#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Pleroma backend application
# https://git.pleroma.social/pleroma/pleroma/wikis/Installing-on-Debian-Based-Distributions
#
# Show stopper: This is dependent on https://placehold.it for avatar images,
# so at present it's not usable until a first party placeholder image system
# is included.
#
# There is also a possible issue with the chat system which uses an object called
# "Agent" which may not be supported with the version of elixir within the
# Debian package. This only applies if you're installing from the latest commit.
#
# License
# =======
#
# Copyright (C) 2017-2018 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 social'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

PLEROMA_DOMAIN_NAME=
PLEROMA_CODE=
PLEROMA_PORT=4000
PLEROMA_ONION_PORT=8011
PLEROMA_REPO="https://git.pleroma.social/pleroma/pleroma.git"
PLEROMA_COMMIT='80f6ac412a632da090be9f3d86971eac0b95a53d'
PLEROMA_ADMIN_PASSWORD=
PLEROMA_DIR=/etc/pleroma
PLEROMA_SECRET_KEY=""

PLEROMA_BACKGROUND_IMAGE_URL=

PLEROMA_TITLE='Pleroma Server'

# Number of months after which posts expire
PLEROMA_EXPIRE_MONTHS=3
pleroma_expire_posts_script=/usr/bin/pleroma-expire-posts
blocking_script_file=/usr/bin/pleroma-blocking

pleroma_variables=(ONION_ONLY
                   PLEROMA_DOMAIN_NAME
                   PLEROMA_CODE
                   PLEROMA_WELCOME_MESSAGE
                   PLEROMA_BACKGROUND_IMAGE_URL
                   DDNS_PROVIDER
                   PLEROMA_TITLE
                   PLEROMA_EXPIRE_MONTHS
                   MY_EMAIL_ADDRESS
                   MY_USERNAME)

function create_pleroma_blocklist {
    echo '#!/bin/bash' > $blocking_script_file
    echo "if [ ! -f /root/${PROJECT_NAME}-firewall-domains.cfg ]; then" >> $blocking_script_file
    echo '    exit 0' >> $blocking_script_file
    echo 'fi' >> $blocking_script_file
    echo 'cd /etc/postgresql' >> $blocking_script_file
    echo 'while read blocked; do' >> $blocking_script_file
    echo '    if [[ "$blocked" == *"."* || "$blocked" == *"@"* ]]; then' >> $blocking_script_file
    echo '        if [ ${#blocked} -gt 4 ]; then' >> $blocking_script_file
    echo "            sudo -u postgres psql -d pleroma -c \"DELETE FROM objects WHERE data->>'content' ilike '%\${blocked}%' or data->>'actor' ilike '%\${blocked}%' or data->>'to' ilike '%\${blocked}%' or data->>'id' ilike '%\${blocked}%' or data->>'external_url' ilike '%\${blocked}%'\"" >> $blocking_script_file
    echo "            sudo -u postgres psql -d pleroma -c \"DELETE FROM users WHERE nickname ilike '%\${blocked}%'\"" >> $blocking_script_file
    echo '            if [[ "$blocked" != *"@"* ]]; then' >> $blocking_script_file
    echo "                sudo -u postgres psql -d pleroma -c \"DELETE FROM websub_server_subscriptions WHERE callback like '%\${blocked}%'\"" >> $blocking_script_file
    echo '            fi' >> $blocking_script_file
    echo '        fi' >> $blocking_script_file
    echo '    fi' >> $blocking_script_file
    echo "done </root/${PROJECT_NAME}-firewall-domains.cfg" >> $blocking_script_file
    chmod +x $blocking_script_file

    if ! grep -q "$blocking_script_file" /etc/crontab; then
        echo "*/2            * *   *   *   root $blocking_script_file > /dev/null" >> /etc/crontab
    fi
}

function expire_pleroma_posts {
    domain_name=$1
    expire_months=$3

    if [ ! $expire_months ]; then
        expire_months=3
    fi

    expire_days=$((expire_months * 30))

    # files are what take up most of the backup time, so don't keep them for very long
    expire_days_files=7

    # To prevent the database size from growing endlessly this script expires posts
    # after a number of months
    if [ ! -d /etc/pleroma ]; then
        return
    fi

    echo '#!/bin/bash' > $pleroma_expire_posts_script
    echo "plmonths=\"$PLEROMA_EXPIRE_MONTHS\"" >> $pleroma_expire_posts_script
    echo 'if [ ${#plmonths} -eq 0 ]; then' >> $pleroma_expire_posts_script
    echo '    exit 1' >> $pleroma_expire_posts_script
    echo 'fi' >> $pleroma_expire_posts_script
    echo 'if [[ "$plmonths" == "0" ]]; then' >> $pleroma_expire_posts_script
    echo '    exit 2' >> $pleroma_expire_posts_script
    echo 'fi' >> $pleroma_expire_posts_script
    echo 'oldate=$(date +%Y-%m-%d --date="$plmonths months ago")' >> $pleroma_expire_posts_script
    echo 'cd /etc/postgresql' >> $pleroma_expire_posts_script
    echo "sudo -u postgres psql -d pleroma -c \"DELETE FROM notifications WHERE inserted_at <= '\$oldate 01:01:01'\"" >> $pleroma_expire_posts_script
    echo "sudo -u postgres psql -d pleroma -c \"DELETE FROM objects WHERE inserted_at <= '\$oldate 01:01:01'\"" >> $pleroma_expire_posts_script
    chmod +x $pleroma_expire_posts_script

    pleroma_expire_script=/etc/cron.daily/pleroma-expire
    echo '#!/bin/bash' > $pleroma_expire_script
    echo "find /etc/pleroma/uploads/* -mtime +${expire_days_files} -exec rm -rf {} +" >> $pleroma_expire_script
    echo "$pleroma_expire_posts_script 2> /dev/null" >> $pleroma_expire_script
    chmod +x $pleroma_expire_script

