#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# GNU Social application
#
# License
# =======
#
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
#
# 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 media'

MICROBLOG_DOMAIN_NAME=
MICROBLOG_CODE=
MICROBLOG_ONION_PORT=8087
MICROBLOG_REPO="https://git.gnu.io/gnu/gnu-social.git"
MICROBLOG_COMMIT='c67b89e56bf0f90730a9e22beca7e1bd41fc26c3'
MICROBLOG_ADMIN_PASSWORD=
MICROBLOG_THEME_REPO="https://git.gnu.io/h2p/Qvitter.git"
MICROBLOG_THEME_COMMIT='34510bcf37c727f91afad789fb0a531a45171ccf'
MICROBLOG_WELCOME_MESSAGE=$'<h1>Welcome to GNU Social – a federated microblog</h1><p>Another Freedombone site</p>'
MICROBLOG_BACKGROUND_IMAGE_URL=
MICROBLOG_MARKDOWN_REPO="https://git.gnu.io/chimo/markdown.git"
MICROBLOG_MARKDOWN_COMMIT='03c53942f94b3376f0946e6e1fe566cc21ccf232'

# Sharings plugin for the microblog
SHARINGS_REPO="http://git.lasindias.club/bashrc/Sharings"
SHARINGS_COMMIT='d5c6c7f855d9afff9086c09ea706f38c859bc0d4'
SHARINGS_THEME_REPO="http://git.lasindias.club/manuel/SharingsTheme"
SHARINGS_THEME_COMMIT='7106c7ef03'

# NSFW plugin
GNUSOCIAL_NSFW_REPO="https://gitgud.io/ShitposterClub/SensitiveContent"
GNUSOCIAL_NSFW_COMMIT='a096bbe0cfae9a9b177682920ffb58d32a48e136'

function change_password_gnusocial {
    echo -n ''
}

function get_mariadb_gnusocial_admin_password {
    if [ -f /home/$MY_USERNAME/README ]; then
        if grep -q "MariaDB gnusocial admin password" /home/$MY_USERNAME/README; then
            MICROBLOG_ADMIN_PASSWORD=$(cat /home/$MY_USERNAME/README | grep "MariaDB gnusocial admin password" | awk -F ':' '{print $2}' | sed 's/^ *//')
        fi
        if grep -q "Microblog administrator password" /home/$MY_USERNAME/README; then
            MICROBLOG_ADMIN_PASSWORD=$(cat /home/$MY_USERNAME/README | grep "Microblog administrator password" | awk -F ':' '{print $2}' | sed 's/^ *//')
        fi
    fi
}

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

    function_check create_database
    create_database gnusocial "$MICROBLOG_ADMIN_PASSWORD" $MY_USERNAME
}

function gnusocial_running_script {
    if ! grep -Fxq "install_gnusocial" $COMPLETION_FILE; then
        return
    fi

    # check that the daemon is running
    echo '#!/bin/bash' > /etc/cron.hourly/gnusocial-daemons
    echo 'daemon_lines=$(ps aux | grep "scripts/queuedaemon.php" | grep "/var/www")' >> /etc/cron.hourly/gnusocial-daemons
    echo 'if [[ $daemon_lines != *"/var/www/"* ]]; then' >> /etc/cron.hourly/gnusocial-daemons

    echo "    ADMIN_USER=\$(cat $COMPLETION_FILE | grep 'Admin user' | awk -F ':' '{print \$2}')" >> /etc/cron.hourly/gnusocial-daemons
    echo '    MY_EMAIL_ADDRESS=$ADMIN_USER@$HOSTNAME' >> /etc/cron.hourly/gnusocial-daemons
    echo '    echo "Restarting GNU Social daemons" | mail -s "GNU Social daemons not found" $MY_EMAIL_ADDRESS' >> /etc/cron.hourly/gnusocial-daemons
    echo "    cd /var/www/${MICROBLOG_DOMAIN_NAME}/htdocs" >> /etc/cron.hourly/gnusocial-daemons
    echo '    scripts/startdaemons.sh' >> /etc/cron.hourly/gnusocial-daemons
    echo 'fi' >> /etc/cron.hourly/gnusocial-daemons
    chmod +x /etc/cron.hourly/gnusocial-daemons
}

function reconfigure_gnusocial {
    echo -n ''
}

function upgrade_gnusocial {
    if ! grep -Fxq "install_gnusocial_main" $COMPLETION_FILE; then
        return
    fi

