<?php
/**
- * @copyright Copyright (C) 2010-2022, the Friendica project
+ * @copyright Copyright (C) 2010-2023, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
use Friendica\Model\Post;
use Friendica\Protocol\Activity;
use Friendica\Protocol\ActivityPub;
+use Friendica\Protocol\Delivery;
use Friendica\Protocol\Relay;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\HTTPSignature;
use Friendica\Util\JsonLD;
use Friendica\Util\Network;
use Friendica\Util\Strings;
-use Friendica\Worker\Delivery;
/**
* ActivityPub Processor Protocol class
*/
public static function normalizeMentionLinks(string $body): string
{
- return preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
+ $body = preg_replace('%\[url=([^\[\]]*)]([#@!])(.*?)\[/url]%ism', '$2[url=$1]$3[/url]', $body);
+ $body = preg_replace('%([#@!])\[zrl=([^\[\]]*)](.*?)\[/zrl]%ism', '$1[url=$2]$3[/url]', $body);
+ return $body;
}
/**
$item['changed'] = DateTimeFormat::utcNow();
$item['edited'] = DateTimeFormat::utc($activity['updated']);
+ Post\Media::deleteByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE, Post\Media::HTML]);
$item = self::processContent($activity, $item);
if (empty($item)) {
Queue::remove($activity);
$item['thr-parent'] = $activity['reply-to-id'];
if ($activity['reply-to-id'] == $activity['id']) {
- $item['gravity'] = GRAVITY_PARENT;
+ $item['gravity'] = Item::GRAVITY_PARENT;
$item['object-type'] = Activity\ObjectType::NOTE;
} else {
- $item['gravity'] = GRAVITY_COMMENT;
+ $item['gravity'] = Item::GRAVITY_COMMENT;
$item['object-type'] = Activity\ObjectType::COMMENT;
}
$item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
- if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
+ if (empty($conversation) && empty($activity['directmessage']) && ($item['gravity'] != Item::GRAVITY_PARENT) && !Post::exists(['uri' => $item['thr-parent']])) {
Logger::notice('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
if (!$fetch_parents) {
Queue::remove($activity);
$item['owner-id'] = $item['author-id'];
} else {
$actor = APContact::getByURL($item['owner-link'], false);
- $item['isForum'] = ($actor['type'] == 'Group');
+ $item['isForum'] = ($actor['type'] ?? 'Person') == 'Group';
}
$item['uri'] = $activity['id'];
$recursion_depth = $activity['recursion-depth'] ?? 0;
if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
- Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
+ Logger::info('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
$result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
} elseif (!empty($result)) {
$exists = Post::exists(['uri' => [$result, $activity['reply-to-id']]]);
if ($exists) {
- Logger::notice('The activity has been fetched and created.', ['parent' => $result]);
+ Logger::info('The activity has been fetched and created.', ['parent' => $result]);
return $result;
} elseif (DI::config()->get('system', 'fetch_by_worker') || DI::config()->get('system', 'decoupled_receiver')) {
- Logger::notice('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
+ Logger::info('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
} else {
Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
if (!empty($activity['entry-id'])) {
*/
public static function isActivityGone(string $url): bool
{
- $curlResult = HTTPSignature::fetchRaw($url, 0);
+ try {
+ $curlResult = HTTPSignature::fetchRaw($url, 0);
+ } catch (\Exception $exception) {
+ Logger::notice('Error fetching url', ['url' => $url, 'exception' => $exception]);
+ return true;
+ }
if (Network::isUrlBlocked($url)) {
return true;
$item['verb'] = $verb;
$item['thr-parent'] = $activity['object_id'];
- $item['gravity'] = GRAVITY_ACTIVITY;
+ $item['gravity'] = Item::GRAVITY_ACTIVITY;
unset($item['post-type']);
$item['object-type'] = Activity\ObjectType::NOTE;
private static function processContent(array $activity, array $item)
{
if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
- $item['title'] = strip_tags($activity['name']);
+ $item['title'] = strip_tags($activity['name'] ?? '');
$content = Markdown::toBBCode($activity['content']);
} elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
$item['title'] = $activity['name'];
$content = self::addMentionLinks($content, $activity['tags']);
+ if (!empty($activity['quote-url'])) {
+ $id = Item::fetchByLink($activity['quote-url']);
+ if ($id) {
+ $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
+ $item['quote-uri-id'] = $shared_item['uri-id'];
+ } elseif ($uri_id = ItemURI::getIdByURI($activity['quote-url'], false)) {
+ Logger::info('Quote was not fetched but the uri-id existed', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url'], 'uri-id' => $uri_id]);
