Add basic skeleton for the bot

src/main/java/tk/sciwhiz12/janitor/JanitorBot.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2021 SciWhiz12
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * Copyright (c) 2021 SciWhiz12
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package tk.sciwhiz12.janitor;
+
+import net.dv8tion.jda.api.JDA;
+import net.dv8tion.jda.api.JDABuilder;
+import net.dv8tion.jda.api.OnlineStatus;
+import net.dv8tion.jda.api.events.ReadyEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import net.dv8tion.jda.api.requests.GatewayIntent;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import tk.sciwhiz12.janitor.bot.BotOptions;
+
+import javax.security.auth.login.LoginException;
+import java.time.OffsetDateTime;
+import java.util.EnumSet;
+import java.util.Objects;
+
+public class JanitorBot extends ListenerAdapter {
+    public static final Logger LOGGER = LoggerFactory.getLogger(JanitorBot.class);
+    // TODO: fine-tune the gateway intents
+    private static final EnumSet<GatewayIntent> GATEWAY_INTENTS = EnumSet.allOf(GatewayIntent.class);
+
+    private static final String version = Objects.requireNonNullElse(JanitorBot.class.getPackage().getImplementationVersion(), "DEVELOPMENT-" + OffsetDateTime.now().toString());
+
+    private final BotOptions options;
+    private final JDA jda;
+
+    public JanitorBot(BotOptions options) throws LoginException {
+        LOGGER.info("Starting up Janitor v{}", version);
+
+        this.options = options;
+        final String token = options.getToken().orElseThrow(() -> new IllegalArgumentException("Bot token not found. Supply via config file or CLI option"));
+
+        this.jda = JDABuilder.createDefault(token, GATEWAY_INTENTS)
+                .setStatus(OnlineStatus.DO_NOT_DISTURB)
+                .addEventListeners(this)
+                .build();
+    }
+
+    @Override
+    public void onReady(@NotNull ReadyEvent event) {
+        LOGGER.info("Connection is ready");
+        jda.getPresence().setPresence(OnlineStatus.ONLINE, null);
+    }
+
+    public BotOptions getOptions() {
+        return options;
+    }
+
+    public JDA getJda() {
+        return jda;
+    }
+}

src/main/java/tk/sciwhiz12/janitor/bot/BotOptions.java

@@ -40,7 +40,28 @@
  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-package tk.sciwhiz12.janitor.bot.config;
+/*
+ * Copyright (c) 2021 SciWhiz12
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package tk.sciwhiz12.janitor.bot;
 
 import it.unimi.dsi.fastutil.longs.LongSet;
 

src/main/java/tk/sciwhiz12/janitor/bot/BotStartup.java

@@ -42,20 +42,35 @@
 
 package tk.sciwhiz12.janitor.bot;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import tk.sciwhiz12.janitor.JanitorBot;
 import tk.sciwhiz12.janitor.bot.config.BotFileConfig;
-import tk.sciwhiz12.janitor.bot.config.BotOptions;
 import tk.sciwhiz12.janitor.bot.config.CommandLineBotOptions;
 import tk.sciwhiz12.janitor.bot.config.MergedBotOptions;
 
+import javax.security.auth.login.LoginException;
 import java.nio.file.Path;
 
 public class BotStartup {
-    public static void main(String[] args) {
+    private static final Logger LOGGER = LoggerFactory.getLogger(BotStartup.class);
+
+    public static void main(String[] args) throws LoginException {
+        LOGGER.info("Parsing command line options");
         CommandLineBotOptions cmdLine = new CommandLineBotOptions(args);
         Path configFile = cmdLine.getConfigFile();
+        LOGGER.info("Loading config file from {}", configFile.toAbsolutePath());
         BotFileConfig fileConfig = new BotFileConfig(configFile);
 
         BotOptions options = new MergedBotOptions(fileConfig, cmdLine);
+
+        if (options.getToken().isEmpty()) {
+            LOGGER.warn("No bot token found.");
+            LOGGER.warn("Please specify a bot token using the config file or the CLI option.");
+            return;
+        }
+
+        new JanitorBot(options);
     }
 
 }

src/main/java/tk/sciwhiz12/janitor/bot/config/BotFileConfig.java

@@ -67,15 +67,13 @@ import com.electronwill.nightconfig.core.file.CommentedFileConfig;
 import com.google.common.primitives.Longs;
 import it.unimi.dsi.fastutil.longs.LongArraySet;
 import it.unimi.dsi.fastutil.longs.LongSet;
+import tk.sciwhiz12.janitor.bot.BotOptions;
 
 import java.nio.file.Path;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-/**
- * File-backed bot configuration.
- */
 public class BotFileConfig implements BotOptions {
     private final CommentedFileConfig config;
 

src/main/java/tk/sciwhiz12/janitor/bot/config/CommandLineBotOptions.java

@@ -50,6 +50,7 @@ import joptsimple.OptionParser;
 import joptsimple.OptionSet;
 import joptsimple.util.PathConverter;
 import joptsimple.util.PathProperties;
+import tk.sciwhiz12.janitor.bot.BotOptions;
 
 import javax.annotation.Nullable;
 import java.nio.file.Path;

src/main/java/tk/sciwhiz12/janitor/bot/config/MergedBotOptions.java

@@ -43,6 +43,7 @@
 package tk.sciwhiz12.janitor.bot.config;
 
 import it.unimi.dsi.fastutil.longs.LongSet;
+import tk.sciwhiz12.janitor.bot.BotOptions;
 
 import java.util.Optional;