Improve registrar area linked user switch

- Introduce profile
- Move linked users to profile
- Use PUT

#599

app/controllers/registrar/current_user_controller.rb

@@ -3,10 +3,16 @@ class Registrar
     skip_authorization_check
 
     def switch
-      new_user = ApiUser.find(params[:new_user_id])
-      sign_in(new_user) if new_user.identity_code == current_user.identity_code
+      raise 'Cannot switch to unlinked user' unless current_user.linked_with?(new_user)
 
+      sign_in(new_user)
       redirect_to :back, notice: t('.switched', new_user: new_user)
     end
+
+    private
+
+    def new_user
+      @new_user ||= ApiUser.find(params[:new_user_id])
+    end
   end
 end

app/controllers/registrar/profile_controller.rb

@@ -0,0 +1,17 @@
+class Registrar
+  class ProfileController < BaseController
+    skip_authorization_check
+
+    helper_method :linked_users
+
+    def show
+      @user = current_user
+    end
+
+    private
+
+    def linked_users
+      current_user.linked_users
+    end
+  end
+end

app/models/api_user.rb

@@ -23,9 +23,9 @@ class ApiUser < User
   validates :password, length: { minimum: min_password_length }
   validates :username, uniqueness: true
 
-  # TODO: probably cache, because it's requested on every EPP
-  delegate :code, to: :registrar, prefix: true
+  delegate :code, :name, to: :registrar, prefix: true
 
+  alias_attribute :login, :username
   attr_accessor :registrar_typeahead
 
   SUPER = 'super'
@@ -91,7 +91,11 @@ class ApiUser < User
 
   def linked_users
     self.class.where(identity_code: identity_code)
-      .where("identity_code is NOT NULL and identity_code != ''")
+      .where("identity_code IS NOT NULL AND identity_code != ''")
       .where.not(id: id)
   end
+
+  def linked_with?(another_api_user)
+    another_api_user.identity_code == self.identity_code
+  end
 end

app/presenters/user_presenter.rb

@@ -0,0 +1,19 @@
+class UserPresenter
+  def initialize(user:, view:)
+    @user = user
+    @view = view
+  end
+
+  def login_with_role
+    "#{user.login} (#{role_name}) - #{user.registrar_name}"
+  end
+
+  private
+
+  def role_name
+    user.roles.first
+  end
+
+  attr_reader :user
+  attr_reader :view
+end

app/views/registrar/base/_current_user.html.erb

@@ -1,3 +1,4 @@
-<%= "#{current_user} (#{current_user.roles.first}) - #{current_user.registrar}" %>
+<% current_user_presenter = UserPresenter.new(user: current_user, view: self) %>
+<%= link_to current_user_presenter.login_with_role, registrar_profile_path, id: 'registrar-profile-btn' %>
 <span class="text-muted">|</span>
 <%= link_to t('.sign_out'), registrar_destroy_user_session_path, method: :delete %>

app/views/registrar/profile/_linked_users.html.erb

@@ -0,0 +1,18 @@
+<div class="panel panel-default">
+    <div class="panel-heading"><%= t '.header' %></div>
+    <div class="panel-body">
+        <ul>
+            <% linked_users.each do |user| %>
+                <% user_presenter = UserPresenter.new(user: user, view: self) %>
+                <li><%= user_presenter.login_with_role %>
+                    <%= link_to t('.switch_btn'),
+                                registrar_switch_current_user_path(user),
+                                method: :put,
+                                id: "switch-current-user-#{user.id}-btn",
+                                class: 'btn btn-primary btn-xs' %>
+                </li>
+            <% end %>
+        </ul>
+    </div>
+</div>
+

app/views/registrar/profile/show.html.erb

@@ -0,0 +1,9 @@
+<div class="page-header">
+    <h1><%= t '.header' %></h1>
+</div>
+
+<div class="row">
+    <div class="col-sm-4">
+        <%= render 'linked_users', linked_users: linked_users %>
+    </div>
+</div>