freedombone/src/freedombone-controlpanel-user

#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# User control panel
#
# License
# =======
#
# Copyright (C) 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/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-controlpanel-user
export TEXTDOMAINDIR="/usr/share/locale"

MY_EMAIL_ADDRESS=$USER@$HOSTNAME
GPG_ID=$(gpg --list-keys "$MY_EMAIL_ADDRESS" | sed -n '2p' | sed 's/^[ \t]*//')
GPG_BACKUP_ID=$(gpg --list-keys "(backup key)" | sed -n '2p' | sed 's/^[ \t]*//')

# If the default key is specified within gpg.conf
if [ -f ~/.gnupg/gpg.conf ]; then
    if grep -q "default-key" ~/.gnupg/gpg.conf; then
        default_gpg_key=$(grep "default-key" ~/.gnupg/gpg.conf)
        if [[ "$default_gpg_key" != *'#'* ]]; then
            default_gpg_key=$(grep "default-key" ~/.gnupg/gpg.conf | awk -F ' ' '{print $2}')
            if [ ${#default_gpg_key} -gt 3 ]; then
                GPG_ID=$(gpg --list-keys "$default_gpg_key" | sed -n '2p' | sed 's/^[ \t]*//')
            fi
        fi
    fi
fi

# Start including files

UTILS_FILES="/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-*"
for f in $UTILS_FILES
do
  source "$f"
done

APP_FILES="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*"
for f in $APP_FILES
do
  source "$f"
done

# End including files

function any_key {
    echo ' '
    # shellcheck disable=SC2034
    read -n1 -r -p $"Press any key to continue..." key
}

function remove_user_from_mailing_list {
    # shellcheck disable=SC1003
    USER_MAILING_LISTS=$(grep '\[' "/home/$USER/.procmailrc" | grep '\]' | awk -F '\[' '{print $2}' | awk -F '\\' '{print $1}')

    i=0
    W=()
    list_name=()
    while read -r listname; do
        i=$((i+1))
        if [[ "$listname" != *']'* && "$listname" != *'['* ]]; then
            W+=("$i" "$listname")
            list_name+=("$listname")
            echo "$listname"
        fi
    done <<< "$USER_MAILING_LISTS"

    i=$((i+1))
    W+=("$i" $"Exit back to filtering rules menu")

    # shellcheck disable=SC2068
    list_selected=$(dialog --default-item "$i" --backtitle $"Freedombone User Control Panel" --title $"Remove yourself from a mailing list" --menu $"Select one of the following:" 24 50 17 ${W[@]} 3>&2 2>&1 1>&3)

    # shellcheck disable=SC2181
    if [ $? -eq 0 ]; then # Exit with OK
        if [ "${list_selected}" -ne "${i}" ]; then
            remove_list_name="${list_name[$((list_selected-1))]}"

            # find the line number where the list is defined
            line_number=0
            i=0
            while read -r line
            do
                if [[ "$line" == *"\\[${remove_list_name}\\]"* ]]; then
                    line_number=${i}
                fi
                i=$((i+1))
            done < "/home/$USER/.procmailrc"

            if [ ${line_number} -eq 0 ]; then
                # no match was found
                return
            fi

            # recreate the file
            if [ -f "/home/${USER}/.procmailrc_new" ]; then
                rm "/home/${USER}/.procmailrc_new"
            fi
            i=0
            clip=0
            while read -r line
            do
                i=$((i+1))
                if [ ${i} -gt $((line_number-1)) ]; then
                    if [ ${clip} -eq 0 ]; then
                        clip=1
                    fi
                    if [ ${clip} -eq 1 ]; then
                        if [ ${i} -lt $((line_number+2)) ]; then
                            continue
                        else
                            if [ ${#line} -lt 1 ]; then
                                clip=2
                                continue
                            fi
                            if [[ "$line" == ":"* || "$line" == "#"* ]]; then
                                clip=2
                            else
                                continue
                            fi
                        fi
                    fi
                fi

                echo "$line" >> "/home/${USER}/.procmailrc_new"

                if [[ "$line" == *"\\[${remove_list_name}\\]"* ]]; then
                    line_number=${i}
                fi
            done < "/home/$USER/.procmailrc"
            cp "/home/${USER}/.procmailrc_new" "/home/${USER}/.procmailrc"
            rm "/home/${USER}/.procmailrc_new"
            chown "${USER}":"${USER}" "/home/${USER}/.procmailrc"
            dialog --title $"Remove yourself from mailing list" \
                   --msgbox $"You have been removed from ${remove_list_name}" 6 50
        fi
    fi
}

