Can now create jobs, and set prerequisites for the fake provider, which will be skipped when they're not necessary.

app/Import/Prerequisites/FakePrerequisites.php

@@ -0,0 +1,127 @@
+<?php
+/**
+ * FakePrerequisites.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+declare(strict_types=1);
+
+namespace FireflyIII\Import\Prerequisites;
+
+use FireflyIII\User;
+use Illuminate\Http\Request;
+use Illuminate\Support\MessageBag;
+
+/**
+ * This class contains all the routines necessary for the fake import provider.
+ *
+ * Class FakePrerequisites
+ */
+class FakePrerequisites implements PrerequisitesInterface
+{
+    /** @var User */
+    private $user;
+
+    /**
+     * Returns view name that allows user to fill in prerequisites. Currently asks for the API key.
+     *
+     * @return string
+     */
+    public function getView(): string
+    {
+        return 'import.fake.prerequisites';
+    }
+
+    /**
+     * Returns any values required for the prerequisites-view.
+     *
+     * @return array
+     */
+    public function getViewParameters(): array
+    {
+        $apiKey = '';
+        if ($this->hasApiKey()) {
+            $apiKey = app('preferences')->getForUser($this->user, 'fake_api_key', null)->data;
+        }
+        $oldKey = (string)\request()->old('api_key');
+        if ($oldKey !== '') {
+            $apiKey = \request()->old('api_key');
+        }
+
+        return ['api_key' => $apiKey];
+    }
+
+    /**
+     * Indicate if all prerequisites have been met.
+     *
+     * @return bool
+     */
+    public function isComplete(): bool
+    {
+        return $this->hasApiKey();
+    }
+
+    /**
+     * Set the user for this Prerequisites-routine. Class is expected to implement and save this.
+     *
+     * @param User $user
+     */
+    public function setUser(User $user): void
+    {
+        $this->user = $user;
+
+    }
+
+    /**
+     * @param Request $request
+     *
+     * @return MessageBag
+     */
+    public function storePrerequisites(Request $request): MessageBag
+    {
+        $apiKey     = (string)$request->get('api_key');
+        $messageBag = new MessageBag();
+        if (32 !== \strlen($apiKey)) {
+            $messageBag->add('api_key', 'API key must be 32 chars.');
+
+            return $messageBag;
+        }
+
+        app('preferences')->setForUser($this->user, 'fake_api_key', $apiKey);
+
+        return $messageBag;
+    }
+
+    /**
+     * @return bool
+     */
+    private function hasApiKey(): bool
+    {
+        $apiKey = app('preferences')->getForUser($this->user, 'fake_api_key', false);
+        if (null === $apiKey) {
+            return false;
+        }
+        if (null === $apiKey->data) {
+            return false;
+        }
+        if (\strlen((string)$apiKey->data) === 32) {
+            return true;
+        }
+
+        return false;
+    }
+}