Improve emoji federation and mastodon api compliance

src/Content/Smilies.php

@@ -152,6 +152,34 @@ class Smilies
 		return $params;
 	}
 
+	/**
+	 * Finds all used smilies (like :heart: or :p) in the provided text.
+	 *
+	 * @param string $text that might contain smilie usages (denoted by a starting colon)
+	 * @param bool   $extract_url whether to further extract image urls
+	 * @return array with smilie codes (colon included) as the keys, the smilie images as values
+	 */
+	public static function extractUsedSmilies(string $text, bool $extract_url = false): array
+	{
+		$emojis = [];
+
+		$smilies = self::getList();
+		$icons = $smilies['icons'];
+		foreach ($smilies['texts'] as $i => $name) {
+			if (strstr($text, $name)) {
+				$image = $icons[$i];
+				if ($extract_url) {
+					if (preg_match('/src="(.+?)"/', $image, $match)) {
+						$image = $match[1];
+					} else {
+						continue;
+					}
+				}
+				$emojis[$name] = $image;
+			}
+		}
+		return $emojis;
+	}
 
 	/**
 	 * Copied from http://php.net/manual/en/function.str-replace.php#88569

src/Factory/Api/Mastodon/Emoji.php

@@ -32,19 +32,22 @@ class Emoji extends BaseFactory
 	}
 
 	/**
+	 * Creates an emoji collection from shortcode => image mappings.
+	 *
 	 * @param array $smilies
 	 *
 	 * @return Emojis
 	 */
-	public function createCollectionFromSmilies(array $smilies): Emojis
+	public function createCollectionFromArray(array $smilies): Emojis
 	{
 		$prototype = null;
 
 		$emojis = [];
 
-		foreach ($smilies['texts'] as $key => $shortcode) {
-			if (preg_match('/src="(.+?)"/', $smilies['icons'][$key], $matches)) {
+		foreach ($smilies as $shortcode => $icon) {
+			if (preg_match('/src="(.+?)"/', $icon, $matches)) {
 				$url = $matches[1];
+				$shortcode = trim($shortcode, ':');
 
 				if ($prototype === null) {
 					$prototype = $this->create($shortcode, $url);
@@ -52,9 +55,19 @@ class Emoji extends BaseFactory
 				} else {
 					$emojis[] = \Friendica\Object\Api\Mastodon\Emoji::createFromPrototype($prototype, $shortcode, $url);
 				}
-			};
+			}
 		}
 
 		return new Emojis($emojis);
 	}
+
+	/**
+	 * @param array $smilies
+	 *
+	 * @return Emojis
+	 */
+	public function createCollectionFromSmilies(array $smilies): Emojis
+	{
+		return self::createCollectionFromArray(array_combine($smilies['texts'], $smilies['icons']));
+	}
 }

src/Factory/Api/Mastodon/Status.php

@@ -24,6 +24,7 @@ namespace Friendica\Factory\Api\Mastodon;
 use Friendica\BaseFactory;
 use Friendica\Content\ContactSelector;
 use Friendica\Content\Item as ContentItem;
+use Friendica\Content\Smilies;
 use Friendica\Content\Text\BBCode;
 use Friendica\Core\Logger;
 use Friendica\Database\Database;
@@ -57,6 +58,8 @@ class Status extends BaseFactory
 	private $mstdnCardFactory;
 	/** @var Attachment */
 	private $mstdnAttachmentFactory;
+	/** @var Emoji */
+	private $mstdnEmojiFactory;
 	/** @var Error */
 	private $mstdnErrorFactory;
 	/** @var Poll */
@@ -74,6 +77,7 @@ class Status extends BaseFactory
 		Tag $mstdnTagFactory,
 		Card $mstdnCardFactory,
 		Attachment $mstdnAttachmentFactory,
+		Emoji $mstdnEmojiFactory,
 		Error $mstdnErrorFactory,
 		Poll $mstdnPollFactory,
 		ContentItem $contentItem,
@@ -86,6 +90,7 @@ class Status extends BaseFactory
 		$this->mstdnTagFactory        = $mstdnTagFactory;
 		$this->mstdnCardFactory       = $mstdnCardFactory;
 		$this->mstdnAttachmentFactory = $mstdnAttachmentFactory;
+		$this->mstdnEmojiFactory      = $mstdnEmojiFactory;
 		$this->mstdnErrorFactory      = $mstdnErrorFactory;
 		$this->mstdnPollFactory       = $mstdnPollFactory;
 		$this->contentItem            = $contentItem;
@@ -283,6 +288,9 @@ class Status extends BaseFactory
 			}
 		}
 