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$MICROBLOG_DOMAIN_NAME/htdocs "GNU Social commit" "$MICROBLOG_COMMIT" $MICROBLOG_REPO

    function_check gnusocial_running_script
    gnusocial_running_script
}


function backup_local_gnusocial {
    MICROBLOG_DOMAIN_NAME='microblog'
    if grep -q "GNU Social domain" $COMPLETION_FILE; then
        MICROBLOG_DOMAIN_NAME=$(cat $COMPLETION_FILE | grep "GNU Social domain" | awk -F ':' '{print $2}')
    fi

    source_directory=/var/www/${MICROBLOG_DOMAIN_NAME}/htdocs
    if [ -d $source_directory ]; then
        dest_directory=gnusocial
        echo $"Backing up $source_directory to $dest_directory"

        function_check suspend_site
        suspend_site ${MICROBLOG_DOMAIN_NAME}

        function_check backup_directory_to_usb
        backup_directory_to_usb $source_directory $dest_directory

        function_check backup_database_to_usb
        backup_database_to_usb gnusocial

        function_check restart_site
        restart_site

        echo $"Backup to $dest_directory complete"
    fi
}

function restore_local_gnusocial {
    if ! grep -q "GNU Social domain" $COMPLETION_FILE; then
        return
    fi
    MICROBLOG_DOMAIN_NAME=$(cat $COMPLETION_FILE | grep "GNU Social domain" | awk -F ':' '{print $2}')
    if [ $MICROBLOG_DOMAIN_NAME ]; then
        echo $"Restoring GNU Social"
        temp_restore_dir=/root/tempgnusocial
        gnusocial_dir=/var/www/${MICROBLOG_DOMAIN_NAME}/htdocs
        # stop the daemons
        cd $gnusocial_dir
        scripts/stopdaemons.sh

        function_check gnusocial_create_database
        gnusocial_create_database

        restore_database gnusocial ${MICROBLOG_DOMAIN_NAME}
        if [ -d $temp_restore_dir ]; then
            rm -rf $temp_restore_dir
        fi

        # start the daemons
        cd $gnusocial_dir
        scripts/startdaemons.sh
        echo $"Restore of GNU Social complete"
    fi
}

function backup_remote_gnusocial {
    if grep -q "GNU Social domain" $COMPLETION_FILE; then
        MICROBLOG_DOMAIN_NAME=$(cat $COMPLETION_FILE | grep "GNU Social domain" | awk -F ':' '{print $2}')
        temp_backup_dir=/var/www/${MICROBLOG_DOMAIN_NAME}/htdocs
        if [ -d $temp_backup_dir ]; then
            function_check suspend_site
            suspend_site ${MICROBLOG_DOMAIN_NAME}

            function_check backup_database_to_friend
            backup_database_to_friend gnusocial

            echo $"Backing up GNU social installation"

            function_check backup_directory_to_friend
            backup_directory_to_friend $temp_backup_dir gnusocial

            function_check restart_site
            restart_site
        else
            echo $"GNU Social domain specified but not found in ${temp_backup_dir}"
        fi
    fi
}

function restore_remote_gnusocial {
    if grep -q "GNU Social domain" $COMPLETION_FILE; then
        echo $"Restoring GNU Social"
        MICROBLOG_DOMAIN_NAME=$(cat $COMPLETION_FILE | grep "GNU Social domain" | awk -F ':' '{print $2}')

        # stop the daemons
        cd /var/www/${MICROBLOG_DOMAIN_NAME}/htdocs
        scripts/stopdaemons.sh

        function_check gnusocial_create_database
        gnusocial_create_database

        function_check restore_database_from_friend
        restore_database_from_friend gnusocial ${MICROBLOG_DOMAIN_NAME}
        if [ -d /root/tempgnusocial ]; then
            rm -rf /root/tempgnusocial
        fi

        # start the daemons
        cd /var/www/${MICROBLOG_DOMAIN_NAME}/htdocs
        scripts/startdaemons.sh
        echo $"Restore of GNU Social complete"
    fi
}

function remove_gnusocial {
    if ! grep -Fxq "install_gnusocial" $COMPLETION_FILE; then
        return
    fi
    nginx_dissite $MICROBLOG_DOMAIN_NAME
    if [ -d /var/www/$MICROBLOG_DOMAIN_NAME ]; then
        rm -rf /var/www/$MICROBLOG_DOMAIN_NAME
    fi
    if [ -f /etc/nginx/sites-available/$MICROBLOG_DOMAIN_NAME ]; then
        rm /etc/nginx/sites-available/$MICROBLOG_DOMAIN_NAME
    fi
    function_check drop_database
    drop_database gnusocial
    function_check remove_onion_service
    remove_onion_service microblog ${MICROBLOG_ONION_PORT}
    sed -i '/install_gnusocial/d' $COMPLETION_FILE
    sed -i '/GNU Social /d' $COMPLETION_FILE
}

function install_gnusocial_main {
    if [ ! $MICROBLOG_DOMAIN_NAME ]; then
        echo $'No domain name was given for the microblog'
        exit 7359
    fi

    if grep -Fxq "install_gnusocial_main" $COMPLETION_FILE; then
        return
    fi

    function_check gnusocial_running_script
    gnusocial_running_script

    function_check install_mariadb
    install_mariadb

    function_check get_mariadb_password
    get_mariadb_password

    function_check repair_databases_script
    repair_databases_script

    apt-get -y install php-gettext php5-curl php5-gd php5-mysql git curl php-xml-parser
    apt-get -y install php5-memcached php5-intl

