUP/apps/ exists"
    echo 
    print_text_in_color "$IGreen" "All files are backed up."
    send_mail \
    "Nextcloud update started!" \
    "Please don't shutdown or reboot your server during the update! $(date +%T)"
    nextcloud_occ maintenance:mode --on
    countdown "Removing old Nextcloud instance in 5 seconds..." "5"
    rm -rf $NCPATH
    print_text_in_color "$IGreen" "Extracting new package...."
    check_command tar -xjf "$HTML/$STABLEVERSION.tar.bz2" -C "$HTML"
    rm "$HTML/$STABLEVERSION.tar.bz2"
    print_text_in_color "$IGreen" "Restoring config to Nextcloud..."
    rsync -Aaxz $BACKUP/config "$NCPATH"/
    bash $SECURE & spinner_loading
    nextcloud_occ maintenance:mode --off
    nextcloud_occ upgrade
    # Optimize
    print_text_in_color "$ICyan" "Optimizing Nextcloud..."
    yes | nextcloud_occ db:convert-filecache-bigint
    nextcloud_occ db:add-missing-indices
    CURRENTVERSION=$(sudo -u www-data php $NCPATH/occ status | grep "versionstring" | awk '{print $3}')
    if [ "${CURRENTVERSION%%.*}" -ge "19" ]
    then
        check_php
        nextcloud_occ db:add-missing-columns
        install_if_not php"$PHPVER"-bcmath
    fi
    if [ "${CURRENTVERSION%%.*}" -ge "20" ]
    then
        nextcloud_occ db:add-missing-primary-keys
    fi
    if [ "${CURRENTVERSION%%.*}" -ge "21" ]
    then
        # Set phone region
        if [ -n "$KEYBOARD_LAYOUT" ]
        then
            nextcloud_occ config:system:set default_phone_region --value="$KEYBOARD_LAYOUT"
        fi
    fi
else
    msg_box "Something went wrong with backing up your old Nextcloud instance
Please check in $BACKUP if the folders exist."
    exit 1
fi

# Update Bitwarden
if is_docker_running
then
    if docker ps -a --format '{{.Names}}' | grep -Eq "bitwarden";
    then
        if is_this_installed apache2
        then
            if [ -d /root/bwdata ]
            then
                curl_to_dir "https://raw.githubusercontent.com/bitwarden/server/master/scripts" "bitwarden.sh" "/root"
                chmod +x /root/bitwarden.sh
                if [ -f /root/bitwarden.sh ]
                then
                    print_text_in_color "$IGreen" "Upgrading Bitwarden..."
                    sleep 2
                    yes no | bash /root/bitwarden.sh updateself
                    yes no | bash /root/bitwarden.sh update
                fi
            elif [ -d "$BITWARDEN_HOME"/bwdata ]
            then
                curl_to_dir "https://raw.githubusercontent.com/bitwarden/server/master/scripts" "bitwarden.sh" "$BITWARDEN_HOME"
                chown "$BITWARDEN_USER":"$BITWARDEN_USER" "$BITWARDEN_HOME"/bitwarden.sh
                chmod +x "$BITWARDEN_HOME"/bitwarden.sh
                if [ -f "$BITWARDEN_HOME"/bitwarden.sh ]
                then
                    print_text_in_color "$IGreen" "Upgrading Bitwarden..."
                    sleep 2
                    yes no | sudo -u "$BITWARDEN_USER" bash "$BITWARDEN_HOME"/bitwarden.sh updateself
                    yes no | sudo -u "$BITWARDEN_USER" bash "$BITWARDEN_HOME"/bitwarden.sh update
                fi
            fi
        fi
    fi
fi

# Start Apache2
start_if_stopped apache2

# Just double check if the DB is started as well
if is_this_installed postgresql-common
then
    if ! pgrep postgres >/dev/null 2>&1
    then
        print_text_in_color "$ICyan" "Starting PostgreSQL..."
        systemctl start postgresql.service
    fi
fi

# Restore app status
# Fixing https://github.com/nextcloud/server/issues/4538
if [ "${APPSTORAGE[0]}" != "no-export-done" ]
then
    print_text_in_color "$ICyan" "Restoring the status of apps. This can take a while..."
    for app in "${!APPSTORAGE[@]}"
    do
        if [ -n "${APPSTORAGE[$app]}" ]
        then
            # Check if the app is in Nextclouds app storage
            if ! [ -d "$NC_APPS_PATH/$app" ]
            then
                # If the app is missing from the apps folder and was installed and enabled before the upgrade was done,
                # then reinstall it
                if [ "${APPSTORAGE[$app]}" = "yes" ]
                then
                    install_and_enable_app "$app"
                # If the app is missing from the apps folder and was installed but not enabled before the upgrade was done, 
                # then reinstall it but keep it disabled
                elif [ "${APPSTORAGE[$app]}" = "no" ]
                then
                    install_and_enable_app "$app"
                    nextcloud_occ_no_check app:disable "$app"
                fi
            fi
            # If the app still isn't enabled (maybe because it's incompatible), then at least restore from backup,
            # and make sure it's disabled
            if ! [ -d "$NC_APPS_PATH/$app" ] && [ -d "$BACKUP/apps/$app" ]
            then
                if yesno_box_no "$app couln't be enabled. Do you want to restore it from backup?\n\nWARNING: It may result in failed integrity checks."
                then
                    print_text_in_color "$ICyan" "Restoring $app from $BACKUP/apps..."
                    rsync -Aaxz "$BACKUP/apps/$app" "$NC_APPS_PATH/"
                    bash "$SECURE"
                    nextcloud_occ_no_check app:disable "$app"
                    nextcloud_occ upgrade
                fi
            fi
            # Cover the case where the app is enabled for certain groups
            if [ "${APPSTORAGE[$app]}" != "yes" ] && [ "${APPSTORAGE[$app]}" != "no" ] && is_app_enabled "$app"
            then
                # Only restore the group settings, if the app was enabled (and is thus compatible with the new NC version)
                nextcloud_occ_no_check config:app:set "$app" enabled --value="${APPSTORAGE[$app]}"
            fi
        fi
    done
fi

