From fd42a3f17394ae73711133b3ad2f69b5e626fad4 Mon Sep 17 00:00:00 2001
From: david <david@joules.ch>
Date: Wed, 24 Jul 2024 01:48:27 +0200
Subject: [PATCH] backups

---
 .forgejo/workflows/ci_cd.yml                  |  2 +-
 .gitignore                                    |  3 +-
 app/controllers/admin/backups_controller.rb   |  8 ++
 app/models/admin/backup.rb                    | 89 +++++++++++++++++++
 app/views/home/show.html.erb                  |  4 +
 config/routes.rb                              |  6 +-
 .../admin/backups_controller_test.rb          |  8 ++
 test/system/admin/backups_test.rb             |  7 ++
 8 files changed, 123 insertions(+), 4 deletions(-)
 create mode 100644 app/controllers/admin/backups_controller.rb
 create mode 100644 app/models/admin/backup.rb
 create mode 100644 test/controllers/admin/backups_controller_test.rb
 create mode 100644 test/system/admin/backups_test.rb

diff --git a/.forgejo/workflows/ci_cd.yml b/.forgejo/workflows/ci_cd.yml
index 0005afc..0f17daa 100644
--- a/.forgejo/workflows/ci_cd.yml
+++ b/.forgejo/workflows/ci_cd.yml
@@ -29,7 +29,7 @@ jobs:
       - run: mv /app/node_modules .
       - run: bundle exec rails test
 
-  system_test:
+  system-test:
     runs-on: docker
     name: Run system tests
     container: code.hohl.cloud/jwa11y/a11yist:ci
diff --git a/.gitignore b/.gitignore
index c1c4704..f03a098 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,4 +40,5 @@
 /node_modules
 /.irbrc_history
 .~lock*
-.build_version
\ No newline at end of file
+.build_version
+/core*
\ No newline at end of file
diff --git a/app/controllers/admin/backups_controller.rb b/app/controllers/admin/backups_controller.rb
new file mode 100644
index 0000000..65dcf87
--- /dev/null
+++ b/app/controllers/admin/backups_controller.rb
@@ -0,0 +1,8 @@
+module Admin
+  class BackupsController < ApplicationController
+    # GET /admin/backups/1
+    def show
+      send_file Backup.db_xlsx, filename: 'backup.xlsx', disposition: :attachment
+    end
+  end
+end
diff --git a/app/models/admin/backup.rb b/app/models/admin/backup.rb
new file mode 100644
index 0000000..40d6bbb
--- /dev/null
+++ b/app/models/admin/backup.rb
@@ -0,0 +1,89 @@
+module Admin
+  class Backup
+    class << self
+      def zip
+        create_records_xlsx
+
+        ZipFileGenerator.new(Rails.root.join('storage')).write
+      end
+
+      def db_xlsx
+        xlsx = Axlsx::Package.new
+        workbook = xlsx.workbook
+        ActiveRecord::Base.connection.tables.each do |table|
+          klass = table.classify.safe_constantize
+          next unless klass
+
+          workbook.add_worksheet(name: table) do |sheet|
+            sheet << klass.attribute_names
+            klass.find_each do |record|
+              sheet << record.attributes.values
+            end
+          end
+        end
+        path = Rails.root.join('storage/data.xls')
+        xlsx.serialize(path)
+        path
+      end
+
+      private
+
+      def file_path(name)
+        Rails.root.join('storage', name)
+      end
+    end
+  end
+
+  # This is a simple example which uses rubyzip to
+  # recursively generate a zip file from the contents of
+  # a specified directory. The directory itself is not
+  # included in the archive, rather just its contents.
+  #
+  # Usage:
+  #   directory_to_zip = "/tmp/input"
+  #   output_file = "/tmp/out.zip"
+  #   zf = ZipFileGenerator.new(directory_to_zip, output_file)
+  #   zf.write()
+  class ZipFileGenerator
+    # Initialize with the directory to zip and the location of the output archive.
+    def initialize(input_dir)
+      @input_dir = input_dir
+    end
+
+    # Zip the input directory.
+    def write
+      entries = Dir.entries(@input_dir) - %w[. ..]
+      path = Rails.root.join('tmp', Time.now.to_i.to_s)
+      ::Zip::File.open(path, create: true) do |zipfile|
+        write_entries entries, '', zipfile
+      end
+      path
+    end
+
+    private
+
+    # A helper method to make the recursion work.
+    def write_entries(entries, path, zipfile)
+      entries.each do |e|
+        zipfile_path = path == '' ? e : File.join(path, e)
+        disk_file_path = File.join(@input_dir, zipfile_path)
+
+        if File.directory? disk_file_path
+          recursively_deflate_directory(disk_file_path, zipfile, zipfile_path)
+        else
+          put_into_archive(disk_file_path, zipfile, zipfile_path)
+        end
+      end
+    end
+
+    def recursively_deflate_directory(disk_file_path, zipfile, zipfile_path)
+      zipfile.mkdir zipfile_path
+      subdir = Dir.entries(disk_file_path) - %w[. ..]
+      write_entries subdir, zipfile_path, zipfile
+    end
+
+    def put_into_archive(disk_file_path, zipfile, zipfile_path)
+      zipfile.add(zipfile_path, disk_file_path)
+    end
+  end
+end
diff --git a/app/views/home/show.html.erb b/app/views/home/show.html.erb
index 6f689df..b9e3e6a 100644
--- a/app/views/home/show.html.erb
+++ b/app/views/home/show.html.erb
@@ -17,3 +17,7 @@
 <%= Check.count %>
 <%= link_to Check.model_name.human(count: Check.count), :checks %>
 </p>
+
+<p>
+  <%= link_to "Backup herunterladen", admin_backup_url, class: "btn btn-secondary", data: { turbo_prefetch: false, frame: "_top", turbo: false } %>
+</p>
\ No newline at end of file
diff --git a/config/routes.rb b/config/routes.rb
index bfd0427..92e3784 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,5 +1,9 @@
 # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 Rails.application.routes.draw do
+  namespace :admin do
+    get "backup", to: "backups#show", as: :backup
+  end
+
   resources :reports
   resources :checklists
   resources :checks
@@ -8,8 +12,6 @@ Rails.application.routes.draw do
   resources :success_criteria
   resources :elements
 
-  get 'home/show', as: :home
-
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.
   # Can be used by load balancers and uptime monitors to verify that the app is live.
   get 'up' => 'rails/health#show', as: :rails_health_check
diff --git a/test/controllers/admin/backups_controller_test.rb b/test/controllers/admin/backups_controller_test.rb
new file mode 100644
index 0000000..7e5ef21
--- /dev/null
+++ b/test/controllers/admin/backups_controller_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class Admin::BackupsControllerTest < ActionDispatch::IntegrationTest
+  test 'should show admin_backup' do
+    get admin_backup_url(@admin_backup)
+    assert_response :success
+  end
+end
diff --git a/test/system/admin/backups_test.rb b/test/system/admin/backups_test.rb
new file mode 100644
index 0000000..3cc9dd1
--- /dev/null
+++ b/test/system/admin/backups_test.rb
@@ -0,0 +1,7 @@
+require 'application_system_test_case'
+
+class Admin::BackupsTest < ApplicationSystemTestCase
+  test 'should create backup' do
+    visit admin_backup_url
+  end
+end