SDK Form demonstrator

lib/symfony/form/ChoiceList/View/ChoiceGroupView.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\ChoiceList\View;
+
+/**
+ * Represents a group of choices in templates.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @implements \IteratorAggregate<array-key, ChoiceGroupView|ChoiceView>
+ */
+class ChoiceGroupView implements \IteratorAggregate
+{
+    public $label;
+    public $choices;
+
+    /**
+     * Creates a new choice group view.
+     *
+     * @param array<ChoiceGroupView|ChoiceView> $choices the choice views in the group
+     */
+    public function __construct(string $label, array $choices = [])
+    {
+        $this->label = $label;
+        $this->choices = $choices;
+    }
+
+    /**
+     * @return \Traversable<array-key, ChoiceGroupView|ChoiceView>
+     */
+    public function getIterator(): \Traversable
+    {
+        return new \ArrayIterator($this->choices);
+    }
+}

lib/symfony/form/ChoiceList/View/ChoiceListView.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\ChoiceList\View;
+
+/**
+ * Represents a choice list in templates.
+ *
+ * A choice list contains choices and optionally preferred choices which are
+ * displayed in the very beginning of the list. Both choices and preferred
+ * choices may be grouped in {@link ChoiceGroupView} instances.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ChoiceListView
+{
+    public $choices;
+    public $preferredChoices;
+
+    /**
+     * Creates a new choice list view.
+     *
+     * @param array<ChoiceGroupView|ChoiceView> $choices          The choice views
+     * @param array<ChoiceGroupView|ChoiceView> $preferredChoices the preferred choice views
+     */
+    public function __construct(array $choices = [], array $preferredChoices = [])
+    {
+        $this->choices = $choices;
+        $this->preferredChoices = $preferredChoices;
+    }
+
+    /**
+     * Returns whether a placeholder is in the choices.
+     *
+     * A placeholder must be the first child element, not be in a group and have an empty value.
+     */
+    public function hasPlaceholder(): bool
+    {
+        if ($this->preferredChoices) {
+            $firstChoice = reset($this->preferredChoices);
+
+            return $firstChoice instanceof ChoiceView && '' === $firstChoice->value;
+        }
+
+        $firstChoice = reset($this->choices);
+
+        return $firstChoice instanceof ChoiceView && '' === $firstChoice->value;
+    }
+}

lib/symfony/form/ChoiceList/View/ChoiceView.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\ChoiceList\View;
+
+use Symfony\Contracts\Translation\TranslatableInterface;
+
+/**
+ * Represents a choice in templates.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ChoiceView
+{
+    public $label;
+    public $value;
+    public $data;
+
+    /**
+     * Additional attributes for the HTML tag.
+     */
+    public $attr;
+
+    /**
+     * Additional parameters used to translate the label.
+     */
+    public $labelTranslationParameters;
+
+    /**
+     * Creates a new choice view.
+     *
+     * @param mixed                              $data                       The original choice
+     * @param string                             $value                      The view representation of the choice
+     * @param string|TranslatableInterface|false $label                      The label displayed to humans; pass false to discard the label
+     * @param array                              $attr                       Additional attributes for the HTML tag
+     * @param array                              $labelTranslationParameters Additional parameters used to translate the label
+     */
+    public function __construct(mixed $data, string $value, string|TranslatableInterface|false $label, array $attr = [], array $labelTranslationParameters = [])
+    {
+        $this->data = $data;
+        $this->value = $value;
+        $this->label = $label;
+        $this->attr = $attr;
+        $this->labelTranslationParameters = $labelTranslationParameters;
+    }
+}