#!/bin/bash
shopt -s extglob  # sets extended pattern matching options in the bash shell

# Exit on command errors and treat unset variables as an error
set -eu
#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

#=================================================
# LOAD SETTINGS
#=================================================
# Set app specific variables
app=$YNH_APP_INSTANCE_NAME

# Check destination directory
DESTDIR="/var/www/$app"
[[ ! -d $DESTDIR ]] && ynh_die \
"The destination directory '$DESTDIR' does not exist.\
 The app is not correctly installed, you should remove it first."

# Retrieve arguments
domain=$(ynh_app_setting_get "$app" domain)

path_url=$(ynh_app_setting_get "$app" path_url)
# Compatibility with previous version
if [ -z "$path_url" ] ; then
  path_url=$(ynh_app_setting_get "$app" path)
  ynh_app_setting_set $app path_url "$path_url"
fi
path_url=$(ynh_normalize_url_path $path_url)

final_path=$(ynh_app_setting_get "$app" final_path)
# Compatibility with previous version
if [ -z "$final_path" ] ; then
  final_path="/var/www/$app"
  ynh_app_setting_set $app final_path "$final_path"
fi

db_name=$(ynh_app_setting_get "$app" db_name)
# Compatibility with previous version
if [ -z "$db_name" ] ; then
  db_name=$app
  ynh_app_setting_set "$app" db_name "$db_name"
fi

db_user="$db_name"
db_pwd=$(ynh_app_setting_get "$app" mysqlpwd)
admin=$(ynh_app_setting_get "$app" admin)

admin_pwd=$(ynh_app_setting_get "$app" admin_pwd)
# Compatibility with previous version; password was not set
if [ -z "$admin_pwd" ] ; then
  # Generate a new password
  admin_pwd=$(ynh_string_random 24)
  
  # Compute password hash with the Piwigo function
  cp ../conf/hash_password.php $final_path
  hashed_password=$(cd $final_path ; php hash_password.php $admin_pwd)
  
  # Update password hash in database
  ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE users SET password='$hashed_password' WHERE username='$admin';"
  ynh_app_setting_set $app admin_pwd "$admin_pwd"
  
  # Remove the temporary hash generation script
  ynh_secure_remove "$final_path/hash_password.php"
fi

language=$(ynh_app_setting_get "$app" language)
if [ "$language" = "fr" ] ; then
  applanguage="fr_FR"
else
  applanguage="en_UK"
fi

is_public=$(ynh_app_setting_get "$app" is_public)

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

# Use prior backup and restore on error only if backup feature
# exists on installed instance
if [ -f "/etc/yunohost/apps/$app/scripts/backup" ] ; then
  ynh_backup_before_upgrade # Backup the current version of the app
  ynh_clean_setup () {
      ynh_restore_upgradebackup
  }
  ynh_abort_if_errors	# Stop script if an error is detected
fi

#=================================================
# INSTALL DEPENDENCIES
#=================================================

ynh_install_app_dependencies "$pkg_dependencies"

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

# Create tmp directory and fetch app inside
TMPDIR=$(ynh_mkdir_tmp)
ynh_setup_source "$TMPDIR"
# Fetch needed plugins
mkdir -p $TMPDIR/plugins/Ldap_Login
ynh_setup_source "$TMPDIR/plugins/Ldap_Login" ldap_plugin
ynh_setup_source "$TMPDIR/plugins" log_failed_logins_plugin

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

ynh_system_user_create $app # Create dedicated user if not existing

#=================================================
# SPECIFIC SETUP
#=================================================

# We store photos (potentially large data) on /home/yunohost.app
datapath=/home/yunohost.app/$app

# Backward compatibility:
# If the galleries subdirectory was moved,
# remove the link and overwrite it
# (this directory always includes only a single index.php file...)
if [ -h $final_path/galleries ] ; then
  rm -f $final_path/galleries # only a symbolic link, ynh_secure_remove can't handle that
  ynh_secure_remove $datapath/galleries
fi

# Install files and set permissions
cp -a $TMPDIR/!(upload|_data) $final_path


# Backward compatibility:
# If the _data subdirectory wasn't already moved to /home/yunohost.app/$app,
# then move it there
if [ ! -h $final_path/_data ] ; then
  mv $final_path/_data $datapath
  ln -sd $datapath/_data $final_path/_data
fi


chown -R $app: $final_path
chown -R $app: $datapath
chmod 755 -R $final_path/_data

#=================================================
# NGINX AND PHP-FPM CONFIGURATION
#=================================================

ynh_add_nginx_config
ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"

# Copy and set php-fpm configuration
ynh_add_fpm_config

#=================================================
# CONFIGURE PIWIGO
#=================================================

ynh_app_setting_set "$app" unprotected_uris "/"
yunohost app ssowatconf

# Configure piwigo via curl
ynh_local_curl "/upgrade.php?language=$applanguage&now=true" "language=$applanguage" "username=$admin" "password=$admin_pwd"

# Make a backup of the original config file if modified
ynh_backup_if_checksum_is_different "$final_path/local/config/config.inc.php"
# Change local config
cp ../conf/config.inc.php $final_path/local/config/
# Calculate and store the config file checksum
ynh_store_file_checksum "$final_path/local/config/config.inc.php"

# Make a backup of the original database config file if modified
ynh_backup_if_checksum_is_different "$final_path/local/config/database.inc.php"
# Setup database in local/config/database.inc.php
ynh_replace_string "DBTOCHANGE" "$db_name" ../conf/database.inc.php
ynh_replace_string "USERTOCHANGE" "$db_user" ../conf/database.inc.php
ynh_replace_string "PASSTOCHANGE" "$db_pwd" ../conf/database.inc.php
cp ../conf/database.inc.php $final_path/local/config/database.inc.php
# Calculate and store the database config file checksum
ynh_store_file_checksum "$final_path/local/config/database.inc.php"

#=================================================
# ADD LDAP & FAIL2BAN PLUGINS
#=================================================

# Activate ldap plugin
ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE plugins SET state='active' WHERE id='Ldap_Login';"

# Configure and activate log_failed_logins plugin
ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "INSERT INTO plugins (id,state,version) VALUES ('log_failed_logins','active','1.2');" 2>&1 > /dev/null ||ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE plugins SET state='active' WHERE id='log_failed_logins';"
ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "INSERT INTO config (param, value) VALUES ('logFailedLoginsFilename','/var/log/${app}FailedLogins.log');" 2>&1 > /dev/null || ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE config SET value='/var/log/${app}FailedLogins.log' WHERE param='logFailedLoginsFilename';"
touch "/var/log/${app}FailedLogins.log"
chown $app: "/var/log/${app}FailedLogins.log"

# Set-up fail2ban
ynh_add_fail2ban_config "/var/log/${app}FailedLogins.log" "ip=<HOST>" 6

# Protect URIs if private
if [ $is_public -eq 0 ];
then
  ynh_app_setting_delete "$app" unprotected_uris
  ynh_app_setting_set "$app" protected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================
systemctl restart php5-fpm
systemctl reload nginx