    # remove any old cron job
    if grep -q "pleroma-expire" /etc/crontab; then
        sed -i "/pleroma-expire/d" /etc/crontab
        rm /usr/bin/pleroma-expire
    fi

    # remove old expire script
    if [ -f /etc/cron.weekly/clear-pleroma-database ]; then
        rm /etc/cron.weekly/clear-pleroma-database
    fi
}

function pleroma_recompile {
    # necessary after parameter changes
    chown -R pleroma:pleroma $PLEROMA_DIR
    sudo -u pleroma mix clean
    sudo -u pleroma mix deps.compile
    sudo -u pleroma mix compile

    if [ -f /etc/systemd/system/pleroma.service ]; then
        systemctl restart pleroma
    fi

}

function logging_on_pleroma {
    echo -n ''
}

function logging_off_pleroma {
    echo -n ''
}

function remove_user_pleroma {
    remove_username="$1"

    ${PROJECT_NAME}-pass -u $remove_username --rmapp pleroma
}

function add_user_pleroma {
    new_username="$1"
    new_user_password="$2"

    ${PROJECT_NAME}-pass -u $new_username -a pleroma -p "$new_user_password"

    echo '0'
}

function install_interactive_pleroma {
    if [ ! $ONION_ONLY ]; then
        ONION_ONLY='no'
    fi

    if [[ $ONION_ONLY != "no" ]]; then
        PLEROMA_DOMAIN_NAME='pleroma.local'
    else
        PLEROMA_DETAILS_COMPLETE=
        while [ ! $PLEROMA_DETAILS_COMPLETE ]
        do
            data=$(tempfile 2>/dev/null)
            trap "rm -f $data" 0 1 2 5 15
            if [[ $DDNS_PROVIDER == "default@freedns.afraid.org" ]]; then
                dialog --backtitle $"Freedombone Configuration" \
                       --title $"Pleroma Configuration" \
                       --form $"\nPlease enter your Pleroma details. The background image URL can be left blank.\n\nIMPORTANT: This should be a domain name which is supported by Let's Encrypt:" 16 65 4 \
                       $"Domain:" 1 1 "$(grep 'PLEROMA_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 25 33 40 \
                       $"Title:" 2 1 "$(grep '$PLEROMA_TITLE' temp.cfg | awk -F '=' '{print $2}')" 2 25 255 255 \
                       $"Background image URL:" 3 1 "$(grep '$PLEROMA_BACKGROUND_IMAGE_URL' temp.cfg | awk -F '=' '{print $2}')" 3 25 255 255 \
                       $"Code:" 4 1 "$(grep 'PLEROMA_CODE' temp.cfg | awk -F '=' '{print $2}')" 4 25 33 255 \
                       2> $data
            else
                dialog --backtitle $"Freedombone Configuration" \
                       --title $"Pleroma Configuration" \
                       --form $"\nPlease enter your Pleroma details. The background image URL can be left blank.\n\nIMPORTANT: This should be a domain name which is supported by Let's Encrypt:" 16 65 4 \
                       $"Domain:" 1 1 "$(grep 'PLEROMA_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 25 33 40 \
                       $"Title:" 2 1 "$(grep '$PLEROMA_TITLE' temp.cfg | awk -F '=' '{print $2}')" 2 25 255 255 \
                       $"Background image URL:" 3 1 "$(grep '$PLEROMA_BACKGROUND_IMAGE_URL' temp.cfg | awk -F '=' '{print $2}')" 3 25 255 255 \
                       2> $data
            fi
            sel=$?
            case $sel in
                1) exit 1;;
                255) exit 1;;
            esac
            PLEROMA_DOMAIN_NAME=$(cat $data | sed -n 1p)
            title=$(cat $data | sed -n 2p)
            if [ ${#title} -gt 1 ]; then
                PLEROMA_TITLE=$welcome_msg
            fi
            img_url=$(cat $data | sed -n 3p)
            if [ ${#img_url} -gt 1 ]; then
                PLEROMA_BACKGROUND_IMAGE_URL=$img_url
            fi
            if [ $PLEROMA_DOMAIN_NAME ]; then
                if [[ $PLEROMA_DOMAIN_NAME == "$HUBZILLA_DOMAIN_NAME" ]]; then
                    PLEROMA_DOMAIN_NAME=""
                fi
                TEST_DOMAIN_NAME=$PLEROMA_DOMAIN_NAME
                validate_domain_name
                if [[ $TEST_DOMAIN_NAME != $PLEROMA_DOMAIN_NAME ]]; then
                    PLEROMA_DOMAIN_NAME=
                    dialog --title $"Domain name validation" --msgbox "$TEST_DOMAIN_NAME" 15 50
                else
                    if [[ $DDNS_PROVIDER == "default@freedns.afraid.org" ]]; then
                        PLEROMA_CODE=$(cat $data | sed -n 4p)
                        validate_freedns_code "$PLEROMA_CODE"
                        if [ ! $VALID_CODE ]; then
                            PLEROMA_DOMAIN_NAME=
                        fi
                    fi
                fi
            fi
            if [ $PLEROMA_DOMAIN_NAME ]; then
                PLEROMA_DETAILS_COMPLETE="yes"
            fi
        done

