87 lines
2.8 KiB
D
87 lines
2.8 KiB
D
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module server_metadata;
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import std.json;
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import std.file;
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import std.path;
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import std.string : endsWith;
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import std.array;
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import std.algorithm;
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import std.stdio;
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import properd;
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/**
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* The set of information about each server that we can obtain by reading the
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* server's directory and files in it (service file, properties, etc.).
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*/
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struct ServerMetaData {
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/// The name of the server, as declared in servers.json.
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const string name;
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/// The display name of the server, as declared in servers.json.
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const string displayName;
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/// The description of the server, as declared in servers.json.
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const string description;
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/// The directory to find the server's files in.
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const string directory;
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/// The name of the server's SystemD service, as determined by searching the server's directory.
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const string serviceName;
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/// The port used for player connections.
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const ushort port;
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/// The password for connecting to the RCON service of the server.
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const string rconPassword;
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/// The port for connecting to the RCON service.
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const ushort rconPort;
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/// The maximum number of players for the server.
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const int maxPlayers;
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}
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/**
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* Reads server metadata from each server defined in "servers.json", by parsing
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* its "server.properties" file, SystemD service file, and more.
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* Returns: The list of server metadata structs.
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*/
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ServerMetaData[] readServerMetaData() {
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import properd;
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JSONValue arr = parseJSON(readText("servers.json"));
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return arr.array.map!((s) {
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string name = s.object["name"].str;
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string displayName = s.object["displayName"].str;
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string description = s.object["description"].str;
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string directory = s.object["directory"].str;
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string systemDServiceName = findSystemDServiceName(directory);
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string propsFile = buildPath(directory, "server.properties");
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if (!exists(propsFile)) throw new Exception("Missing server properties file: " ~ propsFile);
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try {
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auto props = readProperties(propsFile);
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ushort port = props.as!(ushort)("server-port");
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string rconPassword = props["rcon.password"];
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ushort rconPort = props.as!(ushort)("rcon.port");
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int maxPlayers = props.as!(int)("max-players");
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return ServerMetaData(
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name,
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displayName,
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description,
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directory,
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systemDServiceName,
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port,
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rconPassword,
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rconPort,
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maxPlayers
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);
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} catch (PropertyException e) {
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stderr.writefln!"Error parsing properties from %s: %s"(propsFile, e.msg);
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throw e;
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}
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}).array;
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}
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private string findSystemDServiceName(string serverDir) {
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foreach (DirEntry entry; dirEntries(serverDir, SpanMode.shallow, false)) {
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if (entry.name.endsWith(".service")) {
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return baseName(stripExtension(entry.name));
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}
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}
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throw new Exception("No SystemD service file found in " ~ serverDir);
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}
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