Migrate from ledermann/rails-settings to rails-settings-cached which allows global settings

with YAML-defined defaults. Add admin page for editing global settings. Add "site_description"
setting that would show as a paragraph on the frontpage

Gemfile

@@ -17,6 +17,7 @@ gem 'pg'
 gem 'pghero'
 gem 'dotenv-rails'
 gem 'font-awesome-rails'
+gem 'best_in_place', '~> 3.0.1'
 
 gem 'paperclip', '~> 5.0'
 gem 'paperclip-av-transcoder'
@@ -43,7 +44,7 @@ gem 'will_paginate'
 gem 'rack-attack'
 gem 'rack-cors', require: 'rack/cors'
 gem 'sidekiq'
-gem 'ledermann-rails-settings'
+gem 'rails-settings-cached'
 gem 'pg_search'
 gem 'simple-navigation'
 

Gemfile.lock

@@ -60,6 +60,9 @@ GEM
       babel-source (>= 4.0, < 6)
       execjs (~> 2.0)
     bcrypt (3.1.11)
+    best_in_place (3.0.3)
+      actionpack (>= 3.2)
+      railties (>= 3.2)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
@@ -172,8 +175,6 @@ GEM
     json (1.8.3)
     launchy (2.4.3)
       addressable (~> 2.3)
-    ledermann-rails-settings (2.4.2)
-      activerecord (>= 3.1)
     letter_opener (1.4.1)
       launchy (~> 2.2)
     link_header (0.0.8)
@@ -259,6 +260,8 @@ GEM
       nokogiri (~> 1.6.0)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
+    rails-settings-cached (0.6.5)
+      rails (>= 4.2.0)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
@@ -405,6 +408,7 @@ DEPENDENCIES
   addressable
   autoprefixer-rails
   aws-sdk (>= 2.0)
+  best_in_place (~> 3.0.1)
   better_errors
   binding_of_caller
   browserify-rails
@@ -426,7 +430,6 @@ DEPENDENCIES
   i18n-tasks (~> 0.9.6)
   jbuilder (~> 2.0)
   jquery-rails
-  ledermann-rails-settings
   letter_opener
   link_header
   lograge
@@ -445,6 +448,7 @@ DEPENDENCIES
   rack-cors
   rack-timeout-puma
   rails (~> 5.0.1.0)
+  rails-settings-cached
   rails_12factor
   rails_autolink
   react-rails

app/assets/javascripts/application_public.js

@@ -1,3 +1,8 @@
 //= require jquery
 //= require jquery_ujs
 //= require extras
+//= require best_in_place
+
+$(function () {
+  $(".best_in_place").best_in_place();
+});

app/assets/stylesheets/tables.scss

@@ -36,6 +36,10 @@
       text-decoration: none;
     }
   }
+
+  strong {
+    font-weight: 500;
+  }
 }
 
 samp {

app/controllers/about_controller.rb

@@ -4,10 +4,10 @@ class AboutController < ApplicationController
   before_action :set_body_classes
 
   def index
+    @description = Setting.site_description
   end
 
-  def terms
-  end
+  def terms; end
 
   private
 

app/controllers/admin/settings_controller.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class Admin::SettingsController < ApplicationController
+  before_action :require_admin!
+
+  layout 'admin'
+
+  def index
+    @settings = Setting.all_as_records
+  end
+
+  def update
+    @setting = Setting.where(var: params[:id]).first_or_initialize(var: params[:id])
+
+    if @setting.value != params[:setting][:value]
+      @setting.value = params[:setting][:value]
+      @setting.save
+    end
+
+    respond_to do |format|
+      format.html { redirect_to admin_settings_path }
+      format.json { respond_with_bip(@setting) }
+    end
+  end
+end

app/controllers/settings/preferences_controller.rb

@@ -8,14 +8,18 @@ class Settings::PreferencesController < ApplicationController
   def show; end
 
   def update
-    current_user.settings(:notification_emails).follow         = user_params[:notification_emails][:follow]         == '1'
-    current_user.settings(:notification_emails).follow_request = user_params[:notification_emails][:follow_request] == '1'
-    current_user.settings(:notification_emails).reblog         = user_params[:notification_emails][:reblog]         == '1'
-    current_user.settings(:notification_emails).favourite      = user_params[:notification_emails][:favourite]      == '1'
-    current_user.settings(:notification_emails).mention        = user_params[:notification_emails][:mention]        == '1'
+    current_user.settings['notification_emails'] = {
+      follow:         user_params[:notification_emails][:follow]         == '1',
+      follow_request: user_params[:notification_emails][:follow_request] == '1',
+      reblog:         user_params[:notification_emails][:reblog]         == '1',
+      favourite:      user_params[:notification_emails][:favourite]      == '1',
+      mention:        user_params[:notification_emails][:mention]        == '1',
+    }
 
