add updateContacts endpoint

lib/bronto/contact.rb

@@ -37,6 +37,25 @@ def self.save(*objs)
       objs
     end
 
+    def self.update(*objs)
+      objs = objs.flatten
+      api_key = objs.first.is_a?(String) ? objs.shift : self.api_key
+
+      resp = request(:update, {plural_class_name => objs.map(&:to_hash)})
+
+      objs.each { |o| o.errors.clear }
+
+      Array.wrap(resp[:return][:results]).each_with_index do |result, i|
+        if result[:is_error]
+          objs[i].errors.add(result[:error_code], result[:error_string])
+        else
+          objs[i].id = result[:id]
+        end
+      end
+
+      objs
+    end
+
     def initialize(options = {})
       self.fields = {}
       fields = options.delete(:fields)
@@ -65,11 +84,10 @@ def save
     end
 
     def to_hash
-      if id.present?
-        { id: id, email: email, fields: fields.values.map(&:to_hash) }
-      else
-        { email: email, fields: fields.values.map(&:to_hash) }
-      end
+      obj = { email: email, fields: fields.values.map(&:to_hash) }
+      obj.merge!(id: id) if id.present?
+      obj.merge!(status: status) if status.present?
+      obj
     end
 
     def set_field(field, value)

test/contact_test.rb

@@ -19,6 +19,16 @@ class ContactTest < Test::Unit::TestCase
       assert_equal 0, @contact.errors.count
     end
 
+    should "update contact status" do
+      assert_equal nil, @contact.id
+
+      @contact.status = 'unsub'
+      @contact.update
+
+      assert_not_nil @contact.id
+      assert_equal 0, @contact.errors.count
+    end
+
     should "destroy a contact" do
       @contact.save