#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# koel application
# https://gist.github.com/bplower/613a99156d603abac083
#
# License
# =======
#
# Copyright (C) 2017 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 media'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

KOEL_DOMAIN_NAME=
KOEL_CODE=
KOEL_ONION_PORT=8118
KOEL_PORT=9000
KOEL_REPO="https://github.com/phanan/koel"
KOEL_COMMIT='70464a8977b1058f3bd0a4ec77877fe7894d8d84'
KOEL_ADMIN_PASSWORD=

koel_variables=(ONION_ONLY
                KOEL_DOMAIN_NAME
                KOEL_CODE
                DDNS_PROVIDER
                MY_EMAIL_ADDRESS
                MY_USERNAME)

function remove_user_koel {
    remove_username="$1"

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

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

    ${PROJECT_NAME}-pass -u $new_username -a koel -p "$new_user_password"
    echo '0'
}

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

    if [[ $ONION_ONLY != "no" ]]; then
        KOEL_DOMAIN_NAME='koel.local'
    else
        KOEL_DETAILS_COMPLETE=
        while [ ! $KOEL_DETAILS_COMPLETE ]
        do
            data=$(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 $"Koel Configuration" \
                       --form $"\nPlease enter your Koel 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 3 \
                       $"Domain:" 1 1 "$(grep 'KOEL_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 25 33 40 \
                       $"Code:" 2 1 "$(grep 'KOEL_CODE' temp.cfg | awk -F '=' '{print $2}')" 2 25 33 255 \
                       2> $data
            else
                dialog --backtitle $"Freedombone Configuration" \
                       --title $"Koel Configuration" \
                       --form $"\nPlease enter your Koel 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 3 \
                       $"Domain:" 1 1 "$(grep 'KOEL_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 25 33 40 \
                       2> $data
            fi
            sel=$?
            case $sel in
                1) exit 1;;
                255) exit 1;;
            esac
            KOEL_DOMAIN_NAME=$(cat $data | sed -n 1p)
            if [ $KOEL_DOMAIN_NAME ]; then
                if [[ $KOEL_DOMAIN_NAME == "$HUBZILLA_DOMAIN_NAME" ]]; then
                    KOEL_DOMAIN_NAME=""
                fi
                TEST_DOMAIN_NAME=$KOEL_DOMAIN_NAME
                validate_domain_name
                if [[ $TEST_DOMAIN_NAME != $KOEL_DOMAIN_NAME ]]; then
                    KOEL_DOMAIN_NAME=
                    dialog --title $"Domain name validation" --msgbox "$TEST_DOMAIN_NAME" 15 50
                else
                    if [[ $DDNS_PROVIDER == "default@freedns.afraid.org" ]]; then
                        KOEL_CODE=$(cat $data | sed -n 2p)
                        validate_freedns_code "$KOEL_CODE"
                        if [ ! $VALID_CODE ]; then
                            KOEL_DOMAIN_NAME=
                        fi
                    fi
                fi
            fi
            if [ $KOEL_DOMAIN_NAME ]; then
                KOEL_DETAILS_COMPLETE="yes"
            fi
        done

        # save the results in the config file
        write_config_param "KOEL_CODE" "$KOEL_CODE"
    fi
    write_config_param "KOEL_DOMAIN_NAME" "$KOEL_DOMAIN_NAME"
    APP_INSTALLED=1
}

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

    read_config_param 'KOEL_DOMAIN_NAME'

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

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

    function_check create_database
    create_database koel "$KOEL_ADMIN_PASSWORD" $MY_USERNAME
}

function reconfigure_koel {
    echo -n ''
}

function configure_interactive_koel {
    echo -n ''
}

function upgrade_koel {
    if grep -q "koel domain" $COMPLETION_FILE; then
        KOEL_DOMAIN_NAME=$(get_completion_param "koel domain")
    fi

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$KOEL_DOMAIN_NAME/htdocs "koel commit" "$KOEL_COMMIT" $KOEL_REPO

