#!/bin/bash
#
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# 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/>.

VARIANTS='full full-vim'

APP_CATEGORY=publishing

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1
SHOW_CLEARNET_ADDRESS_ON_ABOUT=0
NOT_ON_HOMEPAGE=1

SMOLRSS_DOMAIN_NAME=
SMOLRSS_CODE=
SMOLRSS_ONION_PORT=8751
SMOLRSS_REPO="https://code.freedombone.net/bashrc/smolrss"
SMOLRSS_COMMIT='a0e80ab89098028bc5ac77466b46ab8491ef0773'

SMOLRSS_SHORT_DESCRIPTION=$'RSS Reader'
SMOLRSS_DESCRIPTION=$'RSS Reader'
SMOLRSS_MOBILE_APP_URL=

smolrss_variables=(ONION_ONLY
                   SMOLRSS_DOMAIN_NAME
                   SMOLRSS_CODE
                   DDNS_PROVIDER
                   MY_USERNAME)

function smolrss_update_settings_template {
    # Creates rss feeds list within the web UI
    read_config_param SMOLRSS_DOMAIN_NAME
    # shellcheck disable=SC2154
    app_settings_screen_template="$webadmin_install_dir/settings_smolrss_template.html"
    app_settings_screen="$webadmin_install_dir/settings_smolrss.html"
    cp "$app_settings_screen_template" "$app_settings_screen"
    feedslist=$(sed 's@[/\&]@\\&@g;s/$/\\/' "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs/feeds.txt"; echo .)
    feedslist=${feedslist%.}
    sed -i "s|RSSFEEDS|$feedslist|g" "$app_settings_screen"
    chown www-data:www-data "$app_settings_screen"
}

function logging_on_smolrss {
    echo -n ''
}

function logging_off_smolrss {
    echo -n ''
}

function remove_user_smolrss {
    #remove_username="$1"
    echo -n ''
}

function add_user_smolrss {
    #new_username="$1"
    #new_user_password="$2"

    echo '0'
}

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

function change_password_smolrss {
    #curr_username="$1"
    #new_user_password="$2"
    echo -n ''
}

function reconfigure_smolrss {
    # This is used if you need to switch identity. Dump old keys and generate new ones
    echo -n ''
}

function smolrss_add_feed {
    data=$(mktemp 2>/dev/null)
    dialog --backtitle $"Smol RSS" \
           --title $"Add an RSS feed" \
           --form "\\n" 8 60 3 \
           $"Title:" 1 1 "" 1 12 40 256 \
           $"Feed URL:" 2 1 "" 2 12 40 10000 \
           2> "$data"
    sel=$?
    case $sel in
        1) rm -f "$data"
           return;;
        255) rm -f "$data"
             return;;
    esac
    title=$(sed -n 1p < "$data")
    url=$(sed -n 2p < "$data")
    rm -f "$data"

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

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

    if [[ "$url" == *','* ]]; then
        return
    fi
    if [[ "$url" != *'.'* ]]; then
        return
    fi

    cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || return

    if grep -q "${title}," feeds.txt; then
        sed -i "s|${title},.*|${title},${url}|g" feeds.txt
    else
        echo "${title},${url}" >> feeds.txt
    fi

    ./create_feeds feeds.txt > feeds.xml
    chown www-data:www-data feeds.txt

    dialog --title $"Add an RSS feed" \
           --msgbox $"${title} has been added" 6 70
}

function smolrss_remove_feed {
    data=$(mktemp 2>/dev/null)
    dialog --title $"Remove an RSS feed" \
           --backtitle $"Smol RSS" \
           --inputbox $"Enter the title of the feed to remove" 8 60 2>"$data"
    sel=$?
    case $sel in
        0)
            title=$(<"$data")
            if [ "$title" ]; then
                cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || return
                if grep -q "${title}," feeds.txt; then
                    sed -i "/${title},/d" feeds.xml
                    ./create_feeds feeds.txt > feeds.xml
                    chown www-data:www-data feeds.txt
                    dialog --title $"Remove an RSS feed" \
                           --msgbox $"${title} has been removed" 6 70
                fi
            fi
            ;;
    esac
    rm -f "$data"
}