function add_to_mailing_list {
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone User Control Panel" \
           --title $"Subscribe to a mailing list" \
           --form $"You can either enter a subject or an email address\\n" 11 68 4 \
           $"List folder name:" 1 1 "" 1 35 26 25 \
           $"Name between [] on subject line:" 2 1 "" 2 35 26 25 \
           $"List email address:" 3 1 "" 3 35 26 25 \
           $"Public:" 4 1 $"yes" 4 35 4 25 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    LIST_NAME=$(sed -n 1p < "$data")
    LIST_SUBJECT=$(sed -n 2p < "$data")
    LIST_EMAIL=$(sed -n 3p < "$data")
    LIST_PUBLIC=$(sed -n 4p < "$data")

    if [ ${#LIST_PUBLIC} -lt 1 ]; then
        LIST_PUBLIC='no'
    fi
    if [[ $LIST_PUBLIC == $'y' || $LIST_PUBLIC == $'Y' || $LIST_PUBLIC == $'true' || $LIST_PUBLIC == $'True' || $LIST_PUBLIC == $'yes' || $LIST_PUBLIC == $'Yes' || $LIST_PUBLIC == $'YES' ]]; then
        LIST_PUBLIC='yes'
    else
        LIST_PUBLIC='no'
    fi
    if [ ${#LIST_NAME} -lt 2 ]; then
        dialog --title $"Add mailing list" \
               --msgbox $"No mailing list name was given" 6 40
        rm -f "$data"
        return
    fi
    if [ ${#LIST_SUBJECT} -lt 2 ]; then
        if [ ${#LIST_EMAIL} -lt 2 ]; then
            dialog --title $"Add mailing list" \
                   --msgbox $"No mailing list subject or address was given" 6 40
            rm -f "$data"
            return
        fi
    fi
    if [ ${#LIST_SUBJECT} -gt 1 ]; then
        "${PROJECT_NAME}-addlist" -u "$USER" -l "$LIST_NAME" \
                       -s "$LIST_SUBJECT" --public "$LIST_PUBLIC"
    else
        if [[ "$LIST_EMAIL" != *"@"* || "$LIST_EMAIL" != *"."* ]]; then
            dialog --title $"Add mailing list" \
                   --msgbox $"Unrecognised email address" 6 40
            rm -f "$data"
            return
        else
            "${PROJECT_NAME}-addlist" -u "$USER" -l "$LIST_NAME" \
                           -e "$LIST_EMAIL" --public "$LIST_PUBLIC"
        fi
    fi

    dialog --title $"Add mailing list" \
           --msgbox $"$LIST_NAME list was added" 6 40
    rm -f "$data"
}

function email_rule_address {
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone User Control Panel" \
           --title $"Create an email rule" \
           --form "\\n" 9 65 4 \
           $"When email arrives from address:" 1 1 "" 1 35 24 28 \
           $"Move to folder:" 2 1 "" 2 35 24 28 \
           $"Public:" 3 1 $"no" 3 35 4 25 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    RULE_EMAIL=$(sed -n 1p < "$data")
    RULE_FOLDER=$(sed -n 2p < "$data")
    RULE_PUBLIC=$(sed -n 3p < "$data")

    if [ ${#RULE_PUBLIC} -lt 1 ]; then
        RULE_PUBLIC='no'
    fi
    if [[ $RULE_PUBLIC == $'y' || $RULE_PUBLIC == $'Y' || $RULE_PUBLIC == $'true' || $RULE_PUBLIC == $'True' || $RULE_PUBLIC == $'yes' || $RULE_PUBLIC == $'Yes' || $RULE_PUBLIC == $'YES' ]]; then
        RULE_PUBLIC='yes'
    else
        RULE_PUBLIC='no'
    fi
    if [ ${#RULE_EMAIL} -lt 2 ]; then
        dialog --title $"Create an email rule" \
               --msgbox $"No email address was given" 6 40
        rm -f "$data"
        return
    fi
    if [ ${#RULE_FOLDER} -lt 2 ]; then
        dialog --title $"Create an email rule" \
               --msgbox $"No folder name was given" 6 40
        rm -f "$data"
        return
    fi
    if [[ "$RULE_EMAIL" != *"@"* || "$RULE_EMAIL" != *"."* ]]; then
        dialog --title $"Create an email rule" \
               --msgbox $"Unrecognised email address" 6 40
        rm -f "$data"
        return
    fi

