Add editable project template flow

app/Http/Controllers/ProjectTemplateController.php

@@ -4,7 +4,9 @@ namespace App\Http\Controllers;
 
 use App\Actions\Projects\CreateProjectTemplate;
 use App\Actions\Projects\DuplicateProjectConfiguration;
+use App\Actions\Projects\UpdateProjectTemplate;
 use App\Http\Requests\StoreProjectTemplateRequest;
+use App\Http\Requests\UpdateProjectTemplateRequest;
 use App\Http\Resources\ProjectResource;
 use App\Http\Resources\ProjectTemplateResource;
 use App\Models\Project;
@@ -18,6 +20,7 @@ class ProjectTemplateController extends Controller
 {
     public function __construct(
         private readonly CreateProjectTemplate $createProjectTemplate,
+        private readonly UpdateProjectTemplate $updateProjectTemplate,
     ) {}
 
     public function index(Request $request): Response
@@ -28,12 +31,25 @@ class ProjectTemplateController extends Controller
                 ProjectTemplate::query()
                     ->published()
                     ->with('sourceProject')
+                    ->withCount('linkedProjects')
                     ->orderBy('name')
                     ->get(),
             )->resolve(),
         ]);
     }
 
+    public function edit(ProjectTemplate $projectTemplate): Response
+    {
+        abort_if(! $projectTemplate->is_published, 404);
+
+        $projectTemplate->load('sourceProject')->loadCount('linkedProjects');
+
+        return Inertia::render('project-templates/Edit', [
+            'copyAreaOptions' => DuplicateProjectConfiguration::copyAreaOptions(),
+            'template' => ProjectTemplateResource::make($projectTemplate)->resolve(),
+        ]);
+    }
+
     public function create(Project $project): Response
     {
         return Inertia::render('project-templates/Create', [
@@ -50,6 +66,16 @@ class ProjectTemplateController extends Controller
             ->with('status', "Template {$template->name} was created.");
     }
 
+    public function update(UpdateProjectTemplateRequest $request, ProjectTemplate $projectTemplate): RedirectResponse
+    {
+        abort_if(! $projectTemplate->is_published, 404);
+
+        $template = $this->updateProjectTemplate->handle($projectTemplate, $request->validated());
+
+        return to_route('project-templates.index')
+            ->with('status', "Template {$template->name} was updated.");
+    }
+
     public function destroy(ProjectTemplate $projectTemplate): RedirectResponse
     {
         abort_if(! $projectTemplate->is_published, 404);

app/Http/Requests/UpdateProjectTemplateRequest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Http\Requests;
+
+use App\Actions\Projects\DuplicateProjectConfiguration;
+use App\Models\ProjectTemplate;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class UpdateProjectTemplateRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user()?->can('create-project') ?? false;
+    }
+
+    /**
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        /** @var ProjectTemplate|null $projectTemplate */
+        $projectTemplate = $this->route('projectTemplate');
+        $requiresImpactConfirmation = $projectTemplate?->linkedProjects()->exists() ?? false;
+
+        return [
+            'name' => ['required', 'string', 'max:255'],
+            'copy_areas' => ['required', 'array', 'min:1'],
+            'copy_areas.*' => ['string', Rule::in(DuplicateProjectConfiguration::copyableAreas())],
+            'confirm_linked_projects_update' => [
+                Rule::requiredIf($requiresImpactConfirmation),
+                'accepted',
+            ],
+        ];
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function messages(): array
+    {
+        return [
+            'confirm_linked_projects_update.accepted' => 'Acknowledge the linked project warning before saving template changes.',
+        ];
+    }
+}

app/Http/Resources/ProjectTemplateResource.php

@@ -29,6 +29,7 @@ class ProjectTemplateResource extends JsonResource
                 'is_published' => $this->is_published,
                 'copy_areas' => $this->copy_areas ?? [],
                 'configuration_snapshot' => $this->configuration_snapshot ?? [],
+                'linked_project_count' => $this->whenCounted('linkedProjects'),
                 'created_at' => $this->created_at?->toISOString(),
                 'updated_at' => $this->updated_at?->toISOString(),
             ];
@@ -44,6 +45,7 @@ class ProjectTemplateResource extends JsonResource
             'is_published' => Arr::get($this->resource, 'is_published', true),
             'copy_areas' => Arr::get($this->resource, 'copy_areas', []),
             'configuration_snapshot' => Arr::get($this->resource, 'configuration_snapshot', []),
+            'linked_project_count' => Arr::get($this->resource, 'linked_project_count'),
             'created_at' => Arr::get($this->resource, 'created_at'),
             'updated_at' => Arr::get($this->resource, 'updated_at'),
         ];