fixes #547

app/assets/javascripts/artists.js

@@ -0,0 +1,30 @@
+(function() {
+  Danbooru.Artist = {};
+  
+  Danbooru.Artist.initialize_all = function() {
+    if ($("#c-artists").length) {
+      Danbooru.Artist.initialize_check_name_link();
+    }
+  }
+  
+  Danbooru.Artist.initialize_check_name_link = function() {
+    $("#check-name-link").click(function(e) {
+      var artist_name = $("#artist_name").val();
+      $.get("/artists.json?name=" + artist_name,
+        function(data) {
+          if (data.length) {
+            $("#check-name-result").html("Taken")
+          } else {
+            $("#check-name-result").html("OK")
+          }
+        }
+      );
+      e.preventDefault();
+    });
+  }
+})();
+
+
+$(document).ready(function() {
+  Danbooru.Artist.initialize_all();
+});

app/controllers/artists_controller.rb

@@ -25,7 +25,7 @@ class ArtistsController < ApplicationController
   end
   
   def index
-    @artists = Artist.search(params[:search]).order("id desc").paginate(params[:page])
+    @artists = Artist.search(params[:search] || params).order("id desc").paginate(params[:page])
     respond_with(@artists) do |format|
       format.xml do
         render :xml => @artists.to_xml(:include => [:urls])

app/views/artists/_form.html.erb

@@ -1,5 +1,10 @@
 <%= simple_form_for(@artist) do |f| %>
-  <%= f.input :name %>
+  <div class="input">
+    <label for="artist_name">Name</label>
+    <%= text_field "artist", "name" %>
+    [<%= link_to "check", "#", :id => "check-name-link" %>]
+    <span id="check-name-result"></span>
+  </div>
   <%= f.input :other_names_comma, :hint => "Separate with commas", :as => :text, :label => "Other names" %>
   <%= f.input :group_name %>
   <%= f.input :url_string, :label => "URLs", :as => :text, :input_html => {:size => "50x5"} %>