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<?php
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog\Handler;
use Monolog\Logger;
use Monolog\Formatter\LineFormatter;
/**
* Sends notifications through Slack API
*
* @author Greg Kedzierski <greg@gregkedzierski.com>
* @see https://api.slack.com/
*/
class SlackHandler extends SocketHandler
{
/**
* Slack API token
* @var string
*/
private $token;
/**
* Slack channel (encoded ID or name)
* @var string
*/
private $channel;
/**
* Name of a bot
* @var string
*/
private $username;
/**
* Emoji icon name
* @var string
*/
private $iconEmoji;
/**
* Whether the message should be added to Slack as attachment (plain text otherwise)
* @var bool
*/
private $useAttachment;
/**
* Whether the the context/extra messages added to Slack as attachments are in a short style
* @var bool
*/
private $useShortAttachment;
/**
* Whether the attachment should include context and extra data
* @var bool
*/
private $includeContextAndExtra;
/**
* @var LineFormatter
*/
private $lineFormatter;
/**
* @param string $token Slack API token
* @param string $channel Slack channel (encoded ID or name)
* @param string $username Name of a bot
* @param bool $useAttachment Whether the message should be added to Slack as attachment (plain text otherwise)
* @param string|null $iconEmoji The emoji name to use (or null)
* @param int $level The minimum logging level at which this handler will be triggered
* @param bool $bubble Whether the messages that are handled can bubble up the stack or not
* @param bool $useShortAttachment Whether the the context/extra messages added to Slack as attachments are in a short style
* @param bool $includeContextAndExtra Whether the attachment should include context and extra data
*/
public function __construct($token, $channel, $username = 'Monolog', $useAttachment = true, $iconEmoji = null, $level = Logger::CRITICAL, $bubble = true, $useShortAttachment = false, $includeContextAndExtra = false)
{
if (!extension_loaded('openssl')) {
throw new MissingExtensionException('The OpenSSL PHP extension is required to use the SlackHandler');
}
parent::__construct('ssl://slack.com:443', $level, $bubble);
$this->token = $token;
$this->channel = $channel;
$this->username = $username;
$this->iconEmoji = trim($iconEmoji, ':');
$this->useAttachment = $useAttachment;
$this->useShortAttachment = $useShortAttachment;
$this->includeContextAndExtra = $includeContextAndExtra;
if ($this->includeContextAndExtra) {
$this->lineFormatter = new LineFormatter;
}
}
/**
* {@inheritdoc}
*
* @param array $record
* @return string
*/
protected function generateDataStream($record)
{
$content = $this->buildContent($record);
return $this->buildHeader($content) . $content;
}
/**
* Builds the body of API call
*
* @param array $record
* @return string
*/
private function buildContent($record)
{
$dataArray = $this->prepareContentData($record);
return http_build_query($dataArray);
}
/**
* Prepares content data
*
* @param array $record
* @return array
*/
protected function prepareContentData($record)
{
$dataArray = array(
'token' => $this->token,
'channel' => $this->channel,
'username' => $this->username,
'text' => '',
'attachments' => array()
);
if ($this->useAttachment) {
$attachment = array(
'fallback' => $record['message'],
'color' => $this->getAttachmentColor($record['level'])
);
if ($this->useShortAttachment) {
$attachment['fields'] = array(
array(
'title' => $record['level_name'],
'value' => $record['message'],
'short' => false
)
);
} else {
$attachment['fields'] = array(
array(
'title' => 'Message',
'value' => $record['message'],
'short' => false
),
array(
'title' => 'Level',
'value' => $record['level_name'],
'short' => true
)
);
}
if ($this->includeContextAndExtra) {
if (!empty($record['extra'])) {
if ($this->useShortAttachment) {
$attachment['fields'][] = array(
'title' => "Extra",
'value' => $this->stringify($record['extra']),
'short' => $this->useShortAttachment
);
} else {
// Add all extra fields as individual fields in attachment
foreach ($record['extra'] as $var => $val) {
$attachment['fields'][] = array(
'title' => $var,
'value' => $val,
'short' => $this->useShortAttachment
);
}
}
}
if (!empty($record['context'])) {
if ($this->useShortAttachment) {
$attachment['fields'][] = array(
'title' => "Context",
'value' => $this->stringify($record['context']),
'short' => $this->useShortAttachment
);
} else {
// Add all context fields as individual fields in attachment
foreach ($record['context'] as $var => $val) {
$attachment['fields'][] = array(
'title' => $var,
'value' => $val,
'short' => $this->useShortAttachment
);
}
}
}
}
$dataArray['attachments'] = json_encode(array($attachment));
} else {
$dataArray['text'] = $record['message'];
}
if ($this->iconEmoji) {
$dataArray['icon_emoji'] = ":{$this->iconEmoji}:";
}
return $dataArray;
}
/**
* Builds the header of the API Call
*
* @param string $content
* @return string
*/
private function buildHeader($content)
{
$header = "POST /api/chat.postMessage HTTP/1.1\r\n";
$header .= "Host: slack.com\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($content) . "\r\n";
$header .= "\r\n";
return $header;
}
/**
* {@inheritdoc}
*
* @param array $record
*/
protected function write(array $record)
{
parent::write($record);
$this->closeSocket();
}
/**
* Returned a Slack message attachment color associated with
* provided level.
*
* @param int $level
* @return string
*/
protected function getAttachmentColor($level)
{
switch (true) {
case $level >= Logger::ERROR:
return 'danger';
case $level >= Logger::WARNING:
return 'warning';
case $level >= Logger::INFO:
return 'good';
default:
return '#e3e4e6';
}
}
/**
* Stringifies an array of key/value pairs to be used in attachment fields
*
* @param array $fields
* @access protected
* @return string
*/
protected function stringify($fields)
{
$string = '';
foreach ($fields as $var => $val) {
$string .= $var.': '.$this->lineFormatter->stringify($val)." | ";
}
$string = rtrim($string, " |");
return $string;
}
}