friendica-addons/windowsphonepush/windowsphonepush.php

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<?php
/**
* Name: WindowsPhonePush
* Description: Enable push notification to send information to Friendica Mobile app on Windows phone (count of unread timeline entries, text of last posting - if wished by user)
* Version: 2.0
* Author: Gerhard Seeber <http://friendica.seeber.at/profile/admin>
*
*
* Pre-requisite: Windows Phone mobile device (at least WP 7.0)
* Friendica mobile app on Windows Phone
*
* When addon is installed, the system calls the addon
* name_install() function, located in 'addon/name/name.php',
* where 'name' is the name of the addon.
* If the addon is removed from the configuration list, the
* system will call the name_uninstall() function.
*
* Version history:
* 1.1 : addon crashed on php versions >= 5.4 as of removed deprecated call-time
* pass-by-reference used in function calls within function windowsphonepush_content
* 2.0 : adaption for supporting emphasizing new entries in app (count on tile cannot be read out,
* so we need to retrieve counter through show_settings secondly). Provide new function for
* calling from app to set the counter back after start (if user starts again before cronjob
* sets the counter back
* count only unseen elements which are not type=activity (likes and dislikes not seen as new elements)
*/
use Friendica\App;
use Friendica\Content\Text\BBCode;
use Friendica\Content\Text\HTML;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
use Friendica\Database\DBA;
use Friendica\DI;
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use Friendica\Model\Item;
use Friendica\Model\Post;
use Friendica\Model\User;
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use Friendica\Network\HTTPException\UnauthorizedException;
function windowsphonepush_install()
{
/* Our addon will attach in three places.
* The first is within cron - so the push notifications will be
* sent every 10 minutes (or whatever is set in crontab).
*/
Hook::register('cron', 'addon/windowsphonepush/windowsphonepush.php', 'windowsphonepush_cron');
/* Then we'll attach into the addon settings page, and also the
* settings post hook so that we can create and update
* user preferences. User shall be able to activate the addon and
* define whether he allows pushing first characters of item text
*/
Hook::register('addon_settings', 'addon/windowsphonepush/windowsphonepush.php', 'windowsphonepush_settings');
Hook::register('addon_settings_post', 'addon/windowsphonepush/windowsphonepush.php', 'windowsphonepush_settings_post');
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Logger::notice("installed windowsphonepush");
}
/* declare the windowsphonepush function so that /windowsphonepush url requests will land here */
function windowsphonepush_module()
{
}
/* Callback from the settings post function.
* $post contains the $_POST array.
* We will make sure we've got a valid user account
* and if so set our configuration setting for this person.
*/
function windowsphonepush_settings_post($a, $post)
{
if (!local_user() || empty($_POST['windowsphonepush-submit'])) {
return;
}
$enable = intval($_POST['windowsphonepush']);
DI::pConfig()->set(local_user(), 'windowsphonepush', 'enable', $enable);
if ($enable) {
DI::pConfig()->set(local_user(), 'windowsphonepush', 'counterunseen', 0);
}
DI::pConfig()->set(local_user(), 'windowsphonepush', 'senditemtext', intval($_POST['windowsphonepush-senditemtext']));
}
/* Called from the Addon Setting form.
* Add our own settings info to the page.