-    current_user.settings(:interactions).must_be_follower  = user_params[:interactions][:must_be_follower]  == '1'
-    current_user.settings(:interactions).must_be_following = user_params[:interactions][:must_be_following] == '1'
+    current_user.settings['interactions'] = {
+      must_be_follower:  user_params[:interactions][:must_be_follower]  == '1',
+      must_be_following: user_params[:interactions][:must_be_following] == '1',
+    }
 
     if current_user.update(user_params.except(:notification_emails, :interactions))
       redirect_to settings_preferences_path, notice: I18n.t('generic.changes_saved_msg')

app/helpers/settings_helper.rb

@@ -14,4 +14,8 @@ module SettingsHelper
   def human_locale(locale)
     HUMAN_LOCALES[locale]
   end
+
+  def hash_to_object(hash)
+    HashObject.new(hash)
+  end
 end

app/lib/hash_object.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class HashObject
+  def initialize(hash)
+    hash.each do |k, v|
+      instance_variable_set("@#{k}", v)
+      self.class.send(:define_method, k, proc { instance_variable_get("@#{k}") })
+    end
+  end
+end

app/models/setting.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class Setting < RailsSettings::Base
+  source Rails.root.join('config/settings.yml')
+  namespace Rails.env
+
+  def to_param
+    var
+  end
+
+  class << self
+    def all_as_records
+      vars    = thing_scoped
+      records = vars.map { |r| [r.var, r] }.to_h
+
+      default_settings.each do |key, default_value|
+        next if records.key?(key) || default_value.is_a?(Hash)
+        records[key] = Setting.new(var: key, value: default_value)
+      end
+
+      records
+    end
+
+    private
+
+    def default_settings
+      return {} unless RailsSettings::Default.enabled?
+      RailsSettings::Default.instance
+    end
+  end
+end

app/models/user.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 class User < ApplicationRecord
+  include RailsSettings::Extend
+
   devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable, :confirmable
 
   belongs_to :account, inverse_of: :user
@@ -14,11 +16,6 @@ class User < ApplicationRecord
   scope :recent,   -> { order('id desc') }
   scope :admins,   -> { where(admin: true) }
 
-  has_settings do |s|
-    s.key :notification_emails, defaults: { follow: false, reblog: false, favourite: false, mention: false, follow_request: true }
-    s.key :interactions, defaults: { must_be_follower: false, must_be_following: false }
-  end
-
   def send_devise_notification(notification, *args)
     devise_mailer.send(notification, self, *args).deliver_later
   end

app/services/notify_service.rb

@@ -41,8 +41,8 @@ class NotifyService < BaseService
     blocked ||= @recipient.id == @notification.from_account.id                                                                     # Skip for interactions with self
     blocked ||= @recipient.blocking?(@notification.from_account)                                                                   # Skip for blocked accounts
     blocked ||= (@notification.from_account.silenced? && !@recipient.following?(@notification.from_account))                       # Hellban
-    blocked ||= (@recipient.user.settings(:interactions).must_be_follower  && !@notification.from_account.following?(@recipient)) # Options
-    blocked ||= (@recipient.user.settings(:interactions).must_be_following && !@recipient.following?(@notification.from_account)) # Options
+    blocked ||= (@recipient.user.settings.interactions['must_be_follower']  && !@notification.from_account.following?(@recipient)) # Options
+    blocked ||= (@recipient.user.settings.interactions['must_be_following'] && !@recipient.following?(@notification.from_account)) # Options
     blocked ||= send("blocked_#{@notification.type}?")                                                                             # Type-dependent filters
     blocked
   end
@@ -58,6 +58,6 @@ class NotifyService < BaseService
   end
 
   def email_enabled?
-    @recipient.user.settings(:notification_emails).send(@notification.type)
+    @recipient.user.settings.notification_emails[@notification.type]
   end
 end

app/views/about/index.html.haml

@@ -8,7 +8,7 @@
   %meta{ property: 'og:site_name', content: 'Mastodon' }/
   %meta{ property: 'og:type', content: 'website' }/
   %meta{ property: 'og:title', content: Rails.configuration.x.local_domain }/
-  %meta{ property: 'og:description', content: "Mastodon is a free, open-source social network server. A decentralized alternative to commercial platforms, it avoids the risks of a single company monopolizing your communication. Anyone can run Mastodon and participate in the social network seamlessly" }/
+  %meta{ property: 'og:description', content: @description.blank? ? "Mastodon is a free, open-source social network server. A decentralized alternative to commercial platforms, it avoids the risks of a single company monopolizing your communication. Anyone can run Mastodon and participate in the social network seamlessly" : strip_tags(@description) }/
   %meta{ property: 'og:image', content: asset_url('mastodon_small.jpg') }/
   %meta{ property: 'og:image:width', content: '400' }/
   %meta{ property: 'og:image:height', content: '400' }/
@@ -24,6 +24,9 @@
 
   .screenshot= image_tag 'screenshot.png'
 
