From ed1e080fbe9142af705866c38307158bcf0af439 Mon Sep 17 00:00:00 2001
From: Vitor Pamplona <vitor@vitorpamplona.com>
Date: Thu, 23 Mar 2023 15:20:35 -0400
Subject: [PATCH] Support for `r` tags

---
 .../amethyst/service/model/TextNoteEvent.kt              | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/app/src/main/java/com/vitorpamplona/amethyst/service/model/TextNoteEvent.kt b/app/src/main/java/com/vitorpamplona/amethyst/service/model/TextNoteEvent.kt
index ef349a792..f64582ba3 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/service/model/TextNoteEvent.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/service/model/TextNoteEvent.kt
@@ -1,5 +1,7 @@
 package com.vitorpamplona.amethyst.service.model
 
+import com.linkedin.urls.detection.UrlDetector
+import com.linkedin.urls.detection.UrlDetectorOptions
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.toHexKey
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.findHashtags
@@ -44,9 +46,16 @@ class TextNoteEvent(
             extraTags?.forEach {
                 tags.add(listOf("t", it))
             }
+            findURLs(msg).forEach {
+                tags.add(listOf("r", it))
+            }
             val id = generateId(pubKey, createdAt, kind, tags, msg)
             val sig = Utils.sign(id, privateKey)
             return TextNoteEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }
 }
+
+fun findURLs(text: String): List<String> {
+    return UrlDetector(text, UrlDetectorOptions.Default).detect().map { it.originalUrl }
+}