feat(chat): add "Copy message link" to message actions

Add a "Copy message link" option to the long-press message actions
bottom sheet. It copies a link in the same format the web client uses
({baseUrl}/call/{token}#message_{messageId}) to the clipboard, so the
link can be shared (e.g. by email) and opened in the browser, landing
on the referenced message.

Resolves: #2361

Assisted-by: ClaudeCode:claude-opus-4-8
Signed-off-by: Jan C. Borchardt <925062+jancborchardt@users.noreply.github.com>

Author: jancborchardt

app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt

@@ -948,6 +948,7 @@ class ChatActivity :
                                 onForward = { forwardMessage(msg) },
                                 onEdit = { messageInputViewModel.edit(msg) },
                                 onCopy = { copyMessage(msg) },
+                                onCopyMessageLink = { copyMessageLink(msg) },
                                 onMarkAsUnread = { markAsUnread(msg) },
                                 onRemind = { remindMeLater(msg) },
                                 onPin = { pinMessage(msg) },
@@ -3512,6 +3513,27 @@ class ChatActivity :
         clipboardManager.setPrimaryClip(clipData)
     }
 
+    fun copyMessageLink(message: ChatMessage) {
+        val baseUrl = conversationUser?.baseUrl
+        if (baseUrl.isNullOrEmpty()) {
+            Snackbar.make(binding.root, R.string.nc_common_error_sorry, Snackbar.LENGTH_LONG).show()
+            return
+        }
+
+        // Matches the web client link format: {baseUrl}/call/{token}#message_{messageId}
+        val messageLink = "$baseUrl/call/$roomToken#message_${message.jsonMessageId}"
+
+        val clipboardManager =
+            getSystemService(CLIPBOARD_SERVICE) as ClipboardManager
+        val clipData = ClipData.newPlainText(
+            resources?.getString(R.string.nc_app_product_name),
+            messageLink
+        )
+        clipboardManager.setPrimaryClip(clipData)
+
+        Snackbar.make(binding.root, R.string.nc_common_copy_success, Snackbar.LENGTH_SHORT).show()
+    }
+
     fun translateMessage(message: ChatMessage?) {
         val bundle = Bundle()
         bundle.putString(BundleKeys.KEY_TRANSLATE_MESSAGE, message?.getRichText())

app/src/main/java/com/nextcloud/talk/chat/ui/MessageActionsBottomSheet.kt

@@ -129,6 +129,7 @@ data class MessageActionsState(
     val showForward: Boolean,
     val showEdit: Boolean,
     val showCopy: Boolean,
+    val showCopyMessageLink: Boolean,
     val showMarkAsUnread: Boolean,
     val showRemind: Boolean,
     val showPin: Boolean,
@@ -242,6 +243,8 @@ internal fun buildMessageActionsState(
             isOnline,
         showEdit = isMessageEditable,
         showCopy = !message.isDeleted,
+        showCopyMessageLink = !message.isDeleted &&
+            ChatMessage.MessageType.SYSTEM_MESSAGE != messageType,
         showMarkAsUnread = hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.CHAT_READ_MARKER) &&
             ChatMessage.MessageType.SYSTEM_MESSAGE != messageType &&
             isOnline,
@@ -279,6 +282,7 @@ fun MessageActionsBottomSheet(
     onForward: () -> Unit,
     onEdit: () -> Unit,
     onCopy: () -> Unit,
+    onCopyMessageLink: () -> Unit,
     onMarkAsUnread: () -> Unit,
     onRemind: () -> Unit,
     onPin: () -> Unit,
@@ -306,6 +310,7 @@ fun MessageActionsBottomSheet(
             onForward = onForward,
             onEdit = onEdit,
             onCopy = onCopy,
+            onCopyMessageLink = onCopyMessageLink,
             onMarkAsUnread = onMarkAsUnread,
             onRemind = onRemind,
             onPin = onPin,
@@ -332,6 +337,7 @@ internal fun MessageActionsSheetContent(
     onForward: () -> Unit,
     onEdit: () -> Unit,
     onCopy: () -> Unit,
+    onCopyMessageLink: () -> Unit,
     onMarkAsUnread: () -> Unit,
     onRemind: () -> Unit,
     onPin: () -> Unit,
@@ -436,6 +442,16 @@ internal fun MessageActionsSheetContent(
                         }
                     )
                 }
+                if (actionsState.showCopyMessageLink) {
+                    MessageActionItem(
+                        iconRes = R.drawable.ic_link,
+                        text = stringResource(R.string.nc_copy_message_link),
+                        onClick = {
+                            onCopyMessageLink()
+                            onDismiss()
+                        }
+                    )
+                }
                 if (actionsState.showMarkAsUnread) {
                     MessageActionItem(
                         iconRes = R.drawable.ic_mark_chat_unread_24px,
@@ -808,6 +824,7 @@ private fun PreviewMessageActionsSheetContent() {
         showForward = true,
         showEdit = true,
         showCopy = true,
+        showCopyMessageLink = true,
         showMarkAsUnread = true,
         showRemind = true,
         showPin = true,
@@ -830,6 +847,7 @@ private fun PreviewMessageActionsSheetContent() {
                 onForward = {},
                 onEdit = {},
                 onCopy = {},
+                onCopyMessageLink = {},
                 onMarkAsUnread = {},
                 onRemind = {},
                 onPin = {},
@@ -864,6 +882,7 @@ private fun PreviewMessageActionsSheetPinned() {
                     showForward = false,
                     showEdit = false,
                     showCopy = true,
+                    showCopyMessageLink = true,
                     showMarkAsUnread = false,
                     showRemind = false,
                     showPin = true,
@@ -882,6 +901,7 @@ private fun PreviewMessageActionsSheetPinned() {
                 onForward = {},
                 onEdit = {},
                 onCopy = {},
+                onCopyMessageLink = {},
                 onMarkAsUnread = {},
                 onRemind = {},
                 onPin = {},

app/src/main/res/values/strings.xml

@@ -562,6 +562,7 @@ How to translate with transifex:
 
     <!-- Chat -->
     <string name="nc_copy_message">Copy</string>
+    <string name="nc_copy_message_link">Copy message link</string>
     <string name="nc_forward_message">Forward</string>
     <string name="nc_reply">Reply</string>
     <string name="nc_reply_privately">Reply privately</string>