    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME ]; then
        mkdir /var/www/$MICROBLOG_DOMAIN_NAME
    fi
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs ]; then
        function_check git_clone
        git_clone $MICROBLOG_REPO /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
        if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs ]; then
            echo $'Unable to clone gnusocial repo'
            exit 87525
        fi
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    git checkout $MICROBLOG_COMMIT -b $MICROBLOG_COMMIT
    if ! grep -q "GNU Social commit" $COMPLETION_FILE; then
        echo "GNU Social commit:$MICROBLOG_COMMIT" >> $COMPLETION_FILE
    else
        sed -i "s/GNU Social commit.*/GNU Social commit:$MICROBLOG_COMMIT/g" $COMPLETION_FILE
    fi

    chmod a+w /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    chown www-data:www-data /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    chmod +x /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/scripts/maildaemon.php

    function_check gnusocial_create_database
    gnusocial_create_database

    if [ ! -f "/etc/aliases" ]; then
        touch /etc/aliases
    fi
    if ! grep -q "www-data: root" /etc/aliases; then
        echo 'www-data: root' >> /etc/aliases
    fi
    if ! grep -q "/var/www/$MICROBLOG_DOMAIN_NAME/htdocs/scripts/maildaemon.php" /etc/aliases; then
        echo "*: /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/scripts/maildaemon.php" >> /etc/aliases
    fi

    function_check add_ddns_domain
    add_ddns_domain $MICROBLOG_DOMAIN_NAME

    microblog_nginx_site=/etc/nginx/sites-available/$MICROBLOG_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect $MICROBLOG_DOMAIN_NAME
        echo 'server {' >> $microblog_nginx_site
        echo '  listen 443 ssl;' >> $microblog_nginx_site
        echo "  server_name $MICROBLOG_DOMAIN_NAME;" >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Security' >> $microblog_nginx_site
        function_check nginx_ssl
        nginx_ssl $MICROBLOG_DOMAIN_NAME

        function_check nginx_disable_sniffing
        nginx_disable_sniffing $MICROBLOG_DOMAIN_NAME

        function_check nginx_limits
        nginx_limits $MICROBLOG_DOMAIN_NAME '15m'
        echo '  add_header Strict-Transport-Security max-age=15768000;' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Logs' >> $microblog_nginx_site
        echo '  access_log off;' >> $microblog_nginx_site
        echo '  error_log off;' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Root' >> $microblog_nginx_site
        echo "  root /var/www/$MICROBLOG_DOMAIN_NAME/htdocs;" >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Index' >> $microblog_nginx_site
        echo '  index index.php;' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # PHP' >> $microblog_nginx_site
        echo '  location ~ \.php {' >> $microblog_nginx_site
        echo '    include snippets/fastcgi-php.conf;' >> $microblog_nginx_site
        echo '    fastcgi_pass unix:/var/run/php5-fpm.sock;' >> $microblog_nginx_site
        echo '  }' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Location' >> $microblog_nginx_site
        echo '  location / {' >> $microblog_nginx_site
        echo '    try_files $uri $uri/ @gnusocial;' >> $microblog_nginx_site
        echo '  }' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Fancy URLs' >> $microblog_nginx_site
        echo '  location @gnusocial {' >> $microblog_nginx_site
        echo '    rewrite ^(.*)$ /index.php?p=$1 last;' >> $microblog_nginx_site
        echo '  }' >> $microblog_nginx_site
        echo '' >> $microblog_nginx_site
        echo '  # Restrict access that is unnecessary anyway' >> $microblog_nginx_site
        echo '  location ~ /\.(ht|git) {' >> $microblog_nginx_site
        echo '    deny all;' >> $microblog_nginx_site
        echo '  }' >> $microblog_nginx_site
        echo '}' >> $microblog_nginx_site
    else
        echo -n '' > $microblog_nginx_site
    fi
    echo 'server {' >> $microblog_nginx_site
    echo "    listen 127.0.0.1:$MICROBLOG_ONION_PORT default_server;" >> $microblog_nginx_site
    echo "    server_name $MICROBLOG_DOMAIN_NAME;" >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    function_check nginx_disable_sniffing
    nginx_disable_sniffing $MICROBLOG_DOMAIN_NAME
    function_check nginx_limits
    nginx_limits $MICROBLOG_DOMAIN_NAME '15m'
    echo '' >> $microblog_nginx_site
    echo '  # Logs' >> $microblog_nginx_site
    echo '  access_log off;' >> $microblog_nginx_site
    echo '  error_log off;' >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # Root' >> $microblog_nginx_site
    echo "  root /var/www/$MICROBLOG_DOMAIN_NAME/htdocs;" >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # Index' >> $microblog_nginx_site
    echo '  index index.php;' >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # PHP' >> $microblog_nginx_site
    echo '  location ~ \.php {' >> $microblog_nginx_site
    echo '    include snippets/fastcgi-php.conf;' >> $microblog_nginx_site
    echo '    fastcgi_pass unix:/var/run/php5-fpm.sock;' >> $microblog_nginx_site
    echo '  }' >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # Location' >> $microblog_nginx_site
    echo '  location / {' >> $microblog_nginx_site
    echo '    try_files $uri $uri/ @gnusocial;' >> $microblog_nginx_site
    echo '  }' >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # Fancy URLs' >> $microblog_nginx_site
    echo '  location @gnusocial {' >> $microblog_nginx_site
    echo '    rewrite ^(.*)$ /index.php?p=$1 last;' >> $microblog_nginx_site
    echo '  }' >> $microblog_nginx_site
    echo '' >> $microblog_nginx_site
    echo '  # Restrict access that is unnecessary anyway' >> $microblog_nginx_site
    echo '  location ~ /\.(ht|git) {' >> $microblog_nginx_site
    echo '    deny all;' >> $microblog_nginx_site
    echo '  }' >> $microblog_nginx_site
    echo '}' >> $microblog_nginx_site