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


function backup_local_koel {
    KOEL_DOMAIN_NAME='koel'
    if grep -q "koel domain" $COMPLETION_FILE; then
        KOEL_DOMAIN_NAME=$(get_completion_param "koel domain")
    fi

    source_directory=/var/www/${KOEL_DOMAIN_NAME}/htdocs
    if [ -d $source_directory ]; then
        dest_directory=koel
        function_check suspend_site
        suspend_site ${KOEL_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 koel

        function_check restart_site
        restart_site
    fi
}

function restore_local_koel {
    if ! grep -q "koel domain" $COMPLETION_FILE; then
        return
    fi
    KOEL_DOMAIN_NAME=$(get_completion_param "koel domain")
    if [ $KOEL_DOMAIN_NAME ]; then
        echo $"Restoring koel"
        temp_restore_dir=/root/tempkoel
        koel_dir=/var/www/${KOEL_DOMAIN_NAME}/htdocs

        function_check koel_create_database
        koel_create_database

        restore_database koel ${KOEL_DOMAIN_NAME}
        if [ -d $temp_restore_dir ]; then
            rm -rf $temp_restore_dir
        fi
    fi
}

function backup_remote_koel {
    if grep -q "koel domain" $COMPLETION_FILE; then
        KOEL_DOMAIN_NAME=$(get_completion_param "koel domain")
        temp_backup_dir=/var/www/${KOEL_DOMAIN_NAME}/htdocs
        if [ -d $temp_backup_dir ]; then
            function_check suspend_site
            suspend_site ${KOEL_DOMAIN_NAME}

            function_check backup_database_to_friend
            backup_database_to_friend koel

            echo $"Backing up Koel installation"

            function_check backup_directory_to_friend
            backup_directory_to_friend $temp_backup_dir koel

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

function restore_remote_koel {
    if grep -q "koel domain" $COMPLETION_FILE; then
        echo $"Restoring koel"
        KOEL_DOMAIN_NAME=$(get_completion_param "koel domain")

        # stop the daemons
        cd /var/www/${KOEL_DOMAIN_NAME}/htdocs
        su -c "sh scripts/stopdaemons.sh" -s /bin/sh www-data

        function_check koel_create_database
        koel_create_database

        function_check restore_database_from_friend
        restore_database_from_friend koel ${KOEL_DOMAIN_NAME}
        if [ -d /root/tempkoel ]; then
            rm -rf /root/tempkoel
        fi

        # start the daemons
        cd /var/www/${KOEL_DOMAIN_NAME}/htdocs
        su -c "sh scripts/startdaemons.sh" -s /bin/sh www-data
        echo $"Restore of koel complete"
    fi
}

function remove_koel {
    if [ ${#KOEL_DOMAIN_NAME} -eq 0 ]; then
        return
    fi
    function_check remove_nodejs
    remove_nodejs koel

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

    if [ -d /var/www/$KOEL_DOMAIN_NAME ]; then
        rm -rf /var/www/$KOEL_DOMAIN_NAME
    fi
    if [ -f /etc/nginx/sites-available/$KOEL_DOMAIN_NAME ]; then
        rm /etc/nginx/sites-available/$KOEL_DOMAIN_NAME
    fi
    function_check drop_database
    drop_database koel
    function_check remove_onion_service
    remove_onion_service koel ${KOEL_ONION_PORT}
    if grep -q "koel" /etc/crontab; then
        sed -i "/koel/d" /etc/crontab
    fi
    remove_app koel
    remove_completion_param install_koel
    sed -i '/koel/d' $COMPLETION_FILE
    remove_backup_database_local koel

    sed -i '/koel-firewall/d' /etc/crontab

    function_check remove_ddns_domain
    remove_ddns_domain $KOEL_DOMAIN_NAME
}

function install_koel_main {
    if [ ! $KOEL_DOMAIN_NAME ]; then
        echo $'No domain name was given for koel'
        exit 7359
    fi

    if [[ $(app_is_installed koel_main) == "1" ]]; then
        return
    fi

    koel_hourly_script koel $KOEL_DOMAIN_NAME

    function_check install_mariadb
    install_mariadb

    function_check get_mariadb_password
    get_mariadb_password

    function_check repair_databases_script
    repair_databases_script

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

    if [ ! -d /var/www/$KOEL_DOMAIN_NAME ]; then
        mkdir /var/www/$KOEL_DOMAIN_NAME
    fi
    if [ ! -d /var/www/$KOEL_DOMAIN_NAME/htdocs ]; then
        function_check git_clone
        git_clone $KOEL_REPO /var/www/$KOEL_DOMAIN_NAME/htdocs
        if [ ! -d /var/www/$KOEL_DOMAIN_NAME/htdocs ]; then
            echo $'Unable to clone koel repo'
            exit 365735
        fi
    fi

    cd /var/www/$KOEL_DOMAIN_NAME/htdocs
    git checkout $KOEL_COMMIT -b $KOEL_COMMIT
    set_completion_param "koel commit" "$KOEL_COMMIT"

