#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
user_home=$YNH_APP_ARG_USER_HOME
is_public=$YNH_APP_ARG_IS_PUBLIC
phpversion=$YNH_PHP_VERSION

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

final_path=/var/www/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

# Check machine architecture (Nextcloud will soon deprecate 32-bit support)
if [ $YNH_ARCH == "i386" ] || [ $YNH_ARCH == "armhf" ]
then
    ynh_print_warn --message="Nextcloud will soon deprecate 32-bit support. It is recommended to upgrade to a 64-bit architecture."
fi

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin
ynh_app_setting_set --app=$app --key=user_home --value=$user_home

maintenance_mode=0
ynh_app_setting_set --app=$app --key=maintenance_mode --value=$maintenance_mode

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=10

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE A MYSQL DATABASE
#=================================================
ynh_script_progression --message="Creating a MySQL database..." --weight=2

db_name=$(ynh_sanitize_dbid --db_name=$app)
db_user=$db_name
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name

ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name \
    <<< "ALTER DATABASE $db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..."

# Load the last available version
source upgrade.d/upgrade.last.sh

# Create an app.src for the last version of nextcloud
cat > ../conf/app.src << EOF
SOURCE_URL=https://download.nextcloud.com/server/releases/nextcloud-$next_version.tar.bz2
SOURCE_SUM=$nextcloud_source_sha256
SOURCE_SUM_PRG=sha256sum
SOURCE_FORMAT=tar.bz2
SOURCE_IN_SUBDIR=true
EOF

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Enable YunoHost patches on Nextcloud sources
cp -a ../sources/patches_last_version/* ../sources/patches
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=3

# Create a system user
ynh_system_user_create --username=$app

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring PHP-FPM..." --weight=50

fpm_footprint="high"
fpm_free_footprint=0
fpm_usage="medium"

ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
ynh_app_setting_set --app=$app --key=fpm_free_footprint --value=$fpm_free_footprint
ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage

# Create a dedicated php-fpm config
ynh_add_fpm_config --usage=$fpm_usage --footprint=$fpm_footprint --phpversion=$YNH_PHP_VERSION
# Used by ynh_add_nginx_config
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=2

# Check if .well-known is available for this domain
if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
then
    ynh_print_warn --message="Another app already uses the domain $domain to serve a caldav/carddav feature. You may encounter issues when dealing with your calendar or address book."

    # Remove lines about .well-known/carddav and caldav with sed.
    sed --in-place --regexp-extended '/location = \/\.well\-known\/(caldav|carddav)/d' "../conf/nginx.conf"
fi

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC SETUP
#=================================================
# CREATE THE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating a data directory..." --weight=1

# Define app's data directory
datadir="/home/yunohost.app/$app/data"
ynh_app_setting_set --app=$app --key=datadir --value=$datadir

# Create app folders
mkdir -p "$datadir"

#=================================================
# INSTALL NEXTCLOUD
#=================================================
ynh_script_progression --message="Installing Nextcloud..." --weight=30

# Define a function to execute commands with `occ`
exec_occ() {
  (cd "$final_path" && ynh_exec_as "$app" \
      php${phpversion} --define apc.enable_cli=1 occ --no-interaction --no-ansi "$@")
}

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

# Define password in an intermediate var
# The fact that it's called _password allows it to be
# picked up by Yunohost's auto-redact mecanism
admin_password="$(ynh_string_random --length=6)"

# Install Nextcloud using a temporary admin user
exec_occ maintenance:install \
    --database "mysql" --database-name $db_name \
    --database-user $db_user --database-pass "$db_pwd" \
    --admin-user "admin" --admin-pass "$admin_password" \
    --data-dir "$datadir" \
    || ynh_die --message="Unable to install Nextcloud"

#=================================================
# CONFIGURE NEXTCLOUD
#=================================================
ynh_script_progression --message="Configuring Nextcloud..." --weight=8

# Set the mysql.utf8mb4 config to true in config.php
exec_occ config:system:set mysql.utf8mb4 --type boolean --value="true"

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

# Enable LDAP plugin
exec_occ app:enable user_ldap
exec_occ ldap:create-empty-config

# Load the installation config file in Nextcloud
nc_conf="$final_path/config_install.json"
ynh_add_config --template="../conf/config_install.json" --destination="$nc_conf"

exec_occ config:import "$nc_conf"

# Then remove the config file
ynh_secure_remove --file="$nc_conf"

# Load the additional config file (used also for upgrade)
nc_conf="$final_path/config.json"
ynh_add_config --template="../conf/config.json" --destination="$nc_conf"

exec_occ config:import "$nc_conf"

# Then remove the config file
ynh_secure_remove --file="$nc_conf"

#=================================================
# CHECK THE LDAP CONFIG
#=================================================

# Check LDAP configuration to see if everything worked well
exec_occ ldap:test-config '' \
  || ynh_die --message="An error occured during LDAP configuration"

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

# Define a function to add an external storage
# Create the external storage for the given folders and enable sharing
create_external_storage() {
  local datadir="$1"
  local mount_name="$2"
  local mount_id=`exec_occ files_external:create --output=json \
      "$mount_name" 'local' 'null::null' -c "datadir=$datadir" || true`
  ! [[ $mount_id =~ ^[0-9]+$ ]] \
      && ynh_print_warn --message="Unable to create external storage" \
      || exec_occ files_external:option "$mount_id" enable_sharing true
}

# Enable External Storage and create local mount to home folder
if [ $user_home -eq 1 ]
then
    exec_occ app:enable files_external
    create_external_storage "/home/\$user" "Home"
    # Iterate over users to extend their home folder permissions
    for u in $(ynh_user_list); do
        setfacl --modify g:$app:rwx "/home/$u" || true
    done
fi

#=================================================
# 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"

#=================================================
# CHANGE HOSTNAME FOR ACTIVITY NOTIFICATIONS
#=================================================

exec_occ config:system:set overwrite.cli.url --value="https://${domain}"

#=================================================
# REMOVE THE TEMPORARY ADMIN AND SET THE TRUE ONE
#=================================================

# Set the user as admin
ynh_mysql_connect_as --user=$db_name --password="$db_pwd" --database=$db_name --default_character_set="utf8mb4" \
    <<< "INSERT INTO oc_group_user VALUES ('admin','$admin');"
# And delete admin user
exec_occ user:delete admin

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

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

#=================================================
# ADD A CRON JOB
#=================================================

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

exec_occ background:cron

#=================================================
# POST-INSTALL MAINTENANCE
#=================================================

exec_occ db:add-missing-indices
exec_occ db:add-missing-columns
exec_occ db:convert-filecache-bigint -n

#=================================================
# YUNOHOST MULTIMEDIA INTEGRATION
#=================================================
ynh_script_progression --message="Adding multimedia directories..." --weight=6

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

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..."

# Use logrotate to manage application logfile(s)
ynh_use_logrotate --logfile="$datadir/nextcloud.log"

#=================================================
# SETUP FAIL2BAN
#=================================================
ynh_script_progression --message="Configuring Fail2Ban..." --weight=8

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/home/yunohost.app/$app/data/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
  ynh_permission_update --permission="main" --add="visitors"
fi

ynh_permission_create --permission="api" --label="api" --url="re:$domain\/.well-known\/.*" --allowed="visitors" "all_users" --auth_header="false" --show_tile="false" --protected="true"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

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