adding autocomplete controller and tests

git-svn-id: http://svn.barleysodas.com/barleysodas/trunk@36 0f7b21a7-9e3a-4941-bbeb-ce5c7c368fa7

app/controllers/autocomplete_controller.rb

@@ -0,0 +1,27 @@
+class AutocompleteController < ApplicationController
+  append_before_filter :ensure_xhr
+  
+  ##
+  # Automatically finds and returns a nice list of things. It is stupid in that
+  # it only finds the first thing available, but it will find it all.
+  #
+  # It expects to have parameters passed in the form:
+  #
+  #   'brewery' => { 'name' => 'foo' }
+  #
+  # Only one of those sets. If this is done, then all will be peachy.
+  #
+  def index
+    key = params.keys.detect do |x|
+      x.to_s != 'action' and x.to_s != 'controller'
+    end
+    render :nothing => true, :status => 500 if key.nil?
+    @value = params[key].keys.first
+    class_name = key.camelize.constantize
+    render :nothing => true unless class_name.new.respond_to?(@value)
+    @items = class_name.find(:all, :order => "#{@value} ASC", :select => @value,
+      :conditions => [ "lower(#{@value}) LIKE ?",
+        "%#{params[key][@value].downcase}%" ])
+    render :partial => 'autocomplete/results'
+  end
+end

app/helpers/autocomplete_helper.rb

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+module AutocompleteHelper
+end

app/views/autocomplete/_results.rhtml

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+<ul>
+<% if @items.empty? -%>
+  <li><strong>Ohtehnoz! No maches found!</strong></li>
+<% else -%>
+  <%= @items.collect { |x| "<li>#{x.send(@value)}</li>" } %>
+<% end -%>
+</ul>

test/functional/autocomplete_controller_test.rb

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+require File.dirname(__FILE__) + '/../test_helper'
+require 'autocomplete_controller'
+
+# Re-raise errors caught by the controller.
+class AutocompleteController; def rescue_action(e) raise e end; end
+
+class AutocompleteControllerTest < Test::Unit::TestCase
+  def setup
+    @controller = AutocompleteController.new
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+  end
+
+  # Replace this with your real tests.
+  def test_truth
+    assert true
+  end
+end