    "${PROJECT_NAME}-addemail" -u "$USER" -e "$RULE_EMAIL" \
                   -g "$RULE_FOLDER" --public $RULE_PUBLIC
    dialog --title $"Create an email rule" \
           --msgbox $"Email rule for $RULE_EMAIL was added" 6 40
    rm -f "$data"
}

function gpg_set_trust {
    TRUST_ADDRESS=$1
    fpr=$(gpg --with-colons --fingerprint "$TRUST_ADDRESS" | grep fpr | head -n 1 | awk -F ':' '{print $10}')
    if [ ${#fpr} -gt 2 ]; then

        W=(1 $"I don't know or won't say"
           2 $"I do NOT trust"
           3 $"I trust marginally"
           4 $"I trust fully"
           5 $"I trust ultimately")

        # shellcheck disable=SC2068
        TRUST_LEVEL=$(dialog --backtitle $"Freedombone User Control Panel" --title $"Trust a PGP/GPG key or website domain" --menu $"Set the trust level for $TRUST_ADDRESS:" 18 70 10 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$TRUST_LEVEL" ]; then
            return;
        fi

        if echo -e "trust\\n${TRUST_LEVEL}\\ny\\nsave\\n" | gpg --command-fd 0 --edit-key "$fpr"; then
            gpg --update-trustdb
            dialog --title $"Trust a PGP/GPG key or website domain" \
                   --backtitle $"Freedombone User Control Panel" \
                   --msgbox $"$TRUST_ADDRESS was set to trust level ${TRUST_LEVEL}" 6 50
        fi
    fi
}

function email_rule_subject {
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone User Control Panel" \
           --title $"Create an email rule" \
           --form "\\n" 9 75 4 \
           $"When email arrives with subject containing:" 1 1 "" 1 45 24 28 \
           $"Move to folder:" 2 1 "" 2 45 24 28 \
           $"Public:" 3 1 $"no" 3 45 4 25 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    RULE_SUBJECT=$(sed -n 1p < "$data")
    RULE_FOLDER=$(sed -n 2p < "$data")
    RULE_PUBLIC=$(sed -n 3p < "$data")

    if [ ${#RULE_PUBLIC} -lt 1 ]; then
        RULE_PUBLIC='no'
    fi
    if [[ $RULE_PUBLIC == $'y' || $RULE_PUBLIC == $'Y' || $RULE_PUBLIC == $'true' || $RULE_PUBLIC == $'True' || $RULE_PUBLIC == $'yes' || $RULE_PUBLIC == $'Yes' || $RULE_PUBLIC == $'YES' ]]; then
        RULE_PUBLIC='yes'
    else
        RULE_PUBLIC='no'
    fi
    if [ ${#RULE_SUBJECT} -lt 2 ]; then
        dialog --title $"Create an email rule" \
               --msgbox $"No subject text was given" 6 40
        rm -f "$data"
        return
    fi
    if [ ${#RULE_FOLDER} -lt 2 ]; then
        dialog --title $"Create an email rule" \
               --msgbox $"No folder name was given" 6 40
        rm -f "$data"
        return
    fi

    "${PROJECT_NAME}-addemail" -u "$USER" -s "$RULE_SUBJECT" \
                   -g "$RULE_FOLDER" --public "$RULE_PUBLIC"
    dialog --title $"Create an email rule" \
           --msgbox $"Email rule for subject '$RULE_SUBJECT' was added" 6 40
    rm -f "$data"
}

function block_unblock_email {
    blockstr=$"Block or unblock emails from a given address"
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone User Control Panel" \
           --title "$blockstr" \
           --form "\\n" 8 65 3 \
           $"When email arrives from address:" 1 1 "" 1 35 24 100 \
           $"Block it:" 2 1 "yes" 2 35 4 4 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    BLOCK_EMAIL=$(sed -n 1p < "$data")
    BLOCK=$(sed -n 2p < "$data")
    if [ ${#BLOCK_EMAIL} -lt 2 ]; then
        dialog --title "$blockstr" \
               --msgbox $"No email address was given" 6 40
        return
    fi
    if [[ "$BLOCK_EMAIL" != *"@"* || "$BLOCK_EMAIL" != *"."* ]]; then
        dialog --title "$blockstr" \
               --msgbox $"Unrecognised email address" 6 40
        rm -f "$data"
        return
    fi
    if [[ $BLOCK == "y"* || $BLOCK == "Y"* ]]; then
        "${PROJECT_NAME}-ignore" -u "$USER" -e "$BLOCK_EMAIL"
        dialog --title $"Block an email" \
               --msgbox "Email from $BLOCK_EMAIL is now blocked" 6 75
    else
        "${PROJECT_NAME}-unignore" -u "$USER" -e "$BLOCK_EMAIL"
        dialog --title $"Unblock an email" \
               --msgbox "Email from $BLOCK_EMAIL is now unblocked" 6 75
    fi
    rm -f "$data"
}

