Render custom emoji reactions in notifications tab

app/src/main/java/com/keylesspalace/tusky/components/notifications/StatusNotificationViewHolder.kt

@@ -289,8 +289,11 @@ internal class StatusNotificationViewHolder(
             displayNameIndex + displayName.length,
             Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
         )
+        val emojis = notificationViewData.account.emojis?.toMutableList() ?: mutableListOf()
+        if (notificationViewData.isCustomEmoji())
+            emojis.add(notificationViewData.makeCustomEmoji())
         val emojifiedText = str.emojify(
-            notificationViewData.account.emojis,
+            emojis,
             binding.notificationTopText,
             animateEmojis
         )

app/src/main/java/com/keylesspalace/tusky/entity/Notification.kt

@@ -32,6 +32,7 @@ data class Notification(
     val report: Report?,
     val pleroma: PleromaNotification? = null,
     val emoji: String? = null,
+    @SerializedName("emoji_url") val emojiUrl: String? = null,
 ) {
 
     /** From https://docs.joinmastodon.org/entities/Notification/#type */

app/src/main/java/com/keylesspalace/tusky/util/ViewDataUtils.kt

@@ -67,6 +67,7 @@ fun Notification.toViewData(
         this.status?.toViewData(isShowingContent, isExpanded, isCollapsed),
         this.report,
         this.emoji,
+        this.emojiUrl,
     )
 }
 

app/src/main/java/com/keylesspalace/tusky/viewdata/NotificationViewData.kt

@@ -42,4 +42,14 @@ data class NotificationViewData(
     var statusViewData: StatusViewData.Concrete?,
     val report: Report?,
     val emoji: String?,
+    val emojiUrl: String?,
 )
+{
+    fun isCustomEmoji() = emojiUrl != null
+
+    fun makeCustomEmoji(): Emoji {
+        // Trim ':' characters to comply with CustomEmojiHelper rules.
+        val shortcode: String = emoji!!.substring(1, emoji.length - 1)
+        return Emoji(shortcode, emojiUrl!!, emojiUrl, false)
+    }
+}