#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers
# Load common variables for all scripts.
source _variables

#=================================================
# 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 $app admin)
language=$(ynh_app_setting_get $app language)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)
port=$(ynh_app_setting_get $app port)
export=$(ynh_app_setting_get $app export)
db_name=$(ynh_app_setting_get $app db_name)
mypads=$(ynh_app_setting_get $app mypads)
useldap=$(ynh_app_setting_get $app useldap)
overwrite_settings=$(ynh_app_setting_get $app overwrite_settings)
overwrite_credentials=$(ynh_app_setting_get $app overwrite_credentials)
overwrite_nginx=$(ynh_app_setting_get $app overwrite_nginx)
overwrite_systemd=$(ynh_app_setting_get $app overwrite_systemd)

# Optional parameters from config-panel feature
pad_config_nocolors=$(ynh_app_setting_get $app pad_config_nocolors)
pad_config_showlinenumbers=$(ynh_app_setting_get $app pad_config_showlinenumbers)
pad_config_chatandusers=$(ynh_app_setting_get $app pad_config_chatandusers)
pad_config_alwaysshowchat=$(ynh_app_setting_get $app pad_config_alwaysshowchat)
pad_config_show_markdown=$(ynh_app_setting_get $app pad_config_show_markdown)

#=================================================
# CHECK VERSION
#=================================================

# Wait for etherpad to be fully started
ynh_check_starting "You can access your Etherpad instance at" "/var/log/$app/etherpad.log" "120"

ynh_abort_if_up_to_date

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

if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set $app is_public 1	# Convert is_public to boolean
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set $app is_public 0
	is_public=0
fi

if [ -z "$db_name" ]; then	# If db_name setting doesn't exist
	db_name=$(ynh_sanitize_dbid $app)
	ynh_app_setting_set $app db_name $db_name
fi

if [ -z "$abiword" ]; then	# If abiword setting doesn't exist
	abiword=0
	ynh_app_setting_set $app abiword $abiword
fi

if [ -n "$abiword" ]; then	# If abiword setting exists
	if [ $abiword -eq 1 ]; then
		export=abiword
	fi
	ynh_app_setting_set $app export $export
	ynh_app_setting_delete $app abiword
fi

if [ -z "$export" ]; then	# If export setting doesn't exist
	export=none
	ynh_app_setting_set $app export $export
fi

if [ -z "$mypads" ]; then	# If mypads setting doesn't exist
	mypads=1
	ynh_app_setting_set $app mypads $mypads
fi

if [ -z "$useldap" ]; then	# If useldap setting doesn't exist
	useldap=0
	ynh_app_setting_set $app useldap $useldap
fi

if [ -z "$path_url" ]; then	# If path_url setting doesn't exist
	path_url="/"
	ynh_app_setting_set $app path $path_url
fi

# If overwrite_settings doesn't exist, create it
if [ -z "$overwrite_settings" ]; then
	overwrite_settings=1
	ynh_app_setting_set $app overwrite_settings $overwrite_settings
fi

# If overwrite_credentials doesn't exist, create it
if [ -z "$overwrite_credentials" ]; then
	overwrite_credentials=1
	ynh_app_setting_set $app overwrite_credentials $overwrite_credentials
fi

# If overwrite_nginx doesn't exist, create it
if [ -z "$overwrite_nginx" ]; then
	overwrite_nginx=1
	ynh_app_setting_set $app overwrite_nginx $overwrite_nginx
fi

# If overwrite_systemd doesn't exist, create it
if [ -z "$overwrite_systemd" ]; then
	overwrite_systemd=1
	ynh_app_setting_set $app overwrite_systemd $overwrite_systemd
fi

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

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Cleanup installatioNettoyage des résidus d'installation non pris en charge par le script remove.
	ynh_clean_check_starting

	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# ACTIVATE MAINTENANCE MODE
#=================================================

ynh_maintenance_mode_ON

#=================================================
# STOP ETHERPAD
#=================================================

ynh_system_reload $app stop

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

ynh_setup_source "$final_path"	# Download, check integrity and uncompress the source from app.src

#=================================================
# NGINX CONFIGURATION
#=================================================

# Overwrite the nginx configuration only if it's allowed
if [ $overwrite_nginx -eq 1 ]
then
	if [ "$path_url" != "/" ]
	then
		ynh_replace_string "^#sub_path_only" "" "../conf/nginx.conf"
	fi
	ynh_replace_string "__PATH__/" "${path_url%/}/" "../conf/nginx.conf"
	ynh_add_nginx_config
fi

#=================================================
# UPGRADE NODEJS
#=================================================

# Remove the old nvm helper.
if [ -d /opt/nvm ]
then
	ynh_secure_remove "/opt/nvm"
	sed --in-place "/NVM_DIR/d" /root/.bashrc
fi

ynh_install_nodejs $nodejs_version

#=================================================
# UPGRADE NPM MODULES
#=================================================

# Update the main modules of etherpad
(cd "$final_path/src"
npm cache clean
ynh_exec_warn_less npm update)

# Then update the additionnal modules
(cd "$final_path"
npm cache clean
while read node_module
do
	echo "Update $node_module"
        ynh_exec_warn_less npm install --upgrade $node_module || true
done <<< "$(ls -1 "$final_path/node_modules" | grep "^ep_")")

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CONFIGURE ETHERPAD
#=================================================