    function_check configure_php
    configure_php

    function_check create_site_certificate
    create_site_certificate $MICROBLOG_DOMAIN_NAME 'yes'

    # Ensure that the database gets backed up locally, if remote
    # backups are not being used
    function_check backup_databases_script_header
    backup_databases_script_header

    function_check backup_database_local
    backup_database_local gnusocial

    function_check nginx_ensite
    nginx_ensite $MICROBLOG_DOMAIN_NAME

    # NOTE: For the typical case always enable SSL and only
    # disable it if in onion only mode. This is due to complexities
    # with the way URLs are generated by GNU Social
    gnusocial_ssl='always'
    if [[ $ONION_ONLY != 'no' ]]; then
        gnusocial_ssl='never'
    fi

    MICROBLOG_ONION_HOSTNAME=$(add_onion_service microblog 80 ${MICROBLOG_ONION_PORT})

    MICROBLOG_SERVER=${MICROBLOG_DOMAIN_NAME}
    if [[ $ONION_ONLY != 'no' ]]; then
        MICROBLOG_SERVER=${MICROBLOG_ONION_HOSTNAME}
    fi

    # Create the configuration
    gnusocial_installer=/var/www/${MICROBLOG_DOMAIN_NAME}/htdocs/scripts/install_cli.php
    if [ ! -f $gnusocial_installer ]; then
        echo $'No GNU Social commandline installer found'
        exit 53026
    fi
    ${gnusocial_installer} --server "${MICROBLOG_SERVER}" \
                           --host="localhost" --database="gnusocial" \
                           --dbtype=mysql --username="root" -v \
                           --password="$MARIADB_PASSWORD" \
                           --sitename=$"GNU Social" --fancy='yes' \
                           --admin-nick="$MY_USERNAME" \
                           --admin-pass="$MICROBLOG_ADMIN_PASSWORD" \
                           --site-profile="community" \
                           --ssl=${gnusocial_ssl}
    # There can be a lot of warnings here so the return value check is disabled
    #if [ ! "$?" = "0" ]; then
    #    # failed to install
    #    echo $'Could not install GNU Social'
    #    exit 72357
    #fi

    # check microblog has a config file
    microblog_config_file=/var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
    if [ ! -f $microblog_config_file ]; then
        echo $'Microblog config.php not found'
        exit 87586
    fi

    # Some useful settings
    if ! grep -q "Recommended GNU social settings" $microblog_config_file; then
        echo "" >> $microblog_config_file
        echo "// Recommended GNU social settings" >> $microblog_config_file
        echo "\$config['thumbnail']['maxsize'] = 3000;" >> $microblog_config_file
        echo "\$config['profile']['delete'] = true;" >> $microblog_config_file
        echo "\$config['profile']['changenick'] = true;" >> $microblog_config_file
        echo "\$config['public']['localonly'] = false;" >> $microblog_config_file
        echo "addPlugin('StoreRemoteMedia');" >> $microblog_config_file
        echo "\$config['queue']['enabled'] = true;" >> $microblog_config_file
        echo "\$config['queue']['daemon'] = true;" >> $microblog_config_file
        echo "\$config['ostatus']['hub_retries'] = 3;" >> $microblog_config_file
    fi