*/
function windowsphonepush_settings(App &$a, array &$data)
{
if (!local_user()) {
return;
}
$enabled = DI::pConfig()->get(local_user(), 'windowsphonepush', 'enable');
$senditemtext = DI::pConfig()->get(local_user(), 'windowsphonepush', 'senditemtext');
$device_url = DI::pConfig()->get(local_user(), 'windowsphonepush', 'device_url');
$t = Renderer::getMarkupTemplate('settings.tpl', 'addon/windowsphonepush/');
$html = Renderer::replaceMacros($t, [
'$enabled' => ['windowsphonepush', DI::l10n()->t('Enable WindowsPhonePush Addon'), $enabled],
'$senditemtext' => ['windowsphonepush-senditemtext', DI::l10n()->t('Push text of new item'), $senditemtext],
'$device_url' => ['', DI::l10n()->t('Device URL'), $device_url, '', false, ' readonly'],
]);
$data = [
'addon' => 'windowsphonepush',
'title' => DI::l10n()->t('WindowsPhonePush Settings'),
'html' => $html,
];
}
/* Cron function used to regularly check all users on the server with active windowsphonepushaddon and send
* notifications to the Microsoft servers and consequently to the Windows Phone device
*/
function windowsphonepush_cron()
{
// retrieve all UID's for which the addon windowsphonepush is enabled and loop through every user
$pconfigs = DBA::selectToArray('pconfig', ['uid'], ['cat' => 'windowsphonepush', 'k' => 'enable', 'v' => true]);
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foreach ($pconfigs as $rr) {
// load stored information for the user-id of the current loop
$device_url = DI::pConfig()->get($rr['uid'], 'windowsphonepush', 'device_url');
$lastpushid = DI::pConfig()->get($rr['uid'], 'windowsphonepush', 'lastpushid');
// pushing only possible if device_url (the URI on Microsoft server) is available or not "NA" (which will be sent
// by app if user has switched the server setting in app - sending blank not possible as this would return an update error)
if (( $device_url == "" ) || ( $device_url == "NA" )) {
// no Device-URL for the user availabe, but addon is enabled --> write info to Logger
Logger::notice("WARN: windowsphonepush is enable for user " . $rr['uid'] . ", but no Device-URL is specified for the user.");
} else {
// retrieve the number of unseen items and the id of the latest one (if there are more than
// one new entries since last poller run, only the latest one will be pushed)
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$count = DBA::fetchFirst("SELECT count(`id`) AS count, max(`id`) AS max FROM `post-view` WHERE `unseen` AND `type` != ? AND `uid` = ?", 'activity', $rr['uid']);
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// send number of unseen items to the device (the number will be displayed on Start screen until
// App will be started by user) - this update will be sent every 10 minutes to update the number to 0 if
// user has loaded the timeline through app or website
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$res_tile = send_tile_update($device_url, "", $count['count'], "");
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switch (trim($res_tile)) {
case "Received":
// ok, count has been pushed, let's save it in personal settings
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DI::pConfig()->set($rr['uid'], 'windowsphonepush', 'counterunseen', $count['count']);
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break;
case "QueueFull":
// maximum of 30 messages reached, server rejects any further push notification until device reconnects
Logger::notice("INFO: Device-URL '" . $device_url . "' returns a QueueFull.");
break;
case "Suppressed":
// notification received and dropped as something in app was not enabled
Logger::notice("WARN. Device-URL '" . $device_url . "' returns a Suppressed. Unexpected error in Mobile App?");
break;
case "Dropped":
// mostly combines with Expired, in that case Device-URL will be deleted from pconfig (function send_push)
break;
default:
// error, mostly called by "" which means that the url (not "" which has been checked)
// didn't not received Microsoft Notification Server -> wrong url
Logger::notice("ERROR: specified Device-URL '" . $device_url . "' didn't produced any response.");
}
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// additionally user receives the text of the newest item (function checks against last successfully pushed item)
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if (intval($count['max']) > intval($lastpushid)) {
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// user can define if he wants to see the text of the item in the push notification
// this has been implemented as the device_url is not a https uri (not so secure)
$senditemtext = DI::pConfig()->get($rr['uid'], 'windowsphonepush', 'senditemtext');
if ($senditemtext == 1) {
// load item with the max id
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$item = Post::selectFirst(['author-name', 'body', 'uri-id'], ['id' => $count['max']]);
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// as user allows to send the item, we want to show the sender of the item in the toast
// toasts are limited to one line, therefore place is limited - author shall be in
// max. 15 chars (incl. dots); author is displayed in bold font
$author = $item['author-name'];
$author = ((strlen($author) > 12) ? substr($author, 0, 12) . "..." : $author);
// normally we show the body of the item, however if it is an url or an image we cannot
// show this in the toast (only test), therefore changing to an alternate text
// Otherwise BBcode-Tags will be eliminated and plain text cutted to 140 chars (incl. dots)
// BTW: information only possible in English
$body = $item['body'];
if (substr($body, 0, 4) == "[url") {
$body = "URL/Image ...";
} else {
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$body = BBCode::convertForUriId($item['uri-id'], $body, BBCode::API);
$body = HTML::toPlaintext($body, 0);
$body = ((strlen($body) > 137) ? substr($body, 0, 137) . "..." : $body);
}
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} else {
// if user wishes higher privacy, we only display "Friendica - New timeline entry arrived"
$author = "Friendica";
$body = "New timeline entry arrived ...";
}
// only if toast push notification returns the Notification status "Received" we will update th settings with the
// new indicator max-id is checked against (QueueFull, Suppressed, N/A, Dropped shall qualify to resend
// the push notification some minutes later (BTW: if resulting in Expired for subscription status the
// device_url will be deleted (no further try on this url, see send_push)
// further log information done on count pushing with send_tile (see above)
$res_toast = send_toast($device_url, $author, $body);
if (trim($res_toast) === 'Received') {
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DI::pConfig()->set($rr['uid'], 'windowsphonepush', 'lastpushid', $count['max']);
}
}
}
}
}
/* Tile push notification change the number in the icon of the App in Start Screen of
* a Windows Phone Device, Image could be changed, not used for App "Friendica Mobile"
*/
function send_tile_update($device_url, $image_url, $count, $title, $priority = 1)
{
$msg = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" .
