Allow individual buttons to have a callback

Fixes #12

src/main/java/org/geysermc/cumulus/form/SimpleForm.java

@@ -1,30 +1,12 @@
 /*
- * Copyright (c) 2020-2023 GeyserMC
- *
- * 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.
- *
- * @author GeyserMC
+ * Copyright (c) 2020-2024 GeyserMC
+ * Licensed under the MIT license
  * @link https://github.com/GeyserMC/Cumulus
  */
 package org.geysermc.cumulus.form;
 
 import java.util.List;
+import java.util.function.Consumer;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
@@ -90,6 +72,15 @@ interface Builder extends FormBuilder<Builder, SimpleForm, SimpleFormResponse> {
      */
     @This Builder button(@NonNull ButtonComponent button);
 
+    /**
+     * Adds a button with callback directly to the form.
+     *
+     * @param button the button to add
+     * @param callback the handler when the button is clicked
+     * @return the form builder
+     */
+    @This Builder button(@NonNull ButtonComponent button, @NonNull Consumer<SimpleFormResponse> callback);
+
     /**
      * Adds a button with image to the Form.
      *
@@ -100,6 +91,21 @@ interface Builder extends FormBuilder<Builder, SimpleForm, SimpleFormResponse> {
      */
     @This Builder button(@NonNull String text, FormImage.@NonNull Type type, @NonNull String data);
 
+    /**
+     * Adds a button with image and callback to the Form.
+     *
+     * @param text text of the button
+     * @param type type of image
+     * @param data the data for the image type
+     * @param callback the handler when the button is clicked
+     * @return the form builder
+     */
+    @This Builder button(
+        @NonNull String text,
+        FormImage.@NonNull Type type,
+        @NonNull String data,
+        @NonNull Consumer<SimpleFormResponse> callback);
+
     /**
      * Adds a button with image to the Form.
      *
@@ -109,6 +115,19 @@ interface Builder extends FormBuilder<Builder, SimpleForm, SimpleFormResponse> {
      */
     @This Builder button(@NonNull String text, @Nullable FormImage image);
 
+    /**
+     * Adds a button with image and callback to the Form.
+     *
+     * @param text the text of the button
+     * @param image the image
+     * @param callback the handler when the button is clicked
+     * @return the form builder
+     */
+    @This Builder button(
+        @NonNull String text,
+        @Nullable FormImage image,
+        @NonNull Consumer<SimpleFormResponse> callback);
+
     /**
      * Adds a button to the Form.
      *
@@ -117,6 +136,15 @@ interface Builder extends FormBuilder<Builder, SimpleForm, SimpleFormResponse> {
      */
     @This Builder button(@NonNull String text);
 
+    /**
+     * Adds a button with callback to the Form.
+     *
+     * @param text the text of the button
+     * @param callback the handler when the button is clicked
+     * @return the form builder
+     */
+    @This Builder button(@NonNull String text, @NonNull Consumer<SimpleFormResponse> callback);
+
     /**
      * Adds a button with image to the Form, but only when shouldAdd is true.
      *

src/main/java/org/geysermc/cumulus/form/impl/FormImpl.java

@@ -187,7 +187,12 @@ public B resultHandler(
     @Override
     public abstract @NonNull F build();
 
-    protected void setResponseHandler(FormImpl<R> impl, F form) {
+    protected void setResponseHandler(@NonNull FormImpl<R> impl, @NonNull F form) {
+      setResponseHandler(impl, form, null);
+    }
+
+    protected void setResponseHandler(
+        @NonNull FormImpl<R> impl, @NonNull F form, @Nullable Consumer<R> validHandler) {
       impl.resultHandler(
           result -> {
             if (selectedResultHandler != null) {
@@ -217,6 +222,9 @@ protected void setResponseHandler(FormImpl<R> impl, F form) {
               if (validResultHandler != null) {
                 validResultHandler.accept(form, response);
               }
+              if (validHandler != null) {
+                validHandler.accept(response);
+              }
             }
           });
     }

src/main/java/org/geysermc/cumulus/form/impl/simple/SimpleFormImpl.java

@@ -1,35 +1,20 @@
 /*
- * Copyright (c) 2020-2023 GeyserMC
- *
- * 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.
- *
- * @author GeyserMC
+ * Copyright (c) 2020-2024 GeyserMC
+ * Licensed under the MIT license
  * @link https://github.com/GeyserMC/Cumulus
  */
 package org.geysermc.cumulus.form.impl.simple;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.function.Consumer;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.common.returnsreceiver.qual.This;
 import org.geysermc.cumulus.component.ButtonComponent;
 import org.geysermc.cumulus.form.SimpleForm;
 import org.geysermc.cumulus.form.impl.FormImpl;
@@ -62,6 +47,7 @@ public static final class Builder
       implements SimpleForm.Builder {
 
     private final List<ButtonComponent> buttons = new ArrayList<>();
+    private final Map<Integer, Consumer<SimpleFormResponse>> callbacks = new HashMap<>();
     private String content = "";
 
     @Override
@@ -76,25 +62,58 @@ public Builder button(@NonNull ButtonComponent button) {
       return this;
     }
 
+    @Override
+    public SimpleForm.@This Builder button(
+        @NonNull ButtonComponent button, @NonNull Consumer<SimpleFormResponse> callback) {
+      callbacks.put(buttons.size(), Objects.requireNonNull(callback));
+      return button(button);
+    }
+
     @Override
     public Builder button(
         @NonNull String text, FormImage.@NonNull Type type, @NonNull String data) {
       buttons.add(ButtonComponent.of(translate(text), type, data));
       return this;
     }
 
+    @Override
+    public SimpleForm.@This Builder button(
+        @NonNull String text,
+        FormImage.@NonNull Type type,
+        @NonNull String data,
+        @NonNull Consumer<SimpleFormResponse> callback) {
+      callbacks.put(buttons.size(), Objects.requireNonNull(callback));
+      return button(text, type, data);
+    }
+
     @Override
     public Builder button(@NonNull String text, @Nullable FormImage image) {
       buttons.add(ButtonComponent.of(translate(text), image));
       return this;
     }
 
+    @Override
+    public SimpleForm.@This Builder button(
+        @NonNull String text,
+        @Nullable FormImage image,
+        @NonNull Consumer<SimpleFormResponse> callback) {
+      callbacks.put(buttons.size(), Objects.requireNonNull(callback));
+      return button(text, image);
+    }
+
     @Override
     public Builder button(@NonNull String text) {
       buttons.add(ButtonComponent.of(translate(text)));
       return this;
     }
 
+    @Override
+    public SimpleForm.@This Builder button(
+        @NonNull String text, @NonNull Consumer<SimpleFormResponse> callback) {
+      callbacks.put(buttons.size(), Objects.requireNonNull(callback));
+      return button(text);
+    }
+
     @Override
     public Builder optionalButton(
         @NonNull String text,
@@ -127,7 +146,15 @@ public Builder optionalButton(@NonNull String text, boolean shouldAdd) {
     @Override
     public @NonNull SimpleForm build() {
       SimpleFormImpl form = new SimpleFormImpl(title, content, buttons);
-      setResponseHandler(form, form);
+      setResponseHandler(
+          form,
+          form,
+          valid -> {
+            Consumer<SimpleFormResponse> callback = callbacks.get(valid.clickedButtonId());
+            if (callback != null) {
+              callback.accept(valid);
+            }
+          });
       return form;
     }