#!/bin/bash
### App file generated with YoloGen, the YunoHost app generator, version .

# This is the tutorial version of the app.
# It contains extra commands to explain what should be done in case you want to adjust some part of the script.
# Once you are done, you may remove them.

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

### Settings are automatically loaded as bash variables
### in every app script context, therefore typically these will exist:
### - $domain
### - $path
### - $language
### - $install_dir
### - $port
### ...

### In the context of upgrade,
### - resources are automatically provisioned / updated / deleted (depending on existing resources)
### - a safety backup is automatically created by the core and will be restored if the upgrade fails

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
#ynh_script_progression "Ensuring downward compatibility..."

### N.B. : the following setting migration snippets are provided as *EXAMPLES*
### of what you may want to do in some cases (e.g. a setting was not defined on
### some legacy installs and you therefore want to initiaze stuff during upgrade)

# If db_name doesn't exist, create it
# ynh_app_setting_set_default --key=db_name --value="$(ynh_sanitize_dbid --db_name=$app)"

# If install_dir doesn't exist, create it
# ynh_app_setting_set_default --key=install_dir --value="/var/www/$app"

#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression "Stopping a systemd service..."

ynh_systemctl --service="$app" --action="stop"

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

ynh_setup_source --dest_dir="$install_dir" --full_replace --keep=""

# $install_dir will automatically be initialized with some decent
# permission by default... however, you may need to recursively reapply
# ownership to all files such as after the ynh_setup_source step

chown -R $app:www-data "$install_dir"

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression "Updating a configuration file..."

### Same as during install
###
### The file will automatically be backed-up if it's found to be manually modified (because
### ynh_add_config keeps track of the file's checksum)

ynh_config_add --template="" --destination="$install_dir/"

# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config

chmod 400 "$install_dir/"
chown $app:$app "$install_dir/"

### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$install_dir/"
### ynh_store_file_checksum --file="$install_dir/"

#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression "Upgrading system configurations related to $app..."

# This should be a literal copypasta of what happened in the install's "System configuration" section

ynh_config_add_nginx

ynh_config_add_systemd

yunohost service add "$app" --description="A short description of the app" --log="/var/log/$app/$app.log"

ynh_config_add_logrotate

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression "Starting a systemd service..."

ynh_systemctl --service="$app" --action="start"

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

ynh_script_progression "Upgrade of $app completed"