Zapier integration (#491)

* create zapier app

* install sanctum

* move OAuthProviderController

* make `api-external` middleware

* add zapier endpoints

* add tests

* token management

* zapier event handler

* add policy

* use `slug` instead of `id`

* wip

* check policies

* change api prefix to `external`

* ui tweaks

* validate token abilities

* open zapier URL

* zapier ui tweaks

* update zap

* Fix linting

* Added sample endpoints + minor UI changes

* Run PHP code linter

---------

Co-authored-by: Julien Nahum <julien@nahum.net>

routes/api-external.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * External API calls
+ */
+
+use App\Http\Controllers\Integrations\Zapier;
+use App\Http\Controllers\Integrations\Zapier\ListFormsController;
+use App\Http\Controllers\Integrations\Zapier\ListWorkspacesController;
+
+Route::prefix('external')
+    ->middleware('auth:sanctum')
+    ->group(function () {
+        Route::prefix('zapier')->name('zapier.')->group(function () {
+            Route::get('validate', Zapier\ValidateAuthController::class)
+                ->name('validate');
+
+            // Set and delete webhooks / manage integrations
+            Route::middleware('ability:manage-integrations')
+                ->name('webhooks.')
+                ->group(function () {
+                    Route::post('webhook', [Zapier\IntegrationController::class, 'store'])
+                        ->name('store');
+
+                    Route::delete('webhook', [Zapier\IntegrationController::class, 'destroy'])
+                        ->name('destroy');
+                    Route::get('submissions/recent', [Zapier\IntegrationController::class, 'poll'])->name('poll');
+                });
+
+            Route::get('workspaces', ListWorkspacesController::class)
+                ->middleware('ability:list-workspaces')
+                ->name('workspaces');
+
+            Route::get('forms', ListFormsController::class)
+                ->middleware('ability:list-forms')
+                ->name('forms');
+        });
+    });