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

    function_check koel_create_database
    koel_create_database

    function_check add_ddns_domain
    add_ddns_domain $KOEL_DOMAIN_NAME

    koel_nginx_site=/etc/nginx/sites-available/$KOEL_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect $KOEL_DOMAIN_NAME "index index.php"
        echo 'server {' >> $koel_nginx_site
        echo '  listen 443 ssl;' >> $koel_nginx_site
        echo '  listen [::]:443 ssl;' >> $koel_nginx_site
        echo "  server_name $KOEL_DOMAIN_NAME;" >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        function_check nginx_compress
        nginx_compress $KOEL_DOMAIN_NAME
        echo '' >> $koel_nginx_site
        echo '  # Security' >> $koel_nginx_site
        function_check nginx_ssl
        nginx_ssl $KOEL_DOMAIN_NAME

        function_check nginx_disable_sniffing
        nginx_disable_sniffing $KOEL_DOMAIN_NAME

        echo '  add_header Strict-Transport-Security max-age=15768000;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  # Logs' >> $koel_nginx_site
        echo '  access_log /dev/null;' >> $koel_nginx_site
        echo '  error_log /dev/null;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  # Root' >> $koel_nginx_site
        echo "  root /var/www/$KOEL_DOMAIN_NAME/htdocs;" >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  # Index' >> $koel_nginx_site
        echo '  index index.php;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  # Whitelist only index.php, robots.txt, and those start with public/ or api/' >> $koel_nginx_site
        echo '  if ($request_uri !~ ^/$|index\.php|robots\.txt|api/|public/) {' >> $koel_nginx_site
        echo '    return 404;' >> $koel_nginx_site
        echo '  }' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  location /media/ {' >> $koel_nginx_site
        echo '    internal;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '    # A X-Media-Root should be set to media_path settings from upstream' >> $koel_nginx_site
        echo '    alias       $upstream_http_x_media_root;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  }' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  location / {' >> $koel_nginx_site
        function_check nginx_limits
        nginx_limits $KOEL_DOMAIN_NAME '15m'
        echo '    try_files   $uri $uri/ /index.php?$args;' >> $koel_nginx_site
        echo '  }' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '  location ~ \.php$ {' >> $koel_nginx_site
        echo '    try_files $uri $uri/ /index.php?$args;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '    fastcgi_param     PATH_INFO $fastcgi_path_info;' >> $koel_nginx_site
        echo '    fastcgi_param     PATH_TRANSLATED $document_root$fastcgi_path_info;' >> $koel_nginx_site
        echo '    fastcgi_param     SCRIPT_FILENAME $document_root$fastcgi_script_name;' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo "    fastcgi_pass              127.0.0.1:$KOEL_PORT;" >> $koel_nginx_site
        echo '    fastcgi_index             index.php;' >> $koel_nginx_site
        echo '    fastcgi_split_path_info   ^(.+\.php)(/.+)$;' >> $koel_nginx_site
        echo '    fastcgi_intercept_errors  on;' >> $koel_nginx_site
        echo '    include                   fastcgi_params;' >> $koel_nginx_site
        echo '  }' >> $koel_nginx_site
        echo '' >> $koel_nginx_site
        echo '}' >> $koel_nginx_site
    else
        echo -n '' > $koel_nginx_site
    fi
    echo 'server {' >> $koel_nginx_site
    echo "    listen 127.0.0.1:$KOEL_ONION_PORT default_server;" >> $koel_nginx_site
    echo "    server_name $KOEL_DOMAIN_NAME;" >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    function_check nginx_compress
    nginx_compress $KOEL_DOMAIN_NAME
    echo '' >> $koel_nginx_site
    echo '  # Logs' >> $koel_nginx_site
    echo '  access_log /dev/null;' >> $koel_nginx_site
    echo '  error_log /dev/null;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  # Root' >> $koel_nginx_site
    echo "  root /var/www/$KOEL_DOMAIN_NAME/htdocs;" >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  # Index' >> $koel_nginx_site
    echo '  index index.php;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  # Whitelist only index.php, robots.txt, and those start with public/ or api/' >> $koel_nginx_site
    echo '  if ($request_uri !~ ^/$|index\.php|robots\.txt|api/|public/) {' >> $koel_nginx_site
    echo '    return 404;' >> $koel_nginx_site
    echo '  }' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  location /media/ {' >> $koel_nginx_site
    echo '    internal;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '    # A X-Media-Root should be set to media_path settings from upstream' >> $koel_nginx_site
    echo '    alias       $upstream_http_x_media_root;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  }' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  location / {' >> $koel_nginx_site
    function_check nginx_limits
    nginx_limits $KOEL_DOMAIN_NAME '15m'
    echo '    try_files   $uri $uri/ /index.php?$args;' >> $koel_nginx_site
    echo '  }' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '  location ~ \.php$ {' >> $koel_nginx_site
    echo '    try_files $uri $uri/ /index.php?$args;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '    fastcgi_param     PATH_INFO $fastcgi_path_info;' >> $koel_nginx_site
    echo '    fastcgi_param     PATH_TRANSLATED $document_root$fastcgi_path_info;' >> $koel_nginx_site
    echo '    fastcgi_param     SCRIPT_FILENAME $document_root$fastcgi_script_name;' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo "    fastcgi_pass              127.0.0.1:$KOEL_PORT;" >> $koel_nginx_site
    echo '    fastcgi_index             index.php;' >> $koel_nginx_site
    echo '    fastcgi_split_path_info   ^(.+\.php)(/.+)$;' >> $koel_nginx_site
    echo '    fastcgi_intercept_errors  on;' >> $koel_nginx_site
    echo '    include                   fastcgi_params;' >> $koel_nginx_site
    echo '  }' >> $koel_nginx_site
    echo '' >> $koel_nginx_site
    echo '}' >> $koel_nginx_site