+ $item['quote-uri-id'] = $uri_id;
+ } else {
+ Logger::info('Quote was not fetched', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'quote' => $activity['quote-url']]);
+ }
+ }
+
if (!empty($activity['source'])) {
$item['body'] = $activity['source'];
$item['raw-body'] = $content;
- $item['body'] = Item::improveSharedDataInBody($item);
+
+ $quote_uri_id = Item::getQuoteUriId($item['body']);
+ if (empty($item['quote-uri-id']) && !empty($quote_uri_id)) {
+ $item['quote-uri-id'] = $quote_uri_id;
+ }
+
+ $item['body'] = BBCode::removeSharedData($item['body']);
} else {
$parent_uri = $item['parent-uri'] ?? $item['thr-parent'];
- if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
+ if (empty($activity['directmessage']) && ($parent_uri != $item['uri']) && ($item['gravity'] == Item::GRAVITY_COMMENT)) {
$parent = Post::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $parent_uri]);
if (!DBA::isResult($parent)) {
Logger::warning('Unknown parent item.', ['uri' => $parent_uri]);
return false;
}
- if (!empty($activity['type']) && in_array($activity['type'], Receiver::CONTENT_TYPES) && ($item['private'] == Item::PRIVATE) && ($parent['private'] != Item::PRIVATE)) {
- Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
- return false;
- }
-
$content = self::removeImplicitMentionsFromBody($content, $parent);
}
$item['content-warning'] = HTML::toBBCode($activity['summary'] ?? '');
$item['raw-body'] = $item['body'] = $content;
-
- if (!empty($activity['quote-url'])) {
- $item['body'] .= DI::contentItem()->createSharedPostByUrl($activity['quote-url']);
- }
}
self::storeFromBody($item);
return true;
}
- if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUCE])) {
+ if (in_array($activity['completion-mode'] ?? Receiver::COMPLETION_NONE, [Receiver::COMPLETION_MANUAL, Receiver::COMPLETION_ANNOUNCE])) {
// Manual completions and completions caused by reshares are allowed without any further checks.
Logger::debug('Message is in completion mode - accepted', ['mode' => $activity['completion-mode'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
return true;
}
- if ($item['gravity'] != GRAVITY_PARENT) {
+ if ($item['gravity'] != Item::GRAVITY_PARENT) {
// We cannot reliably check at this point if a comment or activity belongs to an accepted post or needs to be fetched
// This can possibly be improved in the future.
Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
}
$tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
- if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB)) {
+ if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0)) {
Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
return true;
} else {
case Receiver::TARGET_BCC:
$item['post-reason'] = Item::PR_BCC;
break;
+ case Receiver::TARGET_AUDIENCE:
+ $item['post-reason'] = Item::PR_AUDIENCE;
+ break;
case Receiver::TARGET_FOLLOWER:
$item['post-reason'] = Item::PR_FOLLOWER;
break;
// When a post arrives via a relay and we follow the author, we have to override the causer.
// Otherwise the system assumes that we follow the relay. (See "addRowInformation")
Logger::debug('Relay post for follower', ['receiver' => $receiver, 'guid' => $item['guid'], 'relay' => $activity['from-relay']]);
- $item['causer-id'] = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
+ $item['causer-id'] = ($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
}
if ($item['isForum'] ?? false) {
continue;
}
- if (($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC])) {
+ if (($receiver != 0) && ($item['gravity'] == Item::GRAVITY_PARENT) && !in_array($item['post-reason'], [Item::PR_FOLLOWER, Item::PR_TAG, item::PR_TO, Item::PR_CC, Item::PR_AUDIENCE])) {
if (!($item['isForum'] ?? false)) {
if ($item['post-reason'] == Item::PR_BCC) {
Logger::info('Top level post via BCC from a non sharer, ignoring', ['uid' => $receiver, 'contact' => $item['contact-id'], 'url' => $item['uri']]);
continue;
}
- if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
+ if (($item['gravity'] != Item::GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
$event_id = self::createEvent($activity, $item);
$item = Event::getItemArrayForImportedId($event_id, $item);
}
// Store send a follow request for every reshare - but only when the item had been stored
- if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
+ if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == Item::GRAVITY_PARENT) && !empty($item['author-link']) && ($item['author-link'] != $item['owner-link'])) {
$author = APContact::getByURL($item['owner-link'], false);