        # remove any invalid characters
        if [ ${#PLEROMA_TITLE} -gt 0 ]; then
            new_title=$(echo "$PLEROMA_TITLE" | sed "s|'||g")
            PLEROMA_TITLE="$new_title"
        fi

        # save the results in the config file
        write_config_param "PLEROMA_CODE" "$PLEROMA_CODE"
        write_config_param "PLEROMA_TITLE" "$PLEROMA_TITLE"
        write_config_param "PLEROMA_BACKGROUND_IMAGE_URL" "$PLEROMA_BACKGROUND_IMAGE_URL"
    fi
    write_config_param "PLEROMA_DOMAIN_NAME" "$PLEROMA_DOMAIN_NAME"
    APP_INSTALLED=1
}

function change_password_pleroma {
    curr_username="$1"
    new_user_password="$2"

    #${PROJECT_NAME}-pass -u "$curr_username" -a pleroma -p "$new_user_password"
}

function pleroma_create_database_failed {
    run_system_query_postgresql "ALTER USER pleroma NOSUPERUSER;"
    run_system_query_postgresql "ALTER USER pleroma NOCREATEDB;"
}

function pleroma_create_database {
    if [ -f $IMAGE_PASSWORD_FILE ]; then
        PLEROMA_ADMIN_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"
    else
        if [ ! $PLEROMA_ADMIN_PASSWORD ]; then
            PLEROMA_ADMIN_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
        fi
    fi
    if [ ! $PLEROMA_ADMIN_PASSWORD ]; then
        return
    fi

    systemctl restart postgresql
    add_postgresql_user pleroma "$PLEROMA_ADMIN_PASSWORD" encrypted
    run_system_query_postgresql "create database pleroma;"
    # temporarily allow the user to create databases
    run_system_query_postgresql "ALTER USER pleroma CREATEDB;"
    run_system_query_postgresql "ALTER USER pleroma SUPERUSER;"
    run_system_query_postgresql "GRANT ALL ON ALL tables IN SCHEMA public TO pleroma;"
    run_system_query_postgresql "GRANT ALL ON ALL sequences IN SCHEMA public TO pleroma;"
    run_system_query_postgresql "CREATE EXTENSION citext;"
    run_system_query_postgresql "set statement_timeout to 40000;"

    read_config_param "PLEROMA_SECRET_KEY"
    if [ ${#PLEROMA_SECRET_KEY} -lt 64 ]; then
        PLEROMA_SECRET_KEY="$(create_password 30)$(create_password 30)$(create_password 30)"
        if [ ${#PLEROMA_SECRET_KEY} -lt 64 ]; then
            pleroma_create_database_failed
            echo $'Pleroma secret key not created'
            exit 6782352
        fi
        write_config_param "PLEROMA_SECRET_KEY" "$PLEROMA_SECRET_KEY"
    fi

    if [ ! -d $PLEROMA_DIR/config ]; then
        echo $"Missing directory $PLEROMA_DIR/config"
        exit 7835393
    fi
    pleroma_secret=$PLEROMA_DIR/config/dev.secret.exs
    if [ ! -f $PLEROMA_DIR/config/dev.exs ]; then
        echo $"Did not find $PLEROMA_DIR/config/dev.exs"
        exit 78923528
    fi
    cp $PLEROMA_DIR/config/dev.exs $pleroma_secret
    sed -i "s|username:.*|username: \"pleroma\",|g" $pleroma_secret
    sed -i "s|password:.*|password: \"$PLEROMA_ADMIN_PASSWORD\",|g" $pleroma_secret
    sed -i "s|database:.*|database: \"pleroma\",|g" $pleroma_secret
    sed -i "/Pleroma.Web.Endpoint/a secret_key_base: \"$PLEROMA_SECRET_KEY\"," $pleroma_secret
    sed -i 's|secret_key_base: |  secret_key_base: |g' $pleroma_secret
    sed -i "/Pleroma.Web.Endpoint/a pubsub: [name: Pleroma.Web.PubSub, adapter: Phoenix.PubSub.PG2]," $pleroma_secret
    sed -i 's|pubsub: |  pubsub: |g' $pleroma_secret
    sed -i 's|watchers: []|watchers: [],|g' $pleroma_secret
    if [[ $ONION_ONLY == 'no' ]]; then
        sed -i "/watchers: []/a url: [host: \"$PLEROMA_DOMAIN_NAME\", scheme: \"https\", port: 443]" $pleroma_secret
    else
        sed -i "/watchers: []/a url: [host: \"$PLEROMA_ONION_HOSTNAME\", scheme: \"http\", port: 80]" $pleroma_secret
    fi
    sed -i 's|url: |  url: |g' $pleroma_secret
    if ! grep -q "pbkdf2_rounds" $pleroma_secret; then
        sed -i '/config :logger/a config :comeonin, :pbkdf2_rounds, 1' $pleroma_secret
    else
        sed -i 's|pbkdf2_rounds.*|pbkdf2_rounds, 1|g' $pleroma_secret
    fi
    sed -i 's|import_config|# import_config|g' $pleroma_secret

    cd $PLEROMA_DIR
    chown -R pleroma:pleroma $PLEROMA_DIR/*
    sudo -u pleroma mix local.rebar --force
    if [ ! "$?" = "0" ]; then
        pleroma_create_database_failed
        echo $'mix local.rebar failed'
        exit 73528562
    fi
    sudo -u pleroma mix local.hex --force
    sudo -u pleroma mix deps.compile mimerl
    systemctl restart postgresql
    sudo -u pleroma mix ecto.create --force
    if [ ! "$?" = "0" ]; then
        pleroma_create_database_failed
        echo $'mix ecto.create failed'
        exit 83653582
    fi
    sudo -u pleroma mix ecto.migrate --force
    if [ ! "$?" = "0" ]; then
        pleroma_create_database_failed
        echo $'mix ecto.migrate failed'
        exit 73752573
    fi

