#!/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 $app admin)
final_path=$(ynh_app_setting_get $app final_path)
db_name=$(ynh_app_setting_get $app db_name)
user_home=$(ynh_app_setting_get $app user_home)

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

# If db_name doesn't exist, create it
if [ -z $db_name ]; then
	db_name=$(ynh_sanitize_dbid $app)
	ynh_app_setting_set $app db_name $db_name
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

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

# Made a backup only after the version 11.0.0
# Before, the datas will be always saved.

# Get the current version number of nextcloud/owncloud
current_version=$(grep OC_VersionString "$final_path/version.php" | cut -d\' -f2)
current_major_version=${current_version%%.*}

if [ $current_major_version -gt 11 ]
then
    # Inform the backup/restore process that it should not save the data directory
    ynh_app_setting_set $app backup_core_only 1

    # Backup the current version of the app
    ynh_backup_before_upgrade
    ynh_clean_setup () {
	# Remove the post migration script before its execution !
	ynh_secure_remove "/tmp/owncloud_post_migration.sh" 2>&1

	# restore it if the upgrade fails
	ynh_restore_upgradebackup
    }
fi

# Exit if an error occurs during the script execution
ynh_abort_if_errors

#=================================================
# HANDLE MIGRATION FROM OWNCLOUD
#=================================================

ynh_handle_app_migration "owncloud" "owncloud_migration"
if [ $migration_process -eq 1 ]
then
    # If a migration has been perform
    # Reload some values changed by the migration process
    final_path=$(ynh_app_setting_get $app final_path)
    db_name=$(ynh_app_setting_get $app db_name)

    # Remove the old fake package for owncloud.
    # Its name is specific, so the migration process can't remove it
    ynh_package_autopurge owncloud-deps

    # Change the database access in the config
    ynh_replace_string "\('dbname' =>\).*" "\1 '$db_name'," "$final_path/config/config.php"
    ynh_replace_string "\('dbuser' =>\).*" "\1 '$db_name'," "$final_path/config/config.php"

    # Change the path of the data directory
    ynh_replace_string "\('dbuser' =>\).*" "\1 '$db_name'," "$final_path/config/config.php"
    ynh_replace_string "\('datadirectory' =>.*\)$old_app" "\1$app" "$final_path/config/config.php"
fi

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path $path_url)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# NGINX CONFIGURATION
#=================================================

# Delete current nginx configuration to be able to check if .well-known is already served.
ynh_remove_nginx_config
ynh_app_setting_delete $app "checksum__etc_nginx_conf.d_$domain.d_$app.conf" || true
# Do not serve .well-known if it's already served on the domain
if is_url_handled "https://${domain}/.well-known/caldav" ; then
    sed -ri '/^location = \/\.well\-known\/(caldav|carddav) \{/,/\}/d' \
	"../conf/nginx.conf"
fi

# Handle root path, avoid double slash.
# Temporary fix, in waiting for an upgrade of the helper. (#361)
path_url_slash_less=${path_url%/}
ynh_replace_string "__PATH__/" "$path_url_slash_less/" "../conf/nginx.conf"

# 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

#=================================================
# UPGRADE DEPENDENCIES
#=================================================

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MAKE SEQUENTIAL UPGRADES FROM EACH MAJOR
# VERSION TO THE NEXT ONE
#=================================================

# Load the last available version
source upgrade.d/upgrade.last.sh
last_version=$next_version

# Define app's data directory
datadir="/home/yunohost.app/${app}/data"

# Set write access for the following commands
chown -R $app: "$final_path" "$datadir"

# Print the current version number of nextcloud
exec_occ -V

# While the current version is not the last version, do an upgrade
while [ "$last_version" != "$current_version" ]
do

    # The major version is the first part of the version number
    # major_version=${next_version%%.*}
    major_version=${last_version%%.*}
    current_major_version=${current_version%%.*}

    # If the current version has the same major version than the next one,
    # then it's the last upgrade to do
    if [ "$major_version" -eq "$current_major_version" ]; then
      current_major_version=last
      # Execute the commands dedicated to the last upgrade
      last_upgrade_operations
    fi

    # Load the value for this version
    source upgrade.d/upgrade.$current_major_version.sh

    echo -e "\nUpgrade to nextcloud $next_version" >&2

    # Create an app.src for this version of nextcloud
    cp ../conf/app.src.default ../conf/app.src
    ynh_replace_string "__VERSION__" "$next_version" "../conf/app.src"
    ynh_replace_string "__SHA256_SUM__" "$nextcloud_source_sha256" "../conf/app.src"

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

    # Install the next nextcloud version in $tmpdir
    ynh_setup_source "$tmpdir"

    # Enable maintenance mode
    exec_occ maintenance:mode --on

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

    # Backup 3rd party applications from the current nextcloud
    # But do not overwrite if there is any upgrade
    # (apps directory already exists in Nextcloud archive)
    cp -a --update "$final_path/apps" "$tmpdir"

    # Replace the old nextcloud by the new one
    ynh_secure_remove "$final_path"
    mv "$tmpdir" "$final_path"

    # Set write access for the following commands
    chown -R $app: "$final_path" "$datadir"

    # Upgrade Nextcloud (SUCCESS = 0, UP_TO_DATE = 3)
    exec_occ maintenance:mode --off
    exec_occ upgrade \
      || ([[ $? -eq 3 ]] || ynh_die "Unable to upgrade Nextcloud")

