Minor tweaks to GenericConfig & ContextProvider

# Changes:
- Changed Configuration#getList(String, Class) to Configuration#getCollection(String, Class)

- Renamed GenericConfiguration -> GenericConfig

- Implemented semantics for GenericConfig#getCollection and GenericConfig#getStringList

- Adjusted return value of ContextProvider#fromString to return Optional<T> instead of @Nullable T

- Adjusted classes which used previous API methods to use the newly updated ones.

Patchwork/src/main/java/fns/patchwork/command/BukkitDelegate.java

@@ -32,6 +32,7 @@ import fns.patchwork.utils.logging.FNS4J;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Optional;
 import java.util.Set;
 import net.kyori.adventure.text.Component;
 import org.bukkit.Bukkit;
@@ -156,50 +157,19 @@ public final class BukkitDelegate extends Command implements PluginIdentifiableC
         if (argTypes.length > args.length)
             return;
 
+        final Player p = (sender instanceof Player player) ? player : null;
+
         final Object[] objects = new Object[argTypes.length + 1];
 
-        for (int i = 0; i < argTypes.length; i++)
-        {
-            final Class<?> argType = argTypes[i];
-            final String arg = args[i];
+        parseArguments(args, provider, argTypes, objects);
 
-            if (argType.equals(String.class))
-            {
-                if (i == argTypes.length - 1)
-                {
-                    final String[] reasonArgs = Arrays.copyOfRange(args, i, args.length - 1);
-                    final String reason = String.join(" ", reasonArgs);
-                    objects[i] = reason;
-                }
-                else
-                {
-                    continue;
-                }
-            }
-
-            if (argType.equals(Location.class))
-            {
-                final String[] locationArgs = Arrays.copyOfRange(args, i, i + 3);
-                final String location = String.join(" ", locationArgs);
-                objects[i] = location;
-            }
-
-            final Object obj = provider.fromString(arg, argType);
-            if (obj == null)
-            {
-                FNS4J.getLogger("Datura")
-                     .error("Failed to parse argument " + arg + " for type " + argType.getName());
-                return;
-            }
-            objects[i] = obj;
-        }
         try
         {
             if (noConsole)
             {
                 command.getSubcommands()
                        .get(node)
-                       .invoke(command, (Player) sender, objects);
+                       .invoke(command, p, objects);
             }
             else
             {
@@ -215,11 +185,55 @@ public final class BukkitDelegate extends Command implements PluginIdentifiableC
         }
     }
 
-    @Override
-    public List<String> tabComplete(final CommandSender sender, final String alias, final String[] args)
+    private void parseArguments(@NotNull String @NotNull [] args,
+                                ContextProvider provider,
+                                Class<?>[] argTypes,
+                                Object[] objects)
+    {
+        for (int i = 0; i < argTypes.length; i++)
+        {
+            final Class<?> argType = argTypes[i];
+            String arg = args[i];
+
+            boolean wasResolved = false;
+
+            if (argType.equals(String.class) && (i == argTypes.length - 1))
+            {
+                final String[] reasonArgs = Arrays.copyOfRange(args, i, args.length - 1);
+                final String reason = String.join(" ", reasonArgs);
+                objects[i] = reason;
+                wasResolved = true;
+            }
+
+            if (argType.equals(Location.class))
+            {
+                final String[] locationArgs = Arrays.copyOfRange(args, i, i + 3);
+                arg = String.join(" ", locationArgs);
+            }
+
+            if (!wasResolved)
+            {
+                final Optional<?> obj = provider.fromString(arg, argType);
+                if (obj.isEmpty())
+                {
+                    FNS4J.getLogger("Datura")
+                         .error("Failed to parse argument " + arg + " for type " + argType.getName());
+                    continue;
+                }
+                objects[i] = obj.get();
+            }
+        }
+    }
+
+    @Override
+    public @NotNull List<String> tabComplete(final @NotNull CommandSender sender, final @NotNull String alias,
+                                             final String[] args)
     {
-        final Set<Completion> completions = command.getCompletions();
         final List<String> results = new ArrayList<>();
+        final Set<Completion> completions = command.getCompletions();
+
+        if (completions == null || completions.isEmpty())
+            return results;
 
