From e2fbf8bc7479967baa84ef26eb03e19f0fd868e8 Mon Sep 17 00:00:00 2001
From: Evan Minto <evan.minto@gmail.com>
Date: Sat, 4 Feb 2017 14:46:23 -0800
Subject: [PATCH] Add an account endpoint for ActivityPub and link to it on
 HTML profile pages

---
 .../api/activitypub/accounts_controller.rb    | 20 +++++++++++++++++++
 app/views/accounts/show.html.haml             |  1 +
 app/views/api/activitypub/accounts/show.rabl  | 10 ++++++++++
 config/routes.rb                              |  6 ++++++
 4 files changed, 37 insertions(+)
 create mode 100644 app/controllers/api/activitypub/accounts_controller.rb
 create mode 100644 app/views/api/activitypub/accounts/show.rabl

diff --git a/app/controllers/api/activitypub/accounts_controller.rb b/app/controllers/api/activitypub/accounts_controller.rb
new file mode 100644
index 00000000..efb6413a
--- /dev/null
+++ b/app/controllers/api/activitypub/accounts_controller.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class Api::Activitypub::AccountsController < ApiController
+  before_action -> { doorkeeper_authorize! :read }, except: [:show]
+  before_action :require_user!, except: [:show]
+  before_action :set_account, except: [:verify_credentials, :suggestions, :search]
+
+  respond_to :'application/activity+json'
+  respond_to :'application/ld+json; profile="https://www.w3.org/ns/activitystreams#"'
+
+  def show
+    render content_type: :'application/ld+json; profile="https://www.w3.org/ns/activitystreams#"'
+  end
+
+  private
+
+  def set_account
+    @account = Account.find(params[:id])
+  end
+end
diff --git a/app/views/accounts/show.html.haml b/app/views/accounts/show.html.haml
index c194ce33..cd539890 100644
--- a/app/views/accounts/show.html.haml
+++ b/app/views/accounts/show.html.haml
@@ -4,6 +4,7 @@
 - content_for :header_tags do
   %link{ rel: 'salmon', href: api_salmon_url(@account.id) }/
   %link{ rel: 'alternate', type: 'application/atom+xml', href: account_url(@account, format: 'atom') }/
+  %link{ rel: 'alternate', type: 'application/ld+json; profile="https://www.w3.org/ns/activitystreams#"', href: "http://mastodon.dev/api/v1/activitypub/accounts/#{@account.username}" }/
 
   %meta{ property: 'og:site_name', content: 'Mastodon' }/
   %meta{ property: 'og:type', content: 'profile' }/
diff --git a/app/views/api/activitypub/accounts/show.rabl b/app/views/api/activitypub/accounts/show.rabl
new file mode 100644
index 00000000..806789d0
--- /dev/null
+++ b/app/views/api/activitypub/accounts/show.rabl
@@ -0,0 +1,10 @@
+object @account
+
+node(:'@context')         { 'https://www.w3.org/ns/activitystreams' }
+node(:type)               { 'Person' }
+node(:id)                 { request.original_url }
+node(:url)                { |account| TagManager.instance.url_for(account) }
+node(:name)               { |account| account.display_name }
+node(:preferredUsername)  { |account| account.username }
+node(:summary)            { |account| account.note }
+node(:icon)               { |account| full_asset_url(account.avatar.url(:original)) }
diff --git a/config/routes.rb b/config/routes.rb
index 699f5683..f831c423 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -153,6 +153,12 @@ Rails.application.routes.draw do
       end
     end
 
+    namespace :activitypub do
+      resources :accounts do
+        get '/:id', to: 'accounts#show'
+      end
+    end
+
     namespace :web do
       resource :settings, only: [:update]
     end