function block_unblock_subject {
    blockstr=$"Block or unblock emails with text in the subject line"
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone User Control Panel" \
           --title "$blockstr" \
           --form "\\n" 8 70 3 \
           $"When email arrives with subject text:" 1 1 "" 1 40 24 28 \
           $"Block it:" 2 1 "yes" 2 40 4 4 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    BLOCK_SUBJECT=$(sed -n 1p < "$data")
    BLOCK=$(sed -n 2p < "$data")
    if [ ${#BLOCK_SUBJECT} -lt 2 ]; then
        dialog --title "$blockstr" \
               --msgbox $"No subject was given" 6 40
        rm -f "$data"
        return
    fi
    if [[ $BLOCK == "y"* || $BLOCK == "Y"* ]]; then
        "${PROJECT_NAME}-ignore" -u "$USER" -t "$BLOCK_SUBJECT"
        dialog --title $"Block an email" \
               --msgbox $"Email with subject $BLOCK_SUBJECT is now blocked" 6 40
    else
        "${PROJECT_NAME}-unignore" -u "$USER" -t "$BLOCK_SUBJECT"
        dialog --title $"Unblock an email" \
               --msgbox $"Email with subject $BLOCK_SUBJECT is now unblocked" 6 40
    fi
    rm -f "$data"
}

function show_gpg_key {
    GPG_FINGERPRINT=$(gpg --fingerprint "$GPG_ID" | sed -n '2p' | sed 's/^[ \t]*//')
    GPG_DATE=$(gpg --fingerprint "$GPG_ID" | grep -i "pub" | head -n 1 | awk -F ' ' '{print $3}')
    dialog --title $"My PGP/GPG Key" \
           --backtitle $"Freedombone User Control Panel" \
           --msgbox $"Email Address: $MY_EMAIL_ADDRESS\\n\\nKey ID: $GPG_ID\\n\\nFingerprint: $GPG_FINGERPRINT\\n\\nCreated: $GPG_DATE" 12 70
    clear
    echo $"Your GPG/PGP public key:"
    gpg --armor --export "$GPG_ID" | qrencode -t UTF8
    any_key
}

function show_full_gpg_key {
    clear
    echo ''
    echo ''
    echo ''
    gpg --armor --export "$GPG_ID"
    echo ''
    echo ''
    echo ''
    gpg --armor --export-secret-key "$GPG_ID"
    any_key
}

function publish_gpg_key {
    gpg --send-key "$GPG_ID"
    if [ "$GPG_BACKUP_ID" ]; then
        gpg --send-key "$GPG_BACKUP_ID"
    fi
    dialog --title $"Publish your PGP/GPG key" \
           --msgbox $"Your key has now been published" 6 40
}

function refresh_gpg_keys {
    gpg --refresh-keys
    dialog --title $"Refresh PGP/GPG keys" \
           --msgbox $"Your keys have been refreshed" 6 40
}

function add_gpg_key {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Enter email address, Key ID or full key below" \
           --backtitle $"Freedombone User Control Panel" \
           --editbox "$data" 8 60
    sel=$?
    case $sel in
        0)
            ADD_EMAIL_ADDRESS=$(<"$data")
            if [ ${#ADD_EMAIL_ADDRESS} -gt 2 ]; then

                address_is_valid=

                if [[ "$ADD_EMAIL_ADDRESS" == *"@"* && "$ADD_EMAIL_ADDRESS" == *"."* ]]; then
                    address_is_valid=1
                fi
                if [[ "$ADD_EMAIL_ADDRESS" == "0x"* ]]; then
                    address_is_valid=1
                fi
                publicstr=$"BEGIN PGP PUBLIC KEY BLOCK"
                if [[ "$ADD_EMAIL_ADDRESS" == *"$publicstr"* ]]; then
                    address_is_valid=1
                fi

