_es_user=electrum-server
_es_group=electrum-server

post_install() {
  _mkuser
  chown -R $_es_user:$_es_group /etc/electrum-server        \
                                /etc/electrum-server.conf   \
                                /etc/electrum-server.banner \
                                /usr/share/electrum-server  \
                                /var/log/electrum-server
  printf "%b\n" "$ecdsa"
}

post_upgrade() {
  _mkuser
  chown -R $_es_user:$_es_group /etc/electrum-server        \
                                /etc/electrum-server.conf   \
                                /etc/electrum-server.banner \
                                /usr/share/electrum-server  \
                                /var/log/electrum-server
  printf "%b\n" "$ecdsa"
}

post_remove() {
  _rmuser
}

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

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

read -d '' ecdsa <<'EOF'
########################################################################
########################################################################
##                                                                    ##
##  Electrum Server                                                   ##
##  _______________                                                   ##
##                                                                    ##
##  Usage:                                                            ##
##                                                                    ##
##      systemctl start electrum-server                               ##
##      electrum-server getinfo|peers|numpeers|sessions|numsessions   ##
##                                                                    ##
##                                                                    ##
##                         ';,;:.                                     ##
##                       'o'   .;d.                                   ##
##                       K.      :l                                   ##
##                       cl     .O,                                   ##
##                        .c:cclc.                                    ##
##              .;::;.     .;ko,.     ':::'     .',,,.                ##
##            .OMMMMMWo  ,d,.  .oo  cXMMMMMX:  do.  .:d.              ##
##           x MMMMMMMMxlX.      kdoMMMMMMMMMoxl      '0              ##
##            oMMMMMMMN;'K,     .Oc;NMMMMMMMX,ld      ;k              ##
##             :0WMMNk.  .cl;,;cl,  'kWMMMWx.  :o:,';cc               ##
##                ..        .'.       .oWc.      .''.                 ##
##                                  'oc;,;lo.                         ##
##                                 ,O.     .0.                        ##
##                                 :k      .0.                        ##
##                                  cl,...:o,                         ##
##                                    .,,,.                           ##
##                                                                    ##
##                                                                    ##
##                                                                    ##
##  Say hi to the dev crew, other server operators and fans on        ##
##  irc.freenode.net #electrum and we'll try to congratulate you      ##
##  on supporting the community by running an Electrum node.          ##
##                                                                    ##
##  If you're operating a public Electrum server please subscribe     ##
##  to or regularly check the following thread:                       ##
##                                                                    ##
##  https://bitcointalk.org/index.php?topic=85475.0                   ##
##                                                                    ##
##  It'll contain announcements about important updates to Electrum   ##
##  server required for a smooth user experience.                     ##
##                                                                    ##
##  Please see /usr/share/doc/electrum-server/HOWTO.md for detailed   ##
##  information.                                                      ##
##                                                                    ##
########################################################################
########################################################################
EOF