From 085786273ba143aed76e683ddf290686d92e0991 Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Sun, 30 Jun 2019 14:19:35 +0200
Subject: [PATCH] Add EmptyFormFieldDependency

See #2509
---
 .../templates/__emptyFormFieldDependency.tpl  |  7 +++
 syncTemplates.json                            |  1 +
 .../templates/__emptyFormFieldDependency.tpl  |  7 +++
 .../Form/Builder/Field/Dependency/Empty.js    | 55 +++++++++++++++++++
 .../EmptyFormFieldDependency.class.php        | 25 +++++++++
 5 files changed, 95 insertions(+)
 create mode 100644 com.woltlab.wcf/templates/__emptyFormFieldDependency.tpl
 create mode 100644 wcfsetup/install/files/acp/templates/__emptyFormFieldDependency.tpl
 create mode 100644 wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty.js
 create mode 100644 wcfsetup/install/files/lib/system/form/builder/field/dependency/EmptyFormFieldDependency.class.php

diff --git a/com.woltlab.wcf/templates/__emptyFormFieldDependency.tpl b/com.woltlab.wcf/templates/__emptyFormFieldDependency.tpl
new file mode 100644
index 0000000000..0975ecbe58
--- /dev/null
+++ b/com.woltlab.wcf/templates/__emptyFormFieldDependency.tpl
@@ -0,0 +1,7 @@
+require(['WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty'], function(EmptyFieldDependency) {
+	// dependency '{@$dependency->getId()}'
+	new EmptyFieldDependency(
+		'{@$dependency->getDependentNode()->getPrefixedId()}Container',
+		'{@$dependency->getField()->getPrefixedId()}'
+	);
+});
diff --git a/syncTemplates.json b/syncTemplates.json
index 75370394fb..b236044664 100644
--- a/syncTemplates.json
+++ b/syncTemplates.json
@@ -8,6 +8,7 @@
     "__booleanFormField",
     "__contentLanguageFormField",
     "__dateFormField",
+    "__emptyFormFieldDependency",
     "__form",
     "__formButton",
     "__formContainer",
diff --git a/wcfsetup/install/files/acp/templates/__emptyFormFieldDependency.tpl b/wcfsetup/install/files/acp/templates/__emptyFormFieldDependency.tpl
new file mode 100644
index 0000000000..0975ecbe58
--- /dev/null
+++ b/wcfsetup/install/files/acp/templates/__emptyFormFieldDependency.tpl
@@ -0,0 +1,7 @@
+require(['WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty'], function(EmptyFieldDependency) {
+	// dependency '{@$dependency->getId()}'
+	new EmptyFieldDependency(
+		'{@$dependency->getDependentNode()->getPrefixedId()}Container',
+		'{@$dependency->getField()->getPrefixedId()}'
+	);
+});
diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty.js b/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty.js
new file mode 100644
index 0000000000..d14b1ca29b
--- /dev/null
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty.js
@@ -0,0 +1,55 @@
+/**
+ * Form field dependency implementation that requires the value of a field to be empty.
+ *
+ * @author	Matthias Schmidt
+ * @copyright	2001-2019 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @module	WoltLabSuite/Core/Form/Builder/Field/Dependency/Empty
+ * @see 	module:WoltLabSuite/Core/Form/Builder/Field/Dependency/Abstract
+ * @since	5.2
+ */
+define(['./Abstract', 'Core'], function(Abstract, Core) {
+	"use strict";
+	
+	/**
+	 * @constructor
+	 */
+	function Empty(dependentElementId, fieldId) {
+		this.init(dependentElementId, fieldId);
+	};
+	Core.inherit(Empty, Abstract, {
+		/**
+		 * @see	WoltLabSuite/Core/Form/Builder/Field/Dependency/Abstract#checkDependency
+		 */
+		checkDependency: function() {
+			switch (this._field.tagName) {
+				case 'INPUT':
+					switch (this._field.type) {
+						case 'checkbox':
+							// TODO: check if working
+							return !this._field.checked;
+						
+						case 'radio':
+							if (this._noField && this._noField.checked) {
+								return true;
+							}
+							
+							return !this._field.checked;
+						
+						default:
+							return this._field.value.trim().length === 0;
+					}
+				
+				case 'SELECT':
+					// TODO: check if working for multiselect
+					return this._field.value.length === 0;
+				
+				case 'TEXTAREA':
+					// TODO: check if working
+					return this._field.value.trim().length === 0;
+			}
+		}
+	});
+	
+	return Empty;
+});
diff --git a/wcfsetup/install/files/lib/system/form/builder/field/dependency/EmptyFormFieldDependency.class.php b/wcfsetup/install/files/lib/system/form/builder/field/dependency/EmptyFormFieldDependency.class.php
new file mode 100644
index 0000000000..aa10be2b3e
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/form/builder/field/dependency/EmptyFormFieldDependency.class.php
@@ -0,0 +1,25 @@
+<?php
+namespace wcf\system\form\builder\field\dependency;
+
+/**
+ * Represents a dependency that requires the value of a field is empty.
+ * 
+ * @author	Matthias Schmidt
+ * @copyright	2001-2019 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package	WoltLabSuite\Core\System\Form\Builder\Field\Dependency
+ * @since	5.2
+ */
+class EmptyFormFieldDependency extends AbstractFormFieldDependency {
+	/**
+	 * @inheritDoc
+	 */
+	protected $templateName = '__emptyFormFieldDependency';
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function checkDependency() {
+		return empty($this->getField()->getValue());
+	}
+}
-- 
2.20.1