Allows the list join delimiter in FormatBuilder to be customized in some cases

src/main/java/net/knarcraft/knarlib/formatting/FormatBuilder.java

@@ -97,6 +97,8 @@ public final class FormatBuilder {
 
     /**
      * Replaces placeholders for the current string
+     * 
+     * <p>If the placeholder or replacement is a list, it will be joined using the default delimiter: ",".</p>
      *
      * @param placeholder <p>The placeholder to replace</p>
      * @param replacement <p>The replacement</p>
@@ -106,7 +108,26 @@ public final class FormatBuilder {
      */
     @NotNull
     public <K, L> FormatBuilder replace(@NotNull K placeholder, @NotNull L replacement) throws IllegalStateException {
-        this.toFormat = StringFormatter.replacePlaceholder(this.toFormat, asString(placeholder), asString(replacement));
+        this.toFormat = StringFormatter.replacePlaceholder(this.toFormat, asString(placeholder, LIST_DELIMITER),
+                asString(replacement, LIST_DELIMITER));
+        return this;
+    }
+
+    /**
+     * Replaces placeholders for the current string
+     *
+     * @param placeholder <p>The placeholder to replace</p>
+     * @param replacement <p>The replacement</p>
+     * @param delimiter <p>The delimiter used for joining if the replacement is some kind of list</p>
+     * @return <p>This format builder</p>
+     * @throws IllegalStateException <p>If the string formatter has not been set, and the placeholder or replacement is
+     *                               a translatable message</p>
+     */
+    @NotNull
+    public <K, L> FormatBuilder replace(@NotNull K placeholder, @NotNull L replacement,
+                                        @NotNull String delimiter) throws IllegalStateException {
+        this.toFormat = StringFormatter.replacePlaceholder(this.toFormat, asString(placeholder, LIST_DELIMITER), 
+                asString(replacement, delimiter));
         return this;
     }
 
@@ -157,13 +178,29 @@ public final class FormatBuilder {
     /**
      * Appends the given string to this format builder
      *
+     * <p>If the input is a list, it will be joined using the default delimiter: ",".</p>
+     * 
      * @param input <p>The input to append</p>
      * @return <p>This format builder</p>
      * @throws IllegalStateException <p>If the string formatter has not been set, and the input is a translatable message</p>
      */
     @NotNull
     public <K> FormatBuilder append(@NotNull K input) throws IllegalStateException {
-        this.toFormat += asString(input);
+        this.toFormat += asString(input, LIST_DELIMITER);
+        return this;
+    }
+
+    /**
+     * Appends the given string to this format builder
+     *
+     * @param input <p>The input to append</p>
+     * @param delimiter <p>The delimiter used for joining if the input is some kind of list</p>
+     * @return <p>This format builder</p>
+     * @throws IllegalStateException <p>If the string formatter has not been set, and the input is a translatable message</p>
+     */
+    @NotNull
+    public <K> FormatBuilder append(@NotNull K input, @NotNull String delimiter) throws IllegalStateException {
+        this.toFormat += asString(input, delimiter);
         return this;
     }
 
@@ -216,11 +253,12 @@ public final class FormatBuilder {
      * Converts the given input to a string
      *
      * @param input <p>The input to convert</p>
+     * @param delimiter <p>The delimiter to use if the input is some kind of list</p>
      * @return <p>The corresponding string</p>
      * @throws IllegalStateException <p>If the string formatter has not been set, and the input is a translatable message.</p>
      */
     @NotNull
-    private <K> String asString(@NotNull K input) {
+    private <K> String asString(@NotNull K input, @NotNull String delimiter) {
         if (input instanceof String string) {
             return string;
         } else if (input instanceof TranslatableMessage translatableMessage) {
@@ -237,14 +275,14 @@ public final class FormatBuilder {
             for (Object item : collection) {
                 output.add(String.valueOf(item));
             }
-            return String.join(LIST_DELIMITER, output);
+            return String.join(delimiter, output);
         } else if (input.getClass().isArray()) {
             int length = Array.getLength(input);
             List<String> output = new ArrayList<>(length);
             for (int i = 0; i < length; i++) {
                 output.add(String.valueOf(Array.get(input, i)));
             }
-            return String.join(LIST_DELIMITER, output);
+            return String.join(delimiter, output);
         }
         return String.valueOf(input);
     }