"<wp:Notification xmlns:wp=\"WPNotification\">" .
"<wp:Tile>" .
"<wp:BackgroundImage>" . $image_url . "</wp:BackgroundImage>" .
"<wp:Count>" . $count . "</wp:Count>" .
"<wp:Title>" . $title . "</wp:Title>" .
"</wp:Tile> " .
"</wp:Notification>";
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$result = send_push($device_url, [
'X-WindowsPhone-Target: token',
'X-NotificationClass: ' . $priority,
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], $msg);
return $result;
}
/* Toast push notification send information to the top of the display
* if the user is not currently using the Friendica Mobile App, however
* there is only one line for displaying the information
*/
function send_toast($device_url, $title, $message, $priority = 2)
{
$msg = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" .
"<wp:Notification xmlns:wp=\"WPNotification\">" .
"<wp:Toast>" .
"<wp:Text1>" . $title . "</wp:Text1>" .
"<wp:Text2>" . $message . "</wp:Text2>" .
"<wp:Param></wp:Param>" .
"</wp:Toast>" .
"</wp:Notification>";
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$result = send_push($device_url, [
'X-WindowsPhone-Target: toast',
'X-NotificationClass: ' . $priority,
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], $msg);
return $result;
}
// General function to send the push notification via cURL
function send_push($device_url, $headers, $msg)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $device_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers + [
'Content-Type: text/xml',
'charset=utf-8',
'Accept: application/*',
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]
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $msg);
$output = curl_exec($ch);
curl_close($ch);
// if we received "Expired" from Microsoft server we will delete the obsolete device-URL
// and log this fact
$subscriptionStatus = get_header_value($output, 'X-SubscriptionStatus');
if ($subscriptionStatus == "Expired") {
DI::pConfig()->set(local_user(), 'windowsphonepush', 'device_url', "");
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Logger::notice("ERROR: the stored Device-URL " . $device_url . "returned an 'Expired' error, it has been deleted now.");
}
// the notification status shall be returned to windowsphonepush_cron (will
// update settings if 'Received' otherwise keep old value in settings (on QueuedFull. Suppressed, N/A, Dropped)
$notificationStatus = get_header_value($output, 'X-NotificationStatus');
return $notificationStatus;
}
// helper function to receive statuses from webresponse of Microsoft server
function get_header_value($content, $header)
{
return preg_match_all("/$header: (.*)/i", $content, $match) ? $match[1][0] : "";
}
/* reading information from url and deciding which function to start
* show_settings = delivering settings to check
* update_settings = set the device_url
* update_counterunseen = set counter for unseen elements to zero
*/
function windowsphonepush_content(App $a)
{
// Login with the specified Network credentials (like in api.php)
windowsphonepush_login($a);
$path = DI::args()->getArgv()[0];
$path2 = DI::args()->getArgv()[1];
if ($path == "windowsphonepush") {
switch ($path2) {
case "show_settings":
windowsphonepush_showsettings($a);
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exit();
break;
case "update_settings":
$ret = windowsphonepush_updatesettings($a);
header("Content-Type: application/json; charset=utf-8");
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echo json_encode(['status' => $ret]);
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exit();
break;
case "update_counterunseen":
$ret = windowsphonepush_updatecounterunseen();
header("Content-Type: application/json; charset=utf-8");
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echo json_encode(['status' => $ret]);
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exit();
break;
default:
echo "Fehler";
}
}
}
// return settings for windowsphonepush addon to be able to check them in WP app
function windowsphonepush_showsettings()
{
if (!local_user()) {
return;
}
$enable = DI::pConfig()->get(local_user(), 'windowsphonepush', 'enable');
$device_url = DI::pConfig()->get(local_user(), 'windowsphonepush', 'device_url');
$senditemtext = DI::pConfig()->get(local_user(), 'windowsphonepush', 'senditemtext');