                if [ $address_is_valid ]; then
                    clear
                    if [[ "$ADD_EMAIL_ADDRESS" == *"$publicstr"* ]]; then
                        echo "$ADD_EMAIL_ADDRESS" | gpg --import
                        dialog --title $"Add someone's PGP/GPG key" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"GPG public key was imported" 6 50
                    else
                        gpg --search-keys "$ADD_EMAIL_ADDRESS"
                        gpg_set_trust "$ADD_EMAIL_ADDRESS"
                    fi
                else
                    dialog --title $"Unrecognised email address" \
                           --backtitle $"Freedombone User Control Panel" \
                           --msgbox $"This doesn't look like an email address or key ID" 6 50
                fi
            fi
            ;;
    esac
    rm "$data"
}

function remove_gpg_key {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Remove someone's PGP/GPG key" \
           --backtitle $"Freedombone User Control Panel" \
           --inputbox $"Enter their email address or key ID below" 8 60 2>"$data"
    sel=$?
    case $sel in
        0)
            REMOVE_EMAIL_ADDRESS=$(<"$data")
            if [ ${#REMOVE_EMAIL_ADDRESS} -gt 2 ]; then
                if [[ $REMOVE_EMAIL_ADDRESS == *"@"* && $REMOVE_EMAIL_ADDRESS == *"."* ]]; then
                    if [[ "$REMOVE_EMAIL_ADDRESS" != "$MY_EMAIL_ADDRESS" ]]; then
                        clear
                        gpg --delete-key "$REMOVE_EMAIL_ADDRESS"
                    else
                        dialog --title $"Remove someone's PGP/GPG key" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"It's not a good idea to remove your own encryption key" 6 65
                    fi
                else
                    if [[ $REMOVE_EMAIL_ADDRESS == "0x"* ]]; then
                        clear
                        gpg --delete-key "$REMOVE_EMAIL_ADDRESS"
                    else
                        dialog --title $"Unrecognised email address" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"This doesn't look like an email address" 6 50
                    fi
                fi
            fi
            ;;
    esac
    rm -f "$data"
}

function add_ssh_key {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Add an ssh key for logging in" \
           --backtitle $"Freedombone User Control Panel" \
           --inputbox $"This will allow you to log into ${PROJECT_NAME} if you have an ssh key on your system, and provides much stronger security than simply using a login password.\\n\\nWARNING: If you make any mistakes here then you may not be able to log in and will need to get the administrator to clear your ssh authorized_keys file." 15 60 2>"$data"
    sel=$?
    case $sel in
        0)
            SSH_PUBLIC_KEY=$(<"$data")
            if [ ${#SSH_PUBLIC_KEY} -gt 20 ]; then
                if [[ "$SSH_PUBLIC_KEY" == "ssh-"* ]]; then
                    if [ ! -d "/home/$USER/.ssh" ]; then
                        mkdir "/home/$USER/.ssh"
                    fi
                    if [ ! -f "/home/$USER/.ssh/authorized_keys" ]; then
                        touch "/home/$USER/.ssh/authorized_keys"
                    fi
                    if ! grep -q "$SSH_PUBLIC_KEY" "/home/$USER/.ssh/authorized_keys"; then
                        echo "$SSH_PUBLIC_KEY" >> "/home/$USER/.ssh/authorized_keys"
                        dialog --title $"New ssh key added" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"Your ssh key has now been added" 6 50
                    else
                        dialog --title $"ssh key already added" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"That ssh key has already been added" 6 50
                    fi
                else
                    dialog --title $"Unrecognised ssh public key" \
                           --backtitle $"Freedombone User Control Panel" \
                           --msgbox $"This doesn't look like an ssh key" 6 50
                fi
            fi
            ;;
    esac
    rm -f "$data"
}

function remove_ssh_key {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Remove an ssh key for logging in" \
           --backtitle $"Freedombone User Control Panel" \
           --inputbox $"Enter the ssh public key which is to be removed. This can be just the address at the end.\\n\\nWARNING: If you make any mistakes here then you may not be able to log in and will need to get the administrator to clear your ssh authorized_keys file." 15 60 2>"$data"
    sel=$?
    case $sel in
        0)
            SSH_PUBLIC_KEY=$(<"$data")
            if [ ${#SSH_PUBLIC_KEY} -gt 5 ]; then
                if [ -f "/home/$USER/.ssh/authorized_keys" ]; then
                    sed -i "s|.*${SSH_PUBLIC_KEY}.*||g" "/home/$USER/.ssh/authorized_keys"
                    dialog --title $"Remove an ssh public key" \
                           --backtitle $"Freedombone User Control Panel" \
                           --msgbox $"The ssh key has been removed" 6 50
                fi
            fi
            ;;
    esac
    rm -f "$data"
}