    # revoke the ability to create databases for this user
    run_system_query_postgresql "ALTER USER pleroma NOSUPERUSER;"
    run_system_query_postgresql "ALTER USER pleroma NOCREATEDB;"
}

function reconfigure_pleroma {
    echo -n ''
}

function pleroma_set_background_image {
    PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Pleroma" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Set a background image URL' 10 60 2>$data
    sel=$?
    case $sel in
        0)
            temp_background=$(<$data)
            if [ ${#temp_background} -gt 0 ]; then
                PLEROMA_BACKGROUND_IMAGE_URL="$temp_background"
                write_config_param "PLEROMA_BACKGROUND_IMAGE_URL" "$PLEROMA_BACKGROUND_IMAGE_URL"
                if [[ $(pleroma_set_background_image_from_url $PLEROMA_DIR "$PLEROMA_DOMAIN_NAME" "$PLEROMA_BACKGROUND_IMAGE_URL" "$PLEROMA_TITLE" | tail -n 1) == "0" ]]; then
                    pleroma_recompile
                    dialog --title $"Set Pleroma login background" \
                           --msgbox $"The background image has been set" 6 60
                fi
            fi
           ;;
    esac
    rm $data
}

function pleroma_set_title {
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Pleroma" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Set a title' 10 60 2>$data
    sel=$?
    case $sel in
        0)
            new_title=$(<$data)
            if [ ${#new_title} -gt 0 ]; then
                PLEROMA_TITLE="$new_title"
                PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
                write_config_param "PLEROMA_TITLE" "$PLEROMA_TITLE"
                sed -i "s|\"name\":.*|\"name\": \"${PLEROMA_TITLE}\",|g" $PLEROMA_DIR/static/config.json
                sed -i "s|\"name\":.*|\"name\": \"${PLEROMA_TITLE}\",|g" $PLEROMA_DIR/priv/static/static/config.json
                sed -i "s|name: .*|name: \"${PLEROMA_TITLE}\",|g" $PLEROMA_DIR/config/config.exs
                systemctl restart pleroma
                dialog --title $"Set Pleroma title" \
                       --msgbox $"The title has been set" 6 60
            fi
           ;;
    esac
    rm $data
}

function pleroma_set_expire_months {
    PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
    read_config_param "PLEROMA_DOMAIN_NAME"
    read_config_param "PLEROMA_EXPIRE_MONTHS"

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Pleroma" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Set an expiry period for posts in months. Anything older will be deleted. Lower values help to keep the database size small and as fast as possible.' 12 60 "$PLEROMA_EXPIRE_MONTHS" 2>$data
    sel=$?
    case $sel in
        0)
            new_expiry_months=$(<$data)
            if [ ${#new_expiry_months} -gt 0 ]; then
                # should contain no spaces
                if [[ "$new_expiry_months" == *" "* ]]; then
                    return
                fi
                # should be a number
                re='^[0-9]+$'
                if ! [[ $new_expiry_months =~ $re ]] ; then
                    return
                fi
                # set the new value
                PLEROMA_EXPIRE_MONTHS=$new_expiry_months
                write_config_param "PLEROMA_EXPIRE_MONTHS" "$PLEROMA_EXPIRE_MONTHS"

                expire_pleroma_posts $PLEROMA_DOMAIN_NAME $PLEROMA_EXPIRE_MONTHS
                create_pleroma_blocklist

                dialog --title $"Set Pleroma post expiry period" \
                       --msgbox $"Expiry period set to $PLEROMA_EXPIRE_MONTHS months" 6 60
            fi
           ;;
    esac
    rm $data
}

function pleroma_disable_registrations {
    dialog --title $"Disable new Pleroma user registrations" \
           --backtitle $"Freedombone Control Panel" \
           --yesno $"\nDo you wish to disable new registrations?" 10 60
    sel=$?
    case $sel in
        0) sed -i 's|registrations_open:.*|registrations_open: false|g' $PLEROMA_DIR/config/config.exs
           sed -i 's|"registrationOpen":.*|"registrationOpen": false|g' $PLEROMA_DIR/priv/static/static/config.json
           ;;
        1) sed -i 's|registrations_open:.*|registrations_open: true|g' $PLEROMA_DIR/config/config.exs
           sed -i 's|"registrationOpen":.*|"registrationOpen": true|g' $PLEROMA_DIR/priv/static/static/config.json
           ;;
        255) return;;
    esac
    pleroma_recompile
}

function pleroma_add_emoji {
    emoji_resolution='128x128'