         if (args.length == 0)
         {

Patchwork/src/main/java/fns/patchwork/config/Configuration.java

@@ -25,6 +25,7 @@ package fns.patchwork.config;
 
 import fns.patchwork.provider.Context;
 import fns.patchwork.provider.ContextProvider;
+import java.util.Collection;
 import org.jetbrains.annotations.Unmodifiable;
 
 import java.io.File;
@@ -87,7 +88,7 @@ public interface Configuration
      * @param clazz The class of the type.
      * @return The List object.
      */
-    <T> @Unmodifiable List<T> getList(String path, Class<T> clazz);
+    <T> @Unmodifiable Collection<T> getCollection(String path, Class<T> clazz);
 
     /**
      * Gets a List object from the associated path. The List that is returned will be the String values which are stored

Patchwork/src/main/java/fns/patchwork/config/GenericConfig.java

@@ -26,7 +26,9 @@ package fns.patchwork.config;
 import com.electronwill.nightconfig.core.Config;
 import com.electronwill.nightconfig.core.ConfigFormat;
 import com.electronwill.nightconfig.core.UnmodifiableConfig;
+import fns.patchwork.provider.ContextProvider;
 import fns.patchwork.utils.FileUtils;
+import fns.patchwork.utils.logging.FNS4J;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileReader;
@@ -34,22 +36,24 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 import org.bukkit.plugin.java.JavaPlugin;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.Unmodifiable;
 
-public final class GenericConfiguration implements Configuration
+public final class GenericConfig implements Configuration
 {
+    private static final ContextProvider PROVIDER = new ContextProvider();
     private final File configFile;
     private final String fileName;
     private final Config config;
     private final ConfigType configType;
 
-    public GenericConfiguration(@NotNull final ConfigType configType,
+    public GenericConfig(@NotNull final ConfigType configType,
                          @Nullable final JavaPlugin plugin,
                          @NotNull final File dataFolder,
                          @NotNull final String fileName,
@@ -78,19 +82,19 @@ public final class GenericConfiguration implements Configuration
         this.load();
     }
 
-    public GenericConfiguration(final ConfigType type, final File dataFolder, final String fileName)
+    public GenericConfig(final ConfigType type, final File dataFolder, final String fileName)
         throws IOException
     {
         this(type, null, dataFolder, fileName, false);
     }
 
-    public GenericConfiguration(final ConfigType type, final JavaPlugin plugin, final String fileName)
+    public GenericConfig(final ConfigType type, final JavaPlugin plugin, final String fileName)
         throws IOException
     {
         this(type, plugin, plugin.getDataFolder(), fileName, false);
     }
 
-    public GenericConfiguration(final ConfigType type, final File dataFolder, final String fileName,
+    public GenericConfig(final ConfigType type, final File dataFolder, final String fileName,
                          final boolean isConcurrent)
         throws IOException
     {
@@ -114,8 +118,10 @@ public final class GenericConfiguration implements Configuration
     }
 
     @Override
-    public void load() throws IOException {
-        try (final FileReader reader = new FileReader(this.configFile)) {
+    public void load() throws IOException
+    {
+        try (final FileReader reader = new FileReader(this.configFile))
+        {
             this.config.clear();
 
             final UnmodifiableConfig parsed = this.configType.getParser().parse(reader).unmodifiable();
@@ -145,7 +151,7 @@ public final class GenericConfiguration implements Configuration
     }
 
     @Override
-    public boolean getBoolean(String path)
+    public boolean getBoolean(final String path)
     {
         if (!(this.getConfig().get(path) instanceof Boolean))
             throw new IllegalArgumentException(String.format("Value at path %s is not a boolean!", path));
@@ -153,22 +159,70 @@ public final class GenericConfiguration implements Configuration
         return this.getConfig().get(path);
     }
 
-    @Override
-    @ApiStatus.Internal
-    public @Unmodifiable <T> List<T> getList(String path, Class<T> clazz)
-    {
-        // TODO: Figure out how to parse lists with Night Config.
 