# Overwrite the settings config file only if it's allowed
if [ $overwrite_settings -eq 1 ]
then
	ynh_backup_if_checksum_is_different "$final_path/settings.json"	# Verify the checksum and backup the file if it's different
	cp ../conf/settings.json "$final_path/settings.json"
	ynh_replace_string "__PORT__" "$port" "$final_path/settings.json"
	if [ "$export" = "abiword" ]
	then
		abiword_path=`which abiword`	# Get abiword binary path
		ynh_replace_string "\"abiword\" : null" "\"abiword\" : \"$abiword_path\"" "$final_path/settings.json"	# Renseigne l'emplacement de abiword dans la config de etherpad
	elif [ "$export" = "libreoffice" ]
	then
		soffice_path=`which soffice`	# Get soffice binary path
		ynh_replace_string "\"soffice\" : null" "\"soffice\" : \"$soffice_path\"" "$final_path/settings.json"	# Renseigne l'emplacement de abiword dans la config de etherpad
	fi
	if test -z $language; then
		language=en # If upgrading from a version which doesn't support translations, set language to English by default
		ynh_app_setting_set $app language $language
	fi
	ynh_replace_string "__LANGUAGE__" "$language" "$final_path/settings.json"
	# Use ldap for mypads
	if [ $mypads -eq 1 ] && [ $useldap -eq 1 ]
	then
		ynh_replace_string "//noldap\(.*\)" "\1 //useldap" "$final_path/settings.json"
	fi

	# Optional parameters from config-panel feature
	if [ -n "$pad_config_nocolors" ]; then
		ynh_replace_string "\(\"noColors\" *: \).*," "\1$pad_config_nocolors," "$final_path/settings.json"
	fi
	if [ -n "$pad_config_showlinenumbers" ]; then
		ynh_replace_string "\(\"showLineNumbers\" *: \).*," "\1$pad_config_showlinenumbers," "$final_path/settings.json"
	fi
	if [ -n "$pad_config_chatandusers" ]; then
		ynh_replace_string "\(\"chatAndUsers\" *: \).*," "\1$pad_config_chatandusers," "$final_path/settings.json"
	fi
	if [ -n "$pad_config_alwaysshowchat" ]; then
		ynh_replace_string "\(\"alwaysShowChat\" *: \).*," "\1$pad_config_alwaysshowchat," "$final_path/settings.json"
	fi
	if [ -n "$pad_config_show_markdown" ]; then
		ynh_replace_string "\(\"ep_markdown_default\" *: \).*," "\1$pad_config_show_markdown," "$final_path/settings.json"
	fi

	ynh_store_file_checksum "$final_path/settings.json"	# Recalculate and store the config file checksum into the app settings
fi

# Overwrite the credentials config file only if it's allowed
if [ $overwrite_credentials -eq 1 ]
then
	ynh_backup_if_checksum_is_different "$final_path/credentials.json"	# Verify the checksum and backup the file if it's different
	cp ../conf/credentials.json "$final_path/credentials.json"
	ynh_replace_string "__DB_USER__" "$app" "$final_path/credentials.json"
	db_pwd=$(ynh_app_setting_get $app mysqlpwd)
	ynh_print_OFF; password=$(ynh_app_setting_get $app password); ynh_print_ON
	ynh_replace_string "__DB_PWD__" "$db_pwd" "$final_path/credentials.json"
	ynh_replace_string "__ADMIN__" "$admin" "$final_path/credentials.json"
	ynh_print_OFF; ynh_replace_special_string "__PASSWD__" "$password" "$final_path/credentials.json"; ynh_print_ON

	ynh_store_file_checksum "$final_path/credentials.json"	# Recalculate and store the config file checksum into the app settings
fi

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

ynh_system_user_create $app $final_path	# Create the dedicated user, if it doesn't exist

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

# Set files ownership to etherpad
chown -R $app: $final_path
chmod 600 "$final_path/credentials.json"	# Restrict access to credentials.json
chown $app -R /var/log/$app/etherpad.log

#=================================================
# UPGRADE FAIL2BAN
#=================================================

ynh_add_fail2ban_config "/var/log/nginx/$domain-access.log" "<HOST> .* \"POST /mypads/api/auth/login HTTP/1.1\" 400" 5

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

ynh_use_logrotate --non-append

#=================================================
# SETUP SYSTEMD
#=================================================

# Overwrite the systemd configuration only if it's allowed
if [ $overwrite_systemd -eq 1 ]
then
	ynh_replace_string "__ENV_PATH__" "$PATH" "../conf/systemd.service"
	ynh_add_systemd_config
fi

#=================================================
# SOME HACKS
#=================================================

if [ $mypads -eq 1 ]
then
	mod_line=$(grep -nA5 "index.createOpenPad" $final_path/src/templates/index.html | grep "</div>" | cut -d '-' -f 1)	# Recherche le /div situé sous le champs d'ouverture de pad.
	sed -i "$mod_line s@div>@&\n\t<center><br><font size="5"><a href="./mypads/">Mypads</a></font></center>@" $final_path/src/templates/index.html	# Pour ajouter un lien vers le plugin mypads depuis la page d'Etherpad.
fi

#=================================================
# SETUP SSOWAT
#=================================================

# Make app public if necessary
if [ $is_public -eq 1 ]; then
	ynh_app_setting_set $app skipped_uris "/"
else
	ynh_app_setting_set $app skipped_uris "/admin"	# etherpad admin page doesn't support SSO...
fi

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

ynh_system_reload nginx

#=================================================
# CHECK ETHERPAD STARTING
#=================================================

# Wait for etherpad to be fully started
ynh_check_starting "You can access your Etherpad instance at" "/var/log/$app/etherpad.log" "120"

#=================================================
# DEACTIVE MAINTENANCE MODE
#=================================================

ynh_maintenance_mode_OFF