action.php

<?php
/**
 * DokuWiki Plugin Slack Notifier (Action Component)
 *
 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
 *
 */

if (!defined('DOKU_INC')) die();

require_once (DOKU_INC.'inc/changelog.php');

if (!defined('DOKU_LF')) define('DOKU_LF', "\n");
if (!defined('DOKU_TAB')) define('DOKU_TAB', "\t");
if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');

class action_plugin_slacknotifier extends DokuWiki_Action_Plugin {

	function register(Doku_Event_Handler $controller) {
		$controller->register_hook('ACTION_ACT_PREPROCESS', 'BEFORE', $this, 'handle_action_act_preprocess');
	}

	function handle_action_act_preprocess(Doku_Event $event, $param) {
		if (isset($event->data['save'])) {
			$this->handle();
		}
		return;
	}

	private function handle() {

		global $conf;
		global $ID;
		global $INFO;
		global $SUM;

		// filter by namespaces
		$ns = $this->getConf('namespaces');
		if (!empty($ns)) {
			$namespaces = explode(',', $ns);
			$current_namespace = explode(':', $INFO['namespace']);
			if (!in_array($current_namespace[0], $namespaces)) {
				return;
			}
		}

		// title
		$fullname = $INFO['userinfo']['name'];
		$page     = $INFO['namespace'] . $INFO['id'];
		$title    = "{$fullname} updated page <{$this->urlize()}|{$INFO['id']}>";

		// compare changes
		$changelog = new PageChangeLog($ID);
		$revArr = $changelog->getRevisions(-1, 1);
		if (count($revArr) == 1) {
			$title .= " (<{$this->urlize($revArr[0])}|Compare changes>)";
		}

		// text
                $data = array(
                        "text"                  =>  $title
                );

		// attachments
		if (!empty($SUM)) {
			$data['attachments'] = array(array(
                                "fallback"      => "Change summary",
				"title"		=> "Summary",
                                "text"          => "{$SUM}\n- {$fullname}"
			));
		}

		// encode data
		$json = json_encode($data);

		// init curl
		$webhook = $this->getConf('webhook');
		$ch = curl_init($webhook);

		// use proxy if defined
		$proxy = $conf['proxy'];		
		if (!empty($proxy['host'])) {

			// configure proxy address and port
			$proxyAddress = $proxy['host'] . ':' . $proxy['port'];

			curl_setopt($ch, CURLOPT_PROXY, $proxyAddress);
			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
			// TODO: may be required internally but best to add a config flag/path to local certificate file
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		
			// include username and password if defined
			if (!empty($proxy['user']) && !empty($proxy['pass'])) {
				$proxyAuth = $proxy['user'] . ':' . conf_decodeString($proxy['port']);
				curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyAuth);
			}

		}

		// submit payload
		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
		curl_setopt($ch, CURLOPT_POSTFIELDS, array('payload' => $json));
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$result = curl_exec($ch);

		// ideally display only for Admin users and/or in debugging mode
		if ($result === false){
			echo 'cURL error when posting Wiki save notification to Slack: ' . curl_error($ch);
		}

		// close curl		
		curl_close($ch);

	}

	private function urlize($diffRev=null) {

		global $conf;
		global $INFO;

		switch($conf['userewrite']) {
			case 0:
				if (!empty($diffRev)) {
                        		$url = DOKU_URL . "doku.php?id={$INFO['id']}&rev={$diffRev}&do=diff";
                		} else {
                        		$url = DOKU_URL . "doku.php?id={$INFO['id']}";
                		}
				break;
			case 1:
				$id = $INFO['id'];
				if ($conf['useslash']) {
					$id = str_replace(":", "/", $id);
				}
				if (!empty($diffRev)) {
                        		$url = DOKU_URL . "{$id}?rev={$diffRev}&do=diff";
                		} else {
                        		$url = DOKU_URL . $id;
                		}
				break;
			case 2:
				$id = $INFO['id'];
				if ($conf['useslash']) {
					$id = str_replace(":", "/", $id);
				}
				if (!empty($diffRev)) {
                        		$url = DOKU_URL . "doku.php/{$id}?rev={$diffRev}&do=diff";
                		} else {
                        		$url = DOKU_URL . "doku.php/{$id}";
                		}	
				break;
		}
		return $url;
	}
}

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