#!/bin/bash
set -eu  # exit on error ; treat unset variables as error


# Retrieve arguments
domain=$(sudo yunohost app setting mattermost domain)
is_public=$(sudo yunohost app setting mattermost is_public)

# Set up common variables
root_path="$(pwd)/.."
final_path=/var/www/mattermost
version=$(cat "$root_path/VERSION")
archive_filename="mattermost-$version.tar.gz"

# Cleanup and restart if exit with an error
function cleanup_and_restart
{
    set +e
    rm "$archive_filename"
    sudo supervisorctl start mattermost
    exit 1
}
trap cleanup_and_restart ERR

# Stop server
sudo supervisorctl stop mattermost

# Download code
archive_url="https://releases.mattermost.com/${version}/mattermost-team-${version}-linux-amd64.tar.gz"
wget --quiet --output-document "$archive_filename" "$archive_url"

# Backup configuration file
config_file="$final_path/config/config.json"
backup_config_file="/tmp/config.json"

sudo cp -f "$config_file" "$backup_config_file"

# Copy new code
sudo rm -rf "$final_path"
sudo mkdir -p "$final_path"
sudo tar -xvz --file "$archive_filename" --directory "$final_path" --strip-components 1
rm -f "$archive_filename"

# Restore configuration file
sudo cp -f "$backup_config_file" "$config_file"

# Restore file permissions
sudo chown -R www-data: "$final_path"

# Update Nginx configuration file
sudo cp -f $root_path/conf/nginx.conf-nosub /etc/nginx/conf.d/$domain.d/mattermost.conf

# Start server
sudo supervisorctl start mattermost