install.sh

#!/bin/bash

# Default Python version
PYTHON_VERSION="python3"

# Parse command line arguments
while getopts "p:" opt; do
  case $opt in
    p) PYTHON_VERSION="$OPTARG"
    ;;
    *) echo "Usage: $0 [-p python_version]"
       exit 1
    ;;
  esac
done

echo "Using Python version: $PYTHON_VERSION"

# Check if virtualenv is installed
if ! command -v virtualenv &> /dev/null
then
    echo "virtualenv could not be found. Installing..."
    pip install virtualenv
fi

# Delete virtual environment if it already exists
if [ -d /var/lib/text-pair ]; then
    echo "Deleting existing TextPAIR installation..."
    sudo rm -rf /var/lib/text-pair
fi


# Give current user permission to write to /var/lib/textpair
sudo mkdir -p /var/lib/text-pair
sudo chown -R $USER:$USER /var/lib/text-pair

# Create the virtual environment
virtualenv -p $PYTHON_VERSION /var/lib/text-pair/textpair_env
source /var/lib/text-pair/textpair_env/bin/activate
pip3 install lib/.
deactivate

# Install the textpair script
sudo cp textpair /usr/local/bin/

# Install compareNgrams binary
arch=$(uname -m)
if [ "$arch" = "x86_64" ]; then
    binary_path="lib/core/binary/x86_64/compareNgrams"
elif [ "$arch" = "aarch64" ]; then
    binary_path="lib/core/binary/aarch64/compareNgrams"
else
    echo "Only x86_64 and ARM are supported at this time."
    exit 1
fi
sudo rm -f /usr/local/bin/compareNgrams
sudo cp "$binary_path" /usr/local/bin/compareNgrams
sudo chmod +x /usr/local/bin/compareNgrams


# Install the web application components
echo -e "\nMoving web application components into place..."
sudo mkdir -p /var/lib/text-pair
if [ ! -f /var/lib/text-pair/api_server/web_server.sh ]
    then
        sudo cp -Rf api_server /var/lib/text-pair/api_server/
else
    echo "/var/lib/text-pair/api_server/web_server.sh already exists, not modifying..."
fi

if [ -d web/web_app/node_modules ]
    then
        sudo rm -rf web/web_app/node_modules
fi
sudo cp -Rf api /var/lib/text-pair/
sudo cp -Rf web-app /var/lib/text-pair/
sudo cp -Rf config /var/lib/text-pair/

echo -e "\nMoving global configuration into place..."
sudo mkdir -p /etc/text-pair
if [ ! -f /etc/text-pair/global_settings.ini ]
    then
        sudo touch /etc/text-pair/global_settings.ini
        echo "[WEB_APP]" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "api_server = http://localhost/text-pair-api" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "web_app_path =" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "[DATABASE]" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "database_name =" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "database_user =" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "database_password =" | sudo tee -a /etc/text-pair/global_settings.ini > /dev/null
        echo "Make sure you create a PostgreSQL database with a user with read/write access to that database and configure /etc/text-pair/global_settings.ini accordingly."
else
    echo "/etc/text-pair/global_settings.ini already exists, not modifying..."
fi

echo -e "\n## IMPORTANT ##"
echo "In order to start the TextPAIR web app, you need to configure and start up the web_server.sh script."
echo "You can either:"
echo "- Start it manually at /var/lib/text-pair/api_server/web_server.sh"
echo "- Use the systemd init script located at /var/lib/text-pair/api_server/textpair.service: for this you will need to copy it to your OS systemd folder (usually /etc/systemd/system/) and run 'systemctl enable textpair && systemctl start textpair' as root"