wip

nova-components/InlineRelationship/src/FieldServiceProvider.php

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+<?php
+
+namespace Nurmuhammet\InlineRelationship;
+
+use Illuminate\Support\Facades\Route;
+use Illuminate\Support\ServiceProvider;
+use Laravel\Nova\Events\ServingNova;
+use Laravel\Nova\Nova;
+
+class FieldServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        $this->app->booted(function () {
+            $this->routes();
+        });
+
+        Nova::serving(function (ServingNova $event) {
+            Nova::script('inline-relationship', __DIR__.'/../dist/js/field.js');
+            Nova::style('inline-relationship', __DIR__.'/../dist/css/field.css');
+        });
+    }
+
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+
+    /**
+     * Package Routes
+     */
+    protected function routes(): void
+    {
+        if ($this->app->routesAreCached()) {
+            return;
+        }
+
+        Route::middleware(['nova'])
+            ->prefix('nova-vendor/nurmuhammet/inline-relationship')
+            ->group(__DIR__.'/../routes/api.php');
+    }
+}

nova-components/InlineRelationship/src/Http/Controllers/InlineRelationshipController.php

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+<?php
+
+namespace Nurmuhammet\InlineRelationship\Http\Controllers;
+
+class InlineRelationshipController {}

nova-components/InlineRelationship/src/InlineRelationship.php

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+<?php
+
+namespace Nurmuhammet\InlineRelationship;
+
+use Exception;
+use Laravel\Nova\Fields\Field;
+use Laravel\Nova\Fields\SupportsDependentFields;
+
+class InlineRelationship extends Field
+{
+    use SupportsDependentFields;
+
+    /**
+     * The field's component.
+     *
+     * @var string
+     */
+    public $component = 'inline-relationship';
+
+    /**
+     * Related resource name
+     */
+    protected string $relatedResourceName;
+
+    /**
+     * Resource relationship attribute to related resource
+     */
+    protected string $relationshipAttribute;
+
+    /**
+     * Related resource
+     */
+    protected string $relatedResource;
+
+    /**
+     * Relationship type
+     */
+    protected string $relationshipType;
+
+    /**
+     * Create a new field.
+     *
+     * @param  string|null  $attribute
+     * @param  class-string<\Laravel\Nova\Resource>|null  $resource
+     * @return void
+     */
+    public function __construct(string $name, string $attribute, string $resource)
+    {
+        parent::__construct($name, $attribute);
+
+        $this->relatedResourceName = $name;
+        $this->relationshipAttribute = $attribute;
+        $this->relatedResource = $resource;
+        $this->relatedResourceURI = $resource::uriKey();
+        $this->relationshipType = $this->guessRelationshipType();
+
+        $this->validate();
+
+        $this->fullWidth();
+        $this->transformDataForFrontend();
+    }
+
+    /**
+     * Validate user's arguments
+     */
+    public function validate(): void
+    {
+        in_array($this->relationshipType, $this->allowedRelationships())
+            ? true
+            : throw new Exception("Selected relationship ({$relationshipType}) is not allowed");
+    }
+
+    /**
+     * Alloed relationships
+     */
+    public function allowedRelationships(): array
+    {
+        return [
+            'Illuminate\\Database\\Eloquent\\Relations\\HasMany',
+        ];
+    }
+
+    /**
+     * Guess relationship type from related resource
+     */
+    public function guessRelationshipType(): string
+    {
+        return get_class((new $this->relatedResource::$model)->{$this->relationshipAttribute}());
+    }
+
+    /**
+     * Formatted relationship name
+     */
+    public function formattedRelatioshipName(): string
+    {
+        return match ($this->relationshipType) {
+            'Illuminate\\Database\\Eloquent\\Relations\\HasMany' => 'hasMany',
+        };
+    }
+
+    /**
+     * Transform data to frontend
+     */
+    public function transformDataForFrontend(): self
+    {
+        return $this->withMeta([
+            'singularLabel' => $this->relatedResource::singularLabel(),
+            'relatedResourceName' => $this->relatedResourceName,
+            'relationshipAttribute' => $this->relationshipAttribute,
+            'relatedResource' => $this->relatedResource,
+            'relatedResourceURI' => $this->relatedResourceURI,
+            'relationshipType' => $this->formattedRelatioshipName(),
+        ]);
+    }
+}