function smtp_proxy {
    MUTTRC_FILE=/home/$USER/.muttrc
    if [ ! -f "$MUTTRC_FILE" ]; then
        return
    fi
    SMTP_PROXY_ENABLE=$'no'
    SMTP_PROXY_PROTOCOL='smtps'
    SMTP_PROXY_SERVER='mail.myispdomain'
    SMTP_PROXY_PORT=465
    SMTP_PROXY_USERNAME=''
    SMTP_PROXY_PASSWORD=''

    if grep -q "set smtp_url" "$MUTTRC_FILE"; then
        if grep -q "#set smtp_url" "$MUTTRC_FILE"; then
            SMTP_PROXY_ENABLE=$'no'
        else
            SMTP_PROXY_ENABLE=$'yes'
        fi
        SMTP_PROXY_PROTOCOL=$(grep "set smtp_url" "$MUTTRC_FILE" | awk -F '"' '{print $2}' | awk -F ':' '{print $1}')
        SMTP_PROXY_SERVER=$(grep "set smtp_url" "$MUTTRC_FILE" | awk -F '"' '{print $2}' | awk -F '/' '{print $3}' | awk -F ':' '{print $2}' | awk -F '@' '{print $2}')
        SMTP_PROXY_PORT=$(grep "set smtp_url" "$MUTTRC_FILE" | awk -F ':' '{print $4}' | awk -F '/' '{print $1}')
        SMTP_PROXY_USERNAME=$(grep "set smtp_url" "$MUTTRC_FILE" | awk -F '"' '{print $2}' | awk -F '/' '{print $3}' | awk -F ':' '{print $1}')
        SMTP_PROXY_PASSWORD=$(grep "set smtp_url" "$MUTTRC_FILE" | awk -F '"' '{print $2}' | awk -F '/' '{print $3}' | awk -F ':' '{print $2}' | awk -F '@' '{print $1}')
    fi

    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"SMTP Proxy for $USER" \
           --form $"You may need to proxy outgoing email via your ISP's mail server. If so enter the details below." 14 75 6 \
           $"Enable proxy:" 1 1 "$SMTP_PROXY_ENABLE" 1 24 5 5 \
           $"Protocol (smtp/smtps):" 2 1 "$SMTP_PROXY_PROTOCOL" 2 24 5 5 \
           $"ISP mail server:" 3 1 "$SMTP_PROXY_SERVER" 3 24 40 10000 \
           $"Port:" 4 1 "$SMTP_PROXY_PORT" 4 24 5 5 \
           $"Username:" 5 1 "$SMTP_PROXY_USERNAME" 5 24 40 10000 \
           $"Password:" 6 1 "$SMTP_PROXY_PASSWORD" 6 24 40 10000 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    SMTP_PROXY_ENABLE=$(sed -n 1p < "$data")
    SMTP_PROXY_PROTOCOL=$(sed -n 2p < "$data")
    SMTP_PROXY_SERVER=$(sed -n 3p < "$data")
    SMTP_PROXY_PORT=$(sed -n 4p < "$data")
    SMTP_PROXY_USERNAME=$(sed -n 5p < "$data")
    SMTP_PROXY_PASSWORD=$(sed -n 6p < "$data")

    # change muttrc
    if [ "$SMTP_PROXY_ENABLE" != $'no' ]; then
        if ! grep -q "set smtp_url" "$MUTTRC_FILE"; then
            echo "set smtp_url=\"${SMTP_PROXY_PROTOCOL}://${SMTP_PROXY_USERNAME}:${SMTP_PROXY_PASSWORD}@${SMTP_PROXY_SERVER}:${SMTP_PROXY_PORT}/\"" >> "$MUTTRC_FILE"
        else
            sed -i "s|set smtp_url=.*|set smtp_url=\"${SMTP_PROXY_PROTOCOL}://${SMTP_PROXY_USERNAME}:${SMTP_PROXY_PASSWORD}@${SMTP_PROXY_SERVER}:${SMTP_PROXY_PORT}/\"|g" "$MUTTRC_FILE"
        fi
        sed -i 's|#set smtp_url|set smtp_url|g' "$MUTTRC_FILE"
    else
        if grep -q "set smtp_url" "$MUTTRC_FILE"; then
            sed -i 's|set smtp_url|#set smtp_url|g' "$MUTTRC_FILE"
        fi
    fi
    rm -f "$data"
}

