Add server rules (#15769)

config/locales/en.yml

@@ -26,6 +26,8 @@ en:
       It is used for federation purposes and should not be blocked unless you want to block the whole instance, in which case you should use a domain block.
     learn_more: Learn more
     privacy_policy: Privacy policy
+    rules: Server rules
+    rules_html: 'Below is a summary of rules you need to follow if you want to have an account on this server of Mastodon:'
     see_whats_happening: See what's happening
     server_stats: 'Server stats:'
     source_code: Source code
@@ -542,6 +544,11 @@ en:
       unassign: Unassign
       unresolved: Unresolved
       updated_at: Updated
+    rules:
+      add_new: Add rule
+      description: While most claim to have read and agree to the terms of service, usually people do not read through until after a problem arises. Make it easier to see your server's rules at a glance by providing them in a flat bullet point list. Try to keep individual rules short and simple, but try not to split them up into many separate items either.
+      edit: Edit rule
+      title: Server rules
     settings:
       activity_api_enabled:
         desc_html: Counts of locally posted statuses, active users, and new registrations in weekly buckets

config/locales/simple_form.en.yml

@@ -73,6 +73,8 @@ en:
           no_access: Block access to all resources
           sign_up_requires_approval: New sign-ups will require your approval
         severity: Choose what will happen with requests from this IP
+      rule:
+        text: Describe a rule or requirement for users on this server. Try to keep it short and simple
       sessions:
         otp: 'Enter the two-factor code generated by your phone app or use one of your recovery codes:'
         webauthn: If it's an USB key be sure to insert it and, if necessary, tap it.
@@ -197,6 +199,8 @@ en:
         reblog: Someone boosted your status
         report: New report is submitted
         trending_tag: An unreviewed hashtag is trending
+      rule:
+        text: Rule
       tag:
         listable: Allow this hashtag to appear in searches and on the profile directory
         name: Hashtag

config/navigation.rb

@@ -47,6 +47,7 @@ SimpleNavigation::Configuration.run do |navigation|
     n.item :admin, safe_join([fa_icon('cogs fw'), t('admin.title')]), admin_dashboard_url, if: proc { current_user.staff? } do |s|
       s.item :dashboard, safe_join([fa_icon('tachometer fw'), t('admin.dashboard.title')]), admin_dashboard_url
       s.item :settings, safe_join([fa_icon('cogs fw'), t('admin.settings.title')]), edit_admin_settings_url, if: -> { current_user.admin? }, highlights_on: %r{/admin/settings}
+      s.item :rules, safe_join([fa_icon('gavel fw'), t('admin.rules.title')]), admin_rules_path, highlights_on: %r{/admin/rules}
       s.item :announcements, safe_join([fa_icon('bullhorn fw'), t('admin.announcements.title')]), admin_announcements_path, highlights_on: %r{/admin/announcements}
       s.item :custom_emojis, safe_join([fa_icon('smile-o fw'), t('admin.custom_emojis.title')]), admin_custom_emojis_url, highlights_on: %r{/admin/custom_emojis}
       s.item :relays, safe_join([fa_icon('exchange fw'), t('admin.relays.title')]), admin_relays_url, if: -> { current_user.admin? && !whitelist_mode? }, highlights_on: %r{/admin/relays}

config/routes.rb

@@ -220,6 +220,7 @@ Rails.application.routes.draw do
     end
 
     resources :instances, only: [:index, :show], constraints: { id: /[^\/]+/ }
+    resources :rules
 
     resources :reports, only: [:index, :show] do
       member do
@@ -405,6 +406,7 @@ Rails.application.routes.draw do
       resource :instance, only: [:show] do
         resources :peers, only: [:index], controller: 'instances/peers'
         resource :activity, only: [:show], controller: 'instances/activity'
+        resources :rules, only: [:index], controller: 'instances/rules'
       end
 
       resource :domain_blocks, only: [:show, :create, :destroy]