#!/bin/sh

# The LDAP library used by prosody (lualdap) does not support SASL binds.
# Therefore, you must specify the prosody_ldap_password variable.

# prosody_acme_host=
: ${prosody_admins:=''}
: ${prosody_public_fqdn:="$fqdn"}
: ${prosody_domains:="$email_domain"}
: ${prosody_ldap_password:='changeme'}
: ${prosody_dbname:='prosody'}
: ${prosody_dbhost:="$postgres_host"}
: ${prosody_access_role:='xmpp-access'}
: ${prosody_archive_expiration:='1w'}
: ${prosody_upload_sizelimit:='104857600'} # 100 MB
: ${prosody_upload_expiration:='604800'}   # 1 week
: ${prosody_upload_quota:='25769803776'}   # 24 GB
: ${prosody_turn_port:='3478'}
: ${prosody_turn_host:="$turn_domain"}
: ${prosody_turn_realm:="$turn_domain"}
: ${prosody_turn_secret="$turn_secret"}

prosody_dn="uid=${prosody_username},${robots_basedn}"
prosody_local_user=prosody
prosody_conf_dir=/usr/local/etc/prosody
prosody_certs_dir="${prosody_conf_dir}/certs"
prosody_keytab="${keytab_dir}/prosody.client.keytab"
prosody_roster_path="${prosody_conf_dir}/roster.ini"
prosody_http_port=8080
prosody_db_dir=/var/db/prosody
prosody_upload_dir="${prosody_db_dir}/http_upload"

prosody_https_cacert="${acme_cert_dir}/nginx.ca.crt"
prosody_https_cert="${acme_cert_dir}/nginx.crt"
prosody_https_key="${acme_cert_dir}/nginx.key"

# Install required packages.
pkg install -y \
  prosody \
  prosody-modules \
  lua54-luadbi \
  lua54-lualdap \
  nginx

# Create ZFS dataset for HTTP upload files.
create_dataset -o "mountpoint=${prosody_db_dir}" "${state_dataset}/prosody"
install_directory -o "$prosody_local_user" -g "$prosody_local_user" -m 0750 "$prosody_db_dir"

# Create prosody user private group.
ldap_add "cn=${prosody_username},${private_groups_basedn}" <<EOF
objectClass: groupOfMembers
objectClass: posixGroup
cn: ${prosody_username}
gidNumber: ${prosody_uid}
member: uid=${prosody_username},${robots_basedn}
EOF

# Create prosody user account.
ldap_add "$prosody_dn" <<EOF
objectClass: account
objectClass: posixAccount
uid: ${prosody_username}
cn: ${prosody_username}
uidNumber: ${prosody_uid}
gidNumber: ${prosody_uid}
gecos: Prosody Pseudo-User
loginShell: /sbin/nologin
homeDirectory: /nonexistent
EOF

# Create principal and keytab.
add_principal -nokey -x "dn=${prosody_dn}" "$prosody_username"

ktadd -k "$prosody_keytab" "$prosody_username"
chgrp "$prosody_local_user" "$prosody_keytab"
chmod 640 "$prosody_keytab"

prosody_local_uid=$(id -u "$prosody_local_user")
install_directory -o "$prosody_local_user" -m 0700 "/var/krb5/user/${prosody_local_uid}"
ln -snfv "$prosody_keytab" "/var/krb5/user/${prosody_local_uid}/client.keytab"

# Set LDAP password for prosody user.
ldap_passwd "$prosody_dn" "$prosody_ldap_password"

# Create postgres user and database.
postgres_create_role "$prosody_dbhost" "$prosody_username"
postgres_create_database "$prosody_dbhost" "$prosody_dbname" "$prosody_username"

# Retrieve prosody certificates via ACME proxy.
install_directory -o root -g "$prosody_local_user" -m 0770 "$prosody_certs_dir"
install_file -m 0555 /usr/local/libexec/prosody-acme-proxy
su -m "$prosody_local_user" -c "/usr/local/libexec/prosody-acme-proxy ${prosody_username}@${prosody_acme_host} ${prosody_domains}"

# Copy prosody configuration.
install_template -o root -g "$prosody_local_user" -m 0640 /usr/local/etc/prosody/prosody.cfg.lua

# Configure automatic roster.
install_file -m 0555 /usr/local/libexec/prosody-update-roster
install -Cv -m 0640 -o "$prosody_local_user" -g "$prosody_local_user" /dev/null "${prosody_conf_dir}/roster.ini"
su -m "$prosody_local_user" -c "/usr/local/libexec/prosody-update-roster ${prosody_access_role} ${prosody_roster_path}"

# Copy prosody crontab.
install_template -m 0644 /etc/cron.d/prosody

# Configure nginx.
install_template -m 0644 "${nginx_conf_dir}/nginx.conf"
[ -f "${nginx_conf_dir}/vhosts.conf" ] || install -Cv -m 0644 /dev/null "${nginx_conf_dir}/vhosts.conf"
sysrc -v nginx_enable=YES
service nginx restart
install_file -m 0644 /etc/newsyslog.conf.d/nginx.conf

# Retrieve webserver certificate via ACME.
install_template -m 0600 /usr/local/etc/sudoers.d/acme
acme_install_certificate \
  -g "$nginx_user" \
  -r 'sudo service nginx reload' \
  nginx \
  "$prosody_public_fqdn"

# Now that we have the ACME certs, add the vhosts.
install_template -m 0644 "${nginx_conf_dir}/vhosts.conf"
service nginx restart

# Enable and start daemons.
sysrc -v prosody_enable=YES
[ "${prosody_restart:-}" = false ] || service prosody restart
service nginx restart

# Create access role.
ldap_add "cn=${prosody_access_role},${roles_basedn}" <<EOF
objectClass: groupOfMembers
cn: ${prosody_access_role}
EOF