add nova

nova/src/Fields/Slug.php

@@ -0,0 +1,110 @@
+<?php
+
+namespace Laravel\Nova\Fields;
+
+use Illuminate\Support\Str;
+use Laravel\Nova\Contracts\Previewable;
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+class Slug extends Field implements Previewable
+{
+    /**
+     * The field's component.
+     *
+     * @var string
+     */
+    public $component = 'slug-field';
+
+    /**
+     * The field the slug should be generated from.
+     *
+     * @var string|\Laravel\Nova\Fields\Field
+     */
+    public $from;
+
+    /**
+     * The separator to use for the slug.
+     *
+     * @var string
+     */
+    public $separator = '-';
+
+    /**
+     * Whether to show the field's customize button.
+     *
+     * @var bool
+     */
+    public $showCustomizeButton = false;
+
+    /**
+     * Create a new field.
+     *
+     * @param  string  $name
+     * @param  string|\Closure|callable|object|null  $attribute
+     * @param  (callable(mixed, mixed, ?string):(mixed))|null  $resolveCallback
+     * @return void
+     */
+    public function __construct($name, $attribute = null, callable $resolveCallback = null)
+    {
+        parent::__construct($name, $attribute, $resolveCallback);
+    }
+
+    /**
+     * The field the slug should be generated from.
+     *
+     * @param  string|\Laravel\Nova\Fields\Field  $from
+     * @return $this
+     */
+    public function from($from)
+    {
+        $this->from = $from;
+
+        return $this;
+    }
+
+    /**
+     * Set the separator used for slugifying the field.
+     *
+     * @param  string  $separator
+     * @return $this
+     */
+    public function separator($separator)
+    {
+        $this->separator = $separator;
+
+        return $this;
+    }
+
+    /**
+     * Return a preview for the given field value.
+     *
+     * @param  string  $value
+     * @return mixed
+     */
+    public function previewFor($value)
+    {
+        return Str::slug($value, $this->separator);
+    }
+
+    /**
+     * Prepare the element for JSON serialization.
+     *
+     * @return array<string, mixed>
+     */
+    public function jsonSerialize(): array
+    {
+        $request = app(NovaRequest::class);
+
+        if ($request->isUpdateOrUpdateAttachedRequest()) {
+            $this->readonly();
+            $this->showCustomizeButton = true;
+        }
+
+        return array_merge([
+            'updating' => $request->isUpdateOrUpdateAttachedRequest(),
+            'from' => $this->from instanceof Field ? $this->from->attribute : str_replace(' ', '_', Str::lower((string) $this->from)),
+            'separator' => $this->separator,
+            'showCustomizeButton' => $this->showCustomizeButton,
+        ], parent::jsonSerialize());
+    }
+}