$lastpushid = DI::pConfig()->get(local_user(), 'windowsphonepush', 'lastpushid');
$counterunseen = DI::pConfig()->get(local_user(), 'windowsphonepush', 'counterunseen');
$addonversion = "2.0";
if (!$device_url) {
$device_url = "";
}
if (!$lastpushid) {
$lastpushid = 0;
}
header("Content-Type: application/json");
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echo json_encode(['uid' => local_user(),
'enable' => $enable,
'device_url' => $device_url,
'senditemtext' => $senditemtext,
'lastpushid' => $lastpushid,
'counterunseen' => $counterunseen,
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'addonversion' => $addonversion]);
}
/* update_settings is used to transfer the device_url from WP device to the Friendica server
* return the status of the operation to the server
*/
function windowsphonepush_updatesettings()
{
if (!local_user()) {
return "Not Authenticated";
}
// no updating if user hasn't enabled the addon
$enable = DI::pConfig()->get(local_user(), 'windowsphonepush', 'enable');
if (!$enable) {
return "Plug-in not enabled";
}
// check if sent url is empty - don't save and send return code to app
$device_url = $_POST['deviceurl'];
if ($device_url == "") {
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Logger::notice("ERROR: no valid Device-URL specified - client transferred '" . $device_url . "'");
return "No valid Device-URL specified";
}
// check if sent url is already stored in database for another user, we assume that there was a change of
// the user on the Windows Phone device and that device url is no longer true for the other user, so we
// et the device_url for the OTHER user blank (should normally not occur as App should include User/server
// in url request to Microsoft Push Notification server)
$pconfigs = DBA::selectToArray('pconfig', ['uid'], ["`uid` != ? AND `cat` = ? AND `k` = ? AND `v` = ?", local_user(), 'windowsphonepush', 'device_url', $device_url]);
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foreach ($pconfigs as $rr) {
DI::pConfig()->set($rr['uid'], 'windowsphonepush', 'device_url', '');
Logger::notice("WARN: the sent URL was already registered with user '" . $rr['uid'] . "'. Deleted for this user as we expect to be correct now for user '" . local_user() . "'.");
}
DI::pConfig()->set(local_user(), 'windowsphonepush', 'device_url', $device_url);
// output the successfull update of the device URL to the logger for error analysis if necessary
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Logger::notice("INFO: Device-URL for user '" . local_user() . "' has been updated with '" . $device_url . "'");
return "Device-URL updated successfully!";
}
// update_counterunseen is used to reset the counter to zero from Windows Phone app
function windowsphonepush_updatecounterunseen()
{
if (!local_user()) {
return "Not Authenticated";
}
// no updating if user hasn't enabled the addon
$enable = DI::pConfig()->get(local_user(), 'windowsphonepush', 'enable');
if (!$enable) {
return "Plug-in not enabled";
}
DI::pConfig()->set(local_user(), 'windowsphonepush', 'counterunseen', 0);
return "Counter set to zero";
}
/* helper function to login to the server with the specified Network credentials
* (mainly copied from api.php)
*/
function windowsphonepush_login(App $a)
{
if (!isset($_SERVER['PHP_AUTH_USER'])) {
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Logger::info('API_login: ' . print_r($_SERVER, true));
header('WWW-Authenticate: Basic realm="Friendica"');
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throw new UnauthorizedException('This api requires login');
}
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try {
$user_id = User::getIdFromPasswordAuthentication($_SERVER['PHP_AUTH_USER'], trim($_SERVER['PHP_AUTH_PW']));
$record = DBA::selectFirst('user', [], ['uid' => $user_id]);
DI::auth()->setForUser($a, $record);
DI::session()->set('allow_api', true);
Hook::callAll('logged_in', $record);
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} catch (Exception $ex) {
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Logger::info('API_login failure: ' . print_r($_SERVER, true));
header('WWW-Authenticate: Basic realm="Friendica"');
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throw new UnauthorizedException('This api requires login');
}
}