post_install() {
  _mkuser
  _mkssl
  chown -R namecoin:namecoin /etc/namecoin /srv/namecoin
  printf "$namecoin\n"
}

post_upgrade() {
  _mkuser
  chown -R namecoin:namecoin /etc/namecoin /srv/namecoin
  printf "$namecoin\n"
}

post_remove() {
  _rmuser
  rm -rf /srv/namecoin
}

_mkuser() {
  getent passwd namecoin &>/dev/null || {
    echo -n "Creating namecoin user... "
    grep -E "^namecoin:" /etc/group >/dev/null || groupadd namecoin
    useradd -m -d /etc/namecoin -g namecoin -s /usr/bin/nologin namecoin 2>/dev/null
    echo "done"
  }
}

_rmuser() {
  echo -n "Removing namecoin user... "
  userdel -rf namecoin 2>/dev/null
  echo "done"
}

_mkssl() {
  echo -n "Enabling SSL..."
  mkdir -p /{etc,srv}/namecoin
  openssl genrsa -out /etc/namecoin/server.pem 2048
  expect <<EOF | perl -ne 'print if /-----BEGIN\sCERTIFICATE-----/../-----END\sCERTIFICATE-----/' > /etc/namecoin/server.cert
    spawn openssl req -new -x509 -nodes -sha1 -days 3650 -key /etc/namecoin/server.pem
    expect "Country*" {
      send "\r"
    }
    expect "State*" {
      send "\r"
    }
    expect "Locality*" {
      send "\r"
    }
    expect "Organization*" {
      send "\r"
    }
    expect "Organizational*" {
      send "\r"
    }
    expect "Common*" {
      send "\r"
    }
    expect "Email*" {
      send "\r"
    }
    expect eof
EOF
  echo "done"
}

read -d '' namecoin <<'EOF'
########################################################################
########################################################################
##                                                                    ##
##  Namecoin Core                                                      ##
##  ____________                                                      ##
##                                                                    ##
##  To start namecoin-core:                                            ##
##                                                                    ##
##      # systemctl start namecoin                                     ##
##                                                                    ##
##  To communicate with namecoin-core as a normal user:                ##
##                                                                    ##
##      $ mkdir -p ~/.namecoin                                         ##
##      $ cat > ~/.namecoin/namecoin.conf <<'EOF'                       ##
##      rpcconnect=127.0.0.1                                          ##
##      rpcport=8336                                                  ##
##      rpcuser=namecoin                                               ##
##      rpcpassword=secret                                            ##
##      rpcssl=1                                                      ##
##      EOF                                                           ##
##                                                                    ##
##      $ namecoind getmininginfo                                      ##
##                                                                    ##
##  Config:        /etc/namecoin/namecoin.conf                          ##
##  Blockchain:    /srv/namecoin                                       ##
##  Documentation: /usr/share/doc/namecoin                             ##
##                                                                    ##
########################################################################
########################################################################
EOF