    function_check configure_php
    configure_php

    function_check create_site_certificate
    create_site_certificate $KOEL_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 koel

    function_check nginx_ensite
    nginx_ensite $KOEL_DOMAIN_NAME

    KOEL_ONION_HOSTNAME=$(add_onion_service koel 80 ${KOEL_ONION_PORT})

    KOEL_SERVER=${KOEL_DOMAIN_NAME}
    if [[ $ONION_ONLY != 'no' ]]; then
        KOEL_SERVER=${KOEL_ONION_HOSTNAME}
    fi

    systemctl restart php5-fpm
    systemctl restart nginx

    ${PROJECT_NAME}-pass -u $MY_USERNAME -a koel -p "$KOEL_ADMIN_PASSWORD"

    set_completion_param "koel domain" "$KOEL_DOMAIN_NAME"

    install_completed koel_main
}

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

    function_check install_nodejs
    install_nodejs koel

    install_koel_main

    cd /var/www/$KOEL_DOMAIN_NAME/htdocs

    # curl -sS https://getcomposer.org/installer | php
    if [ -f ~/freedombone/image_build/composer_install ]; then
        cat ~/freedombone/image_build/composer_install | php
    else
        if [ -f /home/$MY_USERNAME/freedombone/image_build/composer_install ]; then
            cat /home/$MY_USERNAME/freedombone/image_build/composer_install | php
        fi
    fi
    npm install
    php composer install

    cp .env.example .env
    sed -i "s/ADMIN_EMAIL=.*/ADMIN_EMAIL=$MY_EMAIL_ADDRESS/g" .env
    sed -i "s/ADMIN_NAME=.*/ADMIN_NAME=$MY_USERNAME/g" .env
    sed -i "s/ADMIN_PASSWORD=.*/ADMIN_PASSWORD=$KOEL_ADMIN_PASSWORD/g" .env
    sed -i 's/DB_CONNECTION=.*/DB_CONNECTION=mysql/g' .env
    sed -i 's/DB_HOST=.*/DB_HOST=127.0.0.1/g' .env
    sed -i 's/DB_DATABASE=.*/DB_DATABASE=koel/g' .env
    sed -i 's/DB_USERNAME=.*/DB_USERNAME=root/g' .env
    sed -i "s/DB_PASSWORD=secret/DB_PASSWORD=$MARIADB_PASSWORD/g" .env

    php artisan koel:init
    php artisan serve --port=$KOEL_PORT

    chown -R www-data:www-data /var/www/$KOEL_DOMAIN_NAME/htdocs
    systemctl restart nginx

    APP_INSTALLED=1
}

# NOTE: deliberately there is no "exit 0"