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Add Custom Emoji" \
           --form "\n" 8 75 2 \
           $"Shortcode:" 1 1 "" 1 18 16 15 \
           $"ImageURL:" 2 1 "" 2 18 512 10000 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    shortcode=$(cat $data | sed -n 1p)
    image_url=$(cat $data | sed -n 2p)
    rm $data
    if [ ${#shortcode} -lt 2 ]; then
        return
    fi
    if [ ${#image_url} -lt 2 ]; then
        return
    fi
    if [[ "$image_url" != *'.'* ]]; then
        return
    fi
    if [[ "$image_url" != *'.png' && "$image_url" != *'.jpg' && "$image_url" != *'.jpeg' && "$image_url" != *'.gif' ]]; then
        dialog --title $"Add Custom Emoji" \
               --msgbox $"The image must be png/jpg/gif format" 6 60
        return
    fi
    if [[ "$shortcode" == *':'* || "$shortcode" == *' '* || "$shortcode" == *'.'* || "$shortcode" == *'!'* ]]; then
        dialog --title $"Add Custom Emoji" \
               --msgbox $"The shortcode contains invalid characters" 6 60
        return
    fi

    image_extension='png'
    if [[ "$image_url" == *'.jpg' || "$image_url" == *'.jpeg' ]]; then
        image_extension='jpg'
    fi
    if [[ "$image_url" == *'.gif' ]]; then
        image_extension='gif'
    fi

    if [ ! -d $PLEROMA_DIR/priv/static/emoji ]; then
        mkdir -p $PLEROMA_DIR/priv/static/emoji
    fi

    image_filename=$PLEROMA_DIR/priv/static/emoji/${shortcode}.${image_extension}
    wget "$image_url" -O $image_filename
    if [ ! -f $image_filename ]; then
        dialog --title $"Add Custom Emoji" \
               --msgbox $"Unable to download the image" 6 60
        return
    fi

    if [[ "$image_url" == *'.jpg' || "$image_url" == *'.jpeg' || "$image_url" == *'.gif' ]]; then
        convert $image_filename -resize $emoji_resolution $PLEROMA_DIR/priv/static/emoji/${shortcode}.png
        if [ ! -f $PLEROMA_DIR/priv/static/emoji/${shortcode}.png ]; then
            dialog --title $"Add Custom Emoji" \
                   --msgbox $"Unable to convert empji image to png format" 6 60
            return
        fi

        # remove the original
        rm $image_filename

        image_extension='png'
        image_filename=$PLEROMA_DIR/priv/static/emoji/${shortcode}.${image_extension}
    else
        convert $image_filename -resize $emoji_resolution $image_filename
    fi

    if ! grep -q "${shortcode}," $PLEROMA_DIR/config/emoji.txt; then
        echo "${shortcode}, /emoji/${shortcode}.${image_extension}" >> $PLEROMA_DIR/config/emoji.txt
    else
        sed -i "s|${shortcode},.*|${shortcode}, /emoji/${shortcode}.${image_extension}|g" $PLEROMA_DIR/config/emoji.txt
    fi

    chown -R pleroma:pleroma $PLEROMA_DIR
    clear
    echo ''
    echo $'Recompiling Pleroma with the new emoji'
    systemctl stop pleroma
    pleroma_recompile

    dialog --title $"Add Custom Emoji" \
           --msgbox $"Custom emoji :${shortcode}: has been added" 6 70
}

function configure_interactive_pleroma {
    read_config_param PLEROMA_DOMAIN_NAME
    read_config_param PLEROMA_EXPIRE_MONTHS
    while true
    do
        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Pleroma" \
               --radiolist $"Choose an operation:" 15 70 6 \
               1 $"Set a background image" off \
               2 $"Set the title" off \
               3 $"Disable new account registrations" off \
               4 $"Add a custom emoji" off \
               5 $"Set post expiry period (currently $PLEROMA_EXPIRE_MONTHS months)" off \
               6 $"Exit" on 2> $data
        sel=$?
        case $sel in
            1) return;;
            255) return;;
        esac
        case $(cat $data) in
            1) pleroma_set_background_image;;
            2) pleroma_set_title;;
            3) pleroma_disable_registrations;;
            4) pleroma_add_emoji;;
            5) pleroma_set_expire_months;;
            6) break;;
        esac
        rm $data
    done
}

function upgrade_pleroma {
    read_config_param PLEROMA_DOMAIN_NAME
    read_config_param PLEROMA_EXPIRE_MONTHS

    if [ ! -f $pleroma_expire_posts_script ]; then
        expire_pleroma_posts $PLEROMA_DOMAIN_NAME $PLEROMA_EXPIRE_MONTHS
    fi
    if [ ! -f $blocking_script_file ]; then
        create_pleroma_blocklist
    fi

    CURR_PLEROMA_COMMIT=$(get_completion_param "pleroma commit")
    if [[ "$CURR_PLEROMA_COMMIT" == "$PLEROMA_COMMIT" ]]; then
        return
    fi

    function_check set_repo_commit
    set_repo_commit $PLEROMA_DIR "pleroma commit" "$PLEROMA_COMMIT" $PLEROMA_REPO
    chown -R pleroma:pleroma $PLEROMA_DIR

    sudo -u pleroma mix deps.get
    pleroma_recompile

    expire_pleroma_posts $PLEROMA_DOMAIN_NAME $PLEROMA_EXPIRE_MONTHS
    create_pleroma_blocklist
}

function backup_local_pleroma {
    PLEROMA_DOMAIN_NAME='pleroma'
    if grep -q "pleroma domain" $COMPLETION_FILE; then
        PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
    fi

    function_check suspend_site
    suspend_site ${PLEROMA_DOMAIN_NAME}

    source_directory=$PLEROMA_DIR
    dest_directory=pleroma
    backup_directory_to_usb $source_directory $dest_directory

    USE_POSTGRESQL=1
    function_check backup_database_to_usb
    backup_database_to_usb pleroma

    function_check restart_site
    restart_site
}

function restore_local_pleroma {
    if ! grep -q "pleroma domain" $COMPLETION_FILE; then
        return
    fi
    PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
    if [ $PLEROMA_DOMAIN_NAME ]; then
        echo $"Restoring pleroma"
        temp_restore_dir=/root/temppleroma
        pleroma_dir=$PLEROMA_DIR

