#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Mumble application
#
# License
# =======
#
# Copyright (C) 2014-2018 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

VARIANTS='full full-vim chat'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

# Password used for mumble server
MUMBLE_SERVER_PASSWORD=
# Port on which mumble server listens
MUMBLE_PORT=64738

# Location of mumble database and configuration
MUMBLE_DATABASE="mumble-server.sqlite"
MUMBLE_CONFIG_FILE="mumble-server.ini"

MUMBLE_SHORT_DESCRIPTION=$'Mumble'
MUMBLE_DESCRIPTION=$'Mumble'
MUMBLE_MOBILE_APP_URL='https://f-droid.org/packages/com.morlunk.mumbleclient'

mumble_variables=(MY_USERNAME
                  DEFAULT_DOMAIN_NAME
                  MUMBLE_PORT
                  ONION_ONLY
                  ADMIN_USERNAME)

function logging_on_mumble {
    if [ -f /etc/mumble-server.ini ]; then
        sed -i 's|logfile=.*|logfile=/var/log/mumble-server.log|g' /etc/mumble-server.ini
    fi
}

function logging_off_mumble {
    if [ -f /etc/mumble-server.ini ]; then
        sed -i 's|logfile=.*|logfile=/dev/null|g' /etc/mumble-server.ini
        if [ -d /var/log/mumble-server ]; then
            $REMOVE_FILES_COMMAND /var/log/mumble-server/*
            rm -rf /var/log/mumble-server
        fi
    fi
}

function install_interactive_mumble {
    echo -n ''
    APP_INSTALLED=1
}

function change_password_mumble {
    new_mumble_password="$2"

    set_password_for_all_users mumble "$new_mumble_password"
    sed -i "s|serverpassword=.*|serverpassword=$new_mumble_password|g" /etc/mumble-server.ini
    systemctl restart mumble-server
}

function reconfigure_mumble {
    echo -n ''
}

function upgrade_mumble {
    if [ -d /etc/letsencrypt ]; then
        usermod -a -G ssl-cert mumble-server
    fi

    if [ ! -f "/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem" ]; then
        if ! grep -q "mumble.pem" /etc/mumble-server.ini; then
            sed -i 's|sslCert=.*|sslCert=/var/lib/mumble-server/mumble.pem|g' /etc/mumble-server.ini
            sed -i 's|sslKey=.*|sslKey=/var/lib/mumble-server/mumble.key|g' /etc/mumble-server.ini
            systemctl restart mumble
        fi
    else
        if ! grep -q "${DEFAULT_DOMAIN_NAME}/fullchain.pem" /etc/mumble-server.ini; then
            usermod -a -G ssl-cert mumble-server
            sed -i "s|sslCert=.*|sslCert=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/mumble-server.ini
            sed -i "s|sslKey=.*|sslKey=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/mumble-server.ini
            systemctl restart mumble
        fi
    fi
}

function backup_local_mumble {
    if [ -f /etc/mumble-server.ini ]; then
        echo $"Backing up Mumble settings"
        temp_backup_dir=/root/tempmumblebackup
        if [ ! -d $temp_backup_dir ]; then
            mkdir -p $temp_backup_dir
        fi
        cp -f /etc/mumble-server.ini $temp_backup_dir
        cp -f /var/lib/mumble-server/mumble-server.sqlite $temp_backup_dir
        backup_directory_to_usb $temp_backup_dir mumble
        echo $"Mumble settings backup complete"
    fi
}

function restore_local_mumble {
    if [ -d "$USB_MOUNT/backup/mumble" ]; then
        echo $"Restoring mumble settings"
        temp_restore_dir=/root/tempmumble
        function_check restore_directory_from_usb
        restore_directory_from_usb $temp_restore_dir voip
        restore_directory_from_usb $temp_restore_dir mumble
        if [ -d "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup" ]; then
            cp -f "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup/mumble-server.ini" /etc/
        else
            cp -f $temp_restore_dir/mumble-server.ini /etc/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            rm -rf $temp_restore_dir
            function_check set_user_permissions
            set_user_permissions
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 3679
        fi
        if [ -d "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup" ]; then
            cp -f "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup/mumble-server.sqlite" /var/lib/mumble-server/
        else
            cp -f $temp_restore_dir/mumble-server.sqlite /var/lib/mumble-server/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            rm -rf $temp_restore_dir
            function_check set_user_permissions
            set_user_permissions
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 276
        fi
        rm -rf $temp_restore_dir
        cp /etc/ssl/certs/mumble* /var/lib/mumble-server
        cp /etc/ssl/private/mumble* /var/lib/mumble-server
        chown -R mumble-server:mumble-server /var/lib/mumble-server
        systemctl restart mumble-server
    fi
}

