#!/bin/sh

. ./myserver.conf
. ./utils.sh

install_mails_services_pkg()
{
    pkg_add dovecot dovecot-pigeonhole opensmtpd-filter-rspamd redis-6.2.12\
            opensmtpd-extras-6.7.1v0 opensmtpd-filter-dkimsign-0.5 rspamd-3.2 
}

gen_mails_service_configuration()
{
    cp -v default_configuration/opensmtpd/smtpd.conf.example my_configuration/opensmtpd/smtpd.conf
    sed -i "s/__DOMAIN__/$DOMAIN/g" my_configuration/opensmtpd/smtpd.conf
    cp -v default_configuration/opensmtpd/spamd.conf.example my_configuration/opensmtpd/spamd.conf
    cp -v default_configuration/dovecot/dovecot.conf.example my_configuration/dovecot/dovecot.conf
    cp -v default_configuration/dovecot/local.conf.example my_configuration/dovecot/local.conf
    sed -i "s/__DOMAIN__/$DOMAIN/g" my_configuration/dovecot/local.conf
}

gen_dkim_keys()
{
    # Generate dkim key
    openssl genrsa -out my_configuration/mail/$DOMAIN-private.key 2048
    openssl rsa -in my_configuration/mail/$DOMAIN-private.key -pubout | \
        sed '1s/.*/v=DKIM1;p=/;:nl;${s/-----.*//;q;};N;s/\n//g;b nl;' > default_configuration/mail/$DOMAIN-public.key

}

install_dovecot_service_antispam()
{
    # Add antispam utils for Dovecot
    cd /usr/local/lib/dovecot/sieve

    cat > report-ham.sieve <<EOF

require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"];

if environment :matches "imap.mailbox" "*" {
set "mailbox" "${1}";
}

if string "${mailbox}" "Trash" {
stop;
}

if environment :matches "imap.user" "*" {
set "username" "${1}";
}

pipe :copy "sa-learn-ham.sh" [ "${username}" ];
EOF

    cat > report-spam.sieve <<EOF
require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"];

if environment :matches "imap.user" "*" {
set "username" "${1}";
}

pipe :copy "sa-learn-spam.sh" [ "${username}" ];
EOF

    cat > sa-learn-ham.sh<<EOF
#!/bin/sh
exec /usr/local/bin/rspamc -d "${1}" learn_ham
EOF

    cat > sa-learn-spam.sh<<EOF

#!/bin/sh
exec /usr/local/bin/rspamc -d "${1}" learn_spam
EOF


    sievec report-ham.sieve
    sievec report-spam.sieve

    chmod 755 sa-learn-ham.sh
    chmod 755 sa-learn-spam.sh
}

install_mails_services_configuration()
{
    cp -v my_configuration/mail/smtpd.conf /etc/mail/smtpd.conf
    cp -v my_configuration/dovecot/dovecot.conf /etc/dovecot/
    cp -v my_configuration/dovecot/local.conf /etc/dovecot/local.conf
    mkdir /etc/mail/dkim/
    cp -v my_configuration/mail/$DOMAIN-private.key /etc/mail/dkim/
    cp -v my_configuration/mail/$DOMAIN-public.key /etc/mail/dkim/
    chown -R _dkimsign /etc/mail/dkim/
    touch /etc/mail/virtuals
    touch /etc/mail/passwd
    rm /etc/dovecot/conf.d/10-ssl.conf

}

make_system_mails_services_requirements()
{

    useradd -c "Virtual Mail Account" -d /var/vmail -s /sbin/nologin -u 2000 -g =uid -L staff vmail
    mkdir -p /var/vmail/$DOMAIN
    chown -R vmail:vmail /var/vmail/
    groupadd _maildaemons
    usermod -G _maildaemons _dovecot
    usermod -G _maildaemons _smtpd

    cp /etc/login.conf /etc/login.conf.orig
    cat >> /etc/login.conf <<EOF
dovecot:\
    :openfiles-cur=1024:\
    :openfiles-max=2048:\
    :tc=daemon:
EOF

}

make_directory_configuration()
{
    mkdir my_configuration/mail
    mkdir my_configuration/dovecot
}

if [ "$1" == "gen-config-only" ];
then
    gen_mails_service_configuration
    gen_dkim_keys
elif [ "$1" == "install" ];
then
    install_mails_services_pkg
    gen_mails_service_configuration
    gen_dkim_keys
    install_mails_services_configuration
    make_system_mails_services_requirements
    rcctl enable redis
    rcctl start redis
    restart_mails_service