#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Create a screen which can be used as a browser home
# page to get quick access to your apps
#
# License
# =======
#
# Copyright © 2018-2019 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/>.

function homepage_create_qr_code {
    webadmin_onion_domain="$1"

    if [ -f "$homepage_install_dir/images/homepage_qrcode.png" ]; then
        return
    fi

    if [ ! -f /usr/local/bin/myqr ]; then
        echo -n "http://${webadmin_onion_domain}/home" | qrencode -t PNG -o "$homepage_install_dir/images/homepage_qrcode.png"
    else
        myqr "http://${webadmin_onion_domain}/home" -p "/root/${PROJECT_NAME}/img/onion.png" -c -v 8 -n "$homepage_install_dir/images/homepage_qrcode.png"
    fi
}

function web_create_homepage {
    web_admin_get_hostname
    homepage_install_dir="/var/www/${local_hostname}/htdocs/home"

    homepage_filename="$homepage_install_dir/index.html"
    homepage_about_filename="$homepage_install_dir/about.html"

    homepage_template_filename="$webadmin_install_dir/homepage_template.html"
    icons_dir="$homepage_install_dir/icons"
    pending_removes="$webadmin_install_dir/pending_removes.txt"

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

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

    # NOTE: Here we don't use the icons from the admin directory
    # because that is password controlled. So that any user on the system
    # can use the homepage the icons are copied over to the home directory

    # copy the icons
    cp -r "$webadmin_install_dir/icons"/*.png "$icons_dir"

    # copy the logo
    if [ ! -d "$homepage_install_dir/images" ]; then
        mkdir -p "$homepage_install_dir/images"
    fi
    cp "$webadmin_install_dir/images/logo.png" "$homepage_install_dir/images"

    # copy the script used for search
    cp "$webadmin_install_dir/search.php" "$homepage_install_dir"

    if [ ! -f "$homepage_template_filename" ]; then
        return
    fi
    cp "$homepage_template_filename" "$homepage_filename"

    sed -i '/<\/div> <!-- header -->/d' "$homepage_filename"
    sed -i '/<\/body>/d' "$homepage_filename"
    sed -i '/<\/html>/d' "$homepage_filename"

    # copy the about screen for homepage
    cp "$webadmin_install_dir/homepage_about.html" "$homepage_about_filename"

    # show onion address for homepage
    webadmin_onion_domain=$(cat /var/lib/tor/hidden_service_webadmin/hostname)
    sed -i "s|WEBADMINONIONADDRESS|${webadmin_onion_domain}|g" "$homepage_about_filename"
    homepage_create_qr_code "$webadmin_onion_domain"

    total_apps_ctr=0
    installed_apps_ctr=0
    app_index=0
    # shellcheck disable=SC2068,SC2034
    for a in ${APPS_INSTALLED[@]}
    do
        app_name=${APPS_INSTALLED_NAMES[$app_index]}
        if [ "$app_name" ]; then
            app_filename="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}"
            if [ -f "$app_filename" ]; then

                # check if the app is being removed
                app_being_removed=
                if [ -f "$pending_removes" ]; then
                    if grep -q "remove_${app_name}" "$pending_removes"; then
                        app_being_removed=1
                    fi
                fi

                if [ ! $app_being_removed ]; then
                    if grep -q "NOT_ON_HOMEPAGE=1" "$app_filename"; then
                        app_index=$((app_index+1))
                        continue
                    fi

