PhabricatorMetaMTAEmailBodyParser.php
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	<?php

	/*
	* Copyright 2012 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 PhabricatorMetaMTAEmailBodyParser {

	public function stripTextBody($body) {
	return $this->stripSignature($this->stripQuotedText($body));
	}

	private function stripQuotedText($body) {
	$body = preg_replace(
	'/^\sOn\b.\bwrote:.*?/msU',
	'',
	$body);

	// Outlook english
	$body = preg_replace(
	'/^\s-----Original Message-----.?/imsU',
	'',
	$body);

	// Outlook danish
	$body = preg_replace(
	'/^\s-----Oprindelig Meddelelse-----.?/imsU',
	'',
	$body);

	return rtrim($body);
	}

	private function stripSignature($body) {
	// Quasi-"standard" delimiter, for lols see:
	// https://bugzilla.mozilla.org/show_bug.cgi?id=58406
	$body = preg_replace(
	'/^-- +$.*/sm',
	'',
	$body);

	// HTC Mail application (mobile)
	$body = preg_replace(
	'/^\s^Sent from my HTC smartphone./sm',
	'',
	$body);

	// Apple iPhone
	$body = preg_replace(
	'/^\s^Sent from my iPhone\s$.*/sm',
	'',
	$body);

	return rtrim($body);
	}

	}