0-custom_http_response_header

#!/usr/bin/env bash
# Setup web-02 similarly to web-01

echo -e "Updating and perfoming minor check...\n"

function install() {
         command -v "$!" &> /dev/null

         #shellcheck disable=SC2181
         if  [ $? -ne 0 ]; then
                  echo -e "     Installing: $1$\n"
                  sudo apt-get update -y -qq && \
                          sudo apt-get install -y "$1" -qq
                  echo -e "\n"
         else
                  echo -e "     ${1} is already installed.\n"
         fi
}

# Install Nginx
install nginx

echo -e "\nPerforming checks...\n"

# Allow Nginx on firewall
sudo ufw allow 'Nginx HTTP'

# Transfer ownership to website files for easy editing
if [ -d "/var/www" ]; then
        sudo chown -R "$USER":"$USER" /var/www
        sudo chmod -R 755 /var/www
else
        sudo mkdir -p /var/www
        sudo chown -R "$USER":"$USER" /var/www
        sudo chmod -R 755 /var/www
fi

# Create new index
echo "Hello World!" > /var/www/html/index.html

# Create new error page
echo "Ceci n'est pas une page" > /var/www/html/error_404.html

# backup default server config file
sudo cp /etc/nginx/sites-enabled/default nginx-sites-enabled_default.backup

server_config=\
"server {
		listen 80 default_server;
		listen [::]:80 default_server;
		root /var/www/html;
		index index.html index.htm index.nginx-debian.html
		server_name_;
		add_header X-Served-By \$hostname;
		location / {
			try_files \$uri \$uri/ =404;
		}
		if (\$request_filename ~ redirect_me){
			rewrite ^ https://femiajanaku.vercel.app permanent;
		}
		error_page 404 /error_404.html;
		location = /error_404.html {
			internal;
		}
}"

#shellcheck disable=SC2154
echo "$server_config" | sudo dd status=none of=/etc/nginx/sites-enabled/default

if [ "$(pgrep -c nginx)" -le 0 ]; then
	sudo service nginx start
else
	sudo service nginx restart
fi