function configure_interactive_smolrss {
    W=(1 $"Add an RSS feed"
       2 $"Remove an RSS feed"
       3 $'Edit all feeds'
       4 $'Light theme'
       5 $'Dark theme')

    read_config_param SMOLRSS_DOMAIN_NAME

    while true
    do

        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Smol RSS" --menu $"Choose an operation, or ESC for main menu:" 14 70 5 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi
        case $selection in
            1) smolrss_add_feed
               ;;
            2) smolrss_remove_feed
               ;;
            3) editor "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs/feeds.txt"
               cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || break
               ./create_feeds feeds.txt > feeds.xml
               chown www-data:www-data feeds.txt
               ;;
            4) cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || break
               cp style.light.css style.css
               chown www-data:www-data style.css
               dialog --title $"Smol RSS theme" \
                      --msgbox $"Switched theme to light" 6 50
               ;;
            5) cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || break
               cp style.dark.css style.css
               chown www-data:www-data style.css
               dialog --title $"Smol RSS theme" \
                      --msgbox $"Switched theme to dark" 6 50
               ;;
        esac
    done
}

function upgrade_smolrss {
    CURR_SMOLRSS_COMMIT=$(get_completion_param "smolrss commit")
    if [[ "$CURR_SMOLRSS_COMMIT" == "$SMOLRSS_COMMIT" ]]; then
        return
    fi

    if grep -q "smolrss domain" "$COMPLETION_FILE"; then
        SMOLRSS_DOMAIN_NAME=$(get_completion_param "smolrss domain")
    fi

    # update to the next commit
    set_repo_commit "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" "smolrss commit" "$SMOLRSS_COMMIT" "$SMOLRSS_REPO"

    cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || return
    ./create_feeds feeds.txt > feeds.xml

    chown -R www-data:www-data "/var/www/${SMOLRSS_DOMAIN_NAME}/htdocs"
}

function backup_local_smolrss {
    SMOLRSS_DOMAIN_NAME='smolrss'
    if grep -q "smolrss domain" "$COMPLETION_FILE"; then
        SMOLRSS_DOMAIN_NAME=$(get_completion_param "smolrss domain")
    fi

    source_directory=/var/www/${SMOLRSS_DOMAIN_NAME}/htdocs

    suspend_site "${SMOLRSS_DOMAIN_NAME}"

    dest_directory=smolrss
    backup_directory_to_usb "$source_directory" $dest_directory

    restart_site
}

function restore_local_smolrss {
    if ! grep -q "smolrss domain" "$COMPLETION_FILE"; then
        return
    fi
    SMOLRSS_DOMAIN_NAME=$(get_completion_param "smolrss domain")
    if [ ! "$SMOLRSS_DOMAIN_NAME" ]; then
        return
    fi
    suspend_site "${SMOLRSS_DOMAIN_NAME}"
    temp_restore_dir=/root/tempsmolrss
    smolrss_dir=/var/www/${SMOLRSS_DOMAIN_NAME}/htdocs

    restore_directory_from_usb $temp_restore_dir smolrss
    if [ -d $temp_restore_dir ]; then
        if [ -d "$temp_restore_dir$smolrss_dir" ]; then
            cp -rp "$temp_restore_dir$smolrss_dir"/* "$smolrss_dir"/
        else
            if [ ! -d "$smolrss_dir" ]; then
                mkdir "$smolrss_dir"
            fi
            cp -rp "$temp_restore_dir"/* "$smolrss_dir"/
        fi
        chown -R www-data:www-data "$smolrss_dir"
        rm -rf $temp_restore_dir
    fi
    restart_site
}

function backup_remote_smolrss {
    echo -n ''
}

function restore_remote_smolrss {
    echo -n ''
}

function remove_smolrss {
    nginx_dissite "$SMOLRSS_DOMAIN_NAME"
    remove_certs "$SMOLRSS_DOMAIN_NAME"


    if [ -d "/var/www/$SMOLRSS_DOMAIN_NAME" ]; then
        rm -rf "/var/www/$SMOLRSS_DOMAIN_NAME"
    fi
    if [ -f "/etc/nginx/sites-available/$SMOLRSS_DOMAIN_NAME" ]; then
        rm "/etc/nginx/sites-available/$SMOLRSS_DOMAIN_NAME"
    fi
    remove_onion_service smolrss "${SMOLRSS_ONION_PORT}"
    if grep -q "smolrss" /etc/crontab; then
        sed -i "/smolrss/d" /etc/crontab
    fi
    remove_app smolrss
    remove_completion_param install_smolrss
    sed -i '/smolrss/d' "$COMPLETION_FILE"