function sign_gpg_key {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Sign a PGP/GPG key or website domain" \
           --backtitle $"Freedombone User Control Panel" \
           --inputbox $"Enter the Key ID, address or domain to be signed.\\n\\nIf you are signing a website domain then include the https:// at the beginning.\\n\\nIf you are signing an ssh key then include ssh:// before the domain name." 14 75 2>"$data"
    sel=$?
    case $sel in
        0)
            SIGN_ADDRESS=$(<"$data")
            if [ ${#SIGN_ADDRESS} -gt 2 ]; then
                clear
                gpg --search "$SIGN_ADDRESS"
                fpr=$(gpg --with-colons --fingerprint "$SIGN_ADDRESS" | grep fpr | head -n 1 | awk -F ':' '{print $10}')
                if [ ${#fpr} -gt 2 ]; then
                    if gpg --sign-key "$fpr"; then
                        gpg --update-trustdb
                        dialog --title $"Sign a PGP/GPG key" \
                               --backtitle $"Freedombone User Control Panel" \
                               --msgbox $"$SIGN_ADDRESS was signed" 6 50
                    fi
                fi
            fi
            ;;
    esac
    rm -f "$data"
}


function gpg_key_trust {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Trust a PGP/GPG key or website domain" \
           --backtitle $"Freedombone User Control Panel" \
           --inputbox $"Enter the Key ID, address or domain to be trusted.\\n\\nIf you are trusting a website domain then include the https:// at the beginning.\\n\\nIf you are trusting an ssh key then include ssh:// before the domain name." 14 75 2>"$data"
    sel=$?
    case $sel in
        0)
            TRUST_ADDRESS=$(<"$data")
            if [ ${#TRUST_ADDRESS} -gt 2 ]; then
                clear
                gpg --search "$TRUST_ADDRESS"
                gpg_set_trust "$TRUST_ADDRESS"
            fi
            ;;
    esac
    rm -f "$data"
}

function menu_encryption_keys {
    while true
    do
        W=(1 $"Show your PGP/GPG key"
           2 $"Show your full PGP/GPG key, including private key"
           3 $"Publish your PGP/GPG key so that others can find it"
           4 $"Add someone's PGP/GPG key"
           5 $"Remove someone's PGP/GPG key"
           6 $"Sign a PGP/GPG key or website domain"
           7 $"Refresh your PGP/GPG keys"
           8 $"Add an ssh key for logging in"
           9 $"Remove an ssh key for logging in"
           10 $"Set the trust level for a PGP/GPG key")

        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone User Control Panel" --title $"My Encryption Keys" --menu $"Choose an operation, or ESC for main menu:" 19 70 11 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi

        case $selection in
            1) show_gpg_key;;
            2) show_full_gpg_key;;
            3) publish_gpg_key;;
            4) add_gpg_key;;
            5) remove_gpg_key;;
            6) sign_gpg_key;;
            7) refresh_gpg_keys;;
            8) add_ssh_key;;
            9) remove_ssh_key;;
            10) gpg_key_trust;;
        esac
    done
}

function menu_email {
    while true
    do
        W=(1 $"Add yourself to a mailing list"
           2 $"Remove yourself from a mailing list"
           3 $"Add an email rule for an address"
           4 $"Add an email rule for a subject"
           5 $"Block or unblock an email address"
           6 $"Block or unblock email with subject text")

        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone User Control Panel" --title $"Change Email Filtering Rules" --menu $"Choose an operation, or ESC for main menu:" 14 70 7 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi

        case $selection in
            1) add_to_mailing_list;;
            2) remove_user_from_mailing_list;;
            3) email_rule_address;;
            4) email_rule_subject;;
            5) block_unblock_email;;
            6) block_unblock_subject;;
        esac
    done
}

function menu_admin {
    if [ ! -f /etc/sudoers ]; then
        clear
        exit 0
    fi
    sudo /usr/local/bin/control
}

function sign_keys {
    if [ ! -f "/home/$USER/.monkeysphere/server_keys" ]; then
        return
    fi

    dialog --title $"Monkeysphere sign server keys" \
           --backtitle $"Freedombone Security Configuration" \
           --defaultno \
           --yesno $"\\nMonkeysphere has been enabled and you will need to sign and trust the server keys. Do you want to do that now?" 8 60
    sel=$?
    case $sel in
        0) "${PROJECT_NAME}-sec" --sign yes;;
    esac
}

function menu_run_client_app {
    detect_installable_apps

    W=()
    appnames=()
    n=1
    app_index=0
    # shellcheck disable=SC2068
    for a in ${APPS_AVAILABLE[@]}
    do
        if [[ ${APPS_INSTALLED[$app_index]} != "0" ]]; then
            if [[ $(function_exists "run_client_${a}") == "1" ]]; then
                W+=("$n" "$a")
                n=$((n+1))
                appnames+=("$a")
            fi
        fi
        app_index=$((app_index+1))
    done
    if [ $n -le 1 ]; then
        return
    fi