    # This improves performance
    sed -i "s|//\$config\['db'\]\['schemacheck'\].*|\$config\['db'\]\['schemacheck'\] = 'script';|g" $microblog_config_file

    systemctl restart php5-fpm
    systemctl restart nginx

    ${PROJECT_NAME}-addemail -u $MY_USERNAME -e "noreply@$MICROBLOG_DOMAIN_NAME" -g gnusocial --public no

    # some post-install instructions for the user
    if ! grep -q $"Microblog administrator" /home/$MY_USERNAME/README; then
        echo '' >> /home/$MY_USERNAME/README
        echo '' >> /home/$MY_USERNAME/README
        echo $'Microblog' >> /home/$MY_USERNAME/README
        echo '=========' >> /home/$MY_USERNAME/README
        echo $"Microblog administrator nickname: $MY_USERNAME" >> /home/$MY_USERNAME/README
        echo $"Microblog administrator password: $MICROBLOG_ADMIN_PASSWORD" >> /home/$MY_USERNAME/README
        chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
        chmod 600 /home/$MY_USERNAME/README
    fi

    if ! grep -q "Microblog onion domain" /home/$MY_USERNAME/README; then
        echo $"Microblog onion domain: ${MICROBLOG_ONION_HOSTNAME}" >> /home/$MY_USERNAME/README
        echo '' >> /home/$MY_USERNAME/README
        chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
        chmod 600 /home/$MY_USERNAME/README
    fi
    echo "GNU Social onion domain:${MICROBLOG_ONION_HOSTNAME}" >> $COMPLETION_FILE

    echo "GNU Social domain:$MICROBLOG_DOMAIN_NAME" >> $COMPLETION_FILE
    echo 'install_gnusocial_main' >> $COMPLETION_FILE
}

function install_gnusocial_plugin_sharings {
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins ]; then
        echo $'No local/plugins directory found for the microblog'
        exit 72945
    fi

    apt-get -y install liblocale-msgfmt-perl

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins "GNU Social sharings plugin commit" "$SHARINGS_COMMIT" $SHARINGS_REPO

    if grep -Fxq "install_gnusocial_plugin_sharings" $COMPLETION_FILE; then
        return
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins
    function_check git_clone
    git_clone $SHARINGS_REPO Sharings
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings ]; then
        echo $'Unable to clone microblog sharings plugin'
        exit 36738
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings
    git stash
    git checkout master
    git branch -D $SHARINGS_COMMIT
    git checkout $SHARINGS_COMMIT -b $SHARINGS_COMMIT

    # enable the plugin
    if ! grep -q "addPlugin('Sharings');" /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php; then
        echo "addPlugin('Sharings');" >> /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    php scripts/checkschema.php
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings
    php scripts/seedsharings.php
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    php scripts/checkschema.php

    # Languages
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings/locale/en/LC_MESSAGES
    msgfmt -o Sharings.mo Sharings.po
    if [ ! -f Sharings.po ]; then
        echo $'English translations for GNU Social sharings plugin were not created'
        exit 84352
    fi
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings/locale/en_GB/LC_MESSAGES
    msgfmt -o Sharings.mo Sharings.po
    if [ ! -f Sharings.po ]; then
        echo $'English (GB) translations for GNU Social sharings plugin were not created'
        exit 84352
    fi
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Sharings/locale/en_US/LC_MESSAGES
    msgfmt -o Sharings.mo Sharings.po
    if [ ! -f Sharings.po ]; then
        echo $'English (US) translations for GNU Social sharings plugin were not created'
        exit 84352
    fi

    chown -R www-data:www-data /var/www/$MICROBLOG_DOMAIN_NAME/htdocs

    if ! grep -q "GNU Social sharings plugin commit" $COMPLETION_FILE; then
        echo "GNU Social sharings plugin commit:$SHARINGS_COMMIT" >> $COMPLETION_FILE
    else
        sed -i "s|GNU Social sharings plugin commit.*|GNU Social sharings plugin commit:$SHARINGS_COMMIT|g" $COMPLETION_FILE
    fi
    echo 'install_gnusocial_plugin_sharings' >> $COMPLETION_FILE
}

function install_gnusocial_plugin_sharings_theme {
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins ]; then
        echo $'No local/plugins directory found for the microblog'
        exit 74458
    fi

