#!/bin/bash
# postinst script for jitsi-meet-prosody
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    configure)

        . /etc/jitsi/videobridge/config

        . /etc/jitsi/jicofo/config

        # loading debconf
        . /usr/share/debconf/confmodule

        # detect dpkg-reconfigure, just delete old links
        db_get jitsi-meet/jvb-hostname
        JVB_HOSTNAME_OLD=$RET
        if [ -n "$RET" ] && [ ! "$JVB_HOSTNAME_OLD" = "$JVB_HOSTNAME" ] ; then
            rm -f /etc/prosody/conf.d/$JVB_HOSTNAME_OLD.cfg.lua
            rm -f /etc/prosody/certs/$JVB_HOSTNAME_OLD.key
            rm -f /etc/prosody/certs/$JVB_HOSTNAME_OLD.crt
        fi

        # stores the hostname so we will reuse it later, like in purge
        db_set jitsi-meet-prosody/jvb-hostname $JVB_HOSTNAME

        # and we're done with debconf
        db_stop

        PROSODY_CONFIG_PRESENT="true"
        PROSODY_CREATE_JICOFO_USER="false"
        PROSODY_HOST_CONFIG="/etc/prosody/conf.avail/$JVB_HOSTNAME.cfg.lua"
        PROSODY_CONFIG_OLD="/etc/prosody/prosody.cfg.lua"
        # if there is no prosody config extract our template
        # check for config in conf.avail or check whether it wasn't already configured in main config
        if [ ! -f $PROSODY_HOST_CONFIG ] && ! grep -q "VirtualHost \"$JVB_HOSTNAME\"" $PROSODY_CONFIG_OLD; then
            PROSODY_CONFIG_PRESENT="false"
            mkdir -p /etc/prosody/conf.avail/
            cp /usr/share/doc/jitsi-meet-prosody/prosody.cfg.lua-jvb.example $PROSODY_HOST_CONFIG
            sed -i "s/jitmeet.example.com/$JVB_HOSTNAME/g" $PROSODY_HOST_CONFIG
            sed -i "s/jitmeetSecret/$JVB_SECRET/g" $PROSODY_HOST_CONFIG
            sed -i "s/focusSecret/$JICOFO_SECRET/g" $PROSODY_HOST_CONFIG
            sed -i "s/focusUser/$JICOFO_AUTH_USER/g" $PROSODY_HOST_CONFIG
            if [ ! -f /etc/prosody/conf.d/$JVB_HOSTNAME.cfg.lua ]; then
                ln -s $PROSODY_HOST_CONFIG /etc/prosody/conf.d/$JVB_HOSTNAME.cfg.lua
            fi
            PROSODY_CREATE_JICOFO_USER="true"
            # on some distributions main prosody config doesn't include configs
            # from conf.d folder enable it as this where we put our config by default
            if ! grep -q "Include \"conf\.d\/\*\.cfg.lua\"" $PROSODY_CONFIG_OLD; then
                echo -e "\nInclude \"conf.d/*.cfg.lua\"" >> $PROSODY_CONFIG_OLD
            fi
        fi
        # UPGRADE to server side focus check if focus is configured
        if [ -f $PROSODY_HOST_CONFIG ] && ! grep -q "VirtualHost \"auth.$JVB_HOSTNAME\"" $PROSODY_HOST_CONFIG; then
            echo -e "\nVirtualHost \"auth.$JVB_HOSTNAME\"" >> $PROSODY_HOST_CONFIG
            echo -e "        authentication = \"internal_plain\"\n" >> $PROSODY_HOST_CONFIG
            sed -i "s/Component \"conference.$JVB_HOSTNAME\" \"muc\"/Component \"conference.$JVB_HOSTNAME\" \"muc\"\nadmins = { \"$JICOFO_AUTH_USER@auth.$JVB_HOSTNAME\" }\n/g" $PROSODY_HOST_CONFIG
            echo -e "Component \"focus.$JVB_HOSTNAME\"" >> $PROSODY_HOST_CONFIG
            echo -e "    component_secret=\"$JICOFO_SECRET\"\n" >> $PROSODY_HOST_CONFIG
            PROSODY_CREATE_JICOFO_USER="true"
        # UPGRADE to server side focus on old config(/etc/prosody/prosody.cfg.lua)
        elif [ ! -f $PROSODY_HOST_CONFIG ] && ! grep -q "VirtualHost \"auth.$JVB_HOSTNAME\"" $PROSODY_CONFIG_OLD; then
            echo -e "\nVirtualHost \"auth.$JVB_HOSTNAME\"" >> $PROSODY_CONFIG_OLD
            echo -e "        authentication = \"internal_plain\"\n" >> $PROSODY_CONFIG_OLD
            if ! grep -q "admins = { }" $PROSODY_CONFIG_OLD; then
                echo -e "admins = { \"$JICOFO_AUTH_USER@auth.$JVB_HOSTNAME\" }\n" >> $PROSODY_CONFIG_OLD
            else
                sed -i "s/admins = { }/admins = { \"$JICOFO_AUTH_USER@auth.$JVB_HOSTNAME\" }\n/g" $PROSODY_CONFIG_OLD
            fi
            echo -e "Component \"focus.$JVB_HOSTNAME\"" >> $PROSODY_CONFIG_OLD
            echo -e "    component_secret=\"$JICOFO_SECRET\"\n" >> $PROSODY_CONFIG_OLD
            PROSODY_CREATE_JICOFO_USER="true"
        fi

        if [ "$PROSODY_CREATE_JICOFO_USER" = "true" ]; then
            # create 'focus@auth.domain' prosody user
            prosodyctl register $JICOFO_AUTH_USER $JICOFO_AUTH_DOMAIN $JICOFO_AUTH_PASSWORD
            # trigger a restart
            PROSODY_CONFIG_PRESENT="false"
        fi

        if [ ! -f /var/lib/prosody/$JVB_HOSTNAME.crt ]; then
            HOST="$( (hostname -s; echo localhost) | head -n 1)"
            DOMAIN="$( (hostname -d; echo localdomain) | head -n 1)"
            openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 -subj \
                "/O=$DOMAIN/OU=$HOST/CN=$JVB_HOSTNAME/emailAddress=webmaster@$HOST.$DOMAIN" \
                -keyout /var/lib/prosody/$JVB_HOSTNAME.key \
                -out /var/lib/prosody/$JVB_HOSTNAME.crt
        fi
        ln -sf /var/lib/prosody/$JVB_HOSTNAME.key /etc/prosody/certs/$JVB_HOSTNAME.key
        ln -sf /var/lib/prosody/$JVB_HOSTNAME.crt /etc/prosody/certs/$JVB_HOSTNAME.crt

        if [ "$PROSODY_CONFIG_PRESENT" = "false" ]; then
            invoke-rc.d prosody restart
            invoke-rc.d jitsi-videobridge restart
            invoke-rc.d jicofo restart
        fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0