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includes/Services/Forms/Handlers/RsvFormElementHandler.php

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+<?php
+
+
+interface RsvFormElementHandler {
+    function draw(RsvFormElementDefinition $def) : void;
+
+    /**
+     * Validate and execute the element. Records errors on $result and returns
+     * false if it cannot complete.
+     *
+     * @param array<int,mixed> $data
+     */
+    function submit(RsvFormElementDefinition $def, int $submit_id, array $data, RsvFormSubmitResult $result) : bool;
+
+    /**
+     * Undo a successful submit(); a no-op for elements without side effects.
+     *
+     * @param array<int,mixed> $data
+     */
+    function rollback(RsvFormElementDefinition $def, int $submit_id, array $data, RsvFormSubmitResult $result) : void;
+}