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins "GNU Social sharings theme plugin commit" "$SHARINGS_THEME_COMMIT" $SHARINGS_THEME_REPO

    if grep -Fxq "install_gnusocial_plugin_sharings_theme" $COMPLETION_FILE; then
        return
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins
    function_check git_clone
    git_clone $SHARINGS_THEME_REPO SharingsTheme
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/SharingsTheme ]; then
        echo $'Unable to clone microblog sharings plugin theme'
        exit 639253
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/SharingsTheme
    git stash
    git checkout master
    git branch -D $SHARINGS_THEME_COMMIT
    git checkout $SHARINGS_THEME_COMMIT -b $SHARINGS_THEME_COMMIT

    # enable the plugin
    if ! grep -q "addPlugin('SharingsTheme');" /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php; then
        echo "addPlugin('SharingsTheme');" >> /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    php scripts/checkschema.php

    chown -R www-data:www-data /var/www/$MICROBLOG_DOMAIN_NAME/htdocs

    if ! grep -q "GNU Social sharings plugin theme commit" $COMPLETION_FILE; then
        echo "GNU Social sharings plugin theme commit:$SHARINGS_THEME_COMMIT" >> $COMPLETION_FILE
    else
        sed -i "s|GNU Social sharings plugin theme commit.*|GNU Social sharings plugin theme commit:$SHARINGS_THEME_COMMIT|g" $COMPLETION_FILE
    fi
    echo 'install_gnusocial_plugin_sharings_theme' >> $COMPLETION_FILE
}

function expire_gnusocial_posts {
    # To prevent the database size from growing endlessly this script expires posts
    # after a number of months
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs ]; then
        return
    fi

    gnusocial_expire_script=/usr/bin/gnusocial-expire

    echo '<?php' > $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo '// GNU Social post expiry script, based on StatExpire by Tony Baldwin' >> $gnusocial_expire_script
    echo '// https://github.com/tonybaldwin/statexpire' >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo '$oldate=date(("Y-m-d"), strtotime("-3 months"));' >> $gnusocial_expire_script
    echo '$username="root";' >> $gnusocial_expire_script
    echo "\$password=trim(file_get_contents(\"$DATABASE_PASSWORD_FILE\"));" >> $gnusocial_expire_script
    echo '$database="gnusocial";' >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo 'if (!$link = mysql_connect("localhost", $username, $password)) {' >> $gnusocial_expire_script
    echo '    echo "Could not connect to mariadb";' >> $gnusocial_expire_script
    echo '    exit;' >> $gnusocial_expire_script
    echo '}' >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo 'if (!mysql_select_db($database, $link)) {' >> $gnusocial_expire_script
    echo '    echo "Could not select gnusocial database";' >> $gnusocial_expire_script
    echo '    exit;' >> $gnusocial_expire_script
    echo '}' >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo "\$notice_query=\"DELETE FROM notice WHERE created <= '\$oldate 01:01:01'\";" >> $gnusocial_expire_script
    echo "\$conversation_query=\"DELETE FROM conversation WHERE created <= '$oldate 01:01:01'\";" >> $gnusocial_expire_script
    echo "\$reply_query=\"DELETE FROM reply WHERE modified <= '\$oldate 01:01:01'\";" >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo 'mysql_query($notice_query);' >> $gnusocial_expire_script
    echo '$rowaff1=mysql_affected_rows();' >> $gnusocial_expire_script
    echo 'mysql_query($conversation_query);' >> $gnusocial_expire_script
    echo '$rowaff2=mysql_affected_rows();' >> $gnusocial_expire_script
    echo 'mysql_query($reply_query);' >> $gnusocial_expire_script
    echo '$rowaff3=mysql_affected_rows();' >> $gnusocial_expire_script
    echo 'mysql_close();' >> $gnusocial_expire_script
    echo '' >> $gnusocial_expire_script
    echo 'echo "Expire GNU Social posts: $rowaff1 notices, $rowaff2 conversations, and $rowaff3 replies deleted from database.\n";' >> $gnusocial_expire_script
    chmod +x $gnusocial_expire_script

    # Add a cron job
    if ! grep -q "$gnusocial_expire_script" /etc/crontab; then
        echo "10 3 5   *   *   root /usr/bin/timeout 500 /usr/bin/php $gnusocial_expire_script" >> /etc/crontab
    fi

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

function install_gnusocial_theme {
    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter "GNU Social theme commit" "$MICROBLOG_THEME_COMMIT" $MICROBLOG_THEME_REPO

    # customise with project logo
    if [ -f /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter/img/sprite.png ]; then
        if [ -f ~/freedombone/img/gnusocial_sprite.png ]; then
            cp ~/freedombone/img/gnusocial_sprite.png /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter/img/sprite.png
        fi
    fi

    if grep -Fxq "install_gnusocial_theme" $COMPLETION_FILE; then
        return
    fi

    apt-get -y install wget

    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins ]; then
        mkdir -p /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins
    function_check git_clone
    git_clone $MICROBLOG_THEME_REPO Qvitter
    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter
    git checkout $MICROBLOG_THEME_COMMIT -b $MICROBLOG_THEME_COMMIT