    # shellcheck disable=SC2086
    selection=$(dialog --backtitle $"Freedombone" --title $"Run an App" --menu $"Choose an operation, or ESC for main menu:" 16 70 20 "${W[@]}" 3>&2 2>&1 1>&3)

    if [ ! "$selection" ]; then
        return
    fi

    app_index=$((selection-1))
    chosen_app=${appnames[$app_index]}
    "run_client_${chosen_app}"
}

function show_your_email_address {
    GPG_FINGERPRINT=$(gpg --fingerprint "$GPG_ID" | sed -n '2p' | sed 's/^[ \t]*//')
    GPG_DATE=$(gpg --fingerprint "$GPG_ID" | grep -i "pub" | head -n 1 | awk -F ' ' '{print $3}')
    onion_domain=
    if [ -f "$HOME/.email_onion_domain" ]; then
        onion_domain=$(cat "$HOME/.email_onion_domain")
    fi
    dialog_height=14
    onionemailstr=
    if [[ "$HOSTNAME" != *'.onion' && "$onion_domain" ]]; then
        onionemailstr="\\n\\nOnion Email: ${USER}@${onion_domain}"
        dialog_height=$((dialog_height+3))
    fi
    msgstrbase=$"\\nYou can press SHIFT and then drag the mouse and right click to copy.\\n\\nEmail Address: ${MY_EMAIL_ADDRESS}${onionemailstr}\\n\\nKey ID: ${GPG_ID}\\n\\nFingerprint: ${GPG_FINGERPRINT}\\n\\nCreated: ${GPG_DATE}"
    bdsmail_address=
    bdsmailstr=
    if [ -f ~/.mutt/bdsmail ]; then
        bdsmail_address=$(grep 'set from=' ~/.mutt/bdsmail | awk -F '=' '{print $2}')
        bdsmailstr="\\n\\nI2P Address: ${bdsmail_address}"
        dialog_height=$((dialog_height+3))
    fi

    dialog --title $"Show your Email Address" \
           --backtitle $"Freedombone User Control Panel" \
           --msgbox "${msgstrbase}${bdsmailstr}" $dialog_height 100

    if [ "$onion_domain" ]; then
        clear
        echo ''
        echo $'Your onion email address:'
        echo ''
        echo -n "${USER}@${onion_domain}" | qrencode -t UTF8
        echo ''
        any_key
    fi
    if [ "${bdsmail_address}" ]; then
        clear
        echo ''
        echo $'Your bdsmail address:'
        echo ''
        echo -n "${bdsmail_address}" | qrencode -t UTF8
        echo ''
        any_key
    fi
}

function menu_top_level {
    while true
    do
        W=(1 $"Use Email"
           2 $"Show your Email Address"
           3 $"Change Email Filtering/Blocking Rules"
           4 $"Run an App"
           5 $"Browse the Web"
           6 $"My Encryption Keys"
           7 $"Set an outgoing email proxy"
           8 $"Administrator controls"
           9 $"Exit to the command line")

        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone User Control Panel" --title $"User Control Panel" --menu $"Choose an operation, or ESC to log out:" 20 60 13 "${W[@]}" 3>&2 2>&1 1>&3)
        if [ ! "$selection" ]; then
            kill -HUP "$(pgrep -s 0 -o)"
        fi

        case $selection in
            1) mutt;;
            2) show_your_email_address;;
            3) menu_email;;
            4) menu_run_client_app;;
            5) torify elinks -no-home;;
            6) menu_encryption_keys;;
            7) smtp_proxy;;
            8) menu_admin;;
            9) break;;
        esac
    done
}

sign_keys
gpg_agent_enable "$USER"
menu_top_level
clear
# shellcheck disable=SC1090
. ~/.bashrc
cat /etc/motd
echo -e $'Type "sudo su" for root access, or "control" to restart\nthe control panel.'
echo ''
exit 0