Improves configuration handling and stuff

src/main/java/net/knarcraft/ffmpegconverter/utility/ConfigHelper.java

@@ -0,0 +1,60 @@
+package net.knarcraft.ffmpegconverter.utility;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A helper class for dealing with configuration value types
+ */
+public final class ConfigHelper {
+
+    private ConfigHelper() {
+
+    }
+
+    /**
+     * Gets the given value as a string list
+     *
+     * @param value <p>The raw string list value</p>
+     * @return <p>The value as a string list, or null if not compatible</p>
+     */
+    public static @NotNull List<String> asStringList(@Nullable Object value) {
+        if (value == null) {
+            return new ArrayList<>();
+        }
+        if (value instanceof String string) {
+            return List.of((string).split(","));
+        } else if (value instanceof List<?> list) {
+            List<String> strings = new ArrayList<>();
+            for (Object object : list) {
+                strings.add(String.valueOf(object));
+            }
+            return strings;
+        } else {
+            return new ArrayList<>();
+        }
+    }
+
+    /**
+     * Gets the given value as a boolean
+     *
+     * <p>This will throw an exception if used for a non-boolean value</p>
+     *
+     * @param value <p>The object value to get</p>
+     * @return <p>The value of the given object as a boolean</p>
+     * @throws ClassCastException <p>If the given value is not a boolean</p>
+     */
+    public static boolean asBoolean(@Nullable Object value) throws ClassCastException {
+        if (value instanceof Boolean booleanValue) {
+            return booleanValue;
+        } else if (value instanceof String) {
+            return Boolean.parseBoolean((String) value);
+        } else {
+            throw new ClassCastException();
+        }
+    }
+
+}