function backup_remote_mumble {
    if [ -f /etc/mumble-server.ini ]; then
        echo $"Backing up mumble settings"
        if [ ! -d /root/tempmumblebackup ]; then
            mkdir -p /root/tempmumblebackup
        fi
        cp -f /etc/mumble-server.ini /root/tempmumblebackup
        cp -f /var/lib/mumble-server/mumble-server.sqlite /root/tempmumblebackup
        backup_directory_to_friend /root/tempmumblebackup mumble
        echo $"Backup of mumble settings complete"
    fi
}

function restore_remote_mumble {
    if [ -d "$SERVER_DIRECTORY/backup/mumble" ]; then
        echo $"Restoring Mumble settings"
        temp_restore_dir=/root/tempmumble
        function_check restore_directory_from_friend
        restore_directory_from_friend $temp_restore_dir mumble
        if [ -d "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup" ]; then
            cp -f "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup/mumble-server.ini" /etc/
        else
            cp -f $temp_restore_dir/mumble-server.ini /etc/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            rm -rf $temp_restore_dir
            exit 7823
        fi
        if [ -d "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup" ]; then
            cp -f "$temp_restore_dir/home/$ADMIN_USERNAME/tempbackup/mumble-server.sqlite" /var/lib/mumble-server/
        else
            cp -f $temp_restore_dir/mumble-server.sqlite /var/lib/mumble-server/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            rm -rf $temp_restore_dir
            exit 276
        fi
        rm -rf $temp_restore_dir
        cp /etc/ssl/certs/mumble* /var/lib/mumble-server
        cp /etc/ssl/private/mumble* /var/lib/mumble-server
        chown -R mumble-server:mumble-server /var/lib/mumble-server
        systemctl restart mumble-server
        echo $"Restore of Mumble complete"
    fi
}

function remove_mumble {
    apt-get -yq remove --purge mumble-server
    if [[ $ONION_ONLY == "no" ]]; then
        firewall_remove ${MUMBLE_PORT}
    fi
    if [ -f /etc/mumble-server.ini ]; then
        rm /etc/mumble-server.ini
    fi
    remove_certs mumble
    if [ -d /var/lib/mumble-server ]; then
        rm -rf /var/lib/mumble-server
    fi
    function_check remove_onion_service
    remove_onion_service mumble ${MUMBLE_PORT}
    sed -i '/mumble/d' "$COMPLETION_FILE"
}

function configure_firewall_for_mumble {
    if [[ $(is_completed "${FUNCNAME[0]}") == "1" ]]; then
        return
    fi
    if [[ $ONION_ONLY != "no" ]]; then
        return
    fi
    firewall_add Mumble ${MUMBLE_PORT}
    mark_completed "${FUNCNAME[0]}"
}

function install_mumble {
    apt-get -yq install mumble-server

    if [ -f "$IMAGE_PASSWORD_FILE" ]; then
        MUMBLE_SERVER_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
    else
        if [ ! "$MUMBLE_SERVER_PASSWORD" ]; then
            MUMBLE_SERVER_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
            if [ ${#MUMBLE_SERVER_PASSWORD} -lt "$MINIMUM_PASSWORD_LENGTH" ]; then
                MUMBLE_SERVER_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
            fi
        fi
    fi

    if [[ ${ONION_ONLY} == 'no' ]]; then
        if [ ! -d "/var/www/${DEFAULT_DOMAIN_NAME}/htdocs" ]; then
            mkdir "/var/www/${DEFAULT_DOMAIN_NAME}/htdocs"
        fi
        if [ ! -f "/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem" ]; then
            if [ -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.crt" ]; then
                rm "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.crt"
            fi
            if [ -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.dhparam" ]; then
                rm "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.dhparam"
            fi
            echo $'Obtaining certificate for the main domain'
            function_check create_site_certificate
            create_site_certificate "${DEFAULT_DOMAIN_NAME}" 'yes'
            chmod 755 "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.dhparam"

            if [ -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.crt" ]; then
                echo $'Incorrect certificate generated'
                exit 78352
            fi
        fi
        chgrp -R ssl-cert /etc/letsencrypt
        chmod -R g=rX /etc/letsencrypt
    fi