    # download a custom background image
    MICROBLOG_BACKGROUND_IMAGE_URL_EXT=
    if [ $MICROBLOG_BACKGROUND_IMAGE_URL ]; then
        if [[ $$MICROBLOG_BACKGROUND_IMAGE_URL == *".jpeg" || $$MICROBLOG_BACKGROUND_IMAGE_URL == *".jpg" ]]; then
            MICROBLOG_BACKGROUND_IMAGE_URL_EXT="jpg"
        fi
        if [[ $$MICROBLOG_BACKGROUND_IMAGE_URL == *".png" ]]; then
            MICROBLOG_BACKGROUND_IMAGE_URL_EXT="png"
        fi
        if [[ $$MICROBLOG_BACKGROUND_IMAGE_URL == *".gif" ]]; then
            MICROBLOG_BACKGROUND_IMAGE_URL_EXT="gif"
        fi
        if [ $MICROBLOG_BACKGROUND_IMAGE_URL_EXT ]; then
            wget $MICROBLOG_BACKGROUND_IMAGE_URL -O img/custom.${MICROBLOG_BACKGROUND_IMAGE_URL_EXT}
            if [ ! -f img/custom.${MICROBLOG_BACKGROUND_IMAGE_URL_EXT} ]; then
                echo "$MICROBLOG_BACKGROUND_IMAGE_URL"
                echo $'Custom background image for microblog could not be downloaded'
                exit 87524
            fi
        fi
    fi

    microblog_config_file=/var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
    if ! grep -q "addPlugin('Qvitter')" $microblog_config_file; then
        MICROBLOG_WELCOME_MESSAGE=$(echo $MICROBLOG_WELCOME_MESSAGE | sed "s|\$MICROBLOG_DOMAIN_NAME|$MICROBLOG_DOMAIN_NAME|g")
        echo "" >> $microblog_config_file
        echo "// Qvitter settings" >> $microblog_config_file
        echo "addPlugin('Qvitter');" >> $microblog_config_file
        echo "\$config['site']['qvitter']['enabledbydefault'] = true;" >> $microblog_config_file
        echo "\$config['site']['qvitter']['defaultbackgroundcolor'] = '#f4f4f4';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['defaultlinkcolor'] = '#0084B4';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['timebetweenpolling'] = 30000; // 30 secs" >> $microblog_config_file
        echo "\$config['site']['qvitter']['urlshortenerapiurl'] = 'http://qttr.at/shortener.php';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['urlshortenersignature'] = 'b6afeec983';" >> $microblog_config_file
        if [ $MICROBLOG_BACKGROUND_IMAGE_URL ]; then
            echo "\$config['site']['qvitter']['sitebackground'] = 'img/custom.${MICROBLOG_BACKGROUND_IMAGE_URL_EXT}';" >> $microblog_config_file
        else
            echo "\$config['site']['qvitter']['sitebackground'] = 'img/vagnsmossen.jpg';" >> $microblog_config_file
        fi
        echo "\$config['site']['qvitter']['favicon'] = 'img/favicon.ico?v=4';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['sprite'] = Plugin::staticPath('Qvitter', '').'img/sprite.png?v=40';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['enablewelcometext'] = true;" >> $microblog_config_file
        echo "\$config['site']['qvitter']['customwelcometext']['en'] = '$MICROBLOG_WELCOME_MESSAGE';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['customwelcometext']['de'] = '$MICROBLOG_WELCOME_MESSAGE';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['customwelcometext']['fr'] = '$MICROBLOG_WELCOME_MESSAGE';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['customwelcometext']['es'] = '$MICROBLOG_WELCOME_MESSAGE';" >> $microblog_config_file
        echo "\$config['site']['qvitter']['blocked_ips'] = array();" >> $microblog_config_file
    else
        if [ $MICROBLOG_BACKGROUND_IMAGE_URL_EXT ]; then
            if [ -f img/custom.${MICROBLOG_BACKGROUND_IMAGE_URL_EXT} ]; then
                sed -i "s|\$config['site']['qvitter']['sitebackground'].*|\$config['site']['qvitter']['sitebackground'] = 'img/custom.${MICROBLOG_BACKGROUND_IMAGE_URL_EXT}';|g" $microblog_config_file
            fi
        fi
    fi

