configure

#!/bin/bash

function read_jupyterhub_domain_name() {
    cat << EOF
When running in a production setup, JupyterHub needs to know the domain
name it is running under. Please either enter a domain name now, or
leave it blank to use "localhost".
EOF

    printf "JUPYTERHUB_DOMAIN_NAME="
    read JUPYTERHUB_DOMAIN_NAME
    if [ -z "$JUPYTERHUB_DOMAIN_NAME" ]
    then
        JUPYTERHUB_DOMAIN_NAME="localhost"
    fi;

    echo "export JUPYTERHUB_DOMAIN_NAME=$JUPYTERHUB_DOMAIN_NAME"
}

function read_mmt_domain_name() {
    cat << EOF
When running in a production setup, the MMT-server needs to know the domain
name it is running under. Please either enter a domain name now, or
leave it blank to use "127.0.0.1"
EOF

    printf "MMT_DOMAIN_NAME="
    read MMT_DOMAIN_NAME
    if [ -z "$MMT_DOMAIN_NAME" ]
    then
      MMT_DOMAIN_NAME="127.0.0.1"
    fi;

    echo "export MMT_DOMAIN_NAME=$MMT_DOMAIN_NAME"
}

function read_mmt_archives() {
    cat << EOF
If you have any MMT-archives that you would like to install, please state them space-separated here.
EOF
    rm -f .config/mmt-archives
    printf "MMT_ARCHIVES="
    read MMT_ARCHIVES
    if [ -z "$MMT_ARCHIVES" ]
    then
        MMT_ARCHIVES="meta/inf MMT/LFX@devel MMT/urtheories@devel ODK/ODK@devel alignments/Public"
    fi;
      echo "Installing: $MMT_ARCHIVES"
}

function read_db_password() {
    cat << EOF
Please select a database password, or leave it blank to use: 12345.
If you have openssl installed you can also generate a password by typing: openssl
EOF

    printf "POSTGRES_PASSWORD="
    read POSTGRES_PASSWORD
    if [ -z "$POSTGRES_PASSWORD" ]
    then
      POSTGRES_PASSWORD="12345"
    fi;
    if [ "$POSTGRES_PASSWORD" = "openssl" ]
    then
      echo "Generating postgres password"
      POSTGRES_PASSWORD=$(openssl rand -hex 32)
    fi;

    echo "export POSTGRES_PASSWORD=$POSTGRES_PASSWORD"
}

function read_jupyterhub_ssl_email() {
    cat << EOF
If SSL Certificates should be automatically retrieved, JupyterHub needs to
know an email address to register a new Let’s Encrypt account under.
Please note by entering an email address here, you implicitly agree to
the Let’s Encrypt subscriber agreement currently found under
https://letsencrypt.org/documents/2017.11.15-LE-SA-v1.2.pdf.
EOF

    printf "JUPYTERHUB_SSL_EMAIL="
    read JUPYTERHUB_SSL_EMAIL
    echo "export JUPYTERHUB_SSL_EMAIL=$JUPYTERHUB_SSL_EMAIL"
}


function write_nginx_config() {
    echo "DEFAULT_HOST=$JUPYTERHUB_DOMAIN_NAME" > .config/nginx
    echo "Wrote .config/nginx"
}

function write_mmt_archives() {
    echo "MMT_ARCHIVES=$MMT_ARCHIVES" > .config/mmt-archives
    echo "Wrote .config/mmt-archives"
}

function write_makefile_config() {
    echo "MMT_FRONTEND_BASE_URL=$MMT_DOMAIN_NAME" > .config/makefile
    echo "Wrote .config/makefile"
}


function write_jupyterhub_config() {
    echo "VIRTUAL_HOST=$JUPYTERHUB_DOMAIN_NAME" > .config/jupyterhub


    if [ ! -z "$JUPYTERHUB_SSL_EMAIL" ]; then
        echo "MMT_FRONTEND_BASE_URL=https://$MMT_DOMAIN_NAME" >> .config/jupyterhub
        echo "LETSENCRYPT_HOST=$JUPYTERHUB_DOMAIN_NAME" >> .config/jupyterhub
        echo "LETSENCRYPT_EMAIL=$JUPYTERHUB_SSL_EMAIL"  >> .config/jupyterhub
    else
      echo "MMT_FRONTEND_BASE_URL=http://$MMT_DOMAIN_NAME" >> .config/jupyterhub
    fi;

    echo "Wrote .config/jupyterhub"
}

function write_mmt_config() {
    echo "VIRTUAL_HOST=$MMT_DOMAIN_NAME" > .config/mmt

    if [ ! -z "$JUPYTERHUB_SSL_EMAIL" ]; then
        echo "LETSENCRYPT_HOST=$MMT_DOMAIN_NAME" >> .config/mmt
        echo "LETSENCRYPT_EMAIL=$JUPYTERHUB_SSL_EMAIL"  >> .config/mmt
    fi;

    echo "Wrote .config/mmt"
}

function write_db_password() {
    echo "POSTGRES_PASSWORD=$POSTGRES_PASSWORD" > .config/postgres
    echo "Wrote .config/postgres"
}


function main() {
    echo "JUPYTERHUB DOCKER CONFIGURATION"

    echo ""
    read_jupyterhub_domain_name

    echo ""
    read_mmt_domain_name

    echo ""
    read_mmt_archives

    echo ""
    read_jupyterhub_ssl_email

    echo ""
    read_db_password

    echo ""
    echo "WRITING CONFIGURATION"

    mkdir -p .config

    write_mmt_archives
    write_nginx_config
    write_makefile_config
    write_jupyterhub_config
    write_mmt_config
    write_db_password
    echo "Done. "
}

main