#!/bin/bash

set -e
set -u

function create_user_and_database() {
  local database=$1
  echo "  Creating user and database '$database'"
  psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "postgres" <<-EOSQL
        CREATE USER $database WITH PASSWORD '$POSTGRES_PASSWORD';
        CREATE DATABASE $database;
        GRANT ALL PRIVILEGES ON DATABASE $database TO $database;
EOSQL
}

if [ -n "${POSTGRES_MULTIPLE_DATABASES:-}" ]; then
  echo "Multiple database creation requested: $POSTGRES_MULTIPLE_DATABASES"
  for db in $(echo $POSTGRES_MULTIPLE_DATABASES | tr ',' ' '); do
    create_user_and_database $db
  done
  echo "Multiple databases created"
fi
# Based on https://dev.to/nietzscheson/multiples-postgres-databases-in-one-service-with-docker-compose-4fdf