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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Log
* @subpackage Writer
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Mail.php 16219 2009-06-21 19:45:39Z thomas $
*/
/** Zend_Log_Writer_Abstract */
require_once 'Zend/Log/Writer/Abstract.php';
/** Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
/** Zend_Log_Formatter_Simple*/
require_once 'Zend/Log/Formatter/Simple.php';
/**
* Class used for writing log messages to email via Zend_Mail.
*
* Allows for emailing log messages at and above a certain level via a
* Zend_Mail object. Note that this class only sends the email upon
* completion, so any log entries accumulated are sent in a single email.
*
* @category Zend
* @package Zend_Log
* @subpackage Writer
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Mail.php 16219 2009-06-21 19:45:39Z thomas $
*/
class Zend_Log_Writer_Mail extends Zend_Log_Writer_Abstract
{
/**
* Array of formatted events to include in message body.
*
* @var array
*/
protected $_eventsToMail = array();
/**
* Array of formatted lines for use in an HTML email body; these events
* are formatted with an optional formatter if the caller is using
* Zend_Layout.
*
* @var array
*/
protected $_layoutEventsToMail = array();
/**
* Zend_Mail instance to use
*
* @var Zend_Mail
*/
protected $_mail;
/**
* Zend_Layout instance to use; optional.
*
* @var Zend_Layout
*/
protected $_layout;
/**
* Optional formatter for use when rendering with Zend_Layout.
*
* @var Zend_Log_Formatter_Interface
*/
protected $_layoutFormatter;
/**
* Array keeping track of the number of entries per priority level.
*
* @var array
*/
protected $_numEntriesPerPriority = array();
/**
* Subject prepend text.
*
* Can only be used of the Zend_Mail object has not already had its
* subject line set. Using this will cause the subject to have the entry
* counts per-priority level appended to it.
*
* @var string|null
*/
protected $_subjectPrependText;
/**
* Class constructor.
*
* Constructs the mail writer; requires a Zend_Mail instance, and takes an
* optional Zend_Layout instance. If Zend_Layout is being used,
* $this->_layout->events will be set for use in the layout template.
*
* @param Zend_Mail $mail Mail instance
* @param Zend_Layout $layout Layout instance; optional
* @return void
*/
public function __construct(Zend_Mail $mail, Zend_Layout $layout = null)
{
$this->_mail = $mail;
$this->_layout = $layout;
$this->_formatter = new Zend_Log_Formatter_Simple();
}
/**
* Places event line into array of lines to be used as message body.
*
* Handles the formatting of both plaintext entries, as well as those
* rendered with Zend_Layout.
*
* @param array $event Event data
* @return void
*/
protected function _write($event)
{
// Track the number of entries per priority level.
if (!isset($this->_numEntriesPerPriority[$event['priorityName']])) {
$this->_numEntriesPerPriority[$event['priorityName']] = 1;
} else {
$this->_numEntriesPerPriority[$event['priorityName']]++;
}
$formattedEvent = $this->_formatter->format($event);
// All plaintext events are to use the standard formatter.
$this->_eventsToMail[] = $formattedEvent;
// If we have a Zend_Layout instance, use a specific formatter for the
// layout if one exists. Otherwise, just use the event with its
// default format.
if ($this->_layout) {
if ($this->_layoutFormatter) {
$this->_layoutEventsToMail[] =
$this->_layoutFormatter->format($event);
} else {
$this->_layoutEventsToMail[] = $formattedEvent;
}
}
}
/**
* Gets instance of Zend_Log_Formatter_Instance used for formatting a
* message using Zend_Layout, if applicable.
*
* @return Zend_Log_Formatter_Interface|null The formatter, or null.
*/
public function getLayoutFormatter()
{
return $this->_layoutFormatter;
}
/**
* Sets a specific formatter for use with Zend_Layout events.
*
* Allows use of a second formatter on lines that will be rendered with
* Zend_Layout. In the event that Zend_Layout is not being used, this
* formatter cannot be set, so an exception will be thrown.
*
* @param Zend_Log_Formatter_Interface $formatter
* @return Zend_Log_Writer_Mail
* @throws Zend_Log_Exception
*/
public function setLayoutFormatter(Zend_Log_Formatter_Interface $formatter)
{
if (!$this->_layout) {
throw new Zend_Log_Exception(
'cannot set formatter for layout; ' .
'a Zend_Layout instance is not in use');
}
$this->_layoutFormatter = $formatter;
return $this;
}
/**
* Allows caller to have the mail subject dynamically set to contain the
* entry counts per-priority level.
*
* Sets the text for use in the subject, with entry counts per-priority
* level appended to the end. Since a Zend_Mail subject can only be set
* once, this method cannot be used if the Zend_Mail object already has a
* subject set.
*
* @param string $subject Subject prepend text.
* @return Zend_Log_Writer_Mail
*/
public function setSubjectPrependText($subject)
{
if ($this->_mail->getSubject()) {
throw new Zend_Log_Exception(
'subject already set on mail; ' .
'cannot set subject prepend text');
}
$this->_subjectPrependText = (string) $subject;
return $this;
}
/**
* Sends mail to recipient(s) if log entries are present. Note that both
* plaintext and HTML portions of email are handled here.
*
* @return void
*/
public function shutdown()
{
// If there are events to mail, use them as message body. Otherwise,
// there is no mail to be sent.
if (empty($this->_eventsToMail)) {
return;
}
if ($this->_subjectPrependText !== null) {
// Tack on the summary of entries per-priority to the subject
// line and set it on the Zend_Mail object.
$numEntries = $this->_getFormattedNumEntriesPerPriority();
$this->_mail->setSubject(
"{$this->_subjectPrependText} ({$numEntries})");
}
// Always provide events to mail as plaintext.
$this->_mail->setBodyText(implode('', $this->_eventsToMail));
// If a Zend_Layout instance is being used, set its "events"
// value to the lines formatted for use with the layout.
if ($this->_layout) {
// Set the required "messages" value for the layout. Here we
// are assuming that the layout is for use with HTML.
$this->_layout->events =
implode('', $this->_layoutEventsToMail);
// If an exception occurs during rendering, convert it to a notice
// so we can avoid an exception thrown without a stack frame.
try {
$this->_mail->setBodyHtml($this->_layout->render());
} catch (Exception $e) {
trigger_error(
"exception occurred when rendering layout; " .
"unable to set html body for message; " .
"message = {$e->getMessage()}; " .
"code = {$e->getCode()}; " .
"exception class = " . get_class($e),
E_USER_NOTICE);
}
}
// Finally, send the mail. If an exception occurs, convert it into a
// warning-level message so we can avoid an exception thrown without a
// stack frame.
try {
$this->_mail->send();
} catch (Exception $e) {
trigger_error(
"unable to send log entries via email; " .
"message = {$e->getMessage()}; " .
"code = {$e->getCode()}; " .
"exception class = " . get_class($e),
E_USER_WARNING);
}
}
/**
* Gets a string of number of entries per-priority level that occurred, or
* an emptry string if none occurred.
*
* @return string
*/
protected function _getFormattedNumEntriesPerPriority()
{
$strings = array();
foreach ($this->_numEntriesPerPriority as $priority => $numEntries) {
$strings[] = "{$priority}={$numEntries}";
}
return implode(', ', $strings);
}
}
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