        PLEROMA_ONION_HOSTNAME=$(cat /var/lib/tor/hidden_service_pleroma/hostname)
        function_check pleroma_create_database
        pleroma_create_database

        USE_POSTGRESQL=1
        restore_database pleroma
        if [ -d $temp_restore_dir ]; then
            rm -rf $temp_restore_dir
        fi

        function_check restore_directory_from_usb
        restore_directory_from_usb $temp_restore_dir pleroma
        if [ -d $temp_restore_dir ]; then
            chown -R pleroma:pleroma $pleroma_dir
            rm -rf $temp_restore_dir
        fi

        echo $"Restore of pleroma complete"
    fi
}

function backup_remote_pleroma {
    PLEROMA_DOMAIN_NAME='pleroma'
    if grep -q "pleroma domain" $COMPLETION_FILE; then
        PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
    fi

    function_check suspend_site
    suspend_site ${PLEROMA_DOMAIN_NAME}

    source_directory=$PLEROMA_DIR
    dest_directory=pleroma
    backup_directory_to_friend $source_directory $dest_directory

    USE_POSTGRESQL=1
    function_check backup_database_to_friend
    backup_database_to_friend pleroma

    function_check restart_site
    restart_site
}

function restore_remote_pleroma {
    if ! grep -q "pleroma domain" $COMPLETION_FILE; then
        return
    fi
    PLEROMA_DOMAIN_NAME=$(get_completion_param "pleroma domain")
    if [ $PLEROMA_DOMAIN_NAME ]; then
        echo $"Restoring pleroma"
        temp_restore_dir=/root/temppleroma
        pleroma_dir=$PLEROMA_DIR

        PLEROMA_ONION_HOSTNAME=$(cat /var/lib/tor/hidden_service_pleroma/hostname)
        function_check pleroma_create_database
        pleroma_create_database

        USE_POSTGRESQL=1
        function_check restore_database_from_friend
        restore_database_from_friend pleroma
        if [ -d $temp_restore_dir ]; then
            rm -rf $temp_restore_dir
        fi

        function_check restore_directory_from_friend
        restore_directory_from_friend $temp_restore_dir pleroma
        if [ -d $temp_restore_dir ]; then
            chown -R pleroma:pleroma $pleroma_dir
            rm -rf $temp_restore_dir
        fi

        pleroma_update_after_restore pleroma ${PLEROMA_DOMAIN_NAME}

        echo $"Restore of pleroma complete"
    fi
}

function remove_pleroma {
    if [ ${#PLEROMA_DOMAIN_NAME} -eq 0 ]; then
        return
    fi
    systemctl stop pleroma
    systemctl disable pleroma
    rm /etc/systemd/system/pleroma.service

    userdel pleroma
    #apt-get -yq remove esl-erlang elixir erlang-xmerl erlang-dev erlang-parsetools

    function_check remove_nodejs
    remove_nodejs pleroma-backend

    read_config_param "PLEROMA_DOMAIN_NAME"
    read_config_param "MY_USERNAME"
    echo "Removing $PLEROMA_DOMAIN_NAME"
    nginx_dissite $PLEROMA_DOMAIN_NAME
    remove_certs $PLEROMA_DOMAIN_NAME

    if [ -d /var/www/$PLEROMA_DOMAIN_NAME ]; then
        rm -rf /var/www/$PLEROMA_DOMAIN_NAME
    fi
    if [ -f /etc/nginx/sites-available/$PLEROMA_DOMAIN_NAME ]; then
        rm /etc/nginx/sites-available/$PLEROMA_DOMAIN_NAME
    fi
    if [ -d $PLEROMA_DIR ]; then
        rm -rf $PLEROMA_DIR
    fi
    function_check drop_database_postgresql
    drop_database_postgresql pleroma
    function_check remove_onion_service
    remove_onion_service pleroma ${PLEROMA_ONION_PORT}
    remove_app pleroma
    remove_completion_param install_pleroma
    sed -i '/pleroma domain/d' $COMPLETION_FILE
    sed -i '/pleroma commit/d' $COMPLETION_FILE
    sed -i "/$blocking_script_file/d" /etc/crontab

    function_check remove_ddns_domain
    remove_ddns_domain $PLEROMA_DOMAIN_NAME
}

function install_elixir {
    apt-get -yq install wget build-essential

    if [ ! -d $INSTALL_DIR ]; then
        mkdir -p $INSTALL_DIR
    fi

    cd $INSTALL_DIR
    erlang_package=erlang-solutions_1.0_all.deb
    wget https://packages.erlang-solutions.com/$erlang_package
    if [ ! -f $INSTALL_DIR/$erlang_package ]; then
        exit 72853
    fi
    dpkg -i $erlang_package
    apt-get -yq update
    apt-get -yq install esl-erlang
    apt-get -yq install elixir erlang-xmerl erlang-dev erlang-parsetools

    if [ ! -f /usr/local/bin/mix ]; then
        echo $'/usr/local/bin/mix not found after elixir installation'
        exit 629352
    fi
}

function install_pleroma {
    if [ ! $ONION_ONLY ]; then
        ONION_ONLY='no'
    fi

    apt-get -yq install wget imagemagick

    # We need elixir 1.4+ here, so the debian repo package won't do
    install_elixir

    function_check install_nodejs
    install_nodejs pleroma-backend
    install_postgresql

    if [ ! -d /var/www/${PLEROMA_DOMAIN_NAME}/htdocs ]; then
        mkdir -p /var/www/${PLEROMA_DOMAIN_NAME}/htdocs
    fi
    if [ -d $PLEROMA_DIR ]; then
        rm -rf $PLEROMA_DIR
    fi