-        return new ArrayList<>();
+    /*
+     * I am pretty sure that this works, but not really.
+     * This is sort of a shot in the dark because Night Config did specify that they support collections
+     * in TOML and JSON files, but there is no specific get method for objects that are not primitives.
+     * Additionally, not all primitives are natively supported.
+     */
+    @Override
+    public @Unmodifiable <T> Collection<T> getCollection(String path, Class<T> clazz)
+    {
+        if (!(this.getConfig().get(path) instanceof Collection<?>))
+            throw new IllegalArgumentException(String.format("Value at path %s is not a collection!", path));
+
+        final Collection<?> collection = this.getConfig().get(path);
+        final Collection<T> collected = new ArrayList<>();
+
+        collection.stream()
+                  .map(obj ->
+                       {
+                           final Optional<T> optional;
+
+                           if (obj instanceof String string)
+                               optional = PROVIDER.fromString(string, clazz);
+                           else if (clazz.isInstance(obj))
+                               optional = Optional.of(clazz.cast(obj));
+                           else
+                               optional = Optional.empty();
+
+                           return optional;
+                       })
+                  .filter(Optional::isPresent)
+                  .map(Optional::get)
+                  .collect(Collectors.toCollection(() -> collected));
+
+        return collected;
     }
 
+    /*
+     * I am pretty sure that this works, but not really.
+     * This is sort of a shot in the dark because Night Config did specify that they support collections
+     * in TOML and JSON files, but there is no specific get method for objects that are not primitives.
+     * Additionally, not all primitives are natively supported.
+     */
     @Override
-    @ApiStatus.Internal
     public @Unmodifiable List<String> getStringList(String path)
     {
-        // TODO: Figure out how to parse lists with Night Config.
+        if (!(this.getConfig().get(path) instanceof Collection<?> c))
+            throw new IllegalArgumentException(String.format("Value at path %s is not a collection!", path));
 
-        return new ArrayList<>();
+        final Collection<?> collection = this.getConfig().get(path);
+        final List<String> list = new ArrayList<>();
+
+        if (c.isEmpty() || !(c.toArray()[0] instanceof String))
+        {
+            FNS4J.PATCHWORK.warn(String.format("Collection at path %s is empty or does not contain strings!", path));
+            FNS4J.PATCHWORK.warn("Returning empty list!");
+            return list;
+        }
+
+        collection.stream()
+                  .map(String.class::cast)
+                  .collect(Collectors.toCollection(() -> list));
+
+        return list;
     }
 
     @Override
@@ -195,20 +249,22 @@ public final class GenericConfiguration implements Configuration
     @Override
     public <T> Optional<T> get(String path, Class<T> clazz)
     {
-        // I love ternary statements, sorry Allink :)
-        return clazz.isInstance(this.getConfig().get(path)) ?
-            Optional.of(clazz.cast(this.getConfig().get(path))) :
-            Optional.empty();
+        return this.getConfig()
+                   .getOptional(path)
+                   .filter(clazz::isInstance)
+                   .map(clazz::cast);
     }
 
     @Override
     public <T> T getOrDefault(String path, Class<T> clazz, T fallback)
     {
-        return this.get(path, clazz).orElse(fallback);
+        return this.get(path, clazz)
+                   .orElse(fallback);
     }
 
     @Override
-    public <T> void set(final String path, final T value) {
+    public <T> void set(final String path, final T value)
+    {
         this.config.set(path, value);
     }
 

Patchwork/src/main/java/fns/patchwork/config/WrappedBukkitConfiguration.java

@@ -94,7 +94,7 @@ public final class WrappedBukkitConfiguration implements Configuration
     }
 
     @Override
-    public <T> List<T> getList(String path, Class<T> clazz)
+    public <T> List<T> getCollection(String path, Class<T> clazz)
     {
         return this.contextProvider.getList(this.getStringList(path), clazz);
     }
@@ -132,7 +132,7 @@ public final class WrappedBukkitConfiguration implements Configuration
     @Override
     public <T> Optional<T> get(String path, Class<T> clazz)
     {
-        return Optional.ofNullable(this.contextProvider.fromString(path, clazz));
+        return this.contextProvider.fromString(path, clazz);
     }
 