+  - unless @description.blank?
+    %p= @description.html_safe
+
   .actions
     .info
       = link_to t('about.terms'), terms_path

app/views/admin/settings/index.html.haml

@@ -0,0 +1,22 @@
+- content_for :page_title do
+  Site Settings
+
+%table.table
+  %colgroup
+    %col{ width: '35%' }/
+  %thead
+    %tr
+      %th Setting
+      %th Click to edit
+  %tbody
+    %tr
+      %td
+        %strong Site description
+        %br/
+        Displayed as a paragraph on the frontpage and used as a meta tag.
+        %br/
+        You can use HTML tags, in particular
+        %code= '<a>'
+        and
+        %code= '<em>'
+      %td= best_in_place @settings['site_description'], :value, as: :textarea, url: admin_setting_path(@settings['site_description'])

app/views/settings/preferences/show.html.haml

@@ -6,14 +6,14 @@
 
   = f.input :locale, collection: I18n.available_locales, wrapper: :with_label, include_blank: false, label_method: lambda { |locale| human_locale(locale) }
 
-  = f.simple_fields_for :notification_emails, current_user.settings(:notification_emails) do |ff|
+  = f.simple_fields_for :notification_emails, hash_to_object(current_user.settings.notification_emails) do |ff|
     = ff.input :follow, as: :boolean, wrapper: :with_label
     = ff.input :follow_request, as: :boolean, wrapper: :with_label
     = ff.input :reblog, as: :boolean, wrapper: :with_label
     = ff.input :favourite, as: :boolean, wrapper: :with_label
     = ff.input :mention, as: :boolean, wrapper: :with_label
 
-  = f.simple_fields_for :interactions, current_user.settings(:interactions) do |ff|
+  = f.simple_fields_for :interactions, hash_to_object(current_user.settings.interactions) do |ff|
     = ff.input :must_be_follower, as: :boolean, wrapper: :with_label
     = ff.input :must_be_following, as: :boolean, wrapper: :with_label
 

config/navigation.rb

@@ -7,5 +7,6 @@ SimpleNavigation::Configuration.run do |navigation|
     primary.item :domain_blocks, safe_join([fa_icon('lock fw'), 'Domain Blocks']), admin_domain_blocks_url
     primary.item :sidekiq, safe_join([fa_icon('diamond fw'), 'Sidekiq']), sidekiq_url
     primary.item :pghero, safe_join([fa_icon('database fw'), 'PgHero']), pghero_url
+    primary.item :settings, safe_join([fa_icon('cogs fw'), 'Site Settings']), admin_settings_url
   end
 end

config/routes.rb

@@ -58,6 +58,7 @@ Rails.application.routes.draw do
   namespace :admin do
     resources :pubsubhubbub, only: [:index]
     resources :domain_blocks, only: [:index, :create]
+    resources :settings, only: [:index, :update]
 
     resources :accounts, only: [:index, :show, :update] do
       member do

config/settings.yml

@@ -0,0 +1,23 @@
+# config/app.yml for rails-settings-cached
+defaults: &defaults
+  site_description: ''
+  site_contact_username: ''
+  site_contact_email: ''
+  notification_emails:
+    follow: false
+    reblog: false
+    favourite: false
+    mention: false
+    follow_request: true
+  interactions:
+    must_be_follower: false
+    must_be_following: false
+
+development:
+  <<: *defaults
+
+test:
+  <<: *defaults
+
+production:
+  <<: *defaults

db/migrate/20170112154826_migrate_settings.rb

@@ -0,0 +1,19 @@
+class MigrateSettings < ActiveRecord::Migration
+  def up
+    remove_index :settings, [:target_type, :target_id, :var]
+    rename_column :settings, :target_id, :thing_id
+    rename_column :settings, :target_type, :thing_type
+    change_column :settings, :thing_id, :integer, null: true, default: nil
+    change_column :settings, :thing_type, :string, null: true, default: nil
+    add_index :settings, [:thing_type, :thing_id, :var], unique: true
+  end
+
+  def down
+    remove_index :settings, [:thing_type, :thing_id, :var]
+    rename_column :settings, :thing_id, :target_id
+    rename_column :settings, :thing_type, :target_type
+    change_column :settings, :target_id, :integer, null: false
+    change_column :settings, :target_type, :string, null: false, default: ''
+    add_index :settings, [:target_type, :target_id, :var], unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170109120109) do
+ActiveRecord::Schema.define(version: 20170112154826) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -240,11 +240,11 @@ ActiveRecord::Schema.define(version: 20170109120109) do
   create_table "settings", force: :cascade do |t|
     t.string   "var",        null: false
     t.text     "value"
-    t.string   "target_type", null: false
-    t.integer  "target_id",   null: false
+    t.string   "thing_type"
+    t.integer  "thing_id"
     t.datetime "created_at"
     t.datetime "updated_at"
-    t.index ["target_type", "target_id", "var"], name: "index_settings_on_target_type_and_target_id_and_var", unique: true, using: :btree
+    t.index ["thing_type", "thing_id", "var"], name: "index_settings_on_thing_type_and_thing_id_and_var", unique: true, using: :btree
   end
 
   create_table "statuses", force: :cascade do |t|