    # get the repo
    if [ -f /repos/pleroma/index.html ]; then
        mv /repos/pleroma /repos/pleroma-fe
    fi
    if [ -d /repos/pleroma ]; then
        mkdir -p $PLEROMA_DIR
        cp -r -p /repos/pleroma/. $PLEROMA_DIR
        cd $PLEROMA_DIR
        git pull
    else
        function_check git_clone
        git_clone $PLEROMA_REPO $PLEROMA_DIR
    fi

    if [ ! -d $PLEROMA_DIR ]; then
        echo $'Unable to clone pleroma backend repo'
        exit 783523
    fi


    # create user
    useradd -d $PLEROMA_DIR -s /bin/false pleroma


    # checkout the commit
    cd $PLEROMA_DIR
    git checkout $PLEROMA_COMMIT -b $PLEROMA_COMMIT
    set_completion_param "pleroma commit" "$PLEROMA_COMMIT"
    chown -R pleroma:pleroma $PLEROMA_DIR


    # web config
    function_check add_ddns_domain
    add_ddns_domain $PLEROMA_DOMAIN_NAME

    PLEROMA_ONION_HOSTNAME=$(add_onion_service pleroma 80 ${PLEROMA_ONION_PORT})

    pleroma_nginx_site=/etc/nginx/sites-available/$PLEROMA_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect $PLEROMA_DOMAIN_NAME "index index.html"
        echo '' >> $pleroma_nginx_site
        echo 'proxy_cache_path /tmp/pleroma-media-cache levels=1:2 keys_zone=pleroma_media_cache:10m max_size=100m inactive=80m use_temp_path=off;' >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        echo 'server {' >> $pleroma_nginx_site
        echo '  listen 443 ssl;' >> $pleroma_nginx_site
        echo '  listen [::]:443 ssl;' >> $pleroma_nginx_site
        echo "  server_name $PLEROMA_DOMAIN_NAME;" >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        function_check nginx_compress
        nginx_compress $PLEROMA_DOMAIN_NAME
        echo '' >> $pleroma_nginx_site
        echo '  # Security' >> $pleroma_nginx_site
        function_check nginx_ssl
        nginx_ssl $PLEROMA_DOMAIN_NAME

        function_check nginx_disable_sniffing
        nginx_disable_sniffing $PLEROMA_DOMAIN_NAME

        echo '  add_header Strict-Transport-Security max-age=15768000;' >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        echo '  # Logs' >> $pleroma_nginx_site
        echo '  access_log /dev/null;' >> $pleroma_nginx_site
        echo '  error_log /dev/null;' >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        echo "  root $PLEROMA_DIR;" >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        echo '  index index.html;' >> $pleroma_nginx_site
        echo '  location / {' >> $pleroma_nginx_site
        function_check nginx_limits
        nginx_limits $PLEROMA_DOMAIN_NAME '15m'
        echo '    proxy_http_version 1.1;' >> $pleroma_nginx_site
        echo '    proxy_set_header Upgrade $http_upgrade;' >> $pleroma_nginx_site
        echo '    proxy_set_header Connection "upgrade";' >> $pleroma_nginx_site
        echo "    proxy_pass http://localhost:$PLEROMA_PORT;" >> $pleroma_nginx_site
        echo '  }' >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
        echo '  location /proxy {' >> $pleroma_nginx_site
        nginx_limits $PLEROMA_DOMAIN_NAME '15m'
        echo '    proxy_cache pleroma_media_cache;' >> $pleroma_nginx_site
        echo '    proxy_cache_lock on;' >> $pleroma_nginx_site
        echo "    proxy_pass http://localhost:$PLEROMA_PORT;" >> $pleroma_nginx_site
        echo '  }' >> $pleroma_nginx_site
        echo '  # include snippets/well-known.conf;' >> $pleroma_nginx_site
        echo '}' >> $pleroma_nginx_site
    else
        echo 'proxy_cache_path /tmp/pleroma-media-cache levels=1:2 keys_zone=pleroma_media_cache:10m max_size=100m inactive=80m use_temp_path=off;' >> $pleroma_nginx_site
        echo '' >> $pleroma_nginx_site
    fi
    echo 'server {' >> $pleroma_nginx_site
    echo "    listen 127.0.0.1:$PLEROMA_ONION_PORT default_server;" >> $pleroma_nginx_site
    echo "    server_name $PLEROMA_ONION_HOSTNAME;" >> $pleroma_nginx_site
    echo '' >> $pleroma_nginx_site
    function_check nginx_compress
    nginx_compress $PLEROMA_DOMAIN_NAME
    echo '' >> $pleroma_nginx_site
    function_check nginx_disable_sniffing
    nginx_disable_sniffing $PLEROMA_DOMAIN_NAME
    echo '' >> $pleroma_nginx_site
    echo '  # Logs' >> $pleroma_nginx_site
    echo '  access_log /dev/null;' >> $pleroma_nginx_site
    echo '  error_log /dev/null;' >> $pleroma_nginx_site
    echo '' >> $pleroma_nginx_site
    echo "  root $PLEROMA_DIR;" >> $pleroma_nginx_site
    echo '' >> $pleroma_nginx_site
    echo '  index index.html;' >> $pleroma_nginx_site
    echo '  location / {' >> $pleroma_nginx_site
    function_check nginx_limits
    nginx_limits $PLEROMA_DOMAIN_NAME '15m'
    echo '      proxy_http_version 1.1;' >> $pleroma_nginx_site
    echo '      proxy_set_header Upgrade $http_upgrade;' >> $pleroma_nginx_site
    echo '      proxy_set_header Connection "upgrade";' >> $pleroma_nginx_site
    echo "      proxy_pass http://localhost:$PLEROMA_PORT;" >> $pleroma_nginx_site
    echo '  }' >> $pleroma_nginx_site
    echo '' >> $pleroma_nginx_site
    echo '  location /proxy {' >> $pleroma_nginx_site
    nginx_limits $PLEROMA_DOMAIN_NAME '15m'
    echo '    proxy_cache pleroma_media_cache;' >> $pleroma_nginx_site
    echo '    proxy_cache_lock on;' >> $pleroma_nginx_site
    echo "    proxy_pass http://localhost:$PLEROMA_PORT;" >> $pleroma_nginx_site
    echo '  }' >> $pleroma_nginx_site
    echo '  # include snippets/well-known.conf;' >> $pleroma_nginx_site
    echo '}' >> $pleroma_nginx_site


