Adding remote follow button

Gemfile.lock

@@ -39,7 +39,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.5.0)
+      public_suffix (~> 2.0, >= 2.0.2)
     arel (7.1.4)
     ast (2.3.0)
     autoprefixer-rails (6.5.0.2)
@@ -98,7 +99,7 @@ GEM
       warden (~> 1.2.3)
     diff-lcs (1.2.5)
     docile (1.1.5)
-    domain_name (0.5.20160826)
+    domain_name (0.5.20161129)
       unf (>= 0.0.5, < 1.0.0)
     doorkeeper (4.2.0)
       railties (>= 4.2)
@@ -121,7 +122,7 @@ GEM
       ruby-progressbar (~> 1.4)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
-    goldfinger (1.1.0)
+    goldfinger (1.1.2)
       addressable (~> 2.4)
       http (~> 2.0)
       nokogiri (~> 1.6)
@@ -138,7 +139,7 @@ GEM
     highline (1.7.8)
     hiredis (0.6.1)
     htmlentities (4.3.4)
-    http (2.0.3)
+    http (2.1.0)
       addressable (~> 2.3)
       http-cookie (~> 1.0)
       http-form_data (~> 1.0.1)
@@ -226,6 +227,7 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
+    public_suffix (2.0.4)
     puma (3.6.0)
     rabl (0.13.1)
       activesupport (>= 2.3.14)

app/assets/javascripts/components/features/account/components/header.jsx

@@ -61,10 +61,10 @@ const Header = React.createClass({
     const displayNameHTML = { __html: emojify(escapeTextContentForBrowser(displayName)) };
 
     return (
-      <div style={{ flex: '0 0 auto', background: '#2f3441', textAlign: 'center', backgroundImage: `url(${account.get('header')})`, backgroundSize: 'cover', backgroundPosition: 'center', position: 'relative' }}>
+      <div className='account__header' style={{ flex: '0 0 auto', background: '#2f3441', textAlign: 'center', backgroundImage: `url(${account.get('header')})`, backgroundSize: 'cover', backgroundPosition: 'center', position: 'relative' }}>
         <div style={{ background: 'rgba(47, 52, 65, 0.9)', padding: '20px 10px' }}>
           <a href={account.get('url')} target='_blank' rel='noopener' style={{ display: 'block', color: 'inherit', textDecoration: 'none' }}>
-            <div style={{ width: '90px', margin: '0 auto', marginBottom: '10px' }}>
+            <div className='account__header__avatar' style={{ width: '90px', margin: '0 auto', marginBottom: '10px' }}>
               <img src={account.get('avatar')} alt='' style={{ display: 'block', width: '90px', height: '90px', borderRadius: '90px' }} />
             </div>
 

app/assets/stylesheets/components.scss

@@ -147,6 +147,12 @@
   }
 }
 
+@media screen and (max-height: 800px) {
+  .account__header__avatar, .account__header__content {
+    display: none;
+  }
+}
+
 .account__header__content {
   word-wrap: break-word;
   font-weight: 300;

app/controllers/remote_follow_controller.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+class RemoteFollowController < ApplicationController
+  layout 'public'
+
+  before_action :set_account
+  before_action :check_account_suspension
+
+  def new
+    @remote_follow = RemoteFollow.new
+  end
+
+  def create
+    @remote_follow = RemoteFollow.new(resource_params)
+
+    if @remote_follow.valid?
+      resource          = Goldfinger.finger("acct:#{@remote_follow.acct}")
+      redirect_url_link = resource&.link('http://ostatus.org/schema/1.0/subscribe')
+
+      if redirect_url_link.nil? || redirect_url_link.template.nil?
+        @remote_follow.errors.add(:acct, I18n.t('remote_follow.missing_resource'))
+        render(:new) && return
+      end
+
+      redirect_to Addressable::Template.new(redirect_url_link.template).expand(uri: "acct:#{@account.username}@#{Rails.configuration.x.local_domain}").to_s
+    else
+      render :new
+    end
+  rescue Goldfinger::Error
+    @remote_follow.errors.add(:acct, I18n.t('remote_follow.missing_resource'))
+    render :new
+  end
+
+  private
+
+  def resource_params
+    params.require(:remote_follow).permit(:acct)
+  end
+
+  def set_account
+    @account = Account.find_local!(params[:account_username])
+  end
+
+  def check_account_suspension
+    head 410 if @account.suspended?
+  end
+end

