bootstrap

#!/bin/bash

# Get parameters function
# This function will check all the parameters 
# Return:
#   string: params to run the server
#   int: -1 is something is wrong.

getparams() {
    # Basic + default params values same order that PDF:
    ##  -nographics: basic param for the valheim documentation.
    ##  -batchmode: basic param for the valheim documentation.
    params="-nographics -batchmode"

    ## -name: Name of the server:
    ## Enter the name of your server that will be visible in the Server list.
    if [[ -z "${NAME}" ]]; then
        echo "The variable NAME is not defined. Please, fix and run again."
        return -1
    else
        params="$params -name ${NAME}"
    fi

    ##  -port: used the value of the param if defined, if not it will use standard port (2456).
    ##  Choose the Port which you want the server to communicate with. Please note that this has to 
    ##  correspond with the Port Forwarding settings on your Router. Valheim uses the specified Port AND 
    ##  specified Port+1. Default Ports are 2456-2457
    params="$params -port ${PORT:-2456}"

    ##  -world: Name of the world
    ##  A World with the name entered will be created. 
    ##  You may also choose an already existing World by entering its name
    if [[ -z "${WORLD}" ]]; then
        echo "The variable WORLD is not defined. Fixed and run again."
        return -1
    else
        params="$params -world ${WORLD}"
    fi

    ## -password: Password for the server, if not defined, no password = free access:
    if [[ -z "${PASSWORD}" ]]; then
        echo "The variable PASSWORD is not defined. Running WITHOUT password."
    else
        params="$params -password ${PASSWORD}"
    fi

    ##  -savedir: Where the data will be saved.
    ##  Overrides the default save path where Worlds and permission-files are stored.
    ##  Save folder for the data (if not defined can run, but the world will be saved on the container, bad idea):
    if [[ -z "${SAVEDIR}" ]]; then
        echo "The variable SAVEDIR is not defined. Fixed and run again."
        return -1
    else
        params="$params -savedir ${SAVEDIR}"
    fi

    ##  -public: used the value of the param if defined, if not it will be a public server (1).
    ##  Sets the visibility of your server. 1 is default and will make the server visible in the browser.
    ##  Set it to 0 to make the server invisible and only joinable via the ‘Join IP’-button.
    ##  Setting public to 0 is a good option if you wish to run a local LAN server, where players can join via
    ##  the local IP of the server.
    params="$params -public ${PUBLIC:-1}"

    ##  -logFile: Sets the location to save the log file.
    if [[ -z "${LOGFILE}" ]]; then
        echo "The variable LOGFILE is not defined. The messages will be displayed on standard output."
    else
        params="$params -logFile ${LOGFILE}"
    fi

    ##  -saveinterval: Change how often the world will save in seconds.
    params="$params -saveinterval ${SAVEINTERVAL:-1800}"

    ##  -backups: Sets how many automatic backups will be kept. 
    ##  The first is the ‘short’ backup length, and the rest are the ‘long’ backup length.
    ##  By default that means one backup that is 2 hours old, and 3 backups that are 12 hours apart.
    params="$params -backups ${BACKUPS:-4}"

    ##  -backupshort: Sets the interval between the first automatic backups.
    ##  Default is 2 hours (7200 seconds).
    params="$params -backupshort ${SAVEINTERVAL:-7200}"

    ##  -backuplong: Sets the interval between the subsequent automatic backups.
    ##  Default is 12 hours (43200 seconds).
    params="$params -backuplong ${SAVEINTERVAL:-43200}"

    ##  -crossplay: Runs the Server on the Crossplay backend (PlayFab), which lets users from any platform join.
    ##  If you do not include this argument (or set to FALSE in the env file), the Steam backend is used, which 
    ##  means only Steam users can see and join the Server.
    if [ "${CROSSPLAY}" = "TRUE" ]; then
        params="$params -crossplay"
    fi
}

# Main function
main() {
    # Basic export for the BOX64 emulator
    echo "##############################"
    echo "Basic variables running box64:"
    echo "BOX64_LD_LIBRARY_PATH: ${BOX64_LD_LIBRARY_PATH}"
    echo "BOX64_LOG: ${BOX64_LOG}"
    echo "BOX64_TRACE_FILE: ${BOX64_TRACE_FILE}"
    echo "BOX64_TRACE: ${BOX64_TRACE}"
    echo "##############################"

    # Part of the standar code startup of the server:
    export templdpath="${LD_LIBRARY_PATH}"
    export LD_LIBRARY_PATH=./linux64:"${LD_LIBRARY_PATH}"
    export SteamAppId=${STEAMAPPID}
    
    # Move to the execution folder
    cd /root/valheim_server

    ## Checking the final parameters to use:
    echo "##############################"
    echo "Final Valheim parameters to run: $params"
    echo "##############################"

    # Starting the server:
    box64 ./valheim_server.x86_64 $params
}

getparams
main