     @Override

Patchwork/src/main/java/fns/patchwork/provider/ContextProvider.java

@@ -26,6 +26,7 @@ package fns.patchwork.provider;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.stream.Stream;
 import net.kyori.adventure.text.Component;
 import org.bukkit.Bukkit;
@@ -60,7 +61,7 @@ import org.jetbrains.annotations.Nullable;
  */
 public class ContextProvider
 {
-    public <T> T fromString(final String string, final Class<T> clazz)
+    public <T> Optional<T> fromString(final String string, final Class<T> clazz)
     {
         return Stream.of(toBoolean(string, clazz),
                          toLong(string, clazz),
@@ -74,9 +75,9 @@ public class ContextProvider
                          toLocation(string, clazz),
                          toComponent(string, clazz))
                      .filter(Objects::nonNull)
-                     .findFirst()
+                     .filter(clazz::isInstance)
                      .map(clazz::cast)
-                     .orElse(null);
+                     .findFirst();
     }
 
     private @Nullable Boolean toBoolean(final String string, final Class<?> clazz)
@@ -227,10 +228,9 @@ public class ContextProvider
     public @NotNull <T> List<@Nullable T> getList(final List<String> resolvable, final Class<T> clazz)
     {
         final List<T> resolved = new ArrayList<>();
-        for (final String entry : resolvable)
-        {
-            resolved.add(this.fromString(entry, clazz));
-        }
+
+        resolvable.forEach(entry -> this.fromString(entry, clazz).ifPresent(resolved::add));
+
         return resolved;
     }
 }

Veritas/src/main/java/fns/veritas/Aggregate.java

@@ -28,6 +28,7 @@ import fns.veritas.bukkit.BukkitNative;
 import fns.veritas.bukkit.ServerListener;
 import fns.veritas.client.BotClient;
 import fns.veritas.client.BotConfig;
+import java.io.IOException;
 import org.bukkit.Bukkit;
 
 public class Aggregate
@@ -40,13 +41,30 @@ public class Aggregate
 
     public Aggregate(final Veritas plugin)
     {
+        BotClient bot1;
         this.plugin = plugin;
-        this.bot = new BotClient(new BotConfig(plugin));
+
+        try
+        {
+            bot1 = new BotClient(new BotConfig(plugin));
+        }
+        catch (IOException ex)
+        {
+            getLogger().error("Failed to load bot config! Shutting down...");
+            getLogger().error(ex);
+            this.bot = null;
+            this.serverListener = null;
+            this.bukkitNativeListener = null;
+            Bukkit.getPluginManager().disablePlugin(plugin);
+            return;
+        }
+
         this.bukkitNativeListener = new BukkitNative(plugin);
         this.serverListener = new ServerListener(plugin);
 
         Bukkit.getServer().getPluginManager().registerEvents(this.getBukkitNativeListener(), plugin);
         this.getServerListener().minecraftChatBound().subscribe();
+        this.bot = bot1;
     }
 
     public static FNS4J getLogger()

Veritas/src/main/java/fns/veritas/client/BotConfig.java

@@ -24,7 +24,8 @@
 package fns.veritas.client;
 
 import discord4j.common.util.Snowflake;
-import fns.patchwork.config.WrappedBukkitConfiguration;
+import fns.patchwork.config.ConfigType;
+import fns.patchwork.config.GenericConfig;
 import fns.veritas.Aggregate;
 import fns.veritas.Veritas;
 import java.io.File;
@@ -41,12 +42,11 @@ public class BotConfig
     public static final String GUILD_ID = "guild_id";
     @NonNls
     private static final String BOT_TOKEN = "bot_token";
-    private final WrappedBukkitConfiguration config;
+    private final GenericConfig config;
 
-    public BotConfig(final Veritas plugin)
+    public BotConfig(final Veritas plugin) throws IOException
     {
-        this.config = new WrappedBukkitConfiguration(f0(plugin),
-                                                     new File(plugin.getDataFolder(), "config.yml"));
+        this.config = new GenericConfig(ConfigType.TOML, plugin, "config.toml");
     }
 
     public String getToken()