    # customise with project logo
    if [ -f /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter/img/sprite.png ]; then
        if [ -f ~/freedombone/img/gnusocial_sprite.png ]; then
            cp ~/freedombone/img/gnusocial_sprite.png /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/Qvitter/img/sprite.png
        fi
    fi

    if ! grep -q "GNU Social theme commit" $COMPLETION_FILE; then
        echo "GNU Social theme commit:$MICROBLOG_THEME_COMMIT" >> $COMPLETION_FILE
    fi

    chown -R www-data:www-data /var/www/$MICROBLOG_DOMAIN_NAME/htdocs

    echo 'install_gnusocial_theme' >> $COMPLETION_FILE
}

function install_gnusocial_markdown {
    MICROBLOG_PATH=/var/www/$MICROBLOG_DOMAIN_NAME/htdocs

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit $MICROBLOG_PATH/local/plugins/Markdown "GNU Social Markdown commit" "$MICROBLOG_MARKDOWN_COMMIT" $MICROBLOG_MARKDOWN_REPO

    if grep -Fxq "install_gnusocial_markdown" $COMPLETION_FILE; then
        return
    fi

    if [ -d $MICROBLOG_PATH/local/plugins/Markdown ]; then
        rm -rf $MICROBLOG_PATH/local/plugins/Markdown
    fi

    if [ ! -d $MICROBLOG_PATH/local/plugins ]; then
        mkdir -p $MICROBLOG_PATH/local/plugins
    fi

    cd $MICROBLOG_PATH/local/plugins
    function_check git_clone
    git_clone $MICROBLOG_MARKDOWN_REPO Markdown
    cd $MICROBLOG_PATH/local/plugins/Markdown
    git checkout $MICROBLOG_MARKDOWN_COMMIT -b $MICROBLOG_MARKDOWN_COMMIT

    microblog_config_file=$MICROBLOG_PATH/config.php
    if ! grep -q "addPlugin('Markdown'" $microblog_config_file; then
        echo "" >> $microblog_config_file
        echo "// Markdown settings" >> $microblog_config_file
        echo "addPlugin('Markdown');" >> $microblog_config_file
    fi

    if ! grep -q "GNU Social Markdown commit" $COMPLETION_FILE; then
        echo "GNU Social Markdown commit:$MICROBLOG_MARKDOWN_COMMIT" >> $COMPLETION_FILE
    fi

    chown -R www-data:www-data $MICROBLOG_PATH

    echo 'install_gnusocial_markdown' >> $COMPLETION_FILE
}

function install_gnusocial_plugin_nsfw {
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins ]; then
        echo $'No local/plugins directory found for the microblog'
        exit 37252
    fi

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins "GNU Social NSFW plugin commit" "$GNUSOCIAL_NSFW_COMMIT" $GNUSOCIAL_NSFW_REPO

    if grep -Fxq "install_gnusocial_plugin_nsfw" $COMPLETION_FILE; then
        return
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins
    function_check git_clone
    git_clone $GNUSOCIAL_NSFW_REPO NSFW
    if [ ! -d /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/NSFW ]; then
        echo $'Unable to clone microblog NSFW plugin'
        exit 36738
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/local/plugins/NSFW
    git stash
    git checkout master
    git branch -D $GNUSOCIAL_NSFW_COMMIT
    git checkout $GNUSOCIAL_NSFW_COMMIT -b $GNUSOCIAL_NSFW_COMMIT

    # enable the plugin
    if ! grep -q "addPlugin('SensitiveContent');" /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php; then
        echo "addPlugin('SensitiveContent');" >> /var/www/$MICROBLOG_DOMAIN_NAME/htdocs/config.php
    fi

    cd /var/www/$MICROBLOG_DOMAIN_NAME/htdocs
    php scripts/checkschema.php

    chown -R www-data:www-data /var/www/$MICROBLOG_DOMAIN_NAME/htdocs

    if ! grep -q "GNU Social NSFW plugin commit" $COMPLETION_FILE; then
        echo "GNU Social NSFW plugin commit:$GNUSOCIAL_NSFW_COMMIT" >> $COMPLETION_FILE
    else
        sed -i "s|GNU Social NSFW plugin commit.*|GNU Social NSFW plugin commit:$GNUSOCIAL_NSFW_COMMIT|g" $COMPLETION_FILE
    fi
    echo 'install_gnusocial_plugin_nsfw' >> $COMPLETION_FILE
}

function install_gnusocial {
    if grep -Fxq "install_gnusocial" $COMPLETION_FILE; then
        return
    fi
    install_gnusocial_main
    expire_gnusocial_posts
    install_gnusocial_theme
    install_gnusocial_markdown
    install_gnusocial_plugin_sharings
    install_gnusocial_plugin_sharings_theme
    install_gnusocial_plugin_nsfw
    echo 'install_gnusocial' >> $COMPLETION_FILE
}

# NOTE: deliberately there is no "exit 0"