testing

DifferentialTitleFieldSpecification.php
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			<?php

			/*
			* Copyright 2011 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			final class DifferentialTitleFieldSpecification
			extends DifferentialFieldSpecification {

			private $title;
			private $error = true;

			public function shouldAppearOnEdit() {
			$this->title = $this->getRevision()->getTitle();
			return true;
			}

			public function setValueFromRequest(AphrontRequest $request) {
			$this->title = $request->getStr('title');
			$this->error = null;
			return $this;
			}

			public function renderEditControl() {
			return id(new AphrontFormTextAreaControl())
			->setLabel('Title')
			->setName('title')
			->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_SHORT)
			->setError($this->error)
			->setValue($this->title);
			}

			public function willWriteRevision(DifferentialRevisionEditor $editor) {
			$this->getRevision()->setTitle($this->title);
			}

			public function validateField() {
			if (!strlen($this->title)) {
			$this->error = 'Required';
			throw new DifferentialFieldValidationException(
			"You must provide a title.");
			}
			}

			}