New feature: option to delete all meta data from your account.

app/Http/Controllers/Profile/DataController.php

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+<?php
+/**
+ * DataController.php
+ * Copyright (c) 2019 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/>.
+ */
+
+namespace FireflyIII\Http\Controllers\Profile;
+
+
+use FireflyIII\Http\Controllers\Controller;
+use FireflyIII\Repositories\Budget\AvailableBudgetRepositoryInterface;
+use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Repositories\Category\CategoryRepositoryInterface;
+use FireflyIII\Repositories\Tag\TagRepositoryInterface;
+use Illuminate\Http\RedirectResponse;
+
+/**
+ * Class DataController
+ */
+class DataController extends Controller
+{
+
+    /**
+     *
+     */
+    public function deleteBudgets(): RedirectResponse
+    {
+        /** @var AvailableBudgetRepositoryInterface $abRepository */
+        $abRepository = app(AvailableBudgetRepositoryInterface::class);
+        $abRepository->destroyAll();
+
+        /** @var BudgetLimitRepositoryInterface $blRepository */
+        $blRepository = app(BudgetLimitRepositoryInterface::class);
+        $blRepository->destroyAll();
+
+        /** @var BudgetRepositoryInterface $budgetRepository */
+        $budgetRepository = app(BudgetRepositoryInterface::class);
+        $budgetRepository->destroyAll();
+
+        session()->flash('success', trans('firefly.deleted_all_budgets'));
+
+        return redirect(route('profile.index'));
+    }
+
+    /**
+     *
+     */
+    public function deleteCategories(): RedirectResponse
+    {
+        /** @var CategoryRepositoryInterface $categoryRepos */
+        $categoryRepos = app(CategoryRepositoryInterface::class);
+        $categoryRepos->destroyAll();
+
+        session()->flash('success', trans('firefly.deleted_all_categories'));
+
+        return redirect(route('profile.index'));
+    }
+
+
+    /**
+     *
+     */
+    public function deleteTags(): RedirectResponse
+    {
+        /** @var TagRepositoryInterface $tagRepository */
+        $tagRepository = app(TagRepositoryInterface::class);
+        $tagRepository->destroyAll();
+
+        session()->flash('success', trans('firefly.deleted_all_tags'));
+
+        return redirect(route('profile.index'));
+    }
+}