    # Get the new current version number
    current_version=$(grep OC_VersionString "$final_path/version.php" | cut -d\' -f2)
    current_major_version=${current_version%%.*}

    # Print the current version number of nextcloud
    exec_occ -V
done

#=================================================
# CONFIGURE NEXTCLOUD
#=================================================

# Verify the checksum and backup the file if it's different
ynh_backup_if_checksum_is_different "${final_path}/config/config.php"

nc_conf="${final_path}/config.json"
cp ../conf/config.json "$nc_conf"
ynh_replace_string "#DOMAIN#" "$domain" "$nc_conf"
ynh_replace_string "#DATADIR#" "$datadir" "$nc_conf"

# Ensure that UpdateNotification app is disabled
exec_occ app:disable updatenotification

# Enable plugins
exec_occ app:enable user_ldap

# Load the config file in nextcloud
exec_occ config:import "$nc_conf"
# Then remove it
rm -f "$nc_conf"

#=================================================
# ALLOW USERS TO DISCONNECT FROM NEXTCLOUD
#=================================================

# Add dynamic logout URL to the config
exec_occ config:system:get logout_url >/dev/null 2>&1 \
  || echo "
//-YunoHost-
// set logout_url according to main domain
\$main_domain = exec('cat /etc/yunohost/current_host');
\$CONFIG['logout_url'] = 'https://'.\$main_domain.'/yunohost/sso/?action=logout';
//-YunoHost-
" >> "${final_path}/config/config.php"

#=================================================
# MOUNT HOME FOLDERS AS EXTERNAL STORAGE
#=================================================

# Enable External Storage and create local mount to home folder as needed
if [ $user_home -eq 1 ]; then
    exec_occ app:enable files_external
    exec_occ files_external:list --output=json \
	| grep -q '"storage":"\\\\OC\\\\Files\\\\Storage\\\\Local"' \
	|| create_external_storage "/home/\$user" "Home"
    # Iterate over users to extend their home folder permissions
    for u in $(ynh_user_list); do
      setfacl -m g:$app:rwx "/home/$u" || true
    done
fi

#=================================================
# STORE THE CHECKSUM OF THE CONFIG FILE
#=================================================

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum "${final_path}/config/config.php"

#=================================================
# UPDATE THE CRON JOB
#=================================================

cron_path="/etc/cron.d/$app"
cp -a ../conf/nextcloud.cron "$cron_path"
chown root: "$cron_path"
chmod 644 "$cron_path"

ynh_replace_string "#USER#" "$app" "$cron_path"
ynh_replace_string "#DESTDIR#" "$final_path" "$cron_path"

exec_occ background:cron

#=================================================
# UPDATE THE HOOK FILE FOR USER CREATE
#=================================================

# Set system group in hooks
ynh_replace_string "#GROUP#" "$app" ../hooks/post_user_create

#=================================================
# YUNOHOST MULTIMEDIA INTEGRATION
#=================================================

# Build YunoHost multimedia directories
ynh_multimedia_build_main_dir
# Mount the user directory in Nextcloud
exec_occ app:enable files_external
create_external_storage "/home/yunohost.multimedia/\$user" "Multimedia"
create_external_storage "/home/yunohost.multimedia/share" "Shared multimedia"
# Allow nextcloud to write into these directories
ynh_multimedia_addaccess $app

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

# Fix app ownerships & permissions
chown -R $app: "$final_path" "$datadir"
find ${final_path}/ -type f -print0 | xargs -0 chmod 0644
find ${final_path}/ -type d -print0 | xargs -0 chmod 0755
find ${datadir}/ -type f -print0 | xargs -0 chmod 0640
find ${datadir}/ -type d -print0 | xargs -0 chmod 0750
chmod 640 "${final_path}/config/config.php"
chmod 755 /home/yunohost.app

#=================================================
# WARNING ABOUT THIRD-PARTY APPS
#=================================================

# Warn about possible disabled apps
echo "Note that if you've installed some third-parties Nextcloud applications, \
they are probably disabled and you'll have to manually enable them again." >&2

#=================================================
# SETUP LOGROTATE
#=================================================

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP SSOWAT
#=================================================

ynh_app_setting_set $app unprotected_uris "/"
ynh_app_setting_set $app skipped_regex \
    "$(sed 's/[\.\-]/\%&/g' <<< $domain)/%.well%-known/.*"

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

systemctl reload nginx

#=================================================
# FINISH MIGRATION PROCESS
#=================================================

if [ $migration_process -eq 1 ]
then
    echo "ownCloud has been successfully migrated to Nextcloud! \
A last scheduled operation will run in a couple of minutes to finish the \
migration in YunoHost side. Do not proceed any application operation while \
you don't see Nextcloud as installed." >&2

    # Execute a post migration script after the end of this upgrade.
    # Mainly for some cleaning
    script_post_migration=owncloud_post_migration.sh
    ynh_replace_string "__OLD_APP__" "$old_app" ../conf/$script_post_migration
    ynh_replace_string "__NEW_APP__" "$app" ../conf/$script_post_migration
    cp ../conf/$script_post_migration /tmp
    chmod +x /tmp/$script_post_migration
    (cd /tmp; echo "/tmp/$script_post_migration > /tmp/$script_post_migration.log 2>&1" | at now + 2 minutes)
fi