app/models/remote_follow.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class RemoteFollow
+  include ActiveModel::Validations
+
+  attr_accessor :acct
+
+  validates :acct, presence: true
+
+  def initialize(attrs = {})
+    @acct = attrs[:acct]
+  end
+end

app/views/accounts/_header.html.haml

@@ -5,7 +5,10 @@
         = link_to t('accounts.unfollow'), unfollow_account_path(@account), data: { method: :post }, class: 'button'
       - else
         = link_to t('accounts.follow'), follow_account_path(@account), data: { method: :post }, class: 'button'
-
+  - else
+    .controls
+      .remote-follow
+        = link_to t('accounts.remote_follow'), account_remote_follow_path(@account), class: 'button'
   .avatar= image_tag @account.avatar.url(:original)
   %h1.name
     = display_name(@account)

app/views/authorize_follow/_card.html.haml

@@ -0,0 +1,11 @@
+.account-card
+  .detailed-status__display-name
+    %div
+      = image_tag account.avatar.url(:original), alt: '', width: 48, height: 48, class: 'avatar'
+
+    %span.display-name
+      %strong= display_name(account)
+      %span= "@#{account.acct}"
+
+  - unless account.note.blank?
+    .account__header__content= Formatter.instance.simplified_format(account)

app/views/authorize_follow/new.html.haml

@@ -5,17 +5,7 @@
   .follow-prompt
     %h2= t('authorize_follow.prompt_html', self: current_account.username)
 
-    .account-card
+    = render partial: 'card', locals: { account: @account }
-      .detailed-status__display-name
-        %div
-          = image_tag @account.avatar.url(:original), alt: '', width: 48, height: 48, class: 'avatar'
-
-        %span.display-name
-          %strong= display_name(@account)
-          %span= "@#{@account.acct}"
-
-      - unless @account.note.blank?
-        .account__header__content= Formatter.instance.simplified_format(@account)
 
   = form_tag authorize_follow_path, method: :post, class: 'simple_form' do
     = hidden_field_tag :acct, @account.acct

app/views/remote_follow/new.html.haml

@@ -0,0 +1,13 @@
+.form-container
+  .follow-prompt
+    %h2= t('remote_follow.prompt')
+
+    = render partial: 'authorize_follow/card', locals: { account: @account }
+
+  = simple_form_for @remote_follow, as: :remote_follow, url: account_remote_follow_path(@account) do |f|
+    = render 'shared/error_messages', object: @remote_follow
+
+    = f.input :acct, placeholder: t('remote_follow.acct')
+
+    .actions
+      = f.button :button, t('remote_follow.proceed'), type: :submit

config/locales/en.yml

@@ -14,6 +14,7 @@ en:
     people_followed_by: People whom %{name} follows
     people_who_follow: People who follow %{name}
     posts: Posts
+    remote_follow: Remote follow
     unfollow: Unfollow
   application_mailer:
     signature: Mastodon notifications from %{instance}
@@ -71,6 +72,11 @@ en:
   pagination:
     next: Next
     prev: Prev
+  remote_follow:
+    acct: Enter your username@domain you want to follow from
+    missing_resource: Could not find the required redirect URL for your account
+    proceed: Proceed to follow
+    prompt: 'You are going to follow:'
   settings:
     edit_profile: Edit profile
     preferences: Preferences

config/routes.rb

@@ -31,6 +31,9 @@ Rails.application.routes.draw do
       end
     end
 
+    get :remote_follow,  to: 'remote_follow#new'
+    post :remote_follow, to: 'remote_follow#create'
+
     member do
       get :followers
       get :following