2024-06-27 15:58:40 +00:00
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import std.stdio;
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import std.algorithm;
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import std.array;
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2024-08-03 18:15:41 +00:00
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import std.json;
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2024-06-27 15:58:40 +00:00
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import std.datetime;
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import requests;
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import shared_utils.server_status;
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2024-08-03 18:15:41 +00:00
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import config;
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import server_metadata;
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import server_actions;
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2024-06-27 15:58:40 +00:00
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/**
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* This program will run frequently (maybe every minute or more), and does the following:
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* - Fetches a list of requested servers from the mc-server-manager API, and starts them.
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* - Checks for any servers without any players online, and writes a blank file to track.
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* - For servers with nobody online, and a timestamp file older than N minutes, the server is shut down.
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*/
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void main() {
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AgentConfig config = readConfig();
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2024-08-03 18:15:41 +00:00
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ServerMetaData[] servers = readServerMetaData();
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ServerStatus[] statuses = servers.map!(determineStatus).array;
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2024-06-27 15:58:40 +00:00
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try {
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sendServerStatusToWeb(statuses, config);
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} catch (Exception e) {
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stderr.writeln(e.msg);
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}
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checkForEmptyServers(servers, statuses, config);
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try {
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startRequestedServers(servers, config);
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} catch (Exception e) {
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stderr.writeln(e.msg);
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}
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}
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2024-08-03 18:15:41 +00:00
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void sendServerStatusToWeb(in ServerStatus[] statuses, in AgentConfig config) {
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2024-06-27 15:58:40 +00:00
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JSONValue jsonPayload = serializeServerStatuses(statuses);
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string payload = jsonPayload.toJSON();
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Request rq = Request();
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rq.addHeaders(["X-Agent-Key": config.agentKey]);
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Response resp = rq.post(config.webUrl ~ "/api/servers", payload, "application/json");
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if (resp.code >= 300) {
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import std.format;
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throw new Exception(
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format!"Failed to post server statuses: Error code %d, Response body: %s"(
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resp.code,
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resp.responseBody
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)
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);
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}
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}
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2024-08-03 18:15:41 +00:00
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void startRequestedServers(ServerMetaData[] servers, AgentConfig config) {
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2024-06-27 15:58:40 +00:00
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auto content = getContent(config.webUrl ~ "/api/server-requests");
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JSONValue jsonContent = parseJSON(cast(string) content.data);
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2024-08-03 18:15:41 +00:00
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string[] requestedServerNames = jsonContent.array()
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.map!(node => node.str)
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.array;
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2024-06-27 15:58:40 +00:00
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foreach (server; servers) {
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2024-08-03 18:15:41 +00:00
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if (canFind(requestedServerNames, server.name)) {
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startServer(server, config);
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2024-06-27 15:58:40 +00:00
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}
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}
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}
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2024-08-03 18:15:41 +00:00
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void checkForEmptyServers(ServerMetaData[] servers, ServerStatus[] statuses, AgentConfig config) {
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foreach (i, server; servers) {
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ServerStatus status = statuses[i];
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2024-08-03 18:15:41 +00:00
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if (status.online && status.playersOnline > 0) {
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removeIdleTrackerFileIfPresent(server);
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2024-06-27 15:58:40 +00:00
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} else if (status.online && status.playersOnline == 0) {
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2024-08-03 18:15:41 +00:00
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const Duration idleTime = getOrCreateIdleTrackerFileAndGetAge(server);
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if (idleTime.total!"minutes" > config.serverInactivityTimeoutMinutes) {
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stopServer(server, config);
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2024-06-27 15:58:40 +00:00
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}
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}
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}
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}
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