    # Make an ssl cert for the server
    if [ ! -f "/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem" ]; then
        if [ ! -f /etc/ssl/certs/mumble.dhparam ]; then
            "${PROJECT_NAME}-addcert" -h mumble --dhkey "$DH_KEYLENGTH"
            function_check check_certificates
            check_certificates mumble
        fi
    fi

    # Check that the cert was created
    if [ ! -f /etc/ssl/certs/mumble.crt ]; then
        echo $'mumble server certificate not created'
        exit 57892
    fi
    if [ ! -f /etc/ssl/private/mumble.key ]; then
        echo $'mumble server key not created'
        exit 57893
    fi
    if [ ! -d /var/lib/mumble-server ]; then
        mkdir /var/lib/mumble-server
    fi
    cp /etc/ssl/certs/mumble.* /var/lib/mumble-server
    cp /etc/ssl/private/mumble.key /var/lib/mumble-server
    if [ ! -f /var/lib/mumble-server/mumble.pem ]; then
        mv /var/lib/mumble-server/mumble.crt /var/lib/mumble-server/mumble.pem
    fi
    chown -R mumble-server:mumble-server /var/lib/mumble-server

    sed -i "s|welcometext=.*|welcometext=\"<br />Welcome to $DEFAULT_DOMAIN_NAME <b>mumble</b>.<br />Chat freely!<br />\"|g" /etc/mumble-server.ini

    if [[ $MUMBLE_SERVER_PASSWORD ]]; then
        sed -i "s|serverpassword=.*|serverpassword=$MUMBLE_SERVER_PASSWORD|g" /etc/mumble-server.ini
    fi

    sed -i 's|#autobanAttempts.*|autobanAttempts = 10|g' /etc/mumble-server.ini
    sed -i 's|#autobanTimeframe.*|autobanTimeframe = 120|g' /etc/mumble-server.ini
    sed -i 's|#autobanTime.*|autobanTime = 300|g' /etc/mumble-server.ini
    sed -i 's|#sendversion=.*|sendversion=False|g' /etc/mumble-server.ini
    sed -i 's|sendversion=.*|sendversion=False|g' /etc/mumble-server.ini
    if ! grep -q "allowping" /etc/mumble-server.ini; then
        echo 'allowping=False' >> /etc/mumble-server.ini
    fi
    sed -i 's|allowping=.*|allowping=False|g' /etc/mumble-server.ini
    if [ ! -f "/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem" ]; then
        sed -i 's|#sslCert=.*|sslCert=/var/lib/mumble-server/mumble.pem|g' /etc/mumble-server.ini
        sed -i 's|#sslKey=.*|sslKey=/var/lib/mumble-server/mumble.key|g' /etc/mumble-server.ini
    else
        sed -i "s|#sslCert=.*|sslCert=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/mumble-server.ini
        sed -i "s|#sslKey=.*|sslKey=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/mumble-server.ini
    fi
    sed -i 's|#certrequired=.*|certrequired=True|g' /etc/mumble-server.ini
    sed -i 's|users=100|users=10|g' /etc/mumble-server.ini
    sed -i 's|#channelnestinglimit=10|channelnestinglimit=10|g' /etc/mumble-server.ini
    sed -i 's|#textmessagelength=.*|textmessagelength=1000|g' /etc/mumble-server.ini
    sed -i 's|textmessagelength=.*|textmessagelength=1000|g' /etc/mumble-server.ini
    sed -i 's|#imagemessagelength=.*|imagemessagelength=131072|g' /etc/mumble-server.ini
    sed -i 's|#allowhtml=.*|allowhtml=False|g' /etc/mumble-server.ini
    sed -i 's|allowhtml=.*|allowhtml=False|g' /etc/mumble-server.ini
    sed -i "s|port=.*|port=${MUMBLE_PORT}|g" /etc/mumble-server.ini

    #MUMBLE_ONION_HOSTNAME=$(add_onion_service mumble ${MUMBLE_PORT} ${MUMBLE_PORT})
    add_onion_service mumble ${MUMBLE_PORT} ${MUMBLE_PORT}

    # turn off logs by default
    sed -i 's|logfile=.*|logfile=/dev/null|g' /etc/mumble-server.ini

    if [ -d /etc/letsencrypt ]; then
        usermod -a -G ssl-cert mumble-server
    fi

    update_default_domain
    systemctl restart mumble-server

    set_password_for_all_users mumble "$MUMBLE_SERVER_PASSWORD"

    function_check configure_firewall_for_mumble
    configure_firewall_for_mumble
    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0