# Remove header for Nextcloud 14 (already in .htaccess)
if [ -f /etc/apache2/sites-available/"$(hostname -f)".conf ]
then
    if grep -q 'Header always set Referrer-Policy' /etc/apache2/sites-available/"$(hostname -f)".conf
    then
        sed -i '/Header always set Referrer-Policy/d' /etc/apache2/sites-available/"$(hostname -f)".conf
        restart_webserver
    fi
fi

# Fix crontab every 5 minutes instead of 15
if crontab -u www-data -l | grep -q "\*/15  \*  \*  \*  \* php -f $NCPATH/cron.php"
then
    crontab -u www-data -l | grep -v "php -f $NCPATH/cron.php" | crontab -u www-data -
    crontab -u www-data -l | { cat; echo "*/5  *  *  *  * php -f $NCPATH/cron.php > /dev/null 2>&1"; } | crontab -u www-data -
    print_text_in_color "$ICyan" "Nextcloud crontab updated to run every 5 minutes."
fi

# Change owner of $BACKUP folder to root
chown -R root:root "$BACKUP"

# Pretty URLs
print_text_in_color "$ICyan" "Setting RewriteBase to \"/\" in config.php..."
chown -R www-data:www-data "$NCPATH"
nextcloud_occ config:system:set htaccess.RewriteBase --value="/"
nextcloud_occ maintenance:update:htaccess
bash $SECURE & spinner_loading

# Repair
nextcloud_occ maintenance:repair

# Create $VMLOGS dir
if [ ! -d "$VMLOGS" ]
then
    mkdir -p "$VMLOGS"
fi

CURRENTVERSION_after=$(nextcloud_occ status | grep "versionstring" | awk '{print $3}')
if [[ "$NCVERSION" == "$CURRENTVERSION_after" ]] || [ -n "$PRERELEASE_VERSION" ]
then
    msg_box "Latest version is: $NCVERSION. Current version is: $CURRENTVERSION_after.

||| UPGRADE SUCCESS! |||

If you notice that some apps are disabled, it's because they are not compatible with the new Nextcloud version.
To recover your old apps, please check $BACKUP/apps and copy them to $NCPATH/apps manually.

Thank you for using T&M Hansson IT's updater!"
    nextcloud_occ status
    nextcloud_occ maintenance:mode --off
    # Restart notify push if existing
    if [ -f "$NOTIFY_PUSH_SERVICE_PATH" ]
    then
        systemctl restart notify_push
    fi
    print_text_in_color "$ICyan" "Sending notification about the successful update to all admins..."
    notify_admin_gui \
    "Nextcloud is now updated!" \
    "Your Nextcloud is updated to $CURRENTVERSION_after with the update script in the Nextcloud VM."
    mkdir -p "$VMLOGS"/updates
    rm -f "$VMLOGS"/update.log # old place
    echo "NEXTCLOUD UPDATE success-$(date +"%Y%m%d")" >> "$VMLOGS"/updates/update.log
    # Remove logs from last year to save space
    rm -f "$VMLOGS"/updates/update-"$(date --date='1 year ago' +%Y)"*
    if [ -n "$SNAPSHOT_EXISTS" ]
    then
        check_command lvrename /dev/ubuntu-vg/NcVM-snapshot-pending /dev/ubuntu-vg/NcVM-snapshot
    fi
    exit 0
else
    msg_box "Latest version is: $NCVERSION. Current version is: $CURRENTVERSION_after.

||| UPGRADE FAILED! |||

No worries, your files are still backed up at $BACKUP!
Please report this issue to $ISSUES

Maintenance mode is kept on."
    notify_admin_gui \
    "Nextcloud update failed!" \
    "Your Nextcloud update failed, please check the logs at $VMLOGS/update.log"
    nextcloud_occ status
    if [ -n "$SNAPSHOT_EXISTS" ]
    then
        # Kill all "$SCRIPTS/update.sh" processes to make sure that no automatic restart happens after exiting this script
        # shellcheck disable=2009
        PROCESS_IDS_NEW=$(ps aux | grep "$SCRIPTS/update.sh" | grep -v grep | awk '{print $2}')
        if [ -n "$PROCESS_IDS_NEW" ]
        then
            mapfile -t PROCESS_IDS_NEW <<< "$PROCESS_IDS_NEW"
            for process in "${PROCESS_IDS_NEW[@]}"
            do
                print_text_in_color "$ICyan" "Killing the process with PID $process to prevent a potential automatic restart..."
                if ! kill "$process"
                then
                    print_text_in_color "$IRed" "Couldn't kill the process with PID $process..."
                fi
            done
        fi
    fi
    exit 1
fi