    webadmin_remove_settings smolrss
    remove_ddns_domain "$SMOLRSS_DOMAIN_NAME"
}

function install_smolrss {
    increment_app_install_progress

    $INSTALL_PACKAGES php-gettext php-curl php-gd php-mysql git curl

    increment_app_install_progress

    $INSTALL_PACKAGES memcached php-memcached php-intl exiftool libfcgi0ldbl

    increment_app_install_progress

    SMOLRSS_DOMAIN_NAME='smolrss.local'

    if [ -d "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" ]; then
        rm -rf "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"
    fi
    mkdir "/var/www/$SMOLRSS_DOMAIN_NAME"
    if [ -d /repos/smolrss ]; then
        mkdir -p "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"
        cp -r -p /repos/smolrss/. "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"
        cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || exit 324687356
        git pull
    else
        git_clone "$SMOLRSS_REPO" "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"
    fi

    if [ ! -d "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" ]; then
        echo $'Unable to clone smolrss repo'
        exit 87525
    fi

    increment_app_install_progress

    cd "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs" || exit 36587356
    git checkout "$SMOLRSS_COMMIT" -b "$SMOLRSS_COMMIT"
    set_completion_param "smolrss commit" "$SMOLRSS_COMMIT"

    increment_app_install_progress

    cp feeds.example.txt feeds.txt
    ./create_feeds feeds.txt > feeds.xml

    increment_app_install_progress

    chmod g+w "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"
    chown -R www-data:www-data "/var/www/$SMOLRSS_DOMAIN_NAME/htdocs"

    add_ddns_domain "$SMOLRSS_DOMAIN_NAME"

    SMOLRSS_ONION_HOSTNAME=$(add_onion_service smolrss 80 "${SMOLRSS_ONION_PORT}")

    increment_app_install_progress

    smolrss_nginx_site=/etc/nginx/sites-available/$SMOLRSS_DOMAIN_NAME
    echo -n '' > "$smolrss_nginx_site"
    { echo 'server {';
      echo "    listen 127.0.0.1:$SMOLRSS_ONION_PORT default_server;";
      echo '    port_in_redirect off;';
      echo "    server_name $SMOLRSS_ONION_HOSTNAME;";
      echo ''; } >> "$smolrss_nginx_site"
    nginx_compress "$SMOLRSS_DOMAIN_NAME"
    echo '' >> "$smolrss_nginx_site"
    nginx_security_options "$SMOLRSS_DOMAIN_NAME"
    { echo '';
      echo '    access_log /dev/null;';
      echo '    error_log /dev/null;';
      echo '';
      echo "    root /var/www/$SMOLRSS_DOMAIN_NAME/htdocs;";
      echo '';
      echo '  index index.php;';
      echo '  location ~ \.php {';
      echo '    include snippets/fastcgi-php.conf;';
      echo "    fastcgi_pass unix:/var/run/php/php${PHP_VERSION}-fpm.sock;";
      echo '    fastcgi_read_timeout 30;';
      echo '    fastcgi_param HTTPS off;';
      echo '  }';
      echo '';
      echo '  # Location';
      echo '  location / {'; } >> "$smolrss_nginx_site"
    nginx_limits "$SMOLRSS_DOMAIN_NAME" '15m'
    { echo "    try_files \$uri \$uri/ index.php?\$args;";
      echo '  }';
      echo '}'; } >> "$smolrss_nginx_site"

    configure_php

    increment_app_install_progress

    nginx_ensite "$SMOLRSS_DOMAIN_NAME"

    # shellcheck disable=SC2086
    systemctl restart php${PHP_VERSION}-fpm

    increment_app_install_progress

    systemctl restart nginx

    increment_app_install_progress

    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a smolrss -p "$SMOLRSS_ADMIN_PASSWORD"
    set_completion_param "smolrss domain" "$SMOLRSS_DOMAIN_NAME"

    APP_INSTALLED=1
}

# NOTE: deliberately there is no "exit 0"