    # back end
    cd $PLEROMA_DIR
    chown -R pleroma:pleroma *
    sudo -u pleroma mix local.hex --force
    if [ ! "$?" = "0" ]; then
        echo $'mix local.hex failed'
        exit 1745673
    fi
    sudo -u pleroma mix deps.get --force
    if [ ! "$?" = "0" ]; then
        echo $'mix deps.get failed'
        exit 7325733
    fi

    function_check pleroma_create_database
    pleroma_create_database

    ${PROJECT_NAME}-pass -u $MY_USERNAME -a pleroma -p "$PLEROMA_ADMIN_PASSWORD"

    # NOTE: we don't need to install the frontend separately,
    # since the backend contains a precompiled version of it

    install_gnusocial_default_background "pleroma" "$PLEROMA_DOMAIN_NAME"
    if [ ! -f $PLEROMA_DIR/priv/static/static/config.json ]; then
        echo $"$PLEROMA_DIR/priv/static/static/config.json file missing"
        exit 323689
    fi
    sed -i 's|"theme":.*|"theme": "base16-summerfruit-dark.css",|g' $PLEROMA_DIR/priv/static/static/config.json

    if [ $PLEROMA_BACKGROUND_IMAGE_URL ]; then
        pleroma_set_background_image_from_url $PLEROMA_DIR/priv/static "$PLEROMA_DOMAIN_NAME" "$PLEROMA_BACKGROUND_IMAGE_URL" "$PLEROMA_TITLE"
    fi


    # Get certificate
    function_check create_site_certificate
    create_site_certificate $PLEROMA_DOMAIN_NAME 'yes'

    function_check nginx_ensite
    nginx_ensite $PLEROMA_DOMAIN_NAME

    systemctl restart postgresql
    systemctl restart nginx

    set_completion_param "pleroma domain" "$PLEROMA_DOMAIN_NAME"

    # We need to set up the url option again because it somehow gets
    # lost during mix compile
    pleroma_secret=$PLEROMA_DIR/config/dev.secret.exs
    if ! grep -q 'watchers: [],' $pleroma_secret; then
        sed -i 's|watchers: \[\]|watchers: \[\],|g' $pleroma_secret
    fi
    if ! grep -q 'url:' $pleroma_secret; then
        if [[ $ONION_ONLY == 'no' ]]; then
            sed -i "/watchers: /a url: [host: \"$PLEROMA_DOMAIN_NAME\", scheme: \"https\", port: 443]" $pleroma_secret
        else
            sed -i "/watchers: /a url: [host: \"$PLEROMA_ONION_HOSTNAME\", scheme: \"http\", port: 80]" $pleroma_secret
        fi
    fi

    create_pleroma_blocklist

    # daemon
    echo '[Unit]' > /etc/systemd/system/pleroma.service
    echo 'Description=Pleroma social network' >> /etc/systemd/system/pleroma.service
    echo 'After=network.target postgresql.service' >> /etc/systemd/system/pleroma.service
    echo '' >> /etc/systemd/system/pleroma.service
    echo '[Service]' >> /etc/systemd/system/pleroma.service
    echo 'User=pleroma' >> /etc/systemd/system/pleroma.service
    echo "WorkingDirectory=$PLEROMA_DIR" >> /etc/systemd/system/pleroma.service
    echo "Environment=\"HOME=$PLEROMA_DIR\"" >> /etc/systemd/system/pleroma.service
    echo 'ExecStart=/usr/local/bin/mix phx.server' >> /etc/systemd/system/pleroma.service
    echo 'ExecReload=/bin/kill $MAINPID' >> /etc/systemd/system/pleroma.service
    echo 'KillMode=process' >> /etc/systemd/system/pleroma.service
    echo 'Restart=on-failure' >> /etc/systemd/system/pleroma.service
    echo '' >> /etc/systemd/system/pleroma.service
    echo '[Install]' >> /etc/systemd/system/pleroma.service
    echo 'WantedBy=multi-user.target' >> /etc/systemd/system/pleroma.service
    echo 'Alias=pleroma.service' >> /etc/systemd/system/pleroma.service
    systemctl daemon-reload
    systemctl enable pleroma
    systemctl start pleroma

    APP_INSTALLED=1
}

# NOTE: deliberately there is no "exit 0"