                    # get the icon for the app
                    icon_filename="/usr/share/${PROJECT_NAME}/android-app/${app_name}.png"
                    if [ ! -f "$icon_filename" ]; then
                        icon_filename=
                    fi

                    app_name_upper=$(echo "$app_name" | awk '{print toupper($0)}')

                    if ! grep -q "${app_name_upper}_DOMAIN_NAME=" "$app_filename"; then
                        app_index=$((app_index+1))
                        continue
                    fi

                    read_config_param "${app_name_upper}_DOMAIN_NAME"
                    read_config_param ONION_ONLY
                    onion_app_name=${app_name}
                    if [[ "$onion_app_name" == 'xmpp' ]]; then
                        onion_app_name='email'
                    fi
                    if [[ "$ONION_ONLY" == 'no' ]]; then
                        if grep -q "INSTALLED_ON_DEFAULT_DOMAIN=1" "$app_filename"; then
                            read_config_param DEFAULT_DOMAIN_NAME
                            domain_name=$DEFAULT_DOMAIN_NAME
                        else
                            test_domain_name="${app_name_upper}_DOMAIN_NAME"
                            domain_name=${!test_domain_name}
                        fi
                    else
                        domain_name=$(cat "/var/lib/tor/hidden_service_${onion_app_name}/hostname")
                    fi
                    onion_domain_name=
                    if [ -f "/var/lib/tor/hidden_service_${onion_app_name}/hostname" ]; then
                        onion_domain_name=$(cat "/var/lib/tor/hidden_service_${onion_app_name}/hostname")
                    fi
                    if [ "$domain_name" ]; then
                        if [[ "$domain_name" != *'.onion' ]]; then
                            domain_name="https://${domain_name}"
                        else
                            domain_name="http://${onion_domain_name}"
                        fi
                    else
                        app_index=$((app_index+1))
                        continue
                    fi

                    if [ $installed_apps_ctr -eq 0 ]; then
                        echo '    <div class="row">' >> "$homepage_filename"
                    fi

                    SHORT_DESCRIPTION="$(grep "${app_name_upper}_SHORT_DESCRIPTION=" "$app_filename" | head -n 1 | sed 's|\$||g' | sed "s|'||g" | sed 's|\"||g' | awk -F '=' '{print $2}')"

                    translated_short_description=$(web_admin_translate_text "$SHORT_DESCRIPTION")
                    SHORT_DESCRIPTION="$translated_short_description"
                    app_title="${SHORT_DESCRIPTION}"

                    if grep -q "${app_name_upper}_DESCRIPTION=" "$app_filename"; then
                        DESCRIPTION="$(grep "${app_name_upper}_DESCRIPTION=" "$app_filename" | head -n 1 | sed 's|\$||g' | sed "s|'||g" | sed 's|\"||g' | awk -F '=' '{print $2}')"
                        translated_description=$(web_admin_translate_text "$DESCRIPTION")
                        DESCRIPTION="$translated_description"
                        app_title="${DESCRIPTION}"
                    fi

                    { echo '      <div class="column">';
                      echo '        <div>';
                      echo "          <a href=\"$domain_name\" title=\"${app_title}\">";
                      echo "            <img src=\"icons/${app_name}.png\" style=\"width:40%\">";
                      echo "            <center>${app_name}</center>";
                      echo '          </a>';
                      echo '        </div>';
                      echo '      </div>'; } >> "$homepage_filename"

                    installed_apps_ctr=$((installed_apps_ctr+1))
                    total_apps_ctr=$((total_apps_ctr+1))

                    # four columns per row
                    if [ $installed_apps_ctr -eq 4 ]; then
                        echo '    </div>' >> "$homepage_filename"
                        installed_apps_ctr=0
                    fi
                fi
            fi
        fi
        app_index=$((app_index+1))
    done

    if [ ${installed_apps_ctr} -gt 0 ]; then
        # Complete the rest of the four column row
        # shellcheck disable=SC2034
        for i in $(seq ${installed_apps_ctr} 3)
        do
            { echo '      <div class="column">';
              echo '        <div>';
              echo '        </div>';
              echo '      </div>'; } >> "$homepage_filename"
        done
        echo '    </div>' >> "$homepage_filename"
    fi

    if [ $total_apps_ctr -gt 0 ]; then
        sed -i "/\"appstext\"/d" "$homepage_filename"
    fi

    { echo '    </div>';
      echo '    <br><br>';
      echo '  </body>';
      echo '</html>'; } >> "$homepage_filename"

    chown -R www-data:www-data "$homepage_install_dir"
}

# NOTE: deliberately no exit 0