// We send automatic follow requests for reshared messages. (We don't need though for forum posts)
if ($author['type'] != 'Group') {
*/
private static function hasParents(array $item, int $receiver)
{
- if (($receiver == 0) || ($item['gravity'] == GRAVITY_PARENT)) {
+ if (($receiver == 0) || ($item['gravity'] == Item::GRAVITY_PARENT)) {
return true;
}
if ($item['verb'] != Activity::ANNOUNCE) {
switch (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer')) {
case Item::COMPLETION_COMMENT:
- $add_parent = ($item['gravity'] != GRAVITY_ACTIVITY);
+ $add_parent = ($item['gravity'] != Item::GRAVITY_ACTIVITY);
break;
case Item::COMPLETION_NONE:
if (!empty($item['parent-uri-id'])) {
if (Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $receiver])) {
$has_parents = true;
- } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri'], 'uid' => 0])) {
+ } elseif ($add_parent && Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
$stored = Item::storeForUserByUriId($item['parent-uri-id'], $receiver, $fields);
$has_parents = (bool)$stored;
if ($stored) {
public static function storeReceivers(int $uriid, array $receivers)
{
- foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
+ foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC, 'as:audience' => Tag::AUDIENCE, 'as:attributedTo' => Tag::ATTRIBUTED] as $element => $type) {
if (!empty($receivers[$element])) {
foreach ($receivers[$element] as $receiver) {
if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
$name = Receiver::PUBLIC_COLLECTION;
+ } elseif ($path = parse_url($receiver, PHP_URL_PATH)) {
+ $name = trim($path, '/');
+ } elseif ($host = parse_url($receiver, PHP_URL_HOST)) {
+ $name = $host;
} else {
- $name = trim(parse_url($receiver, PHP_URL_PATH), '/');
+ Logger::warning('Unable to coerce name from receiver', ['element' => $element, 'type' => $type, 'receiver' => $receiver]);
+ $name = '';
}
$target = Tag::getTargetType($receiver);
*/
private static function postMail(array $activity, array $item)
{
- if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
+ if (($item['gravity'] != Item::GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
return false;
}
* @param array $child activity array with the child of this message
* @param string $relay_actor Relay actor
* @param int $completion Completion mode, see Receiver::COMPLETION_*
+ * @param int $uid User id that is used to fetch the activity
* @return string fetched message URL
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
- public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL): string
+ public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '', int $completion = Receiver::COMPLETION_MANUAL, int $uid = 0): string
{
- $object = self::fetchCachedActivity($url, 0);
+ $object = self::fetchCachedActivity($url, $uid);
if (empty($object)) {
return '';
}
$ldactivity['recursion-depth'] = !empty($child['recursion-depth']) ? $child['recursion-depth'] + 1 : 0;
- if (!empty($relay_actor)) {
- $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
- $ldactivity['completion-mode'] = Receiver::COMPLETION_RELAY;
- } elseif (!empty($child['thread-completion'])) {
+ if ($object_actor != $actor) {
+ Contact::updateByUrlIfNeeded($object_actor);
+ }
+
+ Contact::updateByUrlIfNeeded($actor);
+
+ if (!empty($child['thread-completion'])) {
$ldactivity['thread-completion'] = $child['thread-completion'];
$ldactivity['completion-mode'] = $child['completion-mode'] ?? Receiver::COMPLETION_NONE;
} else {
- $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
+ $ldactivity['thread-completion'] = Contact::getIdForURL($relay_actor ?: $actor);
$ldactivity['completion-mode'] = $completion;
}
+ if ($completion == Receiver::COMPLETION_RELAY) {
+ $ldactivity['from-relay'] = $ldactivity['thread-completion'];
+ if (!self::acceptIncomingMessage($ldactivity, $object['id'])) {
+ return '';
+ }
+ }
+
if (!empty($child['thread-children-type'])) {
$ldactivity['thread-children-type'] = $child['thread-children-type'];
} elseif (!empty($child['type'])) {
$ldactivity['thread-children-type'] = 'as:Create';
}
- if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
- return '';
- }
-
if (($completion == Receiver::COMPLETION_RELAY) && Queue::exists($url, 'as:Create')) {
- Logger::notice('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
- } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), 0, true, false, $signer, '', $completion)) {
- Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
+ Logger::info('Activity has already been queued.', ['url' => $url, 'object' => $activity['id']]);
+ } elseif (ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer, '', $completion)) {
