122 lines
3.5 KiB
D
122 lines
3.5 KiB
D
module server_actions;
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import std.stdio;
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import std.process;
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import std.format;
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import std.algorithm;
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import std.array;
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import std.string;
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import std.file;
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import std.datetime;
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import mcrcd;
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import shared_utils.discord;
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import shared_utils.server_status;
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import server_metadata;
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import config;
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ServerStatus determineStatus(in ServerMetaData server) {
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const bool online = isServiceActive(server.serviceName);
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int playersOnline = 0;
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string[] playerNames;
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if (online) {
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MCRconResponse response = executeRconCommand(server, "list");
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string playersList;
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int tmp;
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response.text.formattedRead!"There are %d of a max of %d players online: %s"(
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playersOnline,
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tmp,
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playersList
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);
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playerNames = playersList.strip.split(",")
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.filter!(s => s !is null && s.strip.length > 0)
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.map!(s => s.strip)
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.array;
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}
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return ServerStatus(
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server.name,
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server.displayName,
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server.description,
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online,
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playersOnline,
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server.maxPlayers,
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playerNames.idup
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);
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}
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void startServer(in ServerMetaData server, in AgentConfig config) {
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writeln("Starting server " ~ server.name);
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Pid pid = spawnProcess(["sudo", "systemctl", "start", server.serviceName]);
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int result = wait(pid);
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if (result != 0) {
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string msg = format!"Starting server %s failed with code %d."(server.name, result);
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stderr.writeln(msg);
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throw new Exception(msg);
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}
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sendDiscordMessage(
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config.discordWebhookUrl,
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format!"Started server %s as a result of a user request."(server.name)
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);
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}
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void stopServer(in ServerMetaData server, in AgentConfig config) {
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writeln("Shutting down server " ~ server.name ~ " after a period of inactivity.");
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Pid pid = spawnProcess(["sudo", "systemctl", "stop", server.serviceName]);
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int result = wait(pid);
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if (result == 0) {
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removeIdleTrackerFileIfPresent(server);
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sendDiscordMessage(
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config.discordWebhookUrl,
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format!"Shut down server %s after inactivity for more than %d minutes."(
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server.name,
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config.serverInactivityTimeoutMinutes
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)
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);
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} else {
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stderr.writefln!"Failed to stop server %s. systemctl stop exited with code %d."(server.name, result);
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}
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}
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Duration getOrCreateIdleTrackerFileAndGetAge(in ServerMetaData server) {
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string filename = getIdleTrackerFilename(server);
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if (exists(filename)) {
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SysTime timestamp = std.file.timeLastModified(filename);
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return Clock.currTime - timestamp;
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} else {
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File f = File(filename, "w");
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f.close();
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writeln("Created idle tracker for server " ~ server.name ~ ".");
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return seconds(0);
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}
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}
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void removeIdleTrackerFileIfPresent(in ServerMetaData server) {
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string trackerFile = getIdleTrackerFilename(server);
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if (exists(trackerFile)) {
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std.file.remove(trackerFile);
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writeln("Removed idle tracker for server " ~ server.name);
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}
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}
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private MCRconResponse executeRconCommand(in ServerMetaData server, string command) {
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MCRcon rcon = new MCRcon();
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rcon.connect("127.0.0.1", server.rconPort);
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scope(exit) {
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rcon.disconnect();
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}
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rcon.login(server.rconPassword);
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return rcon.command(command);
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}
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private bool isServiceActive(string serviceName) {
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import std.process;
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Pid pid = spawnProcess(["systemctl", "is-active", "--quiet", serviceName]);
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int result = wait(pid);
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return result == 0;
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}
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private string getIdleTrackerFilename(in ServerMetaData server) {
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return "agent-idle-tracker__" ~ server.name ~ ".txt";
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}
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