Fix #3941: Add ability to search users by inviter.

app/models/user.rb

@@ -757,10 +757,6 @@ class User < ApplicationRecord
       where("lower(name) = ?", name)
     end
 
-    def name_matches(name)
-      where("lower(name) like ? escape E'\\\\'", name.to_escaped_for_sql_like)
-    end
-
     def admins
       where("level = ?", Levels::ADMIN)
     end
@@ -794,12 +790,15 @@ class User < ApplicationRecord
     def search(params)
       q = super
 
-      if params[:name].present?
-        q = q.name_matches(params[:name].mb_chars.downcase.strip.tr(" ", "_"))
-      end
+      params = params.dup
+      params[:name_matches] = params.delete(:name) if params[:name].present?
 
       if params[:name_matches].present?
-        q = q.name_matches(params[:name_matches].mb_chars.downcase.strip.tr(" ", "_"))
+        q = q.where_ilike(:name, normalize_name(params[:name_matches]))
+      end
+
+      if params[:inviter].present?
+        q = q.where(inviter_id: search(params[:inviter]))
       end
 
       if params[:min_level].present?

app/presenters/user_presenter.rb

@@ -141,14 +141,6 @@ class UserPresenter
     end
   end
 
-  def inviter(template)
-    if user.inviter_id
-      template.link_to_user(user.inviter)
-    else
-      "None"
-    end
-  end
-
   def appeal_count(template)
     template.link_to(user.appeal_count, template.post_appeals_path(:search => {:creator_name => user.name}))
   end

app/views/users/_statistics.html.erb

@@ -9,7 +9,11 @@
 
       <tr>
         <th>Inviter</th>
-        <td><%= presenter.inviter(self) %></td>
+        <% if user.inviter %>
+          <td><%= link_to_user user.inviter %> <%= link_to "»", users_path(search: { inviter: { name: user.inviter.name }}) %></td>
+        <% else %>
+          <td>None</td>
+        <% end %>
       </tr>
 
       <tr>

app/views/users/search.html.erb

@@ -2,6 +2,9 @@
   <div id="a-search">
     <%= simple_form_for(:search, url: users_path, method: :get, defaults: { required: false }, html: { class: "inline-form" }) do |f| %>
       <%= f.input :name_matches, label: "Name", hint: "Use * for wildcard", input_html: { value: params[:search][:name_matches] } %>
+      <%= f.simple_fields_for :inviter do |sub| %>
+        <%= sub.input :name_matches, label: "Inviter Name", hint: "Use * for wildcard", input_html: { value: params.dig(:search, :inviter, :name_matches) } %>
+      <% end %>
 
       <%= f.input :level, collection: User.level_hash.to_a, include_blank: true, selected: params[:search][:level] %>
       <%= f.input :min_level, collection: User.level_hash.to_a, include_blank: true, selected: params[:search][:min_level] %>