feat: created main, and implemented log-level setting and config loading

Server/src/main/java/uulm/teamname/marvelous/server/Server.java

@@ -1,7 +1,146 @@
 package uulm.teamname.marvelous.server;
 
+import com.beust.jcommander.JCommander;
+import org.tinylog.Logger;
+import org.tinylog.configuration.Configuration;
+import uulm.teamname.marvelous.gamelibrary.config.CharacterConfig;
+import uulm.teamname.marvelous.gamelibrary.config.PartyConfig;
+import uulm.teamname.marvelous.gamelibrary.config.ScenarioConfig;
+import uulm.teamname.marvelous.gamelibrary.json.JSON;
+import uulm.teamname.marvelous.server.args.ServerArgs;
+import uulm.teamname.marvelous.server.netconnector.MarvelousServer;
+
+import java.io.*;
+import java.net.InetSocketAddress;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+
 public class Server {
+
     public static void main(String[] args) {
-        System.out.println("There's nothing here yet. Sucks for you!");
+
+        ServerArgs serverArgs = new ServerArgs();
+
+        JCommander.newBuilder()
+                .addObject(serverArgs)
+                .build()
+                .parse(args);
+
+        System.out.println(serverArgs);
+
+        if (serverArgs.isVerbose()) {
+            setLogLevel(5);
+        } else {
+            setLogLevel(serverArgs.getLogLevel());
+        }
+
+
+        ScenarioConfig scenarioConfig = readScenarioConfig(serverArgs.getScenarioConfigFile());
+        CharacterConfig characterConfig = readCharacterConfig(serverArgs.getCharacterConfigFile());
+        PartyConfig partyConfig = readPartyConfig(serverArgs.getMatchConfigFile());
+
+        InetSocketAddress address = new InetSocketAddress(serverArgs.getPort());
+        Logger.trace("Inet address {} created", address);
+
+
+
+    }
+
+    /** Function that sets the log level for {@link Logger Tinylog}.
+     * It has to be executed <b>BEFORE ANY LOGGING OPERATIONS</b> .
+     */
+    private static void setLogLevel(int logLevel) {
+        // System.out.println("setting log level to " + logLevel);
+        Map<String, String> map = new HashMap<>();
+
+        Configuration.replace(map);
+
+        String logLevelDescriptor = switch (logLevel) {
+            case 0  -> "off";
+            case 1  -> "error";
+            case 2  -> "warn";
+            case 3  -> "info";
+            case 4  -> "debug";
+            case 5  -> "trace";
+            default -> "info";
+        };
+
+        // Add log writer 1, a console writer (which logs to the console)
+        map.put("writer1", "console");
+        map.put("writer1.level", logLevelDescriptor);
+
+
+        // Add log writer 2, a file writer logging to the file server.log
+        map.put("writer2", "file");
+        map.put("writer2.level", logLevelDescriptor);
+        map.put("writer2.file", "./logs/server.log");
+
+        Configuration.replace(map);
+
+        Logger.info("Log level set to '" + logLevelDescriptor + "'");
+    }
+
+    private static ScenarioConfig readScenarioConfig(File source) {
+
+        if (!source.exists()) {
+            Logger.error("Scenario Configuration file not found. Exiting...");
+            System.exit(1);
+        }
+        var config = JSON.parseScenarioConfig(source);
+        if (config.isEmpty()) {
+            Logger.error("Scenario Configuration couldn't be parsed. Exiting...");
+            System.exit(1);
+        }
+
+        // TODO: Check whether Scenario Config is valid
+
+        Logger.info("Scenario Config file loaded");
+
+        return config.get();
+    }
+
+
+    private static CharacterConfig readCharacterConfig(File source) {
+
+        if (!source.exists()) {
+            Logger.error("Character Configuration file not found. Exiting...");
+            System.exit(1);
+        }
+        var config = JSON.parseCharacterConfig(source);
+        if (config.isEmpty()) {
+            Logger.error("Character Configuration couldn't be parsed. Exiting...");
+            System.exit(1);
+        }
+
+
+        // TODO: Check whether Character Config is valid
+
+        Logger.info("Character Config file loaded");
+
+        return config.get();
+    }
+
+
+    private static PartyConfig readPartyConfig(File source) {
+
+        if (!source.exists()) {
+            Logger.error("Party Configuration file not found. Exiting...");
+            System.exit(1);
+        }
+        var config = JSON.parsePartyConfig(source);
+        if (config.isEmpty()) {
+            Logger.error("Party Configuration couldn't be parsed. Exiting...");
+            System.exit(1);
+        }
+
+        // TODO: Check whether Party Config is valid
+
+        Logger.info("Party Config file loaded");
+
+        return config.get();
     }
 }