+		$used_smilies = Smilies::extractUsedSmilies($item['body'] ?: $item['raw-body']);
+		$emojis = $this->mstdnEmojiFactory->createCollectionFromArray($used_smilies)->getArrayCopy(true);
+
 		if ($is_reshare) {
 			try {
 				$reshare = $this->createFromUriId($uriId, $uid, $display_quote, false, false)->toArray();
@@ -309,7 +317,7 @@ class Status extends BaseFactory
 		$visibility_data = $uid != $item['uid'] ? null : new FriendicaVisibility($this->aclFormatter->expand($item['allow_cid']), $this->aclFormatter->expand($item['deny_cid']), $this->aclFormatter->expand($item['allow_gid']), $this->aclFormatter->expand($item['deny_gid']));
 		$friendica       = new FriendicaExtension($item['title'] ?? '', $item['changed'], $item['commented'], $item['received'], $counts->dislikes, $origin_dislike, $delivery_data, $visibility_data);
 
-		return new \Friendica\Object\Api\Mastodon\Status($item, $account, $counts, $userAttributes, $sensitive, $application, $mentions, $tags, $card, $attachments, $in_reply, $reshare, $friendica, $quote, $poll);
+		return new \Friendica\Object\Api\Mastodon\Status($item, $account, $counts, $userAttributes, $sensitive, $application, $mentions, $tags, $card, $attachments, $in_reply, $reshare, $friendica, $quote, $poll, $emojis);
 	}
 
 	/**

src/Object/Api/Mastodon/Status.php

@@ -107,7 +107,7 @@ class Status extends BaseDataTransferObject
 	 * @param array   $item
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
-	public function __construct(array $item, Account $account, Counts $counts, UserAttributes $userAttributes, bool $sensitive, Application $application, array $mentions, array $tags, Card $card, array $attachments, array $in_reply, array $reblog, FriendicaExtension $friendica, array $quote = null, array $poll = null)
+	public function __construct(array $item, Account $account, Counts $counts, UserAttributes $userAttributes, bool $sensitive, Application $application, array $mentions, array $tags, Card $card, array $attachments, array $in_reply, array $reblog, FriendicaExtension $friendica, array $quote = null, array $poll = null, array $emojis = null)
 	{
 		$reblogged          = !empty($reblog);
 		$this->id           = (string)$item['uri-id'];
@@ -152,7 +152,7 @@ class Status extends BaseDataTransferObject
 		$this->media_attachments = $reblogged ? [] : $attachments;
 		$this->mentions = $reblogged ? [] : $mentions;
 		$this->tags = $reblogged ? [] : $tags;
-		$this->emojis = $reblogged ? [] : [];
+		$this->emojis = $reblogged ? [] : ($emojis ?: []);
 		$this->card = $reblogged ? null : ($card->toArray() ?: null);
 		$this->poll = $reblogged ? null : $poll;
 		$this->friendica = $reblogged ? null : $friendica;

src/Protocol/ActivityPub/Transmitter.php

@@ -23,6 +23,7 @@ namespace Friendica\Protocol\ActivityPub;
 
 use Friendica\App;
 use Friendica\Content\Feature;
+use Friendica\Content\Smilies;
 use Friendica\Content\Text\BBCode;
 use Friendica\Core\Cache\Enum\Duration;
 use Friendica\Core\Logger;
@@ -1506,6 +1507,26 @@ class Transmitter
 		return $location;
 	}
 
+	/**
+	 * Appends emoji tags to a tag array according to the tags used.
+	 *
+	 * @param array $tags Tag array
+	 * @param string $text Text containing tags like :tag:
+	 */
+	private static function addEmojiTags(array &$tags, string $text)
+	{
+		foreach (Smilies::extractUsedSmilies($text, true) as $name => $url) {
+			$tags[] = [
+				'type' => 'Emoji',
+				'name' => $name,
+				'icon' => [
+					'type' => 'Image',
+					'url' => $url,
+				],
+			];
+		}
+	}
+
 	/**
 	 * Returns a tag array for a given item array
 	 *
@@ -1538,6 +1559,8 @@ class Transmitter
 			}
 		}
 
+		self::addEmojiTags($tags, $item['body']);
+
 		$announce = self::getAnnounceArray($item);
 		// Mention the original author upon commented reshares
 		if (!empty($announce['comment'])) {