users: allow mods to change the names of other users.

Allow moderators to forcibly change the username of other users. This is
so mods can change abusive or invalid usernames.

* A mod can only change the username of Builder-level users and below.
* The user can't change their own name again until one week has passed.
* A modaction is logged when a mod changes a user's name.
* A dmail is sent to the user notifying them of the change.
* The dmail does not send the user an email notification. This is so we
  don't spam users if their name is changed after they're banned, or if
  they haven't visited the site in a long time.

The rename button is on the user's profile page, and when you hover over
the user's name and open the "..." menu.

app/views/layouts/default.html.erb

@@ -160,7 +160,7 @@
     <% if !CurrentUser.user.is_anonymous? && CurrentUser.user.name_invalid? %>
       <div class="notice notice-error notice-large" id="invalid-name-notice">
         <h2>Action required </h2>
-        <div>You must <%= link_to "change your username", new_user_name_change_request_path %> to continue using <%= Danbooru.config.canonical_app_name %>.</div>
+        <div>You must <%= link_to "change your username", change_name_user_path(CurrentUser.user) %> to continue using <%= Danbooru.config.canonical_app_name %>.</div>
       </div>
     <% end %>
 

app/views/static/site_map.html.erb

@@ -131,9 +131,6 @@
         <% else %>
           <li><%= link_to "Profile", profile_path %></li>
           <li><%= link_to "Settings", settings_path %></li>
-          <% if policy(UserNameChangeRequest).create? %>
-            <li><%= link_to "Change name", new_user_name_change_request_path %></li>
-          <% end %>
           <li><%= link_to "Uploads", user_uploads_path(CurrentUser.user) %></li>
           <li><%= link_to "Dmails", dmails_path(search: { folder: "received" }) %></li>
           <li><%= link_to "Favorites", favorites_path %></li>

app/views/user_name_change_requests/_secondary_links.html.erb

@@ -1,5 +1,5 @@
 <% content_for(:secondary_links) do %>
   <%= subnav_link_to "Listing", user_name_change_requests_path %>
-  <%= subnav_link_to "New", new_user_name_change_request_path %>
+  <%= subnav_link_to "New", change_name_user_path(CurrentUser.user) unless CurrentUser.user.is_anonymous? %>
   <%= subnav_link_to "Help", wiki_page_path("help:user_name_change_requests") %>
 <% end %>

app/views/user_name_change_requests/new.html.erb

@@ -1,6 +1,10 @@
 <div id="c-user-name-change-requests">
   <div id="a-new" class="fixed-width-container">
-    <h1>Change Name</h1>
+    <% if CurrentUser.user != @change_request.user %>
+      <h1>Change Name: <%= link_to_user @change_request.user %></h1>
+    <% else %>
+      <h1>Change Name</h1>
+    <% end %>
 
     <% if CurrentUser.user.name_invalid? %>
       <p> Your current username is invalid. You must change your username to continue
@@ -26,6 +30,7 @@
     </div>
 
     <%= edit_form_for(@change_request) do |f| %>
+      <%= f.input :user_id, as: :hidden, input_html: { value: @change_request.user_id } %>
       <%= f.input :desired_name, label: "New name" %>
       <%= f.submit "Submit" %>
     <% end %>

app/views/user_name_change_requests/show.html.erb

@@ -8,7 +8,6 @@
           <th>Date</th>
           <td>
             <%= compact_time @change_request.created_at %>
-            <%= render "application/update_notice", record: @change_request %>
           </td>
         </tr>
         <tr>

app/views/users/_secondary_links.html.erb

@@ -27,6 +27,10 @@
       <%= subnav_link_to "Promote", edit_admin_user_path(@user) %>
     <% end %>
 
+    <% if policy(UserNameChangeRequest.new(user: @user)).can_rename_user? %>
+      <%= subnav_link_to "Rename", change_name_user_path(@user) %>
+    <% end %>
+
     <% if policy(Ban.new(user: @user)).create? %>
       <% if @user.is_banned? && @user.active_ban.present? %>
         <%= subnav_link_to "Unban", ban_path(@user.active_ban) %>

app/views/users/edit.html.erb

@@ -14,7 +14,7 @@
       <fieldset id="basic-settings-section">
         <div class="input">
           <label>Name</label>
-          <p><%= link_to "Change your name", new_user_name_change_request_path %></p>
+          <p><%= link_to "Change your name", change_name_user_path(@user) %></p>
         </div>
 
         <div class="input">

app/views/users/show.html+tooltip.erb

@@ -83,6 +83,14 @@
           <% end %>
         <% end %>
       <% end %>
+
+      <% if policy(UserNameChangeRequest.new(user: @user)).can_rename_user? %>
+        <% menu.item do %>
+          <%= link_to change_name_user_path(@user) do %>
+            <%= feedback_icon %> Rename User
+          <% end %>
+        <% end %>
+      <% end %>
     <% end %>
   </div>