+ Logger::info('Activity had been fetched and processed.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
} else {
- Logger::notice('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
+ Logger::info('Activity had been fetched and will be processed later.', ['url' => $url, 'entry' => $child['entry-id'] ?? 0, 'completion' => $completion, 'object' => $activity['id']]);
}
return $activity['id'];
}
}
- return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
+ return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0);
}
/**
{
if (empty($activity['object_id']) || empty($activity['actor'])) {
Logger::info('Empty object id or actor.');
+ Queue::remove($activity);
return;
}
if ($activity['object_id'] != $activity['actor']) {
Logger::info('Object id does not match actor.');
+ Queue::remove($activity);
return;
}
Queue::remove($activity);
}
+ /**
+ * Add moved contacts as followers for all subscribers of the old contact
+ *
+ * @param array $activity
+ * @return void
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function movePerson(array $activity)
+ {
+ if (empty($activity['target_id']) || empty($activity['object_id'])) {
+ Queue::remove($activity);
+ return;
+ }
+
+ if ($activity['object_id'] != $activity['actor']) {
+ Logger::notice('Object is not the actor', ['activity' => $activity]);
+ Queue::remove($activity);
+ return;
+ }
+
+ $from = Contact::getByURL($activity['object_id'], false, ['uri-id']);
+ if (empty($from['uri-id'])) {
+ Logger::info('Object not found', ['activity' => $activity]);
+ Queue::remove($activity);
+ return;
+ }
+
+ $contacts = DBA::select('contact', ['uid', 'url'], ["`uri-id` = ? AND `uid` != ? AND `rel` IN (?, ?)", $from['uri-id'], 0, Contact::FRIEND, Contact::SHARING]);
+ while ($from_contact = DBA::fetch($contacts)) {
+ $result = Contact::createFromProbeForUser($from_contact['uid'], $activity['target_id']);
+ Logger::debug('Follower added', ['from' => $from_contact, 'result' => $result]);
+ }
+ DBA::close($contacts);
+ Queue::remove($activity);
+ }
+
/**
* Blocks the user by the contact
*
Queue::remove($activity);
}
+ /**
+ * Report a user
+ *
+ * @param array $activity
+ * @return void
+ * @throws \Exception
+ */
+ public static function ReportAccount(array $activity)
+ {
+ $account_id = Contact::getIdForURL($activity['object_id']);
+ if (empty($account_id)) {
+ Logger::info('Unknown account', ['activity' => $activity]);
+ Queue::remove($activity);
+ return;
+ }
+
+ $reporter_id = Contact::getIdForURL($activity['actor']);
+ if (empty($reporter_id)) {
+ Logger::info('Unknown actor', ['activity' => $activity]);
+ Queue::remove($activity);
+ return;
+ }
+
+ $uri_ids = [];
+ foreach ($activity['object_ids'] as $status_id) {
+ $post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
+ if (!empty($post['uri-id'])) {
+ $uri_ids[] = $post['uri-id'];
+ }
+ }
+
+ $report = DI::reportFactory()->createFromReportsRequest($reporter_id, $account_id, $activity['content'], null, '', false, $uri_ids);
+ DI::report()->save($report);
+
+ Logger::info('Stored report', ['reporter' => $reporter_id, 'account_id' => $account_id, 'comment' => $activity['content'], 'object_ids' => $activity['object_ids']]);
+ }
+
/**
* Accept a follow request
*
*/
public static function acceptFollowUser(array $activity)
{
- $uid = User::getIdForURL($activity['object_actor']);
+ if (!empty($activity['object_actor'])) {
+ $uid = User::getIdForURL($activity['object_actor']);
+ $check_id = false;
+ } elseif (!empty($activity['receiver']) && (count($activity['receiver']) == 1)) {
+ $uid = array_shift($activity['receiver']);
+ $check_id = true;
+ }
+
if (empty($uid)) {
+ Logger::notice('User could not be detected', ['activity' => $activity]);
+ Queue::remove($activity);
return;
}
$cid = Contact::getIdForURL($activity['actor'], $uid);
if (empty($cid)) {
- Logger::info('No contact found', ['actor' => $activity['actor']]);
+ Logger::notice('No contact found', ['actor' => $activity['actor']]);
+ Queue::remove($activity);
return;
}
+ $id = Transmitter::activityIDFromContact($cid);
+ if ($id == $activity['object_id']) {
+ Logger::info('Successful id check', ['uid' => $uid, 'cid' => $cid]);
+ } else {
+ Logger::info('Unsuccessful id check', ['uid' => $uid, 'cid' => $cid, 'id' => $id, 'object_id' => $activity['object_id']]);
+ if ($check_id) {
+ Queue::remove($activity);
+ return;
+ }
+ }
+
self::switchContact($cid);
$fields = ['pending' => false];
return;
}
- Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
+ Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => Item::GRAVITY_ACTIVITY]);
